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

doi:10.3976/j.issn.1002-4026.2015.05.005

Abstract

Abstract: 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 NaCl 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.

Key words: vegetable seeds, Trichoderma harzianum, salinity stress, salt tolerance

CLC Number:

S182

ZHAO Zhongjuan, HU Jindong, WU Xiaoqing, ZHAO Xiaoyan,LI Zhe, LI Jishun, YANG Hetong. Impact and mechanism of Trichoderma harzianum strain LTR-2 on salt tolerance of vegetable seeds and seedlings[J].SHANDONG SCIENCE, 2015, 28(5): 27-34.

References

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

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