期刊
JOURNAL OF APPLIED MICROBIOLOGY
卷 129, 期 5, 页码 1133-1156出版社
OXFORD UNIV PRESS
DOI: 10.1111/jam.14754
关键词
ACC deaminase; IAA; N(2)fixation; nodule-enhancing rhizobacteria (NER); Rhizobia
资金
- Australian Research Council [IH140100013]
- Grains Research and Development Corporation
- Department of Trade, Tourism and Investment of the South Australian Government
- University of Adelaide
- Australian Research Council [IH140100013] Funding Source: Australian Research Council
Nitrogen fixation is an important biological process in terrestrial ecosystems and for global crop production. Legume nodulation and N(2)fixation have been improved using nodule-enhancing rhizobacteria (NER) under both regular and stressed conditions. The positive effect of NER on legume-rhizobia symbiosis can be facilitated by plant growth-promoting (PGP) mechanisms, some of which remain to be identified. NER that produce aminocyclopropane-1-carboxylic acid deaminase and indole acetic acid enhance the legume-rhizobia symbiosis through (i) enhancing the nodule induction, (ii) improving the competitiveness of rhizobia for nodulation, (iii) prolonging functional nodules by suppressing nodule senescence and (iv) upregulating genes associated with legume-rhizobia symbiosis. The means by which these processes enhance the legume-rhizobia symbiosis is the focus of this review. A better understanding of the mechanisms by which PGP rhizobacteria operate, and how they can be altered, will provide opportunities to enhance legume-rhizobial interactions, to provide new advances in plant growth promotion and N(2)fixation.
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