Download - As plantas: froitos
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AS PLANTASfroitos froitos
e sementese sementes
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FROITOSECO
FROITOCARNOS
O
Parte da planta formada por varias capas que envolven ás sementes.
Protexe as sementes e axuda á súa dispersión
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Os froitos verdadeiros desenvólvense a partir do ovario da flor fecundada.
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TIPOS DE FROITOS
CARNOSOSunha envoltura carnosa
que almacena zugos
SECOS envoltura seca e dura
INDEHISCENTESnon se abren para
soltar as sementes
DEHISCENTESábrense para
soltar as sementes
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FROITOS CARNOSOS
Drupaunha única semente leñosa
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olivas claudias
noz
Drupas
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cereixas
dátiles
Drupas
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Baia ou bagacon moitas sementes, epicarpo delgado, mesocarpo e endocarpo carnosos
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uvaspapaia kiwicacao
Baias, bagas
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Baias, bagas
pementos
berenxena
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Pepónidepericarpo duro, moitas sementes
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cabazas
calacús
melón
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Hesperidioepicarpo glanduloso, endocarpo membranoso, dividido en “chavos”.
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laranxa
mandarina
limón kumquat
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Aqueniounha soa semente sen apegar á envoltura exterior
FROITOS SECOS INDEHISCENTES
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Aquenios con elementos para desprazarse co vento
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Sámaraenvoltura con prolongacións membranosas a xeito de ás
pradairo
ailanto
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Cariópsideunha soa semente apegada á envoltura exterior
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Lomentocon tabiques separando as sementes
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Glandecuberto cunha cúpula; semente cos cotiledóns carnosos
carba
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GLANDES: landras
sobreira
aciñeiracarballo
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FROITOS SECOS DEHISCENTES
Legumecon varias sementes, ábrese lateralmente
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xudías
acacia xesta
cacahuetes
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Silicuacon varias sementes que quedan nun tabique central
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Folículocon moitas sementes, en xeral ábrese lateralmente
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cápsula ou caixacon varias sementes, ábrese lateralmente ou por arriba
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cápsulas
camelia
eucalipto
cebola das gaivotas
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FROITOS MÚLTIPLESdesenvólvense a partir de flores con varios carpelos nas que cada ovario forma o seu froito independentemente.
polifolículo polidrupa cinorrodon eterio poliaquenios
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Polifolículovarios folículos
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Polidrupavarias drupas
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Cinorrodonvarios aquenios dentro dun receptáculo
roseiras
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Poliaqueniovarios aquenios
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Eterioaquenios arredor dun soporte carnoso
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AGRUPACIÓNS (INFRUTESCENCIAS)fórmanse a partir de flores agrupadas en
inflorescencias
sicono cúpula capítulo acios pseudoestróbilo espiga poliacantocarpo
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Cúpulavarios froitos protexidos por envolturas
faia
castiñeiro
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Espigafroitos agrupados arredor dun eixo
trigo
millo
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Espiga (ciperus)
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Siconofroitos secos dentro dun soporte carnoso e pechado
figo
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Aciofroitos con rabo sobre un eixoPanículaacio ramificado varias veces
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Poliacantocarpogrupos de aquenios acompañados de brácteas
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Pseudoestróbiloaquenios con brácteas leñosas
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Cabeza ou capítulofroitos secos sobre unha base discoidal ou esférica
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Umbelagrupo de froitos con rabos que saen do mesmo punto
Umbela doble
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FROITOS FALSOSA parte carnosa non se desenvolve a partir do ovario
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Pomoreceptáculo coas sementes rodeado dunha formación carnosa
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Soroseeixo e capa grosos e carnosos. Inclúe froitos, cálices e brácteas.
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O froito máis grande é o da árbore Artocarpus heterophyllus que pode pesar ata 50 quilos.
Algunhas cabazas tamén poden acadar este peso e 1 m de diámetro.
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ALIMENTO trigo, arroz, millo, tomate, mazán, pera, melocotón, pemento, laranxa, limón, cabaza, plátano, pepino, berenxena, oliva, uva...
CONDIMENTO pemento, pimenta, limón, oliva, comino...
MEDICIÑA limón, anís, anís estrelado...
PERFUMES, ESENCIAS
limón, mazán, fresa, plátano...
FEBRAS algodón, miraguano, coco
ALGÚNS USOS DOS FROITOS
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comino
pimentónguindiña
pimenta
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algodón
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É a estrutura a partir da que se propagan as plantas fanerógamas ou espermafitas.
Prodúcese a partir da fecundación e maduración dun óvulo.
Contén ao embrión xunto con substancias de reserva, protexidos por unha cuberta.
A sementeA semente
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Sementes xerminando
piñeiro claudieira
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TIPOS DE SEMENTES
MONOCOTILEDÓNEASun único cotiledón
DICOTILEDÓNEASdous cotiledóns
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ALGÚNS USOS DAS SEMENTES
ALIMENTO noz, castaña, améndoa, piñón, mirasol, cabazas, garbanzoa, lentellas, xudías, fabas, coco, soia...
CONDIMENTO noz moscada, comino...
MEDICIÑA liñaza, ricino, soia...
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arroz
lentellasgarbanzos
fabóns
soia
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Semente máis grande: cocoteiro de mar: ata 27 kg
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ESTRUTURAS REPRODUTIVASDAS XIMNOSPERMAS
Sementes que se desenvolven sen ovario
CONÍFERAS CICADALES GNETOFITASGINGKOALES
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Piñeiro silvestreP. radiata
Piñeiro bravo Piñeiro manso
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cedro
alerce
abeto
alcipreste
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Estróbilos femininos
Cica
Flores masculinas
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GINKGO
Flores masculinas
Flores femininas
sementes
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Flores femininas e conos coas sementes
welwitschia
Flores masculinas
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XEITOS DE DISPERSIÓN DOS FROITOS E AS SEMENTES
AUGA VENTOOUTRAS:
Lume, gravedade,
autodispersión …
ANIMAISDixestión, enganche,
enterramento…
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Montaxe: Adela LeiroFotos: Adela Leiro, Mon Daporta, InternetDebuxos: Mon Daporta