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- W2000358305 abstract "The plant plasma membrane-localized NADPH oxidases, known as respiratory burst oxidase homologues (RBOHs), appear to play crucial roles in plant growth and development. They are involved in important processes, such as root hair growth, plant defence reactions and abscisic acid signalling. Using sequence similarity searches, we identified seven putative RBOH-encoding genes in the Medicago truncatula genome. A phylogenetic reconstruction showed that Rboh gene duplications occurred in legume species. We analysed the expression of these MtRboh genes in different M. truncatula tissues: one of them, MtRbohA, was significantly up-regulated in Sinorhizobium meliloti-induced symbiotic nodules. MtRbohA expression appeared to be restricted to the nitrogen-fixing zone of the functional nodule. Moreover, using S. meliloti bacA and nifH mutants unable to form efficient nodules, a strong link between nodule nitrogen fixation and MtRbohA up-regulation was shown. MtRbohA expression was largely enhanced under hypoxic conditions. Specific RNA interference for MtRbohA provoked a decrease in the nodule nitrogen fixation activity and the modulation of genes encoding the microsymbiont nitrogenase. These results suggest that hypoxia, prevailing in the nodule-fixing zone, may drive the stimulation of MtRbohA expression, which would, in turn, lead to the regulation of nodule functioning." @default.
- W2000358305 created "2016-06-24" @default.
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- W2000358305 date "2010-12-13" @default.
- W2000358305 modified "2023-09-25" @default.
- W2000358305 title "A <i>Medicago truncatula</i> NADPH oxidase is involved in symbiotic nodule functioning" @default.
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- W2000358305 doi "https://doi.org/10.1111/j.1469-8137.2010.03509.x" @default.
- W2000358305 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3491693" @default.
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