Qhov txawv ntawm tus kheej pollination thiab cross pollination yog tias tus kheej pollination yog kev tso cov paj ntoos ntawm ib lub paj rau ntawm lub stigma ntawm tib lub paj thaum hla pollination yog qhov tso ntawm paj ntoos ntawm lub paj ntawm stigma ntawm ib lub paj txawv ntawm tib tsob nroj lossis ib tsob ntoo sib txawv ntawm tib hom.
Pollination yog txheej txheem ntawm kev hloov paj paj ntoos los ntawm anther ntawm lub paj mus rau stigma ntawm paj. Nws yog ib qho tseem ceeb evolutionary ua tshwm sim nyob rau hauv cov nroj tsuag. Muaj ob hom pollination li cross pollination thiab self pollination. Self pollination tshwm sim ntawm anther thiab stigma ntawm tib lub paj thaum hla pollination tshwm sim ntawm anther ntawm ib lub paj thiab stigma ntawm lwm lub paj. Tsab xov xwm tham txog qhov sib txawv ntawm tus kheej pollination thiab cross pollination nyob rau hauv kom meej ntxiv.
Tus kheej pollination yog dab tsi?
Tus kheej pollination yog ib qho ntawm ob hom pollination uas cov paj noob hlis hloov ntawm anther mus rau stigma ntawm tib lub paj lossis los ntawm anther ntawm ib lub paj mus rau stigma ntawm lwm lub paj ntawm tib tsob nroj. Li no, tus kheej pollination tshwm sim ntawm ob lub qauv ntawm tib lub paj lossis tib tsob nroj. Cov nroj tsuag txhua xyoo xws li barley, peas, vetch, thiab txiv laum huab xeeb qhia tus kheej pollination.
Ntxiv mus, paj uas qhia tus kheej pollination muaj ntau yam hloov pauv kom nce tus kheej pollination thiab txo tus kheej pollination. Cov kev hloov pauv no txhim kho tus kheej pollination thiab tiv thaiv kom muaj feem cuam tshuam ntawm cov paj ntoo. Qee qhov kev hloov pauv muaj xws li cov kabmob kaw cov paj, tshwm sim ntawm pollination ua ntej lub paj qhib, muaj cov anthers nyob rau sab saum toj ntawm carpals ntawm paj, thiab lwm yam.
Daim duab 01: Tus kheej pollination
Ib qho zoo ntawm kev pollination tus kheej yog tias nws tsis xav tau pollinators, tsis zoo li hla pollination. Tab sis, tus kheej pollination tsis nyiam vim nws tsis ua rau muaj kev sib txawv ntawm cov nroj tsuag. Li no, tus kheej pollination tsis yog ib qho tseem ceeb evolutionary txheej txheem.
Cross Pollination yog dab tsi?
Cross pollination yog hom ntau tshaj plaws ntawm pollination hauv angiosperms vim nws ua rau muaj ntau haiv neeg ntawm cov nroj tsuag. Nws yog tus txheej txheem ntawm kev hloov pollens los ntawm anther mus rau stigma ntawm ib lub paj ntawm ib tug txawv nroj tsuag ntawm tib hom. Yog li ntawd, cross pollination tshwm sim ntawm ob nroj tsuag ntawm tib hom. Qhov tseem ceeb tshaj plaws, cross pollination tshwm sim nrog kev pab los ntawm pollinator. Kab yog cov pollinator nrov.
Daim duab 02: Hla Pollination
Tsis tas li ntawd, kev sib kis kab mob sib kis tau ua rau hla fertilization. Nyob rau hauv lem, hla fertilization tso cai gene ntws nyob rau hauv ib hom los tsim tshiab genetic ua ke thaum ua kom muaj ntau haiv neeg. Li no, cross pollination yog ib qho tseem ceeb evolutionary act.
Kev hloov pauv rau Kev sib hloov pauv hloov pauv
Cross pollinating paj qhia txawv hloov pauv. Feem ntau, lawv muaj xim zoo nkauj thiab tsis hnov tsw los nyiam pollinators. Qee cov nroj tsuag qhia tshwj xeeb ntawm kev hloov pauv rau kev sib hloov pollination. Ib qho kev hloov pauv yog unisexuality, uas yog muaj cov txiv neej thiab poj niam cov nroj tsuag sib txawv. Dichogamy yog lwm qhov kev hloov pauv. Ntawd yog, kev loj hlob ntawm gynoecium thiab androecium ntawm tib lub paj tshwm sim ntawm ob lub sijhawm sib txawv. Dimorphism yog lwm qhov kev hloov pauv. Ntawm no, qee cov paj muaj luv luv thiab stamens ntawm lub qhov ncauj ntawm corolla raj. Lwm cov paj muaj cov qauv ntev thiab cov anthers txuas rau lub raj corolla hauv qab lub qhov ncauj.
Cua pollinated paj kuj qhia qee qhov kev hloov pauv los txhim kho tus ntoo khaub lig pollination. Cov paj yog me me, tsis muaj xim, tsis muaj ntxhiab thiab tsis muaj nectar. Stigma yog loj thiab feathery. Nws yog nquag nce siab dua lwm qhov chaw. Pollen nplej yog me me, lub teeb thiab tsim nyob rau hauv coob. Lawv qhuav nrog du extine. Cov paj yog yooj yim. Lawv yug los ntawm cov stalks ntev kom lawv nce siab tshaj lwm qhov ntawm cov nroj tsuag. Cov anthers yog ntau yam. Kab-pollinated paj kuj qhia qee qhov kev hloov pauv los txhim kho tus ntoo khaub lig pollination. Lawv yog cov loj, ci ntsa iab, scented paj nrog nectar. Stigma yog me me thiab nplaum thaum anthers tsis muaj ntau yam. Pollen nplej yog loj thiab hnyav nrog ib tug ntxhib extine. Cov paj no qhia txog cov qauv tsim.
Dab tsi yog qhov zoo sib xws ntawm Self pollination thiab Cross pollination?
- Tus kheej pollination thiab cross pollination yog ob hom pollination uas tshwm sim hauv angiosperms.
- Lawv yog cov txheej txheem tseem ceeb hauv kev sib deev ntawm cov nroj tsuag.
- Nyob rau hauv ob txoj kev, paj ntoos hloov ntawm anthers mus rau stigma ntawm paj.
Dab tsi yog qhov txawv ntawm Self pollination thiab Cross pollination?
Tus kheej pollination yog tus txheej txheem ntawm kev hloov cov paj ntoos los ntawm anther mus rau stigma ntawm tib lub paj. Whereas, cross pollination yog tus txheej txheem ntawm kev hloov pollens los ntawm anther mus rau stigma ntawm ib lub paj ntawm ib tug txawv nroj tsuag ntawm tib hom. Yog li, qhov no yog qhov sib txawv ntawm tus kheej pollination thiab cross pollination. Tsis tas li ntawd, kev pollination tus kheej tsis tas yuav pollinating tus neeg sawv cev thaum hla pollination nyob ntawm tus neeg ua haujlwm pollinating. Yog li nws yog qhov sib txawv tseem ceeb ntawm tus kheej pollination thiab cross pollination.
Ntxiv mus, qhov sib txawv ntxiv ntawm tus kheej pollination thiab cross pollination yog tias tus kheej pollination tsawg dua hauv angiosperms thaum hla pollination tshwm sim hauv ¾ ntawm cov paj ntoo. Tsis tas li ntawd, kev pollination tus kheej tsis ua rau muaj kev sib txawv ntawm caj ces thaum hla pollination ua rau muaj ntau haiv neeg. Li no, tus kheej pollination txo cov gene pas thaum hla pollination tswj cov gene pas dej. Yog li qhov no yog qhov sib txawv tseem ceeb ntawm tus kheej pollination thiab cross pollination.
Summary – Self Pollination vs Hla Pollination
Pollination yog txheej txheem ntawm kev tso paj paj rau ntawm qhov qias neeg ntawm paj. Muaj ob lub ntsiab ntawm pollination: tus kheej pollination thiab cross pollination. Kev pollination tus kheej yog qhov tso ntawm paj ntoos ntawm ib lub paj rau ntawm lub stigma ntawm tib lub paj whereas cross pollination yog qhov tso ntawm paj ntoos ntawm ib lub paj rau ntawm stigma ntawm ib lub paj txawv ntawm tib cov nroj tsuag los yog cov nroj tsuag sib txawv ntawm tib hom. Yog li ntawd, tus kheej pollination yuav tsum muaj ib tsob nroj thaum hla pollination muaj ob hom nroj tsuag sib txawv ntawm tib hom. Yog li ntawd, qhov no yog qhov sib txawv tseem ceeb ntawm tus kheej pollination thiab cross pollination. Yog li ntawd, tus kheej pollination txo qhov kev sib txawv ntawm cov noob caj noob ces ntawm cov nroj tsuag thaum hla pollination ua rau muaj ntau haiv neeg. Tsis tas li ntawd, tus kheej pollination tsis yog evolutionary tseem ceeb thaum hla pollination yog ib qho tseem ceeb evolutionary txheej txheem. Yog li, qhov no qhia txog qhov sib txawv ntawm tus kheej pollination thiab cross pollination.
