caa a22 4500 606208089 CHVBK 20210128101020.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s00425-015-2340-2 doi (NATIONALLICENCE)springer-10.1007/s00425-015-2340-2 A natural rice rhizospheric bacterium abates arsenic accumulation in rice ( Oryza sativa L.) [Elektronische Daten] [Venkatachalam Lakshmanan, Deepak Shantharaj, Gang Li, Angelia Seyfferth, D. Janine Sherrier, Harsh Bais] Main conclusion : A natural rice rhizospheric isolate abates arsenic uptake in rice by increasing Fe plaque formation on rice roots. Rice (Oryza sativa L.) is the staple food for over half of the world's population, but its quality and yield are impacted by arsenic (As) in some regions of the world. Bacterial inoculants may be able to mitigate the negative impacts of arsenic assimilation in rice, and we identified a nonpathogenic, naturally occurring rice rhizospheric bacterium that decreases As accumulation in rice shoots in laboratory experiments. We isolated several proteobacterial strains from a rice rhizosphere that promote rice growth and enhance the oxidizing environment surrounding rice root. One Pantoea sp. strain (EA106) also demonstrated increased iron (Fe)-siderophore in culture. We evaluated EA106's ability to impact rice growth in the presence of arsenic, by inoculation of plants with EA106 (or control), subsequently grew the plants in As-supplemented medium, and quantified the resulting plant biomass, Fe and As concentrations, localization of Fe and As, and Fe plaque formation in EA106-treated and control plants. These results show that both arsenic and iron concentrations in rice can be altered by inoculation with the soil microbe EA106. The enhanced accumulation of Fe in the roots and in root plaques suggests that EA106 inoculation improves Fe uptake by the root and promotes the formation of a more oxidative environment in the rhizosphere, thereby allowing more expansive plaque formation. Therefore, this microbe may have the potential to increase food quality through a reduction in accumulation of toxic As species within the aerial portions of the plant. Springer-Verlag Berlin Heidelberg, 2015 Arsenate nationallicence Arsenite nationallicence Fe plaque nationallicence Pantoea nationallicence Rhizosphere nationallicence Rhizobacteria nationallicence Lakshmanan Venkatachalam Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Shantharaj Deepak Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Li Gang Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Seyfferth Angelia Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Janine Sherrier D. Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Bais Harsh Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut Planta Springer Berlin Heidelberg 242/4(2015-10-01), 1037-1050 0032-0935 242:4<1037 2015 242 425 https://doi.org/10.1007/s00425-015-2340-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00425-015-2340-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lakshmanan Venkatachalam Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 700 1- Shantharaj Deepak Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 700 1- Li Gang Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 700 1- Seyfferth Angelia Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 700 1- Janine Sherrier D. Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 700 1- Bais Harsh Department of Plant and Soil Sciences, University of Delaware, Newark, USA aut NATIONALLICENCE 773 0- Planta Springer Berlin Heidelberg 242/4(2015-10-01), 1037-1050 0032-0935 242:4<1037 2015 242 425