Qhov sib txawv tseem ceeb ntawm endosperm thiab perisperm yog qhov endosperm yog cov khoom noj khoom haus ntawm cov noob uas yog triploid hauv xwm, thaum perisperm yog lwm cov ntaub so ntswg ntawm cov noob uas yog diploid hauv xwm.
Cov noob nroj tsuag muaj ob pawg loj xws li angiosperms thiab gymnosperms. Angiosperms dais kaw cov noob thaum gymnosperms dais cov noob liab qab. Cov noob yog fertilized ovule ntawm cov noob nroj tsuag uas germinates thiab loj hlob mus rau hauv ib tug tshiab nroj tsuag. Yog li, nws muaj qhov tsim embryo. Muaj ob cov ntaub so ntswg hauv cov noob ntawm cov nroj tsuag siab dua. Lawv yog cov endosperm thiab perisperm. Endosperm tshwm sim los ntawm ob npaug rau fertilization nyob rau hauv flowering nroj tsuag vim ib qho kev tshwm sim hu ua triple fusion. Nws muaj cov kab mob triploid. Ntawm qhov tod tes, perisperm originates los ntawm lub nucellus, thiab nws muaj diploid hlwb.
Endosperm yog dab tsi?
Lub endosperm yog cov khoom noj khoom haus tseem ceeb ntawm cov noob ntawm cov paj ntoo. Nws ncig lub embryo tsim thiab nourishes nrog zaub mov, feem ntau nyob rau hauv daim ntawv ntawm starch. Ntxiv nrog rau cov hmoov txhuv nplej siab, endosperm tseem muaj roj thiab cov proteins. Tsis tas li ntawd, endosperm tsim los ntawm triple fusion nyob rau hauv uas ib tug phev nucleus fuses nrog ib tug binucleate central cell ntawm lub embryo sac. Yog li ntawd, nws yog triploid nyob rau hauv cov xwm. Lub endosperm feem ntau yog luv luv nyob rau hauv ntau cov nroj tsuag vim nws tau noj los ntawm kev loj hlob embryo. Txawm li cas los xij, hauv cov noob endospermic, endosperm tseem nyob rau lub sijhawm ntev.
Daim duab 01: Endosperm
Txawm li cas los xij, qee cov noob cog tsis muaj endosperms. Hauv cov nroj tsuag, perisperm ua haujlwm raws li cov ntaub so ntswg. Hauv cov nplej, cov khoom noj muaj txiaj ntsig tshaj plaws yog cov noob uas muaj cov endosperm. Yog li ntawd, cereals yog ib qho khoom noj zoo rau tib neeg thiab tsiaj txhu. Txiv maj phaub muaj kua endosperm uas muaj cov tshuaj loj hlob.
Perisperm yog dab tsi?
Perisperm yog lwm hom ntaub so ntswg uas muaj nyob hauv cov noob ntawm ntau tsev neeg cog. Nws tsim los ntawm nucellus. Yog li ntawd, nws yog purely ntawm leej niam keeb kwm thiab yog diploid nyob rau hauv cov xwm. Perisperm ncig lub endosperm ntawm cov noob. Yog li, endosperm absorbs as-ham los ntawm perisperm.
Daim duab 02: Perisperm
Perisperm yog qhuav, tsis zoo li endosperm. Nws feem ntau muaj cov hmoov txhuv nplej siab. Tab sis, nws tsis muaj cov proteins, tsis zoo li endosperm.
Dab tsi yog qhov zoo sib xws ntawm Endosperm thiab Perisperm?
- Ob leeg endosperm thiab perisperm yog cov khoom noj khoom haus uas muaj nyob hauv cov noob.
- Lawv muaj nyob rau hauv angiosperms.
- Kuj, ob leeg muaj cov hmoov txhuv nplej siab.
- Lawv txhim kho sib npaug.
- Ntxiv mus, ob qho tib si muaj cov niam txiv.
- Tsis tas li ntawd, lawv muab khoom noj rau cov embryo tsim.
Qhov txawv ntawm Endosperm thiab Perisperm yog dab tsi?
Lub endosperm yog cov khoom noj khaws cia hauv cov noob uas yog triploid hauv qhov xwm txheej. Ntawm qhov tod tes, perisperm yog lwm daim ntawv ntawm cov ntaub so ntswg hauv cov noob ntawm qee tsev neeg cog. Nws yog muab los ntawm lub nucellus thiab yog diploid nyob rau hauv cov xwm. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm endosperm thiab perisperm. Tsis tas li ntawd, endosperm ncig lub embryo thaum perisperm ncig lub endosperm. Yog li, peb tuaj yeem xav txog qhov no kuj yog qhov sib txawv ntawm endosperm thiab perisperm.
Ntxiv mus, qhov endosperm yog mos, feem ntau, thaum lub perisperm qhuav. Yog li, qhov no kuj yog qhov txawv ntawm endosperm thiab perisperm.
Cov hauv qab no qhia ntau ntxiv txog qhov sib txawv ntawm endosperm thiab perisperm.
Summary – Endosperm vs Perisperm
Endosperm thiab perisperm yog ob daim ntaub so ntswg hauv cov noob. Tab sis, lub endosperm yog triploid nyob rau hauv cov xwm thaum perisperm yog diploid nyob rau hauv qhov. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm endosperm thiab perisperm. Ob leeg endosperm thiab perisperm muaj cov hmoov txhuv nplej siab. Tab sis, endosperm muaj cov proteins thiab. Txawm li cas los xij, perisperm tsis muaj cov proteins. Tsis tas li ntawd, endosperm tsim los ntawm triple fusion thaum perisperm tsim los ntawm nucellus. Tsis tas li ntawd, endosperm muaj ob qho tib si niam thiab txiv, thaum perisperm yog leej niam nkaus xwb. Yog li, qhov no qhia txog qhov sib txawv ntawm endosperm thiab perisperm.
