ArticlePhysiology and molecular biology of plants : an international journal of functional plant biology2010
Role of nodD gene product and flavonoid interactions in induction of nodulation genes in Mesorhizobium ciceri.
Article in Physiology and molecular biology of plants : an international journal of functional plant biology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 12 citations in OpenAlex.
- Regulation of Rhizobial Nodulation Genes by Flavonoid-Independent NodD Supports Nitrogen-Fixing Symbioses With Legumes.Environmental microbiology · 2025Article
- Bacterial Endophytes from Legumes Native to Arid Environments Are Promising Tools to ImproveBiology · 2024Article
- Cross-Tolerance and Autoimmunity as Missing Links in Abiotic and Biotic Stress Responses in Plants: A Perspective toward Secondary Metabolic Engineering.International journal of molecular sciences · 2021Review
- The Role of Flavonoids in Nodulation Host-Range Specificity: An Update.Plants (Basel, Switzerland) · 2016Review
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Authors and funding
4 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Mesorhizobium ciceri is a host specific bacterium which nodulates the genus, Cicer. Host specificity is regulated at first step by induction of nodulation (nod) genes in the presence of NodD protein and inducers (flavonoids) of plant origin. The inducer specificity of M. ciceri nodD gene was studied in NodD-mutant strain HN-9 carrying heterologous nodD genes and nodAlacZ fusion. The induction profile of nod promoter in M. ciceri revealed that nodD gene product of M. ciceri is specifically activated by chickpea root exudates only. M. ciceri HN-9 (nodA-lacZ) containing heterologous nodD genes from Rhizobium leguminosarum bv. viciae, R. leguminosarum bv. trifolii and Sinorhizobium meliloti was induced in presence of a number of flavonoids. On the other hand, induction profile of nod promoter showed that heterologous nodD gene products were activated to different levels in NodD(-) mutant of M. ciceri in presence of root exudates from homologous as well as heterologous legume hosts. The transfer of FITA (Flavonoid independent transcription activation) nodD gene in NodD(-) mutant, M. ciceri HN-9, was able to break the inducer specificity barrier and nod promoter was induced to maximum level irrespective of the presence or absence of inducer. It is concluded from the results that host specificity in M. ciceri - chickpea (Cicer arietinum) symbiosis is regulated at first step by the host specific interaction of nodD gene product of M. ciceri and inducers present in the root exudates of chickpea.
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