monocots and eudicots (dicots) …the most abundant vascular plants
TRANSCRIPT
Monocots and Eudicots (Dicots)
…the most abundant vascular plants
Monocots and Eudicots (Dicots)
…the most abundant vascular plants
Classification of Plants Kingdom
- Subkingdom
- Division
Class
Order
PLANTS
Bryophytes (non-vascular) Mosses, liverworts, hornworts
Tracheophytes vascular
has xylem and phloem
Text pg 544
Tracheophytes – Vascular plants “Roots and Shoots”
Above ground = shoots Under ground = roots
Three tissue types Dermal tissues Vascular tissues Ground tissues
Major organs (non-reproductive) Leaf Stem Root
PLANTS
Tracheophytes vascular
has xylem and phloem
Tracheophytes – Vascular plants “Roots and Shoots”
Above ground = shoots Under ground = roots
Three tissue types Dermal tissues Vascular tissues Ground tissues
Major organs (non-reproductive) Leaf Stem Root
Meristemic Tissue – only regions where cells divide repeatedly by mitosis (sites of growth)
Tissue Description Function
apical meristem at root and shoot tips primary growth – increases in LENGTH
lateral meristem cylinders of tissue within roots and stems
secondary growth – increases in diameter
Dermal – a plants skin (protective)
Tissue Description Function
Epidermis -outermost cell layer in primary growth regions
Produces waxy cuticle – prevents water loss and infection, restricts gas exchange
Periderm -outside layer at sites experiencing secondary growth-replaces epidermis-often multiple cell layers
Waterproofs roots and stems, protects inner tissues from structural damage
Ground – all the internal nonvascular regions
Tissue Description Function
Parenchyma Spherical, thin-celled walls with large vacuoles
-Storage of nutrients, carbs (sugars and starches) and water-heals wounds, regenerates plant parts
Collenchyma Long cells with thickened cell walls -strength-supports primary growth regions-flexibility to withstand wind
Sclerenchyma -very thick secondary cell wall of cellulose and lignin-long cells
-Strength and rigidity
Vascular – a plant’s circulatory system (transport)
Tissue Description Function
Xylem -tracheids long, tapered, thick-walled cells with overlapping ends and pits (unthickened areas) on cell walls-vessel elements – short, large diameter thick walled cells with open ends; stacked like barrels to make vessels
Transports water and dissolved minerals, usually upward from roots to leaves
Vascular – a plant’s circulatory system (transport)
Tissue Description Function
Phloem Sieve tube elements – long thin cells with tiny holes at the sloping ends (a sieve), and pits along side alls; no nucleus, ribosomes, Golgi, vacuoles, stacked to form sieve tubes
-transports food (sugars etc) from leaves to the plant bodyCompanion cells: direct sieve tubes
Classification of Plants Kingdom
- Subkingdom
- Division
Class
Order
PLANTS
Bryophytes (non-vascular) Mosses, liverworts, hornworts
Tracheophytes vascular
has xylem and phloem
Spore producing (ferns)
Seed producing
Gymnosperms (cone bearing)
Angiosperms (seed
enclosed flowering plants)
Lycophytes (club mosses)
Other early angiosperms
Nymphaeales
Amborellales Monocotyledons (1/4 of all angiosperms)
Text pg 544
Eudicotyledons(2/3 of all angiosperms)
Dicots
Dicots
Dicots
Dicots
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Comparing Monocots and Eudicots/Dicots
Actual pictures:
http://theseedsite.co.uk/monocots2.html
Leaf Venation
Eudicots (Dicots)
Practice Problems (HomeFUN!) Prep for this unit
Questions 1-10 and 12 page 538-539 Section 12.1
Read pages 540-545 Answer 1-4 and 6
Section 13.5 Read pages 605-607 Questions 1,2,4 page 612