Photo by Janice Glime. Cov protonema yog ib qho elongate, xov zoo li cov qauv uas tsim los ntawm cov germinated spore ntawm mosses thiab ib co liverworts. Nyob rau hauv feem ntau liverwort nws yog thalloid.
YPuas yog protonema muaj nyob rau hauv liverworts?
Cov protonema feem ntau yog cov xov zoo li thiab muaj ceg tawv heev hauv mosses tab sis txo qis rau ob peb lub hlwb hauv feem ntau cov kab mob siab thiab hornworts. Cov theem protonema hauv liverworts feem ntau yog hu ua sporeling hauv lwm cov bryophytes (saib hauv qab Daim Ntawv thiab kev ua haujlwm).
Nyob hauv chav kawm twg ntawm cov nroj tsuag yog protonema tsim?
Thaum cov moss thawj zaug loj hlob los ntawm cov kab mob, nws pib ua cov kab mob uas ua rau ntev thiab cov ceg ntoo mus rau hauv ib qho chaw filamentous hu ua protonema, uas txhim kho mus rau hauv nplooj gametophore, cov neeg laus daim ntawv ntawm gametophyte hauvbryophytes.
Protonema tsim tawm li cas?
Ib tug protonema yog tsim thaum ib moss los yog liverwort spore germinates. Nyob rau hauv mosses nws feem ntau muaj ntsuab, branching filaments; tab sis nws yog thalloid (ib daim ntawv tiaj tus lossis disc ntawm cov hlwb) hauv Sphagnum thiab Andreaea, piv txwv li, thiab hauv ntau lub cev.
YPuas yog protonema pom hauv Pteridophytes?
Diploid thiab pom muaj nyob rau hauv pteridophytes. D. Haploid thiab pom nyob rau hauv pteridophyte. Lus Cim: Daim ntawv gametophyte qhia ntau theem kev loj hlob xws li cov spore, protonema, thiab gametophore, uas ua rau cov kab mob sib deev.
