链格孢菌蛋白激发子对棉花主要性状及相关酶变化的研究

 研究了链格孢菌蛋白激发子粗提蛋白液对棉花主要性状及相关酶变化的影响。结果表明，链格孢菌蛋白激发子诱导后，显著提高了棉花成铃数且不同程度提高了株高、铃重、衣指、子指和衣分，降低了铃壳重，促进棉花早熟，获得了较好的产量。以浸种处理的子、皮棉产量最高，分别达到3800.6 kg·hm^-2、1598.2 kg·hm^-2，比对照提高了22.15%、26.11%；从纤维品质来看，适时适度喷施棉株，纤维各个指标得到了明显的改善，尤以浸种＋现蕾期喷雾处理的综合值最高，比对照提高了6.1%；从生理生化活性来分析，链格孢菌蛋白激发子诱导后POD、NR、SOD活性及MDA含量均有不同程度的变化，POD、NR及SOD活性增强，而MDH活性降低。在此基础上对链格孢菌蛋白激发子诱导棉株生长及提高棉纤维品种的可能机制作了\{探讨。

Effect of Protein Elicitor from Alternaria Tenuissima on Main Characters of Cotton and Enzymatic Protection System of Plant

The effect of protein elicitor from Alternaria tenuissima on cotton fiber quality and biological characteristic of plant is described. By analyzing the main agronomic and economical characters，the boll number was significantly promoted by Alternaria protein elicitor. The plant height，weight of single bell，lint-index，seed-index and lint-percent were increased in different degrees，whereas the weight of single boll hull was decreased. The protein elicitor promoted cotton plant to be precocious,and increased cotton yield. By the treatment of soaking seeds，the unginned-yield and lint-yield reached 3800.6 kg·hm^-2 and 1596.2 kg·hm^-2，respectively，which were 15.12% and 17.19% higher than those of control. As to the fiber quality，many parameters were remarkedly improved by applying the protein activator at the right moment with the appropriate concentration. The treatment of soaking seeds plus spraying at bud period had the top comprehensive value，which was 6.1% higher than that of control. In the aspect of biological characteristic，the results showed that Alternaria protein elicitor influenced enzyme activity of POD，NR，SOD, and MDH in various degrees. POD，NR, and SOD increased in all treatments，while MDA decreased. Based on the above results，possible role of inducing the plant growth and enhancing the cotton fiber quality with Alternaria protein elicitor was discussed.