摘要
以京欣1号为试材,采用Hoagland营养液水培方式,研究不同浓度腐植酸(0、0.1、0.3、0.6、1.0g·L^()-1))对盐胁迫(100mmol·L^()-1)Na Cl)下西瓜幼苗光合特性、叶绿素含量、生物量、电解质渗漏率、抗氧化酶、脯氨酸及Na^+、K^+含量的影响。结果表明:盐胁迫下营养液中添加腐植酸能不同程度改善植株生长状况,以腐植酸浓度为0.3g·L^()-1)时缓解效果最佳,显著提高了盐胁迫下西瓜幼苗的叶绿素含量、光合作用、PSⅡ最大光化学效率(Fv/Fm)和PSⅡ实际光化学效率(ΦPSⅡ),改善了植株体内Na^+、K^+分布,提高了SOD、CAT活性,降低了植株的电解质渗漏率和MDA积累,促进了西瓜植株的生长。
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 Na Cl）.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.
出处
《中国蔬菜》
北大核心
2016年第7期58-63,共6页
China Vegetables
基金
国家“十二五”科技支撑计划项目(2014BAD05B03)
山东省农业重大应用技术创新课题(2014)
山东省高等学校科技计划项目(J13LF05)
山东省现代农业产业技术体系项目(SDAIT-05-10)
关键词
西瓜
盐胁迫
腐植酸
缓解效应
Watermelon
Na Cl stress
Humic substances
Alleviation effect
