| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000418058 |
| ISSN: | 0001-3765 |
| Authors: | Farias, Julia G1 Bernardy, Katieli1 Schwalbert, Raissa1 Frari, NIanca K. del1 Meharg, Andrew2 Carey, Manus2 Marques, Anderson C.R1 Signes Pastor, Antonio2 Sausen, Darlene1 Schorr, Marcio W1 Tavares, Mirian S1 Nicoloso, Fernando T1 |
| Institutions: | 1Universidade Federal de Santa Maria, Centro de Ciencias Naturais e Exatas, Santa Maria, Rio Grande do Sul. Brasil 2Queen's University of Belfast, Institute for Global Food Security, Belfast, Antrim. Reino Unido |
| Year: | 2017 |
| Season: | Mar |
| Volumen: | 89 |
| Number: | 1 |
| Pages: | 163-174 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English 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 |
| Disciplines: | Biología |
| Keyword: | Fisiología vegetal, Nutrición mineral, Asimilación de nutrientes, Fósforo, Arsénico, Arroz, Oryza sativa |
| Keyword: | Plant physiology, Mineral nutrition, Phsophorus, Arsenic, Rice, Oryza sativa |
| Full text: | Texto completo (Ver HTML) |
