Ca(2+) and CaM are involved in Al(3+) pretreatment-promoted fluoride accumulation in tea plants (Camellia sinesis L.)

Plant Physiology and Biochemistry : PPB
Xian-Chen ZhangXiao-Chun Wan

Abstract

Tea plant (Camellia sinensis (L.) O. kuntze) is known to be a fluoride (F) and aluminum (Al(3+)) hyper-accumulator. Previous study showed that pre-treatment of Al(3+) caused a significant increase of F accumulation in tea plants. However, less is known about the intricate network of Al(3+) promoted F accumulation in tea plants. In this study, the involvement of endogenous Ca(2+) and CaM in Al(3+) pretreatment-promoted F accumulation in tea plants was investigated. Our results showed that Al(3+) induced the inverse change of intracellular Ca(2+) fluorescence intensity and stimulated Ca(2+) trans-membrane transport in the mature zone of tea root. Also, a link between internal Ca(2+) and CaM was found in tea roots under the presence of Al(3+). In order to investigate whether Ca(2+) and CaM were related to F accumulation promoted by Al(3+) pretreatment, Ca(2+) chelator EGTA and CaM antagonists CPZ and TFP were used. EGTA, CPZ, and TFP pretreatment inhibited Al(3+)-induced increase of Ca(2+) fluorescence intensity and CaM content in tea roots, and also significantly reduced Al(3+)-promoted F accumulation in tea plants. Taken together, our results suggested that the endogenous Ca(2+) and CaM are involved in Al(3+) pretreatment-promot...Continue Reading

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Citations

Dec 23, 2015·Plant Physiology and Biochemistry : PPB·Tu LanZhenming Yang
Jan 19, 2016·Journal of the Science of Food and Agriculture·Xian-Chen ZhangXiao-Chun Wan
Jul 25, 2018·Journal of Integrative Plant Biology·Xianchen ZhangXiaochun Wan
Jul 13, 2016·Journal of the Science of Food and Agriculture·Chuanyi PengXiaochun Wan
Dec 12, 2018·Ecotoxicology and Environmental Safety·Xinxin YeHongjian Gao

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