Qhov sib txawv tseem ceeb ntawm thallus thiab prothallus yog tias thallus yog ib qho tsis txawv ntawm filamentous gametophyte ntawm algae, fungi, lichens, thiab qee lub cev thaum prothallus yog lub plawv zoo li gametophyte ntawm pteridophytes xws li qws mosses, horsetails, thiab ferns.
Thallus yog lub cev tsis sib txawv ntawm cov nroj tsuag uas muaj nyob hauv algae, fungi, lichens, thiab qee lub siab. Prothallus, nyob rau hauv sib piv, yog lub plawv zoo li lub plawv zoo li tus qauv tam sim no nyob rau hauv ferns. Ob lub qauv tsis sib txawv rau hauv paus, qia los yog nplooj. Hauv prothallus, antheridia thiab archegonia muaj nyob. Yog li ntawd, lawv tsuas yog yug me nyuam xwb. Cov kabmob tshwj xeeb no tsis muaj nyob hauv thallus.
Thallus yog dab tsi?
Thallus yog cov nroj tsuag tsis sib txawv uas feem ntau pom hauv algae. Yog li ntawd, thallus tsis muaj keeb kwm, qia, thiab nplooj. Sib nrug los ntawm algae, thallus tuaj yeem pom hauv cov fungi, qee cov kab mob siab, thiab lichens. Lub fungal thallus yog mycelium. Txawm li cas los xij, hauv lichens, thallus yog lub cev vegetative.
Daim duab 01: Thallus
Thallus yog gametophyte. Nws tuaj yeem yog unicellular lossis multicellular. Tsis tas li ntawd, gametophyte reproduces ob leeg deev thiab asexually. Nws tsis muaj cov kab mob tshwj xeeb ntawm kev sib deev antheridia thiab archegonia. Txawm hais tias lub thallus tsis txawv ntawm qhov kev xav ntawm lub cev, nws muaj peev xwm saib xyuas qhov pom thiab ua haujlwm sib txawv. Piv txwv li, xim av algae muaj ib tug thallus muab faib ua peb cheeb tsam: tuav ceev, stipe thiab hniav. Lub stipe txhawb nqa cov hniav, thiab cov hniav nqa tawm photosynthesis.
Prothallus yog dab tsi?
Prothallus yog lub plawv zoo li gametophyte tam sim no hauv pteridophytes. Nws yog 2-5 hli dav photosynthetic qauv. Prothallus txuas nrog cov av nrog kev pab los ntawm rhizoids. Ferns tau hloov pauv ntawm tiam thaum lub neej voj voog. Nws yog qhov hloov pauv ntawm diploid thiab haploid theem ntawm pteridophyte lub neej voj voog.
Daim duab 02: Prothallus
Lub diploid sporophyte yog theem tseem ceeb. Nws tsim spores hauv qab thiab ua rau cov gametophyte uas yog prothallus. Prothallus yog ib tug multicellular qauv. Nws muaj ob qho tib si antheridia thiab archegonia. Li no, nws reproduces kev sib deev. Antheridia tsim gametes. Cov gametes no ua luam dej ntawm lub ov nyob rau hauv archegonia rau fertilization.
Dab tsi zoo sib xws ntawm Thallus thiab Prothallus?
- Ob leeg thallus thiab prothallus tsis txawv rau hauv paus, qia los yog nplooj.
- Ntxiv mus, ob qho tib si yog cov txheej txheem photosynthetic.
- Dhau li ntawd, lawv tsim gametes rau kev sib deev.
- Kuj, ob leeg yog gametophytes.
Qhov txawv ntawm Thallus thiab Prothallus yog dab tsi?
Thallus thiab prothallus yog cov qauv tsis sib xws. Thallus yog cov qauv filamentous thaum prothallus yog lub plawv zoo li thallus zoo li lub cev. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm thallus thiab prothallus. Ntxiv mus, txawm hais tias ob leeg yog gametophytes, thallus reproduces ob leeg kev sib deev thiab asexually, tab sis prothallus tsuas yog undergoes kev sib deev. Yog li, qhov no kuj yog qhov txawv ntawm thallus thiab prothallus.
Tsis tas li ntawd, antheridia thiab archegonia, uas yog cov kabmob tshwj xeeb, muaj nyob hauv prothallus. Tab sis tsis muaj lub cev zoo li no muaj nyob hauv thallus. Yog li, qhov no yog lwm qhov sib txawv ntawm thallus thiab prothallus. Tsis tas li ntawd, qhov sib txawv ntxiv ntawm thallus thiab prothallus yog tias thallus yog unicellular lossis multicellular, tab sis prothallus tsuas yog multicellular. Tsis tas li ntawd, algae, fungi, liverworts, thiab lichens muaj cov qauv zoo li thallus thaum pteridophytes xws li ferns, clubmosses, thiab horsetails muaj prothallus.
Hauv qab cov ntaub ntawv-daim duab piav qhia ntxiv txog qhov sib txawv ntawm thallus thiab prothallus.
Summary – Thallus and Prothallus
Thallus thiab prothallus yog cov qauv tsis sib xws uas cov hauv paus hniav, stems lossis nplooj tsis tuaj. Ntxiv mus, lawv yog photosynthetic gametophytes. Thallus yog cov qauv filamentous uas peb tuaj yeem pom hauv algae, fungi, liverworts, thiab lichens; lawv yug los ntawm kev sib deev thiab asexually. Ntawm qhov tod tes, prothallus yog lub plawv zoo li tus qauv ntawm pteridophytes. Tsis tas li ntawd, prothallus yog multicellular. Tawm ntawm ob lub qauv no, tsuas yog cov prothallus muaj antheridia thiab archegonia rau kev sib deev; Txawm li cas los xij, cov kab mob sib deev tsis muaj nyob hauv thallus. Yog li, qhov no qhia txog qhov sib txawv ntawm thallus thiab prothallus.
