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Position: Home > Articles > Increased resistance of drought by Trichoderma harzianum fungal treatment correlates with increased secondary metabolites and proline content Journal of Integrative Agriculture 2017,16 (8)

Increased resistance of drought by Trichoderma harzianum fungal treatment correlates with increased secondary metabolites and proline content

作  者:
Alwhibi, Mona S.;Hashem, Abeer;Abd Allah, Elsayed Fathi;Alqarawi, Abdulaziz A.;Soliman, Dina Wafi K.;Wirth, Stephan;Egamberdieva, Dilfuza
单  位:
Plant Pathol Res Inst, Mycol & Plant Dis Survey Dept, Giza 12511, Egypt;Leibniz Ctr Agr Landscape Res, Inst Landscape Biogeochem, D-15374 Muncheberg, Germany;King Saud Univ, Fac Food & Agr Sci, Dept Plant Prod, Riyadh 11451, Saudi Arabia;King Saud Univ, Dept Bot & Microbiol, Fac Sci, Riyadh 11451, Saudi Arabia
关键词:
antioxidants;proline;polyphenols;tomato;drought;Trichoderma harzianum
摘  要:
Plant secondary metabolites play vital role in plant stress response. In this study we investigated whether root colonization of tomato (Solanum lycopersicum) infected by Trichoderma harzianum leads to alterations in the biosynthesis of secondary plant metabolites including phytohormones and osmolyte proline under drought stress. Exposure of tomato to drought caused a drastic decline in plant growth and physiological parameters. Tomato inoculated with T. harzianum showed increased root and shoot growth and chlorophyll pigments as compared to uninoculated controls as well as drought stressed plants. Proline and total soluble protein content was increased in plants inoculated with T. harzianum under both normal as well as drought conditions. An obvious increase in phenol and flavonoid content was observed due to T. harzianum. In addition, T. harzianum inoculated plants maintained higher levels of growth regulators indole acetic acid, indole butyric acid, and gibberellic acid under drought stress. Improved secondary metabolites which play an important role in plant stress tolerance by T. harzianum may have coordinately worked for bringing the growth regulation by protecting membranes from reactive oxygen species (ROS) and enhance plant growth through accessing more nutrients by root system.

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