摘要
以植物内生菌次生代谢产物为供试材料,以辣椒为研究对象,采用PEG-6000模拟干旱胁迫环境,研究了植物内生菌次生代谢产物对辣椒幼苗株高、叶长、茎粗、鲜重、干重、须根数等形态指标和叶片相对含水量、细胞膜相对透性、脯氨酸等生理指标的变化,探讨植物内生菌次生代谢产物对干旱胁迫下辣椒幼苗生理机制的影响。结果表明:辣椒幼苗经次生代谢产物处理后,试验组株高高于对照组30.91%,叶长高于对照组14.76%,茎粗高于对照组129.57%,须根数高于对照组33.33%,鲜重高于对照组33.37%,干重高于对照组43.79%,叶片相对含水量高于对照组8.71%,细胞膜透性低于对照组14.63%,脯氨酸含量高于对照组14.90%;该研究表明,植物内生菌次生代谢产物通过对辣椒幼苗形态和生理特性等方面的干旱适应性调节,来提高其抗旱能力。
Taking secondary metabolites of plant entophyte as material,and pepper seedling as research object,PEG-6000 was used to simulate the drought stress environment,the effect of secondary metabolites of plant entophyte on plant height,leaf length,stem diameter,fresh weight,dry weight,the number of fibrous roots,leaf relative water content,relative membrane permeability,and content of proline of pepper seedling were investigated,the effect of secondary metabolites of plant entophyte on physiological mechanism in pepper seedlings under drought stress were studied.The results showed that,the plant height,leaf length,stem diameter,the number of fibrous roots,fresh weight,dry weight,leaf relative water content,and content of proline of the group treated by secondary metabolites were increased by 30.91%,14.76%,129.57%,33.33%,33.37%,43.79%,8.71%and 14.90%respectively compared to control（CK）.The relative membrane permeability was decreased by 14.63%compared to CK.These results suggested the secondary metabolites of plant entophyte could enhance drought resistance ability of pepper seedlings through adjusting drought adaptability including morphology and physiological characteristics.
出处
《北方园艺》
CAS
北大核心
2014年第22期29-32,共4页
Northern Horticulture
基金
辽宁省科技攻关资助项目(2011215005)
关键词
植物内生菌
辣椒
干旱胁迫
生理机制
plant endophyte
pepper
drought stress
physiological mechanism
