He aha te mea te gametophyte (momo, āhuatanga, ngā āhuatanga)

Katoa rauropi ora haere i roto i te tetahi huringa ora: i haputanga (tohuwāhi) ki te mate (te mate), a kahore he te whakato he okotahi. Ratou āhuatanga ko te tukanga reproduction e tauutuutu e sporophyte me gametophyte.

Na e te aha i te gametophyte - tātari i roto i te taipitopito ake i roto i tenei tuhinga. kia mea te reira e kore te tino maha taratahi te gametophyte, a reira, tahi me sporophytes ranei tika tei runga te reira.

He aha te mea te gametophyte?

Ko te wā "gametophyte" ahu te i te kupu Kariki mo te "gamete", arā. E. pūtau Reproductive me phyton (tipu) me whakawhiti i rite whakatupuranga takoto tetahi o te wāhanga o te whanaketanga tipu ranei. I roto i te koiora, te whakatupuranga iroriki haploid he ti'araa reta - «n».

momo

Hei matau e ko tika te gametophyte ki te mārama me pēhea te hanga e te reira me e ko. Ko te Gametophyte he āhuatanga motuhake characterizing nga otaota no ki te piha o te spore teitei. Tei runga i te pārōnaki i roto i te gametophyte kia whakawhanake gametangia (whekau generative aitanga o) o rua momo: tane me te wahine.

Āhuatanga tupuranga

Ko te tukanga katoa o te aitanga i roto i ngā tipu kei roto i te puka o te conjugation (ie. E. rua motuhake pūtau protoplast hononga vegetative). E mea pinepine tetahi me te takitahi ano e taea te wā kotahi whakawhanake e rua tohuhema pua ranei. Ko reira he take ina e whakawhanake i te tautohetohe tetahi tika momo, me tohuhema anake i runga i te tahi atu. Takitahi, e whanake pua, ka karanga te sporophyte, me te tetahi i runga i nei tohuhema e hanga e - gametophyte.

Gametophyte i roto i ngā tipu

He taera rua, me te takatāpui Gametophyte. I roto i te karihi diploid sporophyte to ratou he huinga pūira, engari i haploid ratou gametophyte. nuinga rawa o tino pükohu, me te tata katoa tipu teitei whai he tauira motuhake i roto i te whanaketanga taiāwhio me whakarerekētanga o whakatupuranga, e kua tāruatia asexually me moepuku.

Schematically, e taea te māngai te tukanga tupuranga e whai ake: gametophyte → → hanga o gamete hononga o tohuhema kākano hanganga → → → whanaketanga o te sporophyte diploid, me te pera i runga i.

Ko te tino kanorau hanganga Gametophyte, me tenei, tei runga i te momo o te huringa whakatupuranga atu momo o te tipu te hunga ranei. Hei tauira, kitea te pükohu te whakarerekētanga i tuhia ai o whakatupuranga (isomorphic), na gametophyte kanohi ratou he kōwae motuhake, i te mea motuhake, me te e kore e rerekē i te sporophyte kotahi.

Na konei i te pükohu laminaria, e whai he (heteromorphic) huringa whanaketanga motuhake, he tino rerekē te gametophyte, rerekē i te sporophyte, he hanganga i roto i te puka o raro-whakawhanakehia, ka branched thalli filamentous. Tata ki te katoa māngai o sporophytes, tae atu i te aruhe, e underdeveloped te gametophyte me i reira ko te wa poto rawa.

Nā ki te meka i roto i te akoranga o te kunenga mai i roto i ngā tipu o te akomanga runga i reira ko tetahi whakaiti maeneene o te gametophyte, kua ngaro ratou ratou tuakiri fakasekisualé. Hei tauira, otaota uri tino ngaro whakatupuranga o nga wahine, me ngā wāhanga katoa o te whanaketanga puta ratou i runga i te sporophyte.

gametophyte Wahine gymnosperms kanohi endosperm haploid multicellular archegonia atu rite rimu atu gymnosperms aua ranei ranei. I roto i te māngai ravnosporovyh he o tane e rua prothallia otaota aruhe.

Toa otaota uri gametophyte kua te ahua o te hae, me te putake mai i microspores i hanga tohuhema i germinating hae ngongo. Ko prothallia ravnosporovyh aruhe - taera rua.

Ko te kupu, e kore te mea ti'aturi i runga i te wā o te otaota tipu ranei te ora, me te anake o tona momo me te āhuatanga whanaketanga te gametophyte.

mutunga

Ko te kupu, ko te gametophyte, he whakatupuranga puremu i roto i te whanaketanga tipu me te characterizing whakarerekētanga motuhake, me te raupapa o whakatupuranga i roto i tona ahua, He maha ngā āhuatanga. Tuatahi o te katoa, kua hanga e te reira i te tautohe kua he huinga haploid o pūira me tohuhema tonu ngā ahakoa o ahakoa ko reira he motuhake whēkau sex pūtau noa vegetative ranei.

Na e matau ana koutou ki ta te gametophyte me aha e ona āhuatanga.