Expression of a calcineurin gene improves salt stress tolerance in transgenic rice

文献类型： 外文期刊

第一作者： Ma, XJ

作者： Ma, XJ;Qian, Q;Zhu, DH

作者机构：

关键词： calcineurin;rice;salt;stress tolerance;CA2+-DEPENDENT PROTEIN-KINASE;VACUOLAR ION-CHANNEL;B-LIKE PROTEINS;SIGNAL-TRANSDUCTION;ABSCISIC-ACID;HIGHER-PLANTS;CALCIUM SENSORS;PHOSPHATASE 2C;ABIOTIC STRESS;NA+ TRANSPORT

期刊名称：PLANT MOLECULAR BIOLOGY （ 影响因子：4.076； 五年影响因子：4.89 ）

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收录情况： SCI

摘要： Calcineurin is a Ca2+- and calmodulin-dependent serine/threonine phosphatase and has multiple functions in animal cells including regulating ion homeostasis. We generated transgenic rice plants that not only expressed a truncated form of the catalytic subunit of mouse calcineurin, but also were able to grow and fertilize normally in the field. Notably, the expression of the mouse calcineurin gene in rice resulted in its higher salt stress tolerance than the non-transgenic rice. Physiological studies have indicated that the root growth of transgenic plants was less inhibited than the shoot growth, and that less Na+ was accumulated in the roots of transgenic plants after a prolonged period of salt stress. These findings imply that the heterologous calcineurin plays a significant role in maintaining ion homeostasis and the integrity of plant roots when exposed to salt. In addition, the calcineurin gene expression in the stems of transgenic plants correlated with the increased expression of the Rab16A gene that encodes a group 2-type late-embryogenesis-abundant (LEA) protein. Altogether our findings provide the first genetic and physiological evidence that expression of the mouse calcineurin protein functionally improves the salt stress tolerance of rice partly by limiting Na+ accumulation in the roots.

分类号： Q946

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