Comparative performance of CGR 3 and CGR 3-1 on photosynthetic characteristics and yield of mung bean ( Phaseolus radiata )

摘要

The effects of methyl 1-(3, 3-dimenthyl-2-oxobutyl)-1H-1, 2, 4-triazole-3-carboxylate (CGR 3 ) and 1-(3,3-dimethyl-2-oxobutyl)-1H-1, 2, 4-triazole-3-carboxylic acid (CGR 3-1 ), as two new plant growth regulators, on photosynthetic characteristics and?mung bean yield were investigated in this study. Both regulators improved the net photosynthetic rate (P N ), stomatal conductance (gs), intercellular CO 2 concentration (Ci) and transpiration rate (E); CGR 3-1 had a larger impact than CGR 3 . In terms of photosynthetic efficiency, CGR 3-1 showed higher effectiveness. Considering photosynthetic pigments , the two regulators enhanced the contents of chlorophyll a, chlorophyll b, chlorophyll (a+b) and carotenoid. The application of CGR 3-1 (CGR 3 ) significantly increased (decreased) the contents of soluble sugar and starch. The results indicated that CGR 3-1 was more effective in improving the photosynthetic characteristics and yield of mung bean and can be a widely adopted strategy for producers.