Cerium alleviates drought-induced stress in Phaseolus vulgaris
来源期刊：Journal of Rare Earths2020年第3期
论文作者：Olívia Graziela Gelioli Salgado Jéssica Cristina Teodoro Joyce Pereira Alvarenga Cynthia de Oliveira Teotonio Soares de Carvalho Débora Domiciano Paulo Eduardo Ribeiro Marchiori Luiz Roberto Guimar?es Guilherme
文章页码：324 - 331
摘 要：Extreme 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 glycol6000 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.
Olívia Graziela Gelioli Salgado1，Jéssica Cristina Teodoro2，Joyce Pereira Alvarenga2，Cynthia de Oliveira1，Teotonio Soares de Carvalho1，Débora Domiciano2，Paulo Eduardo Ribeiro Marchiori2，Luiz Roberto Guimar?es Guilherme1
1. Department of Soil Science,Federal University of Lavras2. Department of Biology,Federal University of Lavras
摘 要：Extreme 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 glycol6000 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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