Hypogeal germination txhais tau tias cotyledons nyob hauv av. Lub epicotyl (ib feem ntawm qia saum lub cotyledon) loj hlob, thaum lub hypocotyl (ib feem ntawm lub qia hauv qab lub cotyledon) tseem zoo ib yam nyob rau hauv ntev. … Nquag, cov cotyledon yog nqaij, thiab muaj ntau cov as-ham uas siv rau germination.
Yuav ua li cas rau qhov kev loj hlob ntawm hypogeal?
Nyob rau hauv cov germination hypogeous, cov hypocotyl tseem luv thiab cov cotyledons tsis tawm ntawm cov noob tab sis theej quab yuam lub radicle thiab epicotyl axis kom elongate tawm ntawm lub tsho tiv no. Cov noob, nrog rau cov cotyledons kaw, tseem nyob hauv av, thiab cov epicotyl loj hlob los ntawm…
Ib qho piv txwv ntawm hypogeal germination yog dab tsi?
Nyob rau hauv hypogeal germination, cov cotyledons nyob hauv av. Tab sis, nyob rau hauv epigeal germination, lub hypocotyls thawj zaug tuaj saum av saum npoo thiab ces ncaj. Piv txwv ntawm hypogeal germination yog gram, pea, thiab lwm yam. Piv txwv ntawm epigeal germination yog av txiv ntoo, taum, thiab lwm yam.
Tus qauv ntawm kev cog qoob loo yog dab tsi?
Tom qab cov hauv paus nqus dej, ib qho embryonic tua tawm ntawm cov noob. Qhov kev tua no suav nrog peb qhov tseem ceeb: cov cotyledons (noob nplooj), ntu ntawm tua hauv qab cotyledons (hypocotyl), thiabntu ntawm tua saum cov cotyledons(epicotyl). Txoj kev tua tawm txawv ntawm pawg nroj tsuag.
Cov qoob loo twg hauv qab nocov noob sawv cev rau cov noob qoob noob qoob noob qoob loo?
Ntawm dicotyledons, gram, pea (Fig. 4.2), groundnut yog ib co piv txwv ntawm hypogeal germination. Nyob rau hauv monocotyledons (piv txwv li, nplej, pob kws, mov, txiv maj phaub) radicle thiab plumule tawm los ntawm kev tho lub coleorrhiza thiab coleoptile feem. Lub plumule hlob tuaj thiab thawj nplooj tawm los ntawm coleoptile.
