| Effect of potassium chloride (KCl) on drought resistance of potato seedlings were investigated. The results showed that KCl relieved the typical symptom of leaf produced by drought, such as maintaining contents of water, chlorophyll, and MDA and increasing the contents of proline and soluble sugar and the activities of superoxide dismutase (SOD) and catalase(CAT). In addition, it decreased transpiration rate, whereas improved the net photosynthetic rate, water use efficiency and the contents of starch and vitamin C. Plant height, base diameter, stolon number and yield per plant were increased by 6.32%, 18.28%, 13.75%, and 29.45%, respectively, when applying 0.7g KCl/seedling. In su
mmary, KCl help to develop effective resistance of potato seedling to drought by improving the water retaining capacity and activating the antioxidative system. |