Induction of nodD Gene in a Betarhizobium Isolate, Cupriavidus sp. of Mimosa pudica, by Root Nodule Phenolic Acids

Mandal, Santi M.; Chakraborty, Debraj; Dutta, Suhrid R.; Ghosh, Ananta K.; Pati, Biswamoy; Korpole, Suresh; Paul, Debarati

doi:10.1007/s00284-016-1009-9

Cited by 4 publications

(2 citation statements)

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“…The phenolic acids such as PA, VA, CaA, 4CoA and 4HBA identi ed in this study could have contributed to enhanced biological nitrogen xation (BNF) by promoting rhizobial growth and nodule development (Klein et Mandal et al 2016). Several bacterial strains were identi ed in the V. unguiculata nodules and these included Bacillus, Paenibacillus, Rhizobium, Bradyrhizobium and Delftia strains (Table 1) (Makaure et al 2022).…”

Section: Discussionmentioning

confidence: 86%

“…The phenolic acids PA, VA, CaA, 4CoA and 4HBA exuded by V. unguiculata could have helped in nod gene expression regulation of the Rhizobium and they could have modi ed the legume-Rhizobium symbiosis (Schultze and Kondorosi 1998, Seneviratne and Jayasinghearachchi 2003). In earlier studies, PA and p-HBA acids were shown to effectively induce nod gene in root nodules of Mimosa pudica (Mandal et al 2016). It is evidenced that CaA enhanced the enzymatic levels in N 2 xation and it increased the levels of carbohydrates and proteins in legume nodules (Dhir et al 1992).…”

Section: Discussionmentioning

confidence: 94%

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Phenolic acids and antioxidant regulation in Vigna unguiculata L. (Walp) growing in acidic and nutrient deficient grassland and savanna soils

Makaure¹,

Aremu²,

Grúz³

et al. 2022

Preprint

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PurposeSoil acidity and nutrient stress in grassland and savanna ecosystems are the major abiotic factors affecting crop production thus contributing to food insecurity. Some plants including crop legumes may thrive in acidic and nutrient stressed soil environments by regulating their secondary metabolites. In this study, we investigated how four Vigna unguiculata varieties regulated their phenolic acid concentrations and antioxidant capacities to better adapt to acidic and nutrient deficient grassland and savanna ecosystems.MethodsFour V. unguiculata varieties (IT18, Batch white, Brown mix and Dr Saunders) were grown in soils collected from four geographically distinct areas (Bergville, Ashburton, Izingolweni, Hluhluwe) in KwaZulu-Natal covering grassland and savanna ecosystems. Plants were analyzed for nutrient composition, arbuscular mycorrhizal fungi colonization percentage, root nodulating bacteria. Identification and quantification of phenolic acids was also done on both above ground and below ground plant parts. Oxygen radical absorbance capacity of the different V. unguiculata varieties was also determined. ResultsThere were differences in plant biomass and nitrogen and phosphorus nutrition across the four V. unguiculata varieties, with high arbuscular mycorrhizal fungi colonization of greater than 58%. V. unguiculata was nodulated by several bacterial strains including Bacillus, Paenibacillus, Delftia, Rhizobium and Bradyrhizobium All four V. unguiculata varieties had variations of phenolic acids across all soil types with vanillic acid and protocatechuic acid being the most abundant and constituted 22.59% and 17.22%, respectively of the total quantified phenolic acids. Principal component analysis showed that the four V. unguiculata varieties responded differently to the different soil types with respect to phenolic acid production. There were variations in correlations between the phenolic acids and plant biomass, plant nutrition, soil nutrition and arbuscular mycorrhizal fungi infection. Varieties IT18 and Batch white had relatively higher oxygen radical absorbance capacity (ORAC) across the four soil types and comparably higher plant biomass relative to Brown mix and Dr Saunders.ConclusionOverall, the current findings demonstrated that V. unguiculata has the potential of adapting to acidic and nutrient stressed grassland and savanna conditions through production of phenolic acids and enhanced antioxidant capacity.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 94%