Cyst - ib daim ntawv ntawm microbial lub neej. Tso cai thiab hom

Tej zaum, nyob rau hauv cov xwm muaj yog tsis muaj ntau survivable thiab nruj heev heev rau cov ib puag ncig ntawm cov kab mob no dua cov kab mob. Cov unicellular neej cov ntaub ntawv uas muaj peev xwm ntawm tiv lub enormous hloov nyob rau hauv kub, siab thiab acidity. Lawv yog cov nyob rau hauv ib tug qhuav rau ib ntev lub sij hawm tsis muaj dej, thiab raws li thaum lub tshwm sim ntawm dej siab tej yam ib zaug dua rov qab mus rau lub neej zoo. Raws li cov kab mob yuav muaj sia nyob qhov twg lwm yam kab mob raug tua?

Yuav ua li cas yog ib tug cyst hauv ib

Tus kab mob yog muaj peev xwm kom ciaj sia phiv tej yam kev mob uas siv cov encystment. Lub essence ntawm no yog tias tus kab mob hlwb surrounded los ntawm tuab plhaub. Nyob rau hauv qhov tseeb, qhov no yog precisely vim li cas hais tias cov kab mob yog tsis ntshai ntawm drought los yog kub hloov.

Cyst - yog ib daim ntawv ntawm cov hav zoov ntawm cov kab mob uas lawv muaj peev xwm kom ciaj sia nyob rau hauv tus ntawm cov nyom yam tseem ceeb. Qhov no tiv thaiv thiab coj qauv yog raug tsis tsuas yog rau cov prokaryotic kab mob, tab sis kuj rau ib co protists.

Nta quiescent hlwb

Cyst - qhov no yog ib tug heev cov kev hauv daim ntawv ntawm cov kab mob, uas ua rau yus ib co transformations nyob rau hauv lub cell. Tej yam no yog nyob rau ntawm lub hom encystment, tab sis muaj ib co kev cov yam ntxwv ntawm tus txheej txheem. Firstly, lub cell yog tsim tuab ib ncig ntawm lub containment plhaub, uas yog ib tug teeb meem rau kev phiv tej yam.

Txawm li cas los encystation kiag los yog cov thaiv kev sib txuas lus hlwb rau lub cheeb tsam, yog li cov kab mob yuav tsum npaj rau tsim ntawm ib tug tuab plhaub. Thawj kab mob stockpile tshuaj yam thiab enzymes, uas yuav ua hauj lwm txawm nyob rau hauv encystment. Tom qab ntawd, cell loses ib co ntawm nws cov qauv, nyob rau hauv kev txiav txim los mus ib ntus tshem tawm ruaj thaum lub caij cov nqi zog.

Cyst - qhov no yog ib tug ntawm cov theem ntawm lub neej voj voog uas muaj ntau microorganisms. Raws li, encystment txheej txheem yog periodic. Ib txhia cov hlwv yuav nyob twj ywm siv tau tom qab 5 los sis txawm 10 xyoo. Muaj pov thawj hais tias hlwv ntawm protozoa yuav nyob mus txog 16 xyoo. Nws muab txoj cai hu mus rau tus feem ntau tenacious kab mob nyob rau hauv lub ntiaj chaw.

Yam pab encystation

Txoj kev tshawb no ntawm cov kab mob nyob rau hauv laboratory tej yam kev mob tau qhia hais tias qhov zoo tshaj plaws ntaus ntawv rau kev phiv tej yam kev mob yog cyst. Kev txiav txim ntawm encysted hlwb nyob rau hauv Petri tais diav nyob rau hauv tus ntawm ntau yam qhia tau hais tias qhov tseem ceeb ntawm kev kaw ntom nti cell phab ntsa. Yuav ua li cas yog cov yam tseem ceeb uas ua rau cov tsim ntawm cov hlwv?

1. Cov kev hloov hauv kub.

2. Change nyob rau hauv lub concentration ntawm solutes nyob rau hauv lub nruab nrab.

3. Vaporization ntawm cov dej (dehumidification dej).

4. Tus tsis muaj los yog tshaj ntawm cov pa.

5. Tsis muaj zaub mov pab.

Qhov kawg taw tes yog ib yam ua encystment microorganisms. Yog hais tias lub Petri zaub mov mus rau loj hlob ib tug colony ntawm cov kab mob, cov zaub mov nyob rau thaum xaus ntawm lub Tshuag feem ntau ntawm cov hlwb nyaij nyob rau hauv daim ntawv ntawm cov hlwv. Yog hais tias qhov nruab nrab yog nplua nuj nyob rau hauv cov as-ham, qhov yuav tshwm encystment tsawg heev.

Ib txhia pab pawg ntawm cov kab mob cyst cov ntaub ntawv thiab nyob rau hauv txawv tshwm sim. Piv txwv li, ciliates, tus txheej txheem no yog tsim nyog rau rearrangements nuclear ntaus ntawv hauv lub cell. Encystation cab eukaryotic hlwb tshwm sim nyob rau hauv thiaj li yuav tuaj tawm los ntawm cov tswv tsev, thiab tau mus rau hauv lub unfit nyob ib puag ncig. Ib txhia cov neeg sawv cev ntawm lub prokaryotes thiab eukaryotes siv hlwv rau tu tub tu kiv.

hom encystment

Lub hom phiaj uas tus kab mob kis tau mus rau hauv lub cyst theem? Ntawm no yog ib tug ob peb hom encystment, uas yog feem ntau pom muaj nyob rau hauv cov xwm.

1. so hlwv.

Cov ntaub ntawv ntawm cov kab mob thiab protists yog typified encystment, nyob rau lub cell yog muaj kev phiv tej yam kev mob.

2. hlwv tu tub tu kiv.

Qhov no hom yog cov yam ntxwv rau ntau yam neeg sawv cev ntawm ciliates. Nyob rau hauv cov ntaub ntawv no, lub hlwv tsim ib tug txaus nyias nyias nyias, thiab cov cell pib faib pheej. Raws li ib tug tshwm sim, lub cyst bursts thiab lub teeb mus tawm ib tug loj tus naj npawb ntawm cov ntawv luam ntawm cov niam kab mob.

3. hlwv digestion.

Tej ntaub ntawv ntawm cov hlwb tsis tshua muaj nyob rau hauv ib tug ob peb hom microorganisms. Ntawm no cyst - ib lub cuab tam rau zoo digestion. Qhov no zoo encystment cov yam ntxwv ntawm tus kab mob no, ua npua, uas tom qab "noj" ntawm tus neeg tsim daim tawv nqaij thiab pib zom cov prey.