Taking ‘Jingxin No.1’ watermelon as experimental material,this paper investigated the effects of different humic substances(HS) concentration (0,0.1,0.3,0.6,1.0 g·L-1) in Hoagland on photosynthesis, chlorophyll content,biomass,electrolyte leakage percentage,antioxidant enzyme,proline and Na+,K+ contents of watermelon seedling under salt stress(100 mmol·L-1 NaCl).The results showed that adding HS could improve the plant growth by different degrees under salt stress,especially the 0.3 g·L-1 treatment had the best alleviation effect,in which the chlorophyll contents,photosynthesis,Fv/Fm and ΦPSⅡ were significantly increased,and the distribution of Na+ and K+ was improved. At the same time,the activities of SOD and CAT were enhanced,and the electrolyte leakage percentage and MDA accumulation were reduced. Thus,watermelon plant growth was promoted.
国家科技期刊平台
NSTL
万方数据
维普
