chapter no. 2 introduction to plant tissue culture
TRANSCRIPT
Chapter No. 2
Introduction to Plant Tissue Culture
INTRODUCTION TO PLANT TISSUE CULTURE
Contents
2.1 Introduction and Definition
2.2 Advantages of Plant Tissue Culture
2.3 Objective of Tissue Culture Project
2.4 Conceptual Foundation of Plant Tissue Culture
Technology
2.5 History of Plant Tissue Culture
2.6 Applications of Plant Tissue Culture
2.7 Flow Chart of Plant Propagation by Tissue Culture
IVIethod
2.8 Important Steps in Plant Tissue Culture
2.9 Commercialization of Plant Tissue Culture Technique
2.10 Indian Scenario
2.11 Assistance for Plant Tissue Culture Business from
Different Sources
2.11.1 Assistance from Government Agencies
2.11.2 Assistance from Micro Propagation
Technology Parks
2.11.3 Assistance from Financial Institutes
2.11.4 Assistance for Marketing
2.11.5 Assistance from Biotech Consortium India
Limited
2.12 Conclusion
INTRODUCTION TO PLANT TISSUE CULTURE
2.1 Introduction and Definition
Agriculture today is on the verge of a technological revolution, in a manner it
has never been seen before. As we enter the new millennium, one key
development that comes to our mind is the emergence of biotechnology, which
offers some of the best opportunities and solutions to some of the
uncontrollable problems faced by us.
Biotechnology is a group of technologies that share two things in common;
they manipulate living cells and their molecules and have a wide range of uses
that can improve our lives. The major techniques of biotechnology are genetic
engineering, cell culture, tissue culture, bioprocessing, protein engineering etc.
Plant Tissue Culture, Cell Culture or Micropropagation is the technique of
producing selected plants of known desirable agriculture qualities, in large
numbers of plants from small pieces of plant in relatively short periods of time.
It is a method of rapid propagation under controlled disease free conditions.
Entire crop population with premium qualities can be created from a single
elite specimen plant. Depending on the species in question, the original tissue
piece may be taken from shoot tip, leaf, lateral bud, stem or root tissue of the
mother plant. Ex-plants from selected mother plant are established and
multiplied under 'In-Vitro' conditions, providing the optimum pre-requisite for
plant growth. These ex-plants go through the initiation, multiplication and
rooting methods for producing a cell into a full-fledged plant. These ready
plantlets are then hardened in climatically controlled green houses or poly
houses. Depending on the species, the plants become ready for plantation in the
field. This technique of plant propagation greatly reduces the labour and space
requirement, for producing new varieties and can also markedly enhance
propagation rates.
Mettiods of plant propagation and establishment are of particular interest to our
country and work on a wide range of vegetables, fruit crops and trees are in
progress. Several scientists have been experimenting to extend the application
of tissue culture to make plant species commercially important. For example
experiments on crops like coconut, date palm. Cashew, Mango, Orange etc. are
being made in the different research laboratories.
With the advent of plant tissue technology, it is now possible to propagate fine
varieties of flowers, forest, and fruit trees by tiny plantlets. Commercialization
of these crops has already taken place. In Ornamental crops, Orchids,
Carnation, Gladiolus, Gerbera, Anthurium etc. has been commercially grown.
In Fruit crops, Banana, Sugarcane etc. has been commercially grown. In Forest
trees. Teak, Eucalyptus etc. has been commercially grown. Medicinal plants are
also being experimented by tissue culture method and soon would be ready for
commercial plantation.
Biotechnology is an area with a tremendous potential in solving basic problems
of food, fiber, fuel and medicine particularly in developing Asian countries.
2.2 Advantages of Plant Tissue Culture are as follows
• Mass multiplication of elite clones: Micropropagation allows the
production of large numbers of plants from small pieces of the mother
plant. The production requires relatively short periods of time to grow
plants. Depending on the species under production, a single ex-plant can be
multiplied into several thousand plants in less than one year.
<• Elimination of diseases in planting material: Another purpose for which
plant tissue culture is uniquely suited is in the obtaining, maintaining, and
mass propagating of specific disease-free plants. The concept behind
indexing plants free of pests is closely allied to the concept of using tissue
culture as a selection system. Plant tissues known to be free of the disease
under consideration (viral, bacterial or fungal) are physically selected as the
explants for tissue culture. Tissue culture could be a useful way of
circumventing or eliminating disease, which can accrue in stock plants.
•J* Plant improvement through tissue culture: Creation of superior varieties
of agricultural crops is possible through tissue culture method, which
otherwise is not possible through conventional plant breeding methods.
•> True to Type production: Large number of true to the type plants could be
propagated within a short time and space and that too throughout the year.
For example, it may be possible to propagate Two to Four lakhs of tissue
cultured plants from a single bush or rose against 10 to 15 plants by
conventional means. Also, it may take about Two to Four months to
produce a healthy planting material by tissue culture means, whereas a
minimum of Six to Eight months is required for most species by the latest
method of plant propagation.
•> Higher Yields: Tissue Culture Plants may have increased branching and
flowering, greater vigour and higher yield, mainly due to possibility of
elimination of diseases.
<• Beneficial when conventional propagation is difficult: The method may
succeed to propagate plants where seeds or conventional propagation is not
possible or difficuk or undesirable.
• Efficient method in saving space and energy: The method saves space
and energy of the farmer. For example, in a conventional method the plants
are grown in the open farm requiring an area of about 25,000 m , same
10
number of plants would require only 10 m^ space, if they are grown in the
tissue culture laboratory.
•> Flexible method: The flexibility of nurseries can be improved. As the
capital investment on mother plant is reduced to almost zero, it may be
easier to adapt to changing conditions. Additionally, a better programme of
production is possible, because of the greater plant uniformity and the
availability in the mass at any time.
• Innovation of new varieties: Tissue culture can be utilized for breeding
new varieties.
2.3 Objective of Tissue Culture Project
The primary objective of tissue culture project could be propagation of large
quantity of good quality planting material from elite mother plants within short
time, space with minimum cost per plant.
2.4 Conceptual Foundation of Plant Tissue Culture Technology i
Plant tissue culture refers to the cultivation "In-Vitro" (Vitro-Glass) of all plant
parts, whether a single cell, a tissue or organ, under disease-free conditions on
nutrient medium.
In the life cycle of any organism, two gamates of opposite sex fuse to form a
single cell-zygote. From this single-celled zygote originates the entire
multicellular and multiorganed body of a higher organism. In a flowering plant,
for example, structures as functionally diverse as underground roots, green
leaves and flowers all arise from the single-celled zygote through millions of
divisions of cells.
1. Plant Tissue Culture Course Material, Modern College
11
Theoretically, therefore, all the cells in a plant body, whether residing in the
flowers, conducting tissues or root tips, should have received the same
genetical material as originally present in the zygote. There must be some other
factors superimposed on the genetic characteristics of cells, which bring about
this vast variation expressed by the genetically identical cells. The process of
variations is called differentiation. This differentiation is actually preceded by
certain cellular and sub cellular changes. A question that arises at this stage is
whether the cellular changes underlying differentiation of various types of cells
are permanent and irreversible or whether there is merely an adaptive change to
suit the functional need of organism in general.
During the normal life cycle of a plant, it is believed, that the events leading to
differentiations are of permanent nature. However, the experiments of
Vochting on polarity in cuttings (1878) suggested otherwise. He had observed
that all cells along the length are capable of forming roots as well as shoots but
their density is decided by their relative positioning of the cutting.
The best way to answer this question and understand more about the
interrelationship between different cells of an organ and different organs of an
organism would however be to remove them from the influence of their
neighbouring cells and tissue and grow them in isolation on nutrient media.
This has led to the foundation of a new branch of biology as 'Cell and Tissue
Culture'. It is applicable to both plant and animal cells. Plant tissue culture has
acquired many practical applications in agriculture, horticulture and forestry. It
is increasingly becoming popular as a part of recent field of Biotechnology.
12
2.5 History of Plant Tissue Culture 2
The German Botanist Guttlieb Haberlandt first proposed the importance of
plant tissue and cell culture in isolation, in 1902. He is regarded as the father of
plant tissue culture. He used tissue of Lamium Puroureum and Eichhornia
crassipes, the epidemis of Ornithooalium and epidermal hairs of Pulmonaria
Mollissima. He grew them on a particular salt solution with sucrose and
observed obvious growth in the cells. The cells remained alive for up to 1
month. They grew in size, changed shape; thickening of cell walls occurred and
starch appeared in the chloroplasts, which initially lacked it. However, none of
the cells divided. The failure was that he was handling highly differentiated
cells and the present day growth hormones, necessary for inducing division in
mature cells, were not available to him.
Hanning (1940) had initiated a new line of investigation, which later developed
into an important applied area of in-vitro techniques. Hanning excised nearly
mature embryos of some plants like Raphanus Sativus and successfully grew
them to maturity on mineral salts and sugar solution. Van Overbeck (1941) and
co-workers demonstrated for the first time the stimulatory effect of coconut
milk, which was similar to embryo sac fluid, on embryo development and
callus formation in Datura. This proved a turning point in the field of embryo
culture, for it enabled the culture of young embryos which failed to grow on a
mixture of mineral salts, vitamins, amino acids and sugar.
Subsequent detailed work by Raghavan and Torrey (1963), Norstog (1965) and
others led to the development of Synthetic media for the culture of younger
embryos. Laibach (1925, 1929) demonstrated the practical applicafion of
2. Plant Tissue Culture Course Material, Modern College
13
embryo culture in the field of plant breeding. He isolated embryos from non
viable seeds of a particular plant and reared them to maturity on a nutrient
medium.
In 1922, working independently Robbins (USA) and kotte (Germany) reported
some success with growing isolated root tips. White made the first successful
report of continuously growing tomato root tips in 1934.
During 1939 - 1950 extensive work on root culture was undertaken by Street to
understand the role of vitamins implant growth and shoot-root relationship.
Gautheret (1934), White (1939) and Nobecourt successfully cultured cells of
Salix, Nicotiana-Hybrid and carrot on synthetic media. They, for the first time,
demonstrated that growth regulators and vitamins if added to media enhanced
the growth forming mess of cells called callus.
Skoog (1944), Tsui (1951), and Miller (1955) demonstrated the induction of
divisions in isolated, mature and differentiated cells by using synthetic as well
as natural compounds. Muir (1953) developed a technique of growing single
cells into liquid medium in case of Tenetes Erecta and Nicotiana Tabacum.
Vasil and Hildeprandt (1965) raised whole plants starting from single cells of
tobacco. Skoog and Miller (1957) showed that changing the relative
concentrations of the two substances in the medium could regulate the organ
differentiation.
The first reports of some embryo formation from Carrot tissue appeared in
1958-59 by Reinert (Germany) and Steward (USA). Ball (1946) successfully
raised whole plants of Lupinus and Tropaeolum by culturing shoot tips. Morel
and Martin (1952), for the first time, recovered virus-free Dahlia plants from
infected individuals by culturing their shoots.
14
Murashige (USA) used this technique to muUiply plants in large number for
several species ranging from ferns to foliage, flower and fruit plants. Guha and
Maheshwari (1966) demonstrated the possibility of raising large numbers of
plantlets from pollen grains of Dhatura. In 1972 Carlson and others produced
the first somatic hybrid between two plants by fiising their protoplasts.
2.6 Applications of Plant Tissue Culture 3
In the early fifties it was observed that plant cells are amenable to chemical
manipulations in the medium whereby they can be induced to form organized
structures and complete plants. This discovery is considered to be very
important for the application of cell and tissue culture methods to overcome
several problems connected with agriculture, horticulture and plant breeding.
1) The technique provides a way for rapid multiplication of desirable and rare
plants. 20,000 plants/year/bud in turmeric, 1,00,000 plants/year/bud in
Eucalyptus were found.
2) As the experiments reveal, virus infected plants also contain some healthy
stocks as such they can be obtained by separating shoot tips for their in-vitro
propagation. This has given successfiil results in Strawberries and Sugarcane.
3) The development of haploids through the technique of anther culture has a
potential significance in basic and applied genetics and plant breeding. During
the past 20 years the technique has been successfully extended to about 20
plant species including some economic plants.
3. Plant Tissue Culture Course Material, Modern College
15
4) The embryo culture has been useful in overcoming seed dormancy. It is also
utilized for producing viable plants from crosses, which normally fail due to
the death of immature embryos. Experiments were successftil in case of Jute
and Rice.
5) The embryo tissue culture is also applied for the propagation of rare plants.
In some experiments, coconuts developed soft, solid and fatty tissue in place of
the liquid endosperm (Mohan Ram, 1976). These are rare and very expensive,
served only at special banquets in Philippines. Under normal conditions the
coconut seeds fail to germinate. Using the technique of in-vitro culture of
excised embryos De Guzman (1969) succeeded in making plantlets from
makapuno nuts.
6) Another important use of embryo culture is found in obtaining some rare
hybrids. It is possible to raise complete hybrid plants through embryo culture.
This method has been profitably used for many interspecific crosses of crops
like Tomato, Papaya and Cotton.
7) It is possible to isolate and culture single cells of plants. This helps in mutant
selection in relation to crop improvement, as done in Tobacco, Datura etc. The
technique is also useful in the production of some chemical substances in the
industry. In some cases cell cultures contained twenty times more chemical
content than the roots.
8) Recently tissue culture is used in protoplast culture of different varieties of
plants and these protoplasts are used for somatic hybridization.
9) A few high performance crop varieties have been widely adopted, resulting
in the disappearance of a large number of older varieties. The forests, which
house the wild races of most of the crops, are being cut on large scale. Hence
tissue culture can be used to preserve germplasm i.e. tissue conservation of
these plants can be done identically.
16
2.7 Flow chart of plant propagation by tissue culture method
PREPARATION OF MEDIUM
I STERLISATION IN AUTOCLAVE
POURING IN BOTTLES
SEALING AND RESTERILISATION
COOLING AND SETTING
I READY FOR INOCULATION
SUBCULTURING
SELECTION OF A MOTHER PLANT
I CUTTING OUT THE EX-PLANT PART
WASHING EX-PLANT IN WATER, SOAP AND ANTISEPTIC SOLUTION
I REWASHING AND SURFACE STERILISATION OF EXPLANTS IN CHEMICAL SOLUTION
SHIFTING OF EXPLANT TO LAMINAR AIR FLOW STATION
SURFACE STERILISATION IN SODIUM HYPOCHLORITE FOLLOWED BY WASING IN DISTILLED WATER FOR 3-4 TIMES
INOCULATION OF EXPLANT ON STERILISED MEDIUM OF KNOWN COMPOSITION
SHIFTING OF CULTURE TO GROWTH ROOM (I5-25''C, 3000 LUX)
3-6 WEEKS
BUNCH OF IN-VITRO SHOOTS (GROWTH)
SEPARATION OF IN-VITRO SHOOTS
TRANSFER TO ROOTING SOLUTION IN GROWTH ROOM
-3 WEEKS
TRANSFER TO GREEN HOUSE FOR HARDENING
17
2.8 Important Steps in Plant Tissue Culture
1. Preparation of medium and sterilization in Autoclave: In the commercial
laboratory, the medium is prepared for initiation, subculture and rooting
purposes. The medium comprises of the nutrients such as Micro Nutrients,
Macro Nutrients, Vitamins, Irons and growth regulators required for the growth
of the plant. The medium is sterilized in the electrically operated Autoclave at
Fifteen pounds temperature. This sterilization is important to avoid the
bacterial contamination. This medium is then poured into the culture bottles
and these bottles are again sterilized in the autoclave. Then the medium is
cooled and is ready for inoculation.
2. Selection of a mother plant and sterilization: The commercial laboratory
decides the plant species, which are to be multiplied in the laboratory.
Accordingly, the mother plants are selected from the virus free areas. Healthy,
disease and virus free plants are selected as mother plants. The actual plant
part, which is called as ex-plant is selected for inoculation. This plant part is
washed with water, liquid soap and antiseptic solution. This ex-plant is washed
again with the chemical solution to avoid any fungal contamination coming
from the field environment. To remove the remnants of the chemicals it is
thoroughly washed by distilled water.
3. Inoculation of explants on sterilized medium of known composition:
Inside the laminar flow station, the ex-plant is treated again with a disinfectant-
Chemical called Sodium Hypochloride. After this treatment the ex-plant is
washed thrice with double distilled water to remove the chemical remnants.
The explants are inoculated on the sterilized medium. The inoculation takes
place in the Inoculation room, on the Laminar Air Flow station, which
maintains a continuous air current, which keeps this bench without the risk of
18
contamination. The expert technicians in the laboratory do the inoculation.
(Figure 1, 2)
4. Shifting of cultures to the growth room: Inoculated cultures are then
shifted to the growth room where a typical temperature of Fifteen to Twenty
degree centigrade with the help of air conditioners and Class 1000 clean air is
maintained. The artificial lighting arrangement is also made for the growth of
the plant. (Figure 3)
5. Shifting of cultures for Subculture: After three to six weeks from
inoculation, the inoculated ex-plant shows growth in multiple shoots. These
shoots are transplanted on the subculture or multiplication medium for ftirther
growth of the plants. For subculture, separate growth medium is prepared.
Several subculture cycles are done in the laboratory for mass production from
the ex-plant. (Figure 2)
6. Separation of in-vitro shoots and rooting: The shoots are separated in the
laminar airflow stations and these fully grown shoots are transferred to the
rooting medium for root generation. Depending upon the species, rooting
requires One to Three weeks. (Figure 2)
7. Transfer to green house for hardening: Rooted shoots are removed from
the laboratory and are transferred to the green house for hardening. In the
hardening procedure the plants are first kept in the humidity chambers for
acclimatization and then are transferred to the green house. (Figure 4)
19
Figure 1.
Closer look of ex-plant at inoculation
Figure 2.
Laboratory operators at inoculation, subculture and rooting work.
20
Figure 3.
Cultures in Growth Room
X V
Figure 4.
Plants transferred to green house for hardening
21
2.9 Commercialization of Plant Tissue Culture technique
In Western Europe, commercial micro-propagation started as late as early
1980's and there were total two hundred and forty commercial plant tissue
culture laboratories producing millions of plants per year by the end of 1988.
Even Holland started commercial micro-propagation in 1980's and by the end
of 1988 Holland was producing sixty two million plants with the help of sixty-
seven tissue culture laboratories. Even Israel had five commercial tissue culture
laboratories producing five million plants per year by the end of 1988.4
Also in other countries many commercial tissue culture laboratories were set up
and produced millions of plants for their country. These countries included,
Poland, Yugoslavia, and Soviet Union etc.
In America commercial micro-propagation started in 1965 and there were
about hundred commercial tissue culture laboratories then.
2.10 Indian Scenario
In 1980's while all these countries were producing millions of plants, India had
only four commercial tissue culture laboratories. Eventually the laboratories
increased, but they were unable to produce the quantity that agriculture and
horticulture market needed.
Many commercial plant tissue culture laboratories commenced operations in
1990's. Currently the plant tissue culture is well studies, experimented and
4. Biotechnologies for Agriculture and Aqua Culture. Chapter 27-Present capabilities in Commercial Tissue Culture and the Potential for Growth. Dr. Jitendra Prakash 195-199
22
accepted in India. India has achieved a milestone in this technique by
conducting research and development with well-equipped research laboratories
like; Indian Council for Agriculture Research, Delhi; Indian Institute of
Horticulture Research, Bangalore and National Chemical Laboratory, Pune.
Now the need is to make this technique strong in the commercial area of
production.
Despite of the support of the national level Research Institutes, Agricultural
Universities and Government Agriculture Department, commercial tissue
culture is still facing multifarious problems.
2.11 Assistance for Plant Tissue Culture business from different
sources
It was found that different type of financial and technical assistance was
available for commercial plant tissue culture laboratories. The commercial
laboratories did not identify these sources. Following are the different
assistance schemes available for commercial tissue culture laboratories.
2.11.1 Assistance from Government Agencies
Various Central and State Government agencies have been trying hard to boost
agriculture business and agriculture processing sector in the State. The lacking
factor is, a dialogue between the farmers, agriculture industry and the
Government development agencies. To fill up this gap. Government
departments have come up with different schemes. Most of the commercial
laboratories were not aware about these schemes. Commercial laboratories
should study these schemes and make use of them in making their business
cost-effective.
23
Schemes implemented by Central and State Government for promotion of
Agri Business and Agro Processing Sector:
1. Name of the scheme: To establish Tissue Culture Laboratory in private
sector.
Scheme implementing agency: Central Government
Nature of Assistance: Assistance is available for one unit per year for
private sector for establishing tissue culture laboratory. Subsidy available is
Rupees Ten Lakhs.
2. Name of the scheme: Assistance for establishing Green Houses.
Scheme implementing agency: Central Government
Nature of Assistance: Under this scheme for establishing Green Houses for
high tech agriculture following assistance is available.
a) G.H.I: Green house frame and U.V. Film would be subsidized upto
Fifty percent with a limit of rupees Thirty-one thousand two
hundred and fifty only for one green house.
b) G.H.2: For partially controlled green houses using Fan and Pad,
subsidy at the rate of forty percent with the limit of rupees One lakh
is available.
Both the schemes of green house are provided with the assistance only for
five hundred sq.mtr. of area for each beneficiary.
3. Name of the scheme: Assistance for Drip Irrigation for High Value Crops.
Scheme implementing agency: Agriculture Department, Government of
Maharashtra
Nature of Assistance: Under Centrally sponsored scheme assistance is
provided for drip irrigation system for fruits, flowers and vegetables. The
rate of subsidy is ninety percent for B.C., S.T., small and marginal farmers
24
and women. For other farmers the rate of subsidy is seventy percent.
Subsidy is available for an area upto limits prescribed under Agricultural
Land Ceiling Act. The rate of subsidy is rupees twenty five thousand per
hector as the maximum limit.
4. Name of the scheme: Property tax on Green House
Scheme implementing agency: Government of Maharashtra
Nature of Assistance: Green houses and Poly houses build for high tech
cultivators of Vegetables, Flowers and Nursery plants will not be charged
property tax by village panchayats.
5. Name of the scheme: To provide electricity at a concessional rate for high
tech. agriculture.
Scheme implementing agency: Maharashtra State Electricity Board.
Nature of Assistance: Electricity rate for high tech agriculture like tissue
culture, green houses in Private and Public sector will have concessional
rate as follows:
a) Rupees two and twenty-five paise per unit for high tech agriculture,
which would include tissue culture and mushroom cultivation.
To avail the benefit from Maharashtra State Electricity Board for a
concession in electricity charges, the laboratory should be located out side
the Industrial area.
2.11.2 Assistance from Micro propagation technology parks
In order to promote tissue culture activities, the Department of Biotechnology,
Ministry of Science and Technology, Government of India has developed
Micropropagation Technology Parks. At present there are two
Micropropagation Technology Parks in existence. One is located in
25
Maharashtra at the National Chemical Laboratory, Pune and the other is at Tata
Energy Research Institute, New Delhi. The technology parks are developed to
provide an effective platform for transfer of proven technologies to the
entrepreneurs in the field of commercial plant tissue culture. The technology
parks also act as an interface between the Research Institutes and the tissue
culture business for accelerating commercialization of the tissue culture
technology.
Micropropagation technology parks offer following services to the tissue
culture business:
1. Technology transfer: Transfer of proven technologies to the users,
training, implementation and adoption of the technology at the client's
site.
2. Contract research: Development of process for the newer crops,
refinement of existing protocol.
3. Technical assistance for production of plants: An indigenously
designed highly sophisticated laboratory and green house exists to
produce plants on large scale. A strong group of scientists and highly
experienced staff are available with the unit and give technical
assistance for production of plants for plantation programs or field trials.
4. Training of the personnel: Training programs are organized on general
training for plant tissue culture and specialized training on specific plant
of interest.
26
5. Setting up and commissioning of tissue culture laboratory and green
house: Designing of the laboratory and green house, equipping the
laboratory and the green house.
6. Advisory consultancy for overall running of the laboratory:
Consultancy provided for running a tissue culture unit, which includes
all the aspects, right from washing of glassware till production and
hardening of plants in the green house.
7. Turn-key project based on the client's need: All the above services
can be taken singly or in combinations as per the needs. Turn-key
project is also offered which includes all the above services together and
any other related aspects or problems.
2.11.3 Assistance from Financial Institutes
Financial assistance is available to tissue culture business houses from the State
Bank of India, Bank of Baroda, Central Bank of India, Dena Bank and
NABARD. The terms and conditions of assistance differ from institution to
institution.
2.11.4 Assistance for Marketing
National Horticulture Board, Ministry of Agriculture, Government of India was
set up in 1984 for integrated development of horticulture in the country.
National horticulture board encourages and promotes the development of
horticulture industry in the country. The board helps in increasing production
and marketing of horticulture produce.
27
National Horticulture Board's developmental program in marketing:
Development of marketing of horticulture produces through participation of
Soft Loan.
Objective: To increase flow fresh and processed horticultural produce to
targeted domestic and external markets.
Commodities: Fruits, vegetables of commercial importance
Assistance: The loan support will be made upto forty percent of the loan
portion upto a limit of rupees hundred lakhs per project @ four percent
surcharge per annum, repayable in five installments after a moratorium of three
to five years.
2.11.5 Assistance from Biotech Consortium India Limited
Biotech Consortium India Limited was set up with the objective of providing
the linkages to facilitate accelerated commercialization of biotechnology. This
organization was incorporated as a public limited company in 1990 under the
Indian Companies Act 1956. It is promoted by the Department of
Biotechnology, Government of India.
Biotech Consortium India Limited has been engaged in technology
development, technology transfer, project consultancy, fund syndication,
information dissemination, manpower training and placement related to
biotechnology.
It has assisted over One hundred and twenty clients including scientists,
technologists, research institutions, universities, first generation entrepreneurs,
the corporate sector, government, banks and financial institutions.
28
2.12 Conclusion
Propagation by tissue culture offers good commercial prospects in ornamental
plants, vegetables and fruit plants, where value of the product is high. In India
the tissue culture technique has reportedly been successful in more than a
hundred species of plants. It has been estimated that in India, more than Three
hundred and fifty million tissue cultured plants are being produced annually
through tissue culture method.
Plant Tissue Culture has come to stay as a tool in plant biology. Plant Tissue
Culture has the potential to resolve the problems of experimental biology,
which otherwise through conventional methods is difficult to tackle. In the near
future this technique will play a very prominent role in genetic engineering,
breeding and afforestation programs. Tissue culture technique is a boon for the
agriculture and the horticulture industry because of its numerous advantages.
Tissue culture can produce several number of healthy, virus free and true-to-
type plants. The advantage of this technique is such that these plants can be
planted anytime during the year, which solves farmers' seasonal plantation
problems.
Disease-free plants, multiplied through tissue culture, produce higher yields
than infected ones. This biotechnology application can be used for both,
traditional and new varieties. Carefully monitored production would ensure
clean plantlets for distribution.
Tissue culture activity is taking a shape of an industry as many farmers are
planting tissue culture grown plantlets; agro-traders are buying and selling
tissue culture grown plantlets while some are exporting either the plantlets or
the produces of plants grown by tissue culture, especially varieties of flowers
29
like roses, anthuriums and gerberas are enjoying high profits. Tissue cukure is
the greatest advancement in plant breeding. Agriculture and horticulture
industry should take full advantage of this technique in reaching the greatest
heights at national and international levels.
In India, tissue culture is rapidly becoming a commercial method for
propagating new and rare species and difficult-to-propagate plants. From a few
research laboratories several years ago, a whole new industry is emerging.
Currently, the demand for micro propagated plants is greater than the supply
with some plants. Some growers specialize in only the micro propagation of
plantlets, leaving the growing-on i.e. hardening activity to others. Many
growers are integrating a tissue culture laboratory into their overall operation.
While many plant tissue culture laboratories are coming up, some of the
laboratories are being closed down due to various reasons and many of the
existing laboratories are found to be complaining about the problems they are
facing. Commercial use of plant tissue culture technique has vast business
potential if tissue culture laboratories are freed of their constraints, particularly
financial and marketing. They are the businesses that would enable India retain
its self-sufficiency on agricultural production front. Finance being the heart of
any business, finances will have to be controlled and regulated systemically in
tissue culture business as well. A thorough study of the financial viability and
commercial prospects of the tissue culture venture should be carried out by the
new entrant. It is the need of the time with the backdrop of an era of
globalization and the emergence of World Trade Organizafion.
30