Cov hauv paus hniav coraloid muaj cov kab mob symbiotic cyanobacteria (xiav-ntsuab algae), uas kho nitrogen kho nitrogen Ob hom nitrogen-fixing microorganisms tau lees paub: cov kab mob dawb nyob (nonsymbiotic), suav nrog cyanobacteria (los yog xiav-ntsuab algae) Anabaena thiab Nostoc thiab genera xws li Azotobacter, Beijerinckia, thiab Clostridium; thiab mutualistic (symbiotic) kab mob xws li Rhizobium, txuam nrog leguminous nroj tsuag, … https://www.britannica.com › science › nitrogen-fixation
nitrogen fixation | Txhais, Txheej Txheem, Piv txwv, Hom, & Qhov Tseeb | Britannica
thiab, koom nrog hauv cov ntaub so ntswg, tsim cov amino acids zoo li asparagine thiab citrulline.
Dab tsi yog qhov tseem ceeb ntawm mycorrhiza thiab Coralloid cov hauv paus hniav?
Mycorrhiza thiab coraloid cov hauv paus hniav yog ob hom kev sib cuam tshuam. Mycorrhiza yog kev sib koom ua ke ntawm cov kab mob thiab cov hauv paus hniav ntawm cov nroj tsuag vascular. Coralloid cov hauv paus hniav yog hom tshwj xeeb ntawm cov hauv paus hniav ntawm cycads uas tsev nitrogen-kho cyanobacteria.
Cov haujlwm ntawm Coralloid cag ntawm Cycas yog dab tsi?
Cov hauv paus hniav coraloid feem ntau muaj nyob rau hauv Cycas uas tsim cov symbiotic cyanobacteria. Cov kab mob no ua lub luag haujlwm hauv kho cov nitrogen nrog kev pab ntawm nitrogenase. Kev kho nitrogen ua rau muaj txiaj ntsig zoo amino acids xws li asparagine thiab citrulline rau kev loj hlob ntawm cov nroj tsuag.
Dab tsiPuas yog lub luag haujlwm ntawm cyanobacteria hauv Coralloid cov hauv paus hniav?
Nyob rau hauv kev sib raug zoo, cyanobacteria kho nitrogen rau lawv cov tswv. … Nitrogen fixation nyob rau hauv Nostoc, hom tseem ceeb symbiotic rau cycads coralloid cov hauv paus hniav (Gehringer li al., 2010), tshwm sim nyob rau hauv cov qauv hu ua heterocysts, uas tshwm sim raws li saw ntawm hlwb tsim ib tug filament.
Koj yuav pom cov hauv paus Coraloid qhov twg tshwj xeeb txog lawv?
Coralloid cov hauv paus hniav yog cov hauv paus tshwj xeeb pom hauv Cycas uas cuam tshuam nrog nitrogen-kho cyanobacteria. Tsis pub dhau lub hauv paus coraloid yog thaj tsam cyanobacterial, uas yog thaj chaw nyob los ntawm cyanobacteria. Qhov no muaj cov yam ntxwv tshwj xeeb uas pab txhawb kev sib raug zoo ntawm cycad thiab cyanobacteria.
