Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?
Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?

Video: Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?

Video: Yuav ua li cas fertilization daim nyias nyias nyob hauv hiav txwv urchins?
Video: sawv daws noj ib pluas tshais ua ke nyias yuav mus nyias tsev nawb 2024, Lub rau hli ntuj
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Cov hiav txwv urchin fertilization hnab ntawv (FE) yog tsim tom qab thawj zaug phev-qe cuam tshuam los ntawm lub qe nto vitelline lub hnab ntawv (VE) thiab cov protein paracrystalline feem (PCF), muab tau los ntawm cov noob qoob loo.

Ib yam li ib tus tuaj yeem nug, lub hom phiaj ntawm lub hnab ntim fertilization hauv hiav txwv urchins yog dab tsi?

Hauv hiav txwv urchin, cov ntsiab lus ntawm cov pob zeb cortical tau zais tsis pub dhau 30 vib nas this ntawm kev sib deev. Ob peb ntawm cov ntsiab lus protein no khi rau txheej txheej vitelline pib ntawm qe thiab nqa tawm ntawm cov xovtooj ntawm tes los tsim kom ruaj khov, tsis tuaj yeem, lub hnab ntim cov chiv.

Qhov thib ob, ua li cas cov qe ntses hiav txwv sau? Qe thiab phev ntawm dej hiav txwv yog sau los ntawm kev txhaj tshuaj 0.15 ml/nti ntawm qhov dav ntawm 0.55 M KCl nrog rab koob me me li sai tau (25 ntsuas los yog li ntawd) rab koob nkag rau hauv lub cev kab noj hniav ntawm qhov sib txawv ntawm cov ntsiab lus sib txawv hauv peristome (cov mos mos nyob ib puag ncig lub qhov ncauj kab noj hniav).

Ntev npaum li cas hiav txwv urchin fertilization siv?

Cov xim colloidal number ua tsis nkag mus rau lub tsho tiv no jelly. Cov qe yog 80 inm txoj kab uas hla. ntim rau hauv dej khov, cov phev yuav muaj peev xwm ua tau fertilization rau 4 hnub. Dej hiav txwv spermatozoa (phev) yog cov hlwb me me uas nchuav tawm ntawm tus txiv neej gonopores tom qab txhaj tshuaj 0.5M KCl.

Qhov tseem ceeb ntawm lub hnab ntawv fertilization yog dab tsi?

Raws li cov lub hnab ntawv fertilization nce, cov phev tsis-fertilizing raug tshem tawm ntawm cov qe ntshav daim nyias nyias , thiab raws li lawv tsis tuaj yeem hla dhau lub hnab ntawv fertilization , lawv raug tiv thaiv kom tsis txhob nkag mus rau hauv lub qe. Yog li ntawd, cov tshuaj tiv thaiv kab mob tiv thaiv kab mob polyspermic fertilization , kev tshwm sim tuag taus

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