Qhov Tseem Ceeb Qhov txawv - Protonema vs Prothallus
Bryophytes thiab Pteridophytes yog cov nroj tsuag tsis muaj hlab ntsha thiab vascular. Vascular nroj tsuag muaj xylem thiab phloem rau kev thauj mus los ntawm lawv cov as-ham. Yog li ntawd, bryophytes thiab pteridophytes txawv nyob rau hauv ntau txoj kev nrog rau lawv lub neej voj voog. Hauv Bryophyte lub neej voj voog, theem tseem ceeb yog gametophyte, thiab hauv pteridophytes, theem tseem ceeb yog sporophyte. Protonema thiab Prothallus yog ob hom gametophytes ntawm bryophytes 'thiab pteridophytes' lub neej voj voog. Lub protonema yog ib tug filamentous threadlike qauv thaum lub prothallus yog ib lub plawv zoo li tus qauv nrog ntau rhizoids hauv qab nws thiab muaj ob leeg poj niam thiab txiv neej cov me nyuam. Qhov no yog qhov sib txawv tseem ceeb ntawm protonema thiab prothallus.
YProtonema yog dab tsi?
Nyob rau hauv cov ntsiab lus ntawm mosses thiab liverworts lub neej voj voog, cov protonema yog ib qho qauv uas zoo nkaus li cov xov uas tsim thaum lub sij hawm ntxov heev. Protonema tshwm sim thaum pib ntawm moss kev loj hlob tom qab spores germination. Tom qab ntawd dhau los ntawm cov theem sib txawv ntawm qhov sib txawv, cov protonema loj hlob mus rau hauv nplooj nplooj uas hu ua gametophores. Protonema yog ib qho algal zoo li filamentous qauv. Nws yog ib tug yam ntxwv feature ntawm tag nrho cov mosses thiab ntau ntawm liverworts. Hauv hornworts (ib hom liverworts) theem protonema tsis tuaj, thiab nws tau suav tias yog ib qho tshwj xeeb nrog kev txiav txim siab rau liverworts.
Protonema sawv cev rau gametophyte ib txwm. Protonema tsim los ntawm apical cell faib. Nyob rau theem tshwj xeeb ntawm lub voj voog txoj kev loj hlob no, phytohormone cytokinin cuam tshuam lub budding ntawm peb lub ntsej muag apical hlwb. Cov buds thaum kawg ua gametophores. Cov gametophores yog cov qauv uas ua rau cov stems thiab nplooj ntawm bryophytes vim lawv tsis muaj tseeb stems thiab nplooj tiag.
Daim duab 01: Cov qauv ntawm Protonema
Cov protonema feem ntau yog tsim los ntawm ob hom hlwb. Lawv yog, chloronemata thiab caulonemata. Cov chloronemata tsim thaum lub sij hawm thaum ntxov ntawm germination uas yog ces sib txawv thiab tsim mus rau hauv caulonemata.
Prothallus yog dab tsi?
Prothallus yog theem gametophyte tshwm nyob rau hauv lub neej voj voog ntawm ferns thiab lwm yam pteridophytes. Nws yog ib lub plawv zoo li tus qauv uas tsim los ntawm germination ntawm ib tug spore. Lub plawv zoo li tus qauv no yog cov yam ntxwv ntawm pteridophytes lub neej voj voog. Prothallus muaj luv luv lifespan. Hais txog nws qhov ntev, lub prothallus yog 2 mm - 5 mm dav. Nws yog tsim los ntawm ob qho tib si txiv neej thiab poj niam cev xeeb tub uas yog antheridium thiab archegonium. Hauv qab gametophytes, cov qauv hauv paus zoo li lub npe hu ua rhizoids tau loj hlob.
Cov qauv ntawm cov prothallus tuaj yeem sib txawv raws li hom hom. Tab sis qhov kev hloov pauv yog feeb thiab tsis sib txawv los ntawm cov qauv prothallus ib txwm muaj. Hauv qee hom pteridophytes, prothallus muaj chlorophylls uas ua rau nws mus rau photosynthesis. Los ntawm photosynthesis, cov khoom noj khoom haus xav tau ntawm prothallus tau ua tiav. Cov tsiaj uas tsis muaj chlorophyll thiab tsis tuaj yeem ua rau photosynthesis, ua kom tiav lawv cov khoom noj khoom haus los ntawm kev pab ntawm rhizoids thiab ua raws li ib txwm saprotrophs.
Daim duab 02: Tus qauv ntawm Prothallus
Tus prothallus yog tsim los ntawm kev hloov ntawm tiam los ntawm sporophyte uas tsim cov spores haploid. Haploid spores ces germinate los ntawm mitotic division rau hauv prothallus. Tom qab ntawd tus prothallus ua rau muaj kev ywj pheej rau ob peb lub lis piam thiab txhim kho antheridia thiab archegonia uas tsim cov phev flagellated thiab ova raws li. Cov phev motile (haploid) sib sau ua ke nrog ova (haploid) los ntawm txoj kev fertilization. Ib tug diploid zygote tsim raws li fertilization. Lub zygote ces faib thiab tsim mus rau hauv ib tug multicellular sporophyte. Cov sporophyte loj hlob tawm ntawm prothallus hauv kev tshawb nrhiav dej thiab khoom noj khoom haus thiab txhim kho mus rau ib tus neeg fern.
Qhov Zoo sib xws ntawm Protonema thiab Prothallus yog dab tsi?
- Ob leeg yog gametophytes.
- Spore germination tsim ob qho tib si protonema thiab prothallus.
Qhov txawv ntawm Protonema thiab Prothallus yog dab tsi?
YProtonema vs Prothallus |
|
| Protonema yog cov qauv filamentous, uas yog thalloid thiab belongs rau gametophyte ntawm mosses thiab qee pawg ntawm liverworts. | Prothallus yog gametophyte ntawm pteridophytes. |
| Protonema muaj xov zoo li lub cev. | Prothallus yog lub plawv zoo li tus. |
| Protonema txhim kho mus rau gametophores uas yog nplooj nplooj. | Prothallus loj hlob mus rau txiv neej thiab poj niam cev xeeb tub. |
Summary – Protonema vs Prothallus
Protonema yog cov qauv uas zoo li cov xov. Lawv raug tsim thaum lub sij hawm ntxov haploid. Tom qab ntawd dhau los ntawm cov theem sib txawv ntawm qhov sib txawv, cov protonema loj hlob mus rau hauv nplooj nplooj uas hu ua gametophores. Nws yog ib tug yam ntxwv feature ntawm tag nrho cov mosses thiab ntau ntawm liverworts tshwj tsis yog nyob rau hauv hornworts. Lub protonema feem ntau yog tsim los ntawm ob hom hlwb; chloronemata thiab caulonemata. Prothallus yog theem gametophyte ntawm lub neej voj voog ntawm ferns thiab lwm yam pteridophytes. Nws yog lub plawv zoo li tus qauv. Prothallus tsim los ntawm germination ntawm ib tug spore. Nws yog tsim los ntawm ob qho tib si txiv neej thiab poj niam cev xeeb tub uas yog antheridium thiab archegonium. Hauv qee hom pteridophytes, chlorophyll muaj nyob rau hauv prothallus thiab muaj peev xwm ntawm photosynthesis. Qhov no yog qhov txawv ntawm protonema thiab prothallus.
Download PDF Version ntawm Protonema vs Prothallus
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Protenema thiab Prothallus
