低分子有机酸对辣椒生长发育及叶片活性氧代谢的影响

Effects of Organic Acid with Low Molecule on the Growth and Leaf Active-oxygen Metabolism of Pepper

采用盆栽试验与室内分析相结合的方法,研究了6种低分子有机酸和一种有机酸盐对辣椒生长发育和叶片活性氧代谢的影响。结果表明:柠檬酸、乙酰丙酸和有机酸钾处理不仅可显著提高辣椒根系干质量,增加辣椒vC含量,而且提高了辣椒的产量。甲酸、柠檬酸、乙酰丙酸和有机酸钾处理使根系活力比对照分别提高83%、93.8%、96.75%和99.5%。柠檬酸、乙酰丙酸和有机酸钾处理提高了辣椒叶片的SOD和POD活性,降低了膜脂过氧化产物MDA含量,延缓了叶片衰老。但是低分子有机酸处理对CAT活性的影响较小。

In this study, pot experiment and laboratory analysis were combined to study the effects of organic acid on pepper growth and leaf active-oxygen metabolism. The experiment result showed that foliar application of levulinic acid and organic acid potassium fertilizer couldn＇t only significantly accelerate pepper＇s root dry weight and its vitamin C contents, but also improve yield of pepper. Formic acid, citric acid, levulinic acid and organic acid potassium fertilizer increased root activity,were 83% , 93.8%,96.75% and 99. 5%. Citric acid and levulinic acid and organic acid potassium fertilizer improved leaf of peper＇s the enzyme activity on SOD activity and POD activity, decreased MDA content, delayed leaf aging. But LOAs treatments had small influence of CAT activity.