Qhov sib txawv ntawm qhov germination thiab tshwm sim yog cov noob germination yog kev loj hlob ntawm cov noob rau hauv cov nroj tsuag tshiab thaum tshwm sim yog qhov zoo li ntawm ib tug yub los ntawm av.
Cov noob yog fertilized ovules ntawm cov noob nroj tsuag. Lawv yog cov qauv dormant thiab muaj cov khoom noj tshwj xeeb. Lub tsho tiv no tiv thaiv cov noob los ntawm ib puag ncig hnyav. Hauv angiosperms, peb tuaj yeem pom cov noob hauv cov txiv hmab txiv ntoo thaum nyob hauv gymnosperms, peb tuaj yeem pom cov noob liab qab. Thaum cov noob tuaj txog ntawm qhov chaw tshiab, lawv germinate thiab loj hlob mus rau hauv cov nroj tsuag tshiab nyob rau hauv tej yam kev mob. Peb hu cov txheej txheem no noob germination. Ib tsob ntoo uas tawm los ntawm cov noob tuaj yeem loj hlob mus rau hauv ib tsob ntoo tshiab. Yog li ntawd, noob germination thiab seedling tshwm sim yog ob yam tseem ceeb tshwm sim nyob rau hauv cov nroj tsuag.
YYam yog dab tsi?
Germination yog txheej txheem ntawm kev tsim cov noob rau hauv cov nroj tsuag tshiab. Feem ntau, cov noob yog cov qauv dormant. Thaum cov xwm txheej ib puag ncig ua rau, cov noob pib loj hlob thiab tsim mus rau hauv cov nroj tsuag tshiab. Ua ntej, cov noob nqus dej los ntawm imbibitions thiaj li qhib tau cov enzymes hydrolytic. Yog li, kev muaj dej yog qhov tseem ceeb rau kev cog qoob loo. Tsis tas li ntawd, kub, oxygen, tshav ntuj, thiab lwm yam kuj cuam tshuam rau cov noob germination.
Daim duab 01: Seed Germination
Cov activated enzymes rhuav tshem cov zaub mov ntawm cov noob thiab tso cai rau cov noob loj hlob. Ib lub hauv paus tuaj tawm ua ntej los ntawm cov noob thiab hlob mus rau hauv av, nrhiav dej. Tom ntej no, ib tug tua tshwm thiab loj hlob mus rau saum toj no av, tshawb nrhiav hnub ci. Ib yam li ntawd, cov nroj tsuag tshiab tsim los ntawm cov noob thiab tom qab ntawd nrog lub sijhawm, cov yub loj tuaj thiab dhau los ua tsob ntoo.
Kev kub ntxhov yog dab tsi?
Seedling tshwm sim tshwm sim thaum lub active kev loj hlob ntawm embryo tshwm sim thaum lub noob germination. Ua ntej, lub hauv paus tseem ceeb tawm ntawm lub radicle thiab hlob mus rau hauv av. Nws pib absorbing dej thiab anchoring lub seedling rau hauv av. Tom qab ntawd qhov tua tshwm los ntawm plumule. Kev loj hlob ntawm plumule qhia tau hais tias tsis zoo geotropic zog. Nws yeej loj hlob ntawm cov av nto.
Daim duab 02: Seedling Emergence
Qhov tshwm sim ntawm kev tua thiab hauv paus tshwm sim vim kev faib cell thiab nthuav dav ntawm tes. Tom qab ntawd, kev tsim lub cev tshwm sim. Txog thaum nplooj tsim thiab pib photosynthesis, cov yub siv cov khoom noj uas khaws cia rau hauv lub embryo.
Dab tsi yog qhov zoo sib xws ntawm Kev Loj Hlob thiab Kev Tshaj Tawm?
- germination thiab tshwm sim yog ob txheej txheem ntsig txog cov noob.
- Kev tshwm sim tshwm sim thaum lub sij hawm noob germination.
- Lawv yog cov txheej txheem tseem ceeb tshwm sim hauv cov noob nroj tsuag.
- Tsis tas li ntawd, lawv yog ob theem yooj yim ntawm kev cog qoob loo.
Qhov txawv ntawm Kev Loj Hlob thiab Kev Tshaj Tawm yog dab tsi?
Kev cog qoob loo thiab kev tshwm sim yog ob txoj haujlwm tseem ceeb hauv kev cog qoob loo ntawm cov noob. Noob germination yog kev loj hlob ntawm ib tug noob rau hauv ib tug tshiab nroj tsuag thaum seedling tshwm sim yog kev loj hlob ntawm plumule ntawm cov av nto thiab tawm los ntawm cov av, ua ib tug tua. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm germination thiab tshwm sim.
Summary – Germination vs Emergence
Cov noob pib loj hlob thaum ib puag ncig tshwm sim. Lawv loj hlob mus rau hauv cov nroj tsuag tshiab, rhuav tshem lub dormancy. Qhov no yog txheej txheem hu ua noob germination. Thaum lub sij hawm noob germination, plumule hlob mus rau hauv av nto, qhia qhov tsis zoo geotropic zog, thiab tawm los ntawm cov av raws li ib tug yub. Qhov no yog txheej txheem hu ua seedling emergence. Qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm germination thiab tshwm sim.
