Qhov sib txawv tseem ceeb ntawm Azotobacter thiab Rhizobium yog Azotobacter yog cov kab mob tsis muaj sia nyob nitrogen-kho cov kab mob tam sim no hauv cov av, thaum Rhizobium yog cov kab mob symbiotic nitrogen- kho cov kab mob uas tsim kev sib koom ua ke nrog cov nroj tsuag legume.
Nitrogen fixation yog cov txheej txheem uas hloov cov pa nitrogen dawb rau hauv cov khoom siv nitrogen ntau dua xws li ammonia, nitrates, lossis nitrites hauv av. Cov kab mob hauv av, tshwj xeeb tshaj yog cov kab mob hauv av, nqa tawm nitrogen fixation. Nitrogen-fixing microorganisms feem ntau yog ob hom kev ua neej dawb (non-symbiotic) thiab kev sib nrig sib (symbiotic) kab mob. Azotobacter thiab Rhizobium yog ob hom kab mob kho nitrogen. Azotobactor yog cov kab mob uas tsis muaj nitrogen-kho cov kab mob, thaum Rhizobium yog cov kab mob symbiotic nitrogen-kho.
Azotobacter yog dab tsi ?
Azotobacter yog cov kab mob uas tsis muaj nitrogen-fixing nyob hauv av. Dutch microbiologist thiab botanist Martinus Beijerinck tau tshawb pom thiab piav qhia thawj kab mob Azotobacter chroococcum ntawm no genus. Lawv feem ntau yog motile thiab oval lossis spherical-puab. Lawv kuj tsim cov hlwv tuab-walled thiab tej zaum yuav tsim tau ntau qhov capsular slime. Cov kab mob Azotobacter yog gram-negative thiab muaj nyob rau hauv nruab nrab thiab alkaline av los yog dej. Cov kab mob no yog aerobic thiab dawb-nyob hauv av microbes. Azotobacter plays lub luag haujlwm tseem ceeb hauv lub voj voog nitrogen hauv qhov xwm txheej. Lawv kho qhov nkag tsis tau ntawm huab cua N2 rau hauv cov ntaub ntawv siv tau rau cov nroj tsuag thiab koom nrog N2 kho. Ntxiv mus, tib neeg siv Azotobacter los tsim biofertilizers, khoom noj khoom haus additives, thiab ib co biopolymers.
Daim duab 01: Azotobacter
Nitrogenase yog qhov tseem ceeb tshaj plaws enzyme hauv nitrogen fixation. Hom Azotobacter muaj ntau hom nitrogenase. Lub hauv paus yog molybdenum-hlau nitrogenase. Lwm hom muaj vanadium thiab hlau. Vanadium nitrogenase muaj zog dua li Mo-Fe nitrogenase ntawm qhov kub thiab txias. Qhov tseem ceeb ntawm cov kab mob no yog lawv tsis tsuas yog ua si ib qho tseem ceeb hauv N2 kho; lawv kuj synthesize biologically active tshuaj. Cov tshuaj nquag muaj xws li phytohormones xws li auxins uas txhawb kev loj hlob ntawm cov nroj tsuag.
Rhizobium yog dab tsi?
Rhizobium yog ib qho kab mob symbiotic nitrogen-kho cov kab mob uas tsim muaj kev sib koom tes sib koom ua ke nrog cov nroj tsuag legume. Cov kab mob Rhizobium belongs rau genus Rhizobium. Lawv yog cov kab mob gram-negative, rod-shaped av kab mob uas kho atmospheric nitrogen. Lub Dutch microbiologist Martinus Beijerinck yog thawj zaug cais thiab cog cov kab mob no los ntawm cov noob qoob loo hauv xyoo 1888.
Daim duab 02: Rhizobium
Cov hom Rhizobium tsim ib lub koom haum endosymbiotic nitrogen-kho nrog cov hauv paus hniav ntawm legumes thiab Parasponia. Cov kab mob no colonize cog cov hlwb thiab tsim cov hauv paus nodules. Lawv hloov pauv atmospheric nitrogen rau hauv ammonia los ntawm kev siv cov enzyme hu ua nitrogenase. Tag nrho cov txheej txheem no muab cov organic nitrogenous tebchaw xws li glutamine lossis ureides rau cov nroj tsuag. Cov nroj tsuag, nyob rau hauv lem, muab cov kab mob nrog cov organic tebchaw ua los ntawm photosynthesis. Tsis tas li ntawd, Rhizobium muaj peev xwm solubilizing phosphorous.
Dab tsi yog qhov zoo sib xws ntawm Azotobacter thiab Rhizobium ?
- Azotobacter thiab Rhizobium yog ob yam kab mob tseem ceeb hauv av.
- Ob leeg koom nrog phylum Proteobacteria.
- Lawv N2 kho kab mob.
- Ob leeg muaj nitrogenase enzyme.
- Nyob zoo ob leeg.
- Ob leeg tuaj yeem siv ua biofertilizers.
Qhov txawv ntawm Azotobacter thiab Rhizobium yog dab tsi ?
Azotobacter yog cov kab mob uas tsis muaj nitrogen-kho cov kab mob uas nyob hauv av. Ntawm qhov tod tes, Rhizobium yog symbiotic nitrogen-kho kab mob uas tsim muaj kev sib koom ua ke nrog cov nroj tsuag legume. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm Azotobacter thiab Rhizobium. Ntxiv mus, Azotobacter yog oval lossis spherical zoo li tus. Hauv qhov sib piv, Rhizobium yog tus pas nrig. Yog li, qhov no yog lwm qhov sib txawv ntawm Azotobacter thiab Rhizobium. Tsis tas li ntawd, Azotobacter belongs rau chav kawm Gammaproteobacteria, thaum Rhizobium belongs rau chav kawm Alphaproteobacteria.
Cov hauv qab no infographic teev qhov sib txawv ntawm Azotobacter thiab Rhizobium hauv daim ntawv teev npe.
Summary – Azotobacter vs Rhizobium
N2 fixation yog txheej txheem uas atmospheric nitrogen hloov los ntawm tej yam ntuj tso los yog kev lag luam txhais tau tias tsim nitrogenous tebchaw xws li ammonia, nitrates, los yog nitrites. Biological N2 kho yog ua los ntawm cov prokaryotes tshwj xeeb xws li cov kab mob hauv av. Nws tau pom thawj zaug los ntawm Dutch microbiologist Martinus Beijerinck hauv xyoo 1901. Azotobacter thiab Rhizobium yog ob hom kab mob kho nitrogen. Azotobacter yog cov kab mob uas tsis muaj nitrogen-kho cov kab mob, thaum Rhizobium yog cov kab mob symbiotic nitrogen-fixing kab mob. Rhizobium tsim kev sib koom ua ke nrog cov nroj tsuag legume. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm Azotobacter thiab Rhizobium.
