Qhov sib txawv tseem ceeb ntawm generative nucleus thiab pollen tube nucleus yog qhov generative nucleus yog ib qho ntawm ob tug txiv neej nuclei ntawm cov noob nroj tsuag uas fuses nrog poj niam nucleus nyob rau hauv lub embryo sac thaum paj ntoos tube nucleus yog lub nucleus uas coj pollen raj. kom loj hlob raws cov pistil mus rau hauv lub hnab embryo poj niam.
Kev hloov paj ntoos los ntawm anther mus rau stigma yog hu ua pollination. Thaum pollens tsaws rau saum npoo ntawm stigma, paj ntoos pib germination thiab thauj txiv neej nuclei mus rau poj niam nucleus rau fertilization. Thaum lawv germinate, txhua paj paj noob qoob loo loj hlob ib lub paj paj rau hauv cov ntaub so ntswg stigmatic, thiab txiv neej gametes txav raws lub paj paj ntoos. Lub raj paj ntoos yog cov qauv tubular tsim los ntawm txiv neej gametophyte ntawm cov noob nroj tsuag. Nws muaj ib lub raj nucleus thiab ob lub generative nuclei. Generative nuclei yog txiv neej nuclei. Lub raj nucleus coj cov txiv neej nuclei taug kev raws li style mus rau lub embryo sac, uas yog poj niam gametophyte ntawm angiosperms. Thaum txiv neej nuclei nkag mus rau hauv lub embryo sac, ob chav fertilization tshwm sim nyob rau hauv angiosperms.
Dab tsi yog Generative Nucleus?
Generative nuclei yog txiv neej gametes uas yuav koom ua ke nrog poj niam nuclei hauv lub hnab embryo. Muaj ob lub generative nuclei hauv txhua lub paj paj ntoos. Lawv yog cov nuclei haploid, thiab lawv pib thaum paj noob hlis nucleus faib los ntawm mitosis.
Daim duab 01: Ob npaug Fertilization
Feem ntau, angiosperms tau ua ob zaug fertilization. Yog li ntawd, ob qho tib si generative nuclei fuse cais nrog poj niam nuclei. Ib tug txiv neej generative nucleus fuses nrog lub qe nucleus los tsim lub zygote. Ob tug txiv neej generative nucleus fuses nrog ob tug polar nuclei los ua tus triploid endosperm. Triploid endosperm yuav muab lub zog rau lub embryo txoj kev loj hlob thiab kev loj hlob.
Pob zeb Tube Nucleus yog dab tsi?
Pollen tube nucleus yog lub nucleus uas coj lub paj paj ntoo kom loj hlob raws li cov pistil rau hauv poj niam gametophyte (embryo sac). Tsis tas li ntawd, pollen tube nucleus tswj kev loj hlob ntawm pollen tube. Zoo ib yam li cov generative nuclei, paj ntoos tube nucleus kuj haploid. Tsis tas li ntawd, nws tshwm sim thaum paj noob hlis noob qoob loo faib los ntawm mitosis.
Daim duab 02: Paj paj ntoos
Pollen tube nucleus yog ib qho tseem ceeb heev vim nws yog lub hauv paus uas coj cov paj noob hlis txoj kev loj hlob, nkag mus ntawm paj ntoos raj ntawm micropyle mus rau hauv lub embryo sac thiab nqa txiv neej nuclei rau fertilization. Thaum lub paj paj ntoos mus txog lub ovule, nws tawg tawm xa txiv neej nuclei.
Dab tsi zoo sib xws ntawm Generative Nucleus thiab Pollen Tube Nucleus?
- Generative nucleus thiab pollen tube nucleus yog ob hom nuclei pom nyob rau hauv paj ntoos tube.
- Ob, lub generative nucleus thiab pollen tube nucleus yog originated thaum paj noob hlis nucleus faib los ntawm mitosis.
- Ob lub nuclei yog haploid.
- Generative nucleus thiab pollen tube nucleus muaj nyob rau hauv angiosperms thaum lub sij hawm kev sib deev.
Qhov txawv ntawm Generative Nucleus thiab Pollen Tube Nucleus yog dab tsi?
Lub generative nucleus yog ib tug ntawm ob tug txiv neej nuclei ntawm noob nroj tsuag uas undergo fertilization. Pollen tube nucleus yog lub nucleus uas coj txoj kev loj hlob ntawm pollen raj los ntawm pistil. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm generative nucleus thiab pollen tube nucleus. Hauv txhua lub paj paj noob hlis, muaj ob lub noob qoob loo thiab tsuas yog ib lub paj paj noob hlis. Ntxiv mus, generative nuclei fuse nrog poj niam nuclei thaum paj ntoos tube nucleus tsis fuse nrog poj niam nuclei.
Cov hauv qab no infographic tabulates ntau qhov sib txawv ntawm generative nucleus thiab pollen tube nucleus.
Summary – Generative Nucleus vs Pollen Tube Nucleus
Pollen grain nucleus faib los ntawm mitosis thiab tsim cov nuclei. Ob lub nuclei yog generative nuclei thaum ib tug yog paj ntoos tube nucleus. Generative nuclei yog txiv neej nuclei; Ib qho fuses nrog lub nucleus ntawm lub qe qe los tsim cov zygote thaum lwm lub nucleus fuses nrog ob lub ntsiab lus ntawm lub cev los tsim cov endosperm. Pollen tube nucleus coj pollen tube loj hlob nyob rau hauv lub pistil mus rau hauv lub embryo sac. Ob leeg, lub generative nucleus thiab paj noob hlis noob nucleus yog haploid. Yog li, qhov no qhia txog qhov sib txawv ntawm cov generative nucleus thiab pollen tube nucleus.
