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Researcher Prajjal, Dey
Advisor Umashaanker, R.
Source KrishiKosh-Indian National Agricultural Research System
Content type Text
Educational Degree Master of Science (M.Sc.)
File Format PDF
Language English
Subject Domain (in DDC) Technology ♦ Agriculture & related technologies ♦ Garden crops (Horticulture)
Subject Keyword Crop Physiology ♦ Physiological and Biochemical Mechanism Underlying
Abstract Salinity stress is one of the most persistent among the abiotic stresses that drastically affects agricultural productivity. In the light of the increasing threat of salinization, number of efforts has been made to understand the mechanisms (molecular, biochemical and physiological) underlying salt stress tolerance to engineer plants tolerant to salinity stress. Among the approaches, recently, attempts have been made to explore the role of endophytes in improving crop performance under salinity stress. The endophytes, both bacterial and fungal, occur ubiquitously in plants and have been implicated in promoting the growth and development of the plant, under both normal and stressed conditions. Against this background, in the present study, salt sensitive paddy genotype (IR- 64) were treated with salt tolerant endophytes, Botryospaheria dothidea and Fusarium sp. Both the fungi successfully colonized the plant and significantly improved the growth of IR-64 under salt stress (150mM). Plants enriched with endophyte, maintained a significantly higher ratio of K+/ Na+ under salt stress indicating an active mechanism to improve the ionic relation of the plant under stress. Cellular level tolerance parameters such as cell membrane stability, lipid peroxidation were better maintained in plants treated with the fungus. The antioxidant levels were also higher in the fungus treated seedlings, imparting higher tolerance to stress by scavenging the ROS produced. Though the exact mechanisms underlying the plant-endophyte interaction is not clearly understood, the results indicate the potential of exploring endophytes as an efficient tool to ameliorate salinity stress in crop plants.
Educational Use Research
Education Level UG and PG
Learning Resource Type Thesis
Publisher Place Bangalore
Size (in Bytes) 7.33 MB
Page Count 82