【摘要】 细极链格孢菌蛋白激发子是一种能诱导植物获得系统抗病性的新型蛋白激发子。在湘杂棉3号的主要生育期,用细极链格孢菌蛋白激发子(PEAT)蛋白粗提液进行叶面喷施后,对棉花叶片中酶保护系统的变化进行了研究。结果表明,经细极链格孢菌蛋白激发子诱导后,棉花叶片POD、SOD、NR的活性与C/N比对照显著增加,而MDA含量比对照显著减少。这可能是PEAT影响棉花细胞内微环境的氧化、还原状态激发植株体内酶保护系统,激活植物自身防卫系统与生长系统,从而使棉花产生对病虫害的抗性,促进了植株生长。更多还原

【Abstract】 The protein elicitor from Alternaria tenuissima (PEAT) was previously shown to be an efficient elicitor of induced systematic resistance in several crops.The role of crude extracts of PEAT on enzymatic protection system in cotton leaves by foliar spraying was investigated in growth and development periods of the Hunan Hybrid Cotton 3.Results showed that the activity of POD,SOD,SR and the ratio of C/N increased significantly when PEAT was sprayed on cotton leaves.However,the activity of MDA decreased significantly at the same time.It was speculated that PEAT might affect the redox of microenvironment in cotton leaves.PEAT might elicit the enzymatic protection system and activate the defensive system and growth system.Resistance to disease and pests might be induced and the growth and development might be accelerated in cotton sequentially.更多还原