Papalua fertilization

Pollen mānoanoa ko e haule ana ma ka stigma o kekahi aoao ai kekahi, hoʻomaka e germinate. Ka palaoa ka mea e pehu ae, pollen şarkı ua hana mai ka vegetative keena. Pela, ke germination huli no. Ka iwi, mai hemo mai ma ka thinnest wahi o ka pollen Tube. Mai ka wēlau o ka Tube anao? Aou kūikawā waiwai. Ka mea, hoopalupalu mai fabrics kia ao a me ka stigma.

Ke nucleus o ka generative a me ka vegetative aeee kekahi, i loko o ka pollen Tube. Generative aeea i hookaawale ai a me konaʻano a mau sperm. Ma ka micropyle (i ka puka i loko o ka iwi) ovule pollen şarkı ua komo i loko o ka embryo sac. I loko o kaʻeke şarkı ua wāwahiʻia, a ninini aku la kona Contents.

A laila, kuʻi nukeliu ia lŘlŘ me ka sperm, mai kekahi hua. Penei, he zygote, a laila e hāʻawi ana e hoomaka ana ka hua embryo. Together me keia lua merge me ke kikowaena nucleus o ka sperm. Ua hiki aku i ke kahua o ka triploid nucleus ape hope ma ka triploid endosperm, i mea 'aʻole ka haumāna.

A pau na luna kaʻina ua kapaʻia he "papalua fertilization ma flowering mea kanu."

Antipodes a me synergids (Polar nuclei i loko o ka embryo sac) ma hope o ka pau 'ana o ke kaʻina hana i ka pono, a me ka integuments (veils) hana i ka hua kapa.

Papalua fertilization i ka mea kanu i ike ia ma ka Lūkini nä känaka 'epekema S. Navashin.

I loko o kēia kaʻina hana, ka nucleus i loko o ka embryonic sac mea nui nui nui ma mua o ka sperm nucleus, a ua kauoha aku e loaa ka interphase mua (waena pae). Ma keia kulana a me kinona o ka nuclei o ka embryo sac e ĸokoĸa ana nä pane. No ka laʻana, kekahi Asteraceae ka mea, i ke elongated, kekahi manawa tortuous, ai 'nucleoli. Nui, e hōʻike sperm i loko o ka palapala o ua hoʻokōʻia interphase nuclei me nucleoli, ma kekahi hihia, ua ole Akä naÿe i ka 'ole o ka wahine nuclei.

Menina fertilization hiki ia i mau hoailona ia mea, ke kaumaha ma muli o ka 'ano o ka hui ana o ke kane a me ka wahine nuclei.

Ke'ī mai, i ka wa a ke kaʻina ia lŘlŘ premitotic kaiapuni sperm nuclei i loko o ka wahine kāna mau 'ōlelo, ma ka despiralization (unwinding) chromosomes. Ma keia hoao ana e puhi ia nā chromosomes ma interphase nuclei hanaia.

Postmitotic papalua fertilization mea he komo ana o ke kane a me ka wahine nuclei, mālama a hoʻolilo 'iwi ma prophase, i welau a lākou ē aʻe. Education interphase nuclei, i pihaʻi me chromosome e puhi ia, ke hele mai ma hope, e kahua o ka mua mitotic mahele i loko o ka zygote.

I ka papalua fertilization ia lŘlŘ i loko o ka hua manu aeea kuʻi nukeliu o elua haploid (i loaʻa ka hapalua o ka helu ana o chromosomes) Kora naʻEsau, nae diploid zygote nucleus (me ka piha 'ia paha o nā chromosomes).

Ke kaumaha ma muli o ka helu o Polar nuclei na i loko o ka kikowaena halepaahao ua hana chromosome helu o ka endosperm nuclei.

Menina fertilization paipai 'ia ka hōʻike' ia nei 'ano maʻamau i loko o ka endosperm o na anoano (hapalua) kanu endosperm mai o ka makua kāne. Me ka anal o ka embryo sac mau pollen paipu, ke kaʻina komo ai sperm, mai ka Tube mua, i loko o nā paipu sperm lālā. Menina fertilization e mau spermatozoa ka'āina pohihihi keia.

Ma embryological mau hoʻokolokolo 'ana i ka hoʻohana' elele o kekahi mau angiosperms (Compositae, Ranunculaceae, Liliaceae) Navashin mea kalaima endosperm i ho'āʻo ai i ka embryo i moe kaʻina hana ma ka flowering mea kanu. O kŰia ano wale no ka poeikohoia o ka angiosperms flora.

It E e hoʻomaopopo i ka hana Navashin ae e möakäka hou i ka ninau o ke kumu o ka endosperm. Nā mea hoʻomaoe o nā haʻina o ka nä känaka 'epekema i ua hou ia ke kino.