Cov kab mob ntawm cov nroj tsuag yog cov tsim tshwj xeeb uas ua haujlwm ntawm kev sib deev lossis kev sib deev. Thawj yog nqa tawm los ntawm paj, antheridia, archegonia, thib ob - los ntawm sporangia. Hauv tsab xov xwm luv luv no, peb yuav xyuam xim tshwj xeeb rau yav tom ntej. Yog li dab tsi yog sporangia?
Cov ntsiab lus dav dav
Sporangia yog multicellular (nyob rau hauv cov nroj tsuag siab dua) thiab unicellular (hauv algae) cov kab mob uas spores tsim. Koj puas tau pom cov pwm ntawm lub ncuav? Hauv nws, koj tuaj yeem paub qhov txawv me me dub dots, uas kuj yog sporangia. Ib qho sporangia no tuaj yeem muaj txog li 50 txhiab spores, txhua tus uas rov tsim dua mus txog ntau pua lab tus spores tshiab hauv ob peb hnub! Qhov no yog vim li cas pwm loj hlob sai heev.
Spores hauv sporangia zoo li cov pob me me uas npog lub plhaub. Sporangia ntawm horsetails, lycopsids, ferns tsim ntawm sporophylls thiab tuaj yeem sau tau hauv sori (pab pawg) lossis ua ib leeg.
Txhua fern tuaj yeem yogloj hlob los ntawm spores. Dab tsi yog fern sporangia? Muaj ob hom heterosporous fern zoo li sporangia: mega- thiab microsporangia, tsim mega- thiab microspores, los ntawm cov poj niam thiab txiv neej outgrowths yog tsim. Nyob rau hauv qab ntawm nplooj ntawm ib tug neeg laus cog, me me tubercles yuav pom, uas yog teem randomly, nyob rau hauv strokes los yog kab. Hauv cov ferns uas ploj lawm, lawv tau nyob ntawm qhov kawg ntawm cov ceg. Fern sporangia tej zaum yuav tsim ib tug banded ntug los yog ib tug tawv crust.
Rau kev yug me nyuam, sori tau sau nrog rau ib feem ntawm nplooj thiab muab tso rau hauv ib lub hnab ntawv, uas yog khaws cia rau hauv ib chav txias thiab qhuav. Koj tuaj yeem khaws cia rau hauv lub tub yees thiab qhib lub pob tsuas yog ua ntej sowing. Lub peev xwm ntawm spores ntawm ntau hom fern txawv heev, los ntawm ob peb hnub mus rau 20 xyoo. Spores rau sowing yog sib cais nyob rau hauv ib qho chaw tiv thaiv los ntawm drafts. Yog tsis qhib lub pob, koj yuav tsum khob nws, los ntawm qhov kev tsis sib haum xeeb yuav pib pw tsaug zog txaus. Yog tias qhov no tsis tshwm sim, ces tus sori yuav tsum tau muab tshem tawm nrog rab riam. Cov spores me me heev thiab zoo li xim av hmoov.
Mushroom reproduction
Kev sib deev ntawm cov nceb tshwm sim vim qhov tshwj xeeb spores uas tsim ntawm cov ceg tshwj xeeb ntawm mycelium. Spores tuaj yeem yog exogenous thiab endogenous. Dab tsi yog fungal sporangia? Cov no yog cov hlwb tshwj xeeb, uas tseem hu ua sporangiospores. Exogenous spores yog tsim nyob rau hauv lub cev hu ua conidiophores, thiab spores hu ua conidia. Cov fungi siab dua tsuas yog tsim los ntawm conidia, qis dua feem ntau los ntawm spores.
Sporangia yog tsim los ntawm sporangiophores. Cov no yog cov ceg tshwj xeeb ntawm mycelium, uas txawv los ntawm kev loj hlob tsawg, tuab dua thiab lwm yam nta.
Los ntawm txoj kev, pwm tso cov tshuaj lom hu ua mycotoxins, uas yog cov tshuaj lom uas muaj peev xwm ua rau tib neeg thiab tsiaj txhu. Txhawm rau ua qhov no, nws tsis tas yuav tsum noj cov ncuav mouldy lossis lwm yam zaub mov. Nws yog txaus los qhib lub hnab lossis qhib lub thawv nrog cov khoom noj pwm thiab tsis txhob nqus cov spores nrog huab cua lossis kov pwm.
Peb cia siab tias tam sim no koj nkag siab tias sporangia yog dab tsi thiab paub tias spores tau tsim nyob rau hauv lawv, nrog kev pab los ntawm cov nroj tsuag tsim dua tshiab. Qee zaum cov spores tuaj yeem ua rau lom.
