2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Kev piav qhia: Xyoo 1963, Stuart Letham tau muab rho tawm thiab txheeb xyuas qhov sib xyaw hu ua zeatin los ntawm pob kws (Zea mays; pob kws) kernels. Qhov no yog thawj zaug tshwm sim cytokinin los txheeb xyuas, thiab nws siv sijhawm li 40 xyoo kom tau txais kev pom zoo tias cytokinins yog cov khoom tsim los ntawm cov nroj tsuag nws tus kheej.
Qhov twg hauv qab no yog ntuj cytokinins?
thawj hom cytokinin uas tau txheeb xyuas tau ua kom huv los ntawm cov pob kws tsis paub tab thiab muaj npe ' zeatin'. Ob peb lwm cytokinins nrog cov qauv muaj feem xyuam tau paub niaj hnub no. Cytokinins muaj nyob rau hauv tag nrho cov ntaub so ntswg. Lawv muaj ntau nyob rau hauv cov hauv paus hniav, tua apex, thiab cov noob tsis paub tab.
Puas yog cytokinins ib txwm tsim los ntawm cov nroj tsuag?
Ntau cytokinins tshwm sim hauv cov nroj tsuag. Lawv muaj adenine puag thiab tsib carbon isopentenyl sab saw. Ntawm cov no, zeatin, tshwj xeeb tshaj yog trans-zeatin, yog qhov ntau tshaj.
Qhov twg hauv qab no yog piv txwv ntawm cytokinin?
(Science: protein) chav kawm ntawm cov tshuaj cog qoob loo (cov tshuaj hormones cog) ua haujlwm hauv kev txhawb nqa cell faib. Kuj koom nrog hauv kev loj hlob ntawm tes thiab kev sib txawv thiab hauv lwm cov txheej txheem physiological. Piv txwv li: kinetin, zeatin, benzyl adenine.
Natural cytokinin synthesized nyob qhov twg?
Natural cytokinins yog synthesized nyob rau hauv cheeb tsam uas ceev cell divisions tshwm sim zoo li cag apices, tsim tua buds thiab cov txiv hmab txiv ntoo hluas. E.g. zeatin,thawj lub ntuj cytokine tau los ntawm unripe pob kws nplej los yog kernels. Nws tseem tuaj yeem pom hauv txiv maj phaub mis.
Pom zoo:
Nyob rau hauv cov nroj tsuag cov receptor rau ntes photoperiod yog?
Ntau cov paj ntoo (angiosperms) siv cov protein ntau ntawm cov photoreceptor, xws li as phytochrome lossis cryptochrome, kom nkag siab txog kev hloov pauv raws caij nyoog nyob rau hmo ntev, lossis photoperiod, uas lawv coj los ua lub cim rau paj.
Kev ua pa tshwm sim nyob rau hauv cov nroj tsuag nyob qhov twg?
Nyob hauv ib puag ncig ntuj, cov nroj tsuag tsim lawv cov zaub mov kom ciaj sia. Raws li nrog photosynthesis, cov nroj tsuag tau oxygen los ntawm huab cua los ntawm stomata. Kev ua pa tshwm sim nyob rau hauv mitochondria ntawm lub cellnyob rau hauv lub xub ntiag ntawm oxygen, uas yog hu ua "
Cov tsiaj twg tsis ncaj nraim nyob ntawm cov nroj tsuag rau zaub mov?
tsiaj txhuv is indirectly dependent on plant for food. Yog li, kev xaiv-(1)=> carnivorous yog cov lus teb xav tau. Cov tsiaj uas noj cov nroj tsuag tsuas yog hu ua herbivores. Piv txwv li: nyuj, mos lwj, zebra, thiab lwm yam. Yuav ua li cas cov tsiaj tsis ncaj nraim nyob ntawm zaub mov?
Nyob rau hauv vernalisation flowering nyob rau hauv cov nroj tsuag yog?
Vernalization (los ntawm Latin vernus, "ntawm lub caij nplooj ntoos hlav") yoginduction ntawm cov nroj tsuag flowering txheej txheem los ntawm raug rau lub caij txias ntawm lub caij ntuj no, los yog los ntawm ib qho khoom sib npaug.
Cov nroj tsuag sab hauv tsev hauv cov nroj tsuag?
Cov nroj tsuag zoo tshaj plaws hauv tsev muaj xws li hauv qab no: Aglaonema - Nws yog qhov txaus nyiam, zam lub teeb qis, thiab tsis loj hlob sai. Aspidistra - Koj yuav tsum tsis txhob muab dej ntau thiab nws yuav ua rau lub teeb qis. … Succulent - Nco ntsoov tias koj muab lub teeb ci rau lawv.
