
Cerium alleviates drought-induced stress in Phaseolus vulgaris
2019; Elsevier BV; Volume: 38; Issue: 3 Linguagem: Inglês
10.1016/j.jre.2019.07.014
ISSN2509-4963
AutoresOlívia Graziela Gelioli Salgado, Jéssica Cristina Teodoro, Joyce Pereira Alvarenga, Cynthia de Oliveira, Teotônio Soares de Carvalho, Débora Domiciano, Paulo Eduardo Ribeiro Marchiori, Luiz Roberto Guimarães Guilherme,
Tópico(s)Silicon Effects in Agriculture
ResumoExtreme drought events are expected to be one of the main challenges for tropical agriculture and, consequently, for global food security. For this reason, it is urgent to develop strategies to increase water use efficiency, as well as to increase crops' ability to cope with drought. Because rare earth elements (REEs) are known to alleviate damages in plants under abiotic stresses, we hypothesized that addition of Ce3+ to nutrient solution would promote the growth of common bean, especially under simulated drought stress. To test this hypothesis, we conducted an experiment evaluating the effect of six Ce3+ concentrations on the development and physiological traits of common bean grown in nutrient solution under normal condition and under induced drought stress, caused by the addition of polyethylene glycol 6000 to the nutrient solution. Our results show that Ce3+ alleviates water stress in common bean plants, increasing their survival rate and growth. In addition, Ce3+ application increases photosynthesis rate, chlorophyll content and water use efficiency under water stress. However, we observe no significant effect of Ce3+ on plants growing under normal condition. Therefore, Ce3+ seems to be a promising attenuator of drought stress for common bean.
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