盐胁迫下外源钙对草莓内源激素含量的影响

Endogenous Hormone Regulation with Exogenous Calcium under Salt Stress in Strawberry

以‘达赛莱克特’草莓为试验材料,研究了盐胁迫条件下外源硝酸钙对草莓生理特性的影响。结果表明:Ca(NO3)2处理可抑制NaCl胁迫下草莓叶片细胞膜透性的增加,增加叶片脯氨酸含量,降低根系和叶片中的脱落酸(ABA)含量,增加赤霉素(GA)、生长素(IAA)、玉米素(ZT)的含量和ZT/ABA比值,草莓的盐害指数也有所降低。钙调素拮抗剂W7和三氟拉嗪(TFP)处理能够抑制Ca(NO3)2的作用,且W7的抑制作用比TFP更强。

Effects of exogenous calcium on physiological characteristic of strawberry （Fragaria ananassa cv. Darselect） under salt stress were studied. The membrane permeability in strawberry leaf was relief by Ca （NO3） 2 treatment. Meanwhile, the content of proline was increased and the contents of ZT, IAA, GA and ZT/ABA ratio were enhanced. However,ABA content in root and leaf was reduced and salt damage index was also reduced. The function of Ca（NO3 ）2 was inhibited with the treatment of calmodulin （CaM） antagonist TFP and W7. It showed that Ca^2＋·CaM messenger system was involved in controlling salt stress resistance in strawberry,W7 was superior to TFP in blocking the forming of Ca^2＋ ·CaM compound. After pretreatment with Ca（NO3）2 ,W7 and trifluoperazine （TFP） can block Ca^2＋·CaM messenger system.