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Phosphorus deficiency affected permeability to O2 and
phytase gene expression in nodules of Phaseolus
vulgaris-rhizobia symbiosis
Mohamed Lazali, Jean-Jacques Drevon
To cite this version:
Mohamed Lazali, Jean-Jacques Drevon. Phosphorus deficiency affected permeability to O2 and phy-tase gene expression in nodules of Phaseolus vulgaris-rhizobia symbiosis. 3. International Symposium on the Nitrogen Nutrition of Plants - EMBO conference ”The nitrogen nutrition of plants - Nitro-gen2016”, Aug 2016, Montpellier, France. 2016. �hal-02741683�
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PHOSPHORUS DEFICIENCY AFFECTED PERMEABILITY TO O2 AND PHYTASE GENE EXPRESSION IN NODULES OF PHASEOLUS VULGARIS-RHIZOBIA SYMBIOSIS
Mohamed Lazali1,2, Jean Jacques Drevon2
1- Département d’Agronomie, Faculté des Sciences de la Nature et de la Vie & des Sciences de la Terre. Université Djilali Bounaama Khemis Miliana, Algérie
2- Institut National de la Recherche Agronomique, UMR Ecologie Fonctionnelle & Biogéochimie des Sols et Agroécosystèmes, INRA-IRD-CIRAD-SupAgro. Place Pierre Viala 34060 Montpellier, France Email: m.lazali@yahoo.fr
Under phosphorus (P) deficiency, sensitivity of the N2-fixing legumes
increases since the large amount of P-dependent carbon and energy
turnover required during N2fixation are not satisfied. However,
despites the fact that these crops have been widely characterized under P-deficiency and a number of tolerance traits have been identified, abilities of the nodules to cope with this environmental constraint have still to be further investigated. Increases both of activity and gene expression of acid phosphatases (APases) are
among mechanisms that lead to increase both of N2fixation and
nodule respiration under P-deficiency. Our findings have revealed that activities and differential expression of phytase transcripts were positively correlated with increases both of the rhizobial symbiosis
efficiency (EURS) and nodule O2 permeability. Under P-deficiency,
this positive correlation was more significant for the P-efficient RIL115 than for the P-inefficient RIL147. It is concluded that the induced enzyme activity and the marked transcript localization of this phytase in nodule cortex would control nodule respiration and contribute to adaption of nodulated legumes to low P availability.
