Abstract:
:Conditioned medium was obtained from suspension cultures of soybean (Glycine max L. Merrit) cells after incubating them for 4 to 8 days with rhizobia which were separated from the soybean cells by two dialysis bags, one within another. This conditioned medium from the plant cell side (PCM) of the two membranes was used to elicit and influence nitrogenase activity (acetylene reduction) in rhizobia. When conditions for obtaining PCM from the soybean cell suspension cultures were varied, it could be shown that freshly grown rhizobia were able to induce active compounds in the PCM. These compounds caused acetylene reduction activity in test rhizobia under conditions where control rhizobia, containing various substrates, showed little or no acetylene reduction activity. Rhizobia that were already capable of acetylene reduction could not induce such compounds in the PCM when this was included with test rhizobia. The PCM from soybean cultures was also found to aid the expression of nitrogenase activity in suspension cultures of rhizobia normally associated with either peas, lupins, broad beans, or clovers. This is the first communication indicating nitrogenase activity in freeliving cultures for various species of rhizobia.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
Bednarski MA,Reporter Mdoi
10.1128/AEM.36.1.115-120.1978keywords:
subject
Has Abstractpub_date
1978-07-01 00:00:00pages
115-20issue
1eissn
0099-2240issn
1098-5336journal_volume
36pub_type
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更新日期:2006-09-01 00:00:00
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journal_title:Applied and environmental microbiology
pub_type: 杂志文章
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