Qhov sib txawv tseem ceeb ntawm mucilaginous sheath thiab gelatinous sheath yog cov mucilaginous sheath muaj glycoproteins thaum gelatinous sheath muaj collagens.
Cyanobacteria yog cov kab mob photosynthetic. Lawv tseem hu ua xiav-ntsuab algae. Lawv yog cov kab mob unicellular prokaryotic. Muaj ob hom sheaths nyob ib ncig ntawm lub cyanobacterial hlwb: mucilaginous sheath thiab gelatinous sheath. Lub mucilaginous sheath muaj ntau cellulose fibrils teem reticulately nyob rau hauv homogenous matrix. Meanwhile, tag nrho cov cyanobacteria muaj ib tug gelatinous sheath tsim ntawm collagens. Tsis tas li ntawd, lub gelatinous sheath tej zaum yuav nyias los yog tuab thiab muaj ib tug zoo-tsim homogeneous nto. Ob leeg mucilaginous thiab gelatinous sheaths tiv thaiv cyanobacterial hlwb los ntawm desiccation. Ntxiv mus, lawv pab nyob rau hauv locomotion thiab khi hlwb ua ke nyob rau hauv cov cheeb tsam. Lawv yog cov txheej txheem sab nraud nyob sab nraud ntawm phab ntsa ntawm tes ntawm cyanobacteria.
Mucilaginous Sheath yog dab tsi?
Cov ntaub qhwv mucilaginous yog ib qho ntawm ob lub sheaths uas nyob ib puag ncig cyanobacterial cells. Lub xub ntiag ntawm mucilaginous sheath yog ib tug yam ntxwv feature ntawm cyanobacteria. Qhov no tseem hu ua slime txheej. Lub cell phab ntsa ntawm cyanobacteria nyob rau hauv nruab nrab ntawm cov mucilaginous sheath thiab plasmalemma. Nws muaj cellulose fibrils teem reticulately nyob rau hauv lub matrix. Li no, nws zoo nkaus li ib homogenous qauv. Peptic acid thiab mucopolysaccharides yog cov khoom tseem ceeb ntawm fibrils.
Daim duab 01: Mucilaginous Sheath ncig Nostoc
Cyanobacteria secrete ib qho mucilaginous sheath thaum tsim cov colonies. Mucilaginous sheath tiv thaiv lub cell ntawm desiccation. Ntxiv mus, nws khi colonies ua ke thiab tso cai rau txav mus. Feem ntau, cov mucilaginous sheath muaj cov xim uas muab cov xim sib txawv rau ntau hom cyanobacteria. Lawv tshwm hauv cov xim xiav-ntsuab.
Gelatinous Sheath yog dab tsi?
Txhua tus kab mob cyanobacteria muaj gelatinous sheath. Lub gelatinous sheath yog voluminous thiab feem ntau fluffy npog tam sim no nyob ib ncig ntawm lub hlwb ntawm cyanobacteria. Nws ua kom homogenous nto nyob ib ncig ntawm lub hlwb. Functionally, nws pab tuav cov kab mob cyanobacterial ua ke hauv cov cheeb tsam.
Daim duab 02: Gelatinous Sheath
Tsis tas li ntawd, cov gelatinous sheath tej zaum yuav nyias los yog tuab thiab muaj cov npog zoo tsim. Raws li txoj cai, nws yog tsim los ntawm collagen fibers. Functionally, gelatinous sheath pab tswj lub locomotion ntawm cov hlwb. Nws kuj pab hauv kev khi hlwb ua ke hauv cov cheeb tsam. Ntxiv mus, lub gelatinous sheath muab ib tug microenvironment nyob ib ncig ntawm lub cyanobacterial hlwb qhov twg cov as-ham tseem ceeb tau nkag mus rau lub hlwb.
Dab tsi zoo sib xws ntawm Mucilaginous Sheath thiab Gelatinous Sheath?
- Mucilaginous sheath thiab gelatinous sheath yog ob lub sheaths nyob ib ncig ntawm lub hlwb ntawm cyanobacteria.
- Ob hom sheaths tiv thaiv cyanobacterial cells.
- Ntxiv mus, ob lub sheaths pab hauv kev khi hlwb ua ke thaum tsim cov cyanobacterial colonies.
- Tsis tas li ntawd, lawv pab hauv qhov chaw ntawm cov hlwb.
- Tsis tas li ntawd xwb, tab sis cov ntaub qhwv no tseem muab kev tiv thaiv phagocytic predation, antibody paub thiab lysis los ntawm cov kab mob thiab kab mob.
Qhov txawv ntawm Mucilaginous Sheath thiab Gelatinous Sheath yog dab tsi?
Qhov sib txawv tseem ceeb ntawm mucilaginous sheath thiab gelatinous sheath yog lawv cov khoom xyaw. Cov ntaub qhwv mucilaginous yog tsim los ntawm cellulose fibrils, thaum lub gelatinous sheath yog tsim los ntawm collagens.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm mucilaginous sheath thiab gelatinous sheath nyob rau hauv daim ntawv tabular.
Summary – Mucilaginous Sheath vs Gelatinous Sheath
Cyanobacteria muaj ob lub hnab nyob ib puag ncig lawv cov hlwb. Lawv yog cov mucilaginous sheath thiab gelatinous heath. Lub mucilaginous sheath yog tsim los ntawm cellulose fibrils. Cov cellulose fibrils yog teem rau hauv homogenous matrix. Tsis tas li ntawd, cov mucilaginous sheath bears pigments uas xim xiav-ntsuab algae hauv cov xim sib txawv. Meanwhile, gelatinous sheath yog tsim los ntawm collagens. Nws yog voluminous thiab feem ntau fluffy npog tam sim no nyob ib ncig ntawm lub hlwb ntawm cyanobacteria. Yog li, qhov no qhia txog qhov sib txawv ntawm mucilaginous sheath thiab gelatinous sheath.
