不同钙制剂处理对刺梨果实发育的影响

Effects of different treatments on fruit development of Rosa roxburghii Tratt

在刺梨果实发育过程采用钙制剂(醋酸钙300mg·L-1、碳酸钙300mg·L-1)、钙离子通道阻塞剂(氯丙嗪50μmol·L-1)及钙离子专一性螯和剂(EGTA100mmol·L-1)对刺梨果实进行喷布处理。与对照比较,醋酸钙300mg·L-1、碳酸钙300mg·L-1处理对果实发育状况有较大的促进作用,处理后刺梨果实中的Ca2+含量下降速度减缓,维生素C含量增加速度和单宁的分解转化速度加快。在果实发育的中前期,果实中CaM含量与果实生长发育情况呈响应曲线,其高峰期较对照时间有所延长。钙离子通道阻塞剂(氯丙嗪50μmol·L-1)及钙离子专一性螯和剂(EGTA100mmol·L-1)处理后,则与钙制剂的效果相左。讨论了Ca2+、CaM在刺梨果实发育中的作用。

In order to demonstrate a regulatory role of calcium for the fruit development of Rosa roxburghii Tratt.,several compounds including the calcium compounds(CaAc,300mg·L^(-1) & CaCO_3,300mg·L^(-1)),the inhibition of calcium channel(CPZ,50μmol·L^(-1))and specific chelating agent of calcium(EGTA,100mmol·L^(-1))have been used.The results indicate that,comparing with the control,the treatment of CaAC and CaCO_3 stimulates the fruit development of R.roxburghii T.,for the declined velocity calcium content,the accelerateion of vitamin C and the increased speed of tannic degration of the CaM content.In an early period of fruit development,the CaM content corresponds to the developmental condition.In contrast,CPZ and EGTA treatment have opposite results.