哈茨木霉LTR-2对蔬菜种子和幼苗耐盐性的影响及其作用机制  

Impact and mechanism of Trichoderma harzianum strain LTR-2 on salt tolerance of vegetable seeds and seedlings

作　　者：赵忠娟[1] 扈进冬[1] 吴晓青[1] 赵晓燕[1] 李哲[1] 李纪顺[1] 杨合同[1,2] 

机构地区：[1]山东省科学院生物技术研究中心山东省应用微生物重点实验室,山东济南250014 [2]山东理工大学生命科学学院,山东淄博255049

出　　处：《山东科学》2015年第5期27-34,共8页Shandong Science

基　　金：山东省科学院青年科学基金(2014QN017);山东省自然科学基金(ZR2015PC009)

摘　　要：研究了盐胁迫条件下哈茨木霉LTR-2处理对黄瓜、萝卜和番茄3种蔬菜的种子萌发、幼苗生长和生理生化反应的影响。结果表明,盐胁迫条件下,LTR-2处理的蔬菜种子萌发率明显高于未处理;LTR-2处理的蔬菜幼苗的株高、鲜重、叶片中叶绿素含量、净光合作用速率(Pn值)以及抗氧化酶活性明显高于未处理,而膜质损伤(相对电导率和丙二醛含量)弱于未处理的幼苗。哈茨木霉LTR-2能够促进盐胁迫下蔬菜种子的萌发以及幼苗的生长和光合作用,提高幼苗的抗氧化能力并降低膜质损伤,增强幼苗对盐胁迫的耐受性。We addressed the impact of Trichoderma harzianum strain LTR-2 on seed germination, seedling growth and physiological and biochemical response of cucumber, radish and tomato under salinity stress. Results show that germination rate of vegetable seeds treated with LTR-2 is significantly higher than that of seeds untreated with LTR-2 under NaCI stress. Shoot length, fresh weight, chlorophyll content, net photosynthetic rate （Pn value） and antioxidant enzyme activity of vegetable seedlings treated with LTR-2 are significantly higher than those of seedlings without LTR-2 treatment. However, relative conductivity and MDA content are less than those without LTR-2 treatment. This indicates that T. harzianum strain LTR-2 can stimulate germination of vegetable seeds, growth and photosynthesis of seedlings, improve antioxidant capacity of seedlings, reduce membrane damage, and enhance salt tolerance of seedlings.

关 键 词：哈茨木霉 蔬菜种子 盐胁迫 耐盐性 

分 类 号：S182[农业科学—农业基础科学] Q945.78[生物学—植物学]