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Plant Signal Behav. 2013 Mar;8(3):e23426. doi: 10.4161/psb.23426. Epub 2013 Jan 18.

Regulation of legume nodulation by acidic growth conditions.

Author information

1
Australian Research Council Centre of Excellence for Integrative Legume Research; School of Agricultural and Food Sciences; The University of Queensland, St. Lucia; Brisbane, QLD Australia.

Abstract

Legumes represent some of the most important crop species worldwide. They are able to form novel root organs known as nodules, within which biological nitrogen fixation is facilitated through a symbiotic interaction with soil-dwelling bacteria called rhizobia. This provides legumes with a distinct advantage over other plant species, as nitrogen is a key factor for growth and development. Nodule formation is tightly regulated by the plant and can be inhibited by a number of external factors, such as soil pH. This is of significant agricultural and economic importance as much of global legume crops are grown on low pH soils. Despite this, the precise mechanism by which low pH conditions inhibits nodule development remains poorly characterized.

KEYWORDS:

legume nodulation; nitrogen fixation; plant signalling and development; rhizobia; soil acidity; soil pH; symbiosis

PMID:
23333963
PMCID:
PMC3676511
DOI:
10.4161/psb.23426
[Indexed for MEDLINE]
Free PMC Article
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