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Oxalic acids are widely distributed in tissues of various plants that can exacerbate the effect on other plant-grazing animals including humans. Bacterial communities had been demonstrated to specify with the rhizosphere of host type and which can differ with oxalogenic plant. The present study has been conducted with the primary objective of understanding the root-associated microbial communities in Colocasia esculenta, an oxalogenic plant and to recognize possible bacterial species that present the potential of having their capability to metabolize oxalates. Of the 852 sequences obtained, 311 corresponded to rhizosphere (S), 250 to rhizoplane (P) and 291 were from non-rhizospheric (NS) soil. Flavobacteriaceae, Enterobacteriaceae, Moraxellaceae and Pseudomonadaceae were the major contributors in the rhizoplane microbial community assemblage. Paenibacillaceae was the major contributor to the rhizospheric microbial community. The findings of the study showed that the rhizoplane, owing to the characteristic root exudates, has a distinctive composition of microbial partners as compared to the rhizosphere and bulk soil communities. [ABSTRACT FROM AUTHOR]

Oxalates are toxic secondary metabolites found in a variety of plant taxa and are consumed by numerous organisms. Termites have a heterogeneous food habit and consume oxalate producing plants. Intestinal microbes have been reported to be instrumental in metabolizing oxalate in mammals. The present study dwells on the idea that termite gut microbiota plays crucial role in detoxifying oxalate compounds. To implore upon this hypothesis, we investigated gut eubacterial community structure of Odontotermes species through constructing and analyzing 16S rRNA gene clone library. Total of twenty four bacterial genera belonging to ten bacterial phyla were detected. In addition, three bacterial isolates having oxalate metabolizing ability were isolated through enrichment that belonged to Citrobacter species (OX_T1) and two Rhizobium species (OX_T2 & OX_T3), these isolate showed promising potential for oxalate metabolism. Further, metabolic prediction using PICRUSt, illustrated a variety of genes participating in the oxalate degradation pathways in termite gut. The present study attempts to catalogue Odontotermes gut microbiome and their plausible role in oxalate degradation and detoxification. [ABSTRACT FROM AUTHOR]