Effect of phosphorus on arsenic uptake and metabolism in rice cultivars differing in phosphorus use efficiency and response

Júlia G Farias, Katieli Bernardy, Raíssa Schwalbert, Bianca K Del Frari, Andrew Meharg, Manus Carey, Anderson C R Marques, Antonio Signes-Pastor, Darlene Sausen, Márcio R W Schorr, Mirian S Tavares, Fernando T Nicoloso

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Abstract

A hydroponic experiment was carried out to investigate the effect of phosphorus (P) nutrition on arsenic (As) uptake and translocation within the seedlings of rice cultivars. The experiment occurred in three stages: I 5 days of acclimatization (nutritive solution); II 10 days under P (0.0 and 0.09 mM) and As (0.0 and 100 mM) treatments; III 5 days under recovery. The As exposure had significant effect reducing dry weights of shoots or roots, resulted in elevated concentrations of As in shoot tissues. BR-IRGA 409 showed the highest susceptibility to As in biomass production and root system parameters regardless the P level. This cultivar showed contrasting responses of As translocation to shoot tissue dependent on P levels, with the highest As concentration under low P and lowest under normal P levels. P nutrition was most striking on plants recovery for all cultivars under As exposure. Clearer separation of cultivars for phosphorus use efficiency (PUE) occurred at lower shoot P contents, that was, at higher levels of P deficiency stress. IRGA 424 showed higher PUE as compared to the others cultivars. Our results go some way to understanding the role of P nutrition in controlling the effects of As in rice shoots.

Original languageEnglish
Pages (from-to)0
JournalAnais da Academia Brasileira de Ciencias, 79: 739-750. (ISSN: 0001-3765)
Early online date02 Mar 2017
DOIs
Publication statusEarly online date - 02 Mar 2017
Externally publishedYes

Keywords

  • Journal Article

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    Farias, J. G., Bernardy, K., Schwalbert, R., Del Frari, B. K., Meharg, A., Carey, M., Marques, A. C. R., Signes-Pastor, A., Sausen, D., Schorr, M. R. W., Tavares, M. S., & Nicoloso, F. T. (2017). Effect of phosphorus on arsenic uptake and metabolism in rice cultivars differing in phosphorus use efficiency and response. Anais da Academia Brasileira de Ciencias, 79: 739-750. (ISSN: 0001-3765), 0. https://doi.org/10.1590/0001-3765201720160320