Spore vs Endospore
Spore
Nyob ntawm ntau hom spores ib tsob nroj tuaj yeem ua homosporous lossis heterosporous. Yog hais tias cov nroj tsuag tsuas muaj ib hom spores, nws yog hu ua homospory. Yog hais tias cov nroj tsuag muaj ob hom spores, txiv neej thiab poj niam spores, nws yog hu ua heterospory. Txiv neej spores hu ua microspores thiab poj niam spores hu ua megaspores. Micro spores tseem hu ua paj ntoos nplej.
Hauv cov paj ntoo, microspores pom nyob rau hauv lub hnab paj ntoos los yog microsporangium. Microspores yog me me heev, cov txheej txheem feeb. Lawv yuav luag zoo li hmoov av. Txhua microspore muaj ib lub cell thiab ob lub tsho loj. Lub tsho loj tshaj plaws yog lub extine, thiab sab hauv yog lub intine. Extine yog ib txheej tawv, cutinized txheej. Feem ntau nws muaj spinous outgrowths. Qee lub sij hawm nws tuaj yeem ua tau zoo, thiab. Lub intine yog du thiab nyias heev. Nws yog tsuas yog ua los ntawm cellulose. Lub extine muaj ib lossis ntau qhov chaw nyias uas hu ua cov kab mob pores los ntawm qhov intine loj hlob tawm los ua lub paj paj noob hlis. Lub raj paj ntoos elongates los ntawm cov ntaub so ntswg gynoecium nqa ob tug txiv neej gametes hauv nws.
Nyob hauv paj ntoo, megaspore niam cell faib meiotically tsim ib tetrad ntawm plaub megaspores nyob rau hauv uas lub Upper peb megaspores degenerate.
Endospore
Qee cov kab mob tsim cov kab mob endospores. Bacillus thiab Clostridium yog endospore tsim cov kab mob. Cov txheej txheem ntawm kev tsim cov kab mob hu ua sporulation. Spores tsim nyob rau hauv cov kab mob cell hu ua endogenous spores. Spores yog cov hlwb sib txawv.
Endospores tuaj yeem muaj sia nyob tau ntau lab xyoo. Cov kab mob endospore yog ib qho kev khiav tawm ntawm cov kab mob DNA. Cov no yog cov qauv kev ciaj sia. Cov no tsis yog cov qauv kev ua me nyuam. 10 generas ntawm endospore tsim Gram zoo bacilli thiab cocci paub txog uas muaj ntau yam kab mob. Cov no tuaj yeem txheeb xyuas los ntawm staining.
Spore tsim pab hauv kev faib cov kab mob. Qhov chaw ntawm endospore nyob rau hauv niam cell txawv, thiab nws tuaj yeem yog davhlau ya nyob twg, sub terminal lossis nruab nrab. Thaum lub sij hawm spores tsim tsub zuj zuj ntawm calcium ions, synthesis ntawm dipicolinic acid thiab me me acid soluble spore proteins tshwm sim. Lub cortex tuab yog tsim nyob ib ncig ntawm lub protoplast. Lub cev qhuav dej ntawm protoplast yuav siv qhov chaw uas txo cov dej. Vim cov dej tsis muaj dej, cov enzymes ua haujlwm tsis zoo. Cov tseem ceeb cov proteins nruj nreem khi nrog DNA thiab tiv thaiv nws los ntawm kev puas tsuaj los ntawm UV thiab tiv thaiv nws los ntawm desiccation thiab qhuav tshav kub. Nws ua raws li cov pa roj carbon thiab lub zog rau kev loj hlob ntawm tes tshiab.
Kev tsim ntawm endospore yog raws li hauv qab no. Vegetative cell nres kev loj hlob. Ntawd yog, lub cell tsis loj ntxiv lawm. Kev hloov pauv hloov pauv xws li kev sib txuas ntawm cov protein tshwj xeeb tshwm sim hauv lub cell. Thaum lub sij hawm germination, dej uptake, tshiab RNA thiab DNA synthesis, poob refractivity, tshav kub tsis kam, calcium dipicolinate, thiab SASPs tshwm sim.
Dab tsi yog qhov txawv ntawm Spore thiab Endospore?
• Spore yog ib qho kev ua haujlwm, kev tsim tawm los ntawm cov nroj tsuag. Endospore yog ib qho dormant, uas tsis yog kev sib deev tsim los ntawm qee yam kab mob.
• Endospore zoo ib yam li spore txawm tias nws tsis yog qhov tseeb spore.
