Cov integuments loj hlob mus rau cov noob tsho tiv no thaum lub ovule matures tom qab fertilization. Cov integuments tsis nyob rau hauv lub nucellus kiag li tab sis khaws qhov qhib ntawm lub apex hu ua micropyle. Qhov qhib micropyle tso cai rau paj ntoos (tus txiv neej gametophyte) nkag mus rau hauv lub ovule rau fertilization.
Dab tsi yog tsim los ntawm sab nraud integument?
Kev daws: Tom qab txheej txheem fertilization, cov hlwb sib txawv hauv lub hnab embryo tsim los tsim ntau qhov chaw ntawm lub embryo. Piv txwv li, sab nrauv integument forms testa, inner integument forms tegmen thiab zes qe menyuam cov ntaub ntawv pericarp.
Yuav ua li cas rau sab nraud integument tom qab fertilization?
Tom qab fertilization, cov integuments no muab nce mus rau lub tsho tiv no noob, uas nyob rau hauv angiosperms muaj xws li ib tug testa thiab ib tug tegmen, muab los ntawm sab nrauv thiab sab hauv integuments, feem.
Qhov twg ntawm ovule hloov mus rau hauv cov noob?
Tom qab fertilization, ovule dhau los ua cov noob. Ntawm qhov chaw ntawm ovule tig mus rau hauv lub tsho loj.
Qhov twg hauv qab no yog qhov kev sib txuas sab nraud ntawm ovule tsim mus rau hauv testa?
Teb: Tom qab fertilization hauv paj, ovule tau hloov mus rau hauv cov noob. Sab nraud integument ntawm ovule dhau los ua Testa thiab sab hauv integument ua Tagmen.
