高温胁迫下番茄体内ABA水平的变化及其对花粉萌发的影响

Changes of Endogenous Abscisic Acid and the Effent of Exogenous ABA on Pollen Germination under Heat Stress Tomato

研究了番茄耐热品种和不耐热品种在高温条件下内源ABA水平的差异,探讨了外源ABA处理对高温下花粉萌发的影响。结果表明,在常温下,耐热与不耐热品种叶片中ABA差异不明显,但在高温下,耐热品种叶片ABA含量提高的幅度明显大于不耐热品种;耐热品种花器官中ABA含量无论在常温还是在高温下,都高于不耐热品种;外源ABA处理可以显著减轻高温对花粉萌发的抑制作用。

The investigation was done on the comparision with endogenous abscisic acid levels, and the effect of exogenous abscisic acid on the pollen germination under high temperature among different heat-tolerant tomato varieties. It showed that the leaf ABA levels had no obvious difference between heat-tolerant and heat-sensitive varieties at optimal growing temperature(25℃), but increased greatly in heat-tolerant varieties after treatment with superoptimal temperatures. Heat-tolerant varieties exhibited a higher ABA level in flowers both at optimal and superoptimal temperatures compared with heat-sensitive varieties. Application of exogenous ABA could partly alleviated inhibition of heat stress on pollen germination.