STUDIES ON POTENTIAL OF BIO–INOCULANTS IN ALLEVIATING DROUGHT STRESS IN TOMATO (SOLANUMLYCOPERSICUM L.)
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Date
2023-10-11
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Sher-e-Kashmir University of Agricultural Sciences & Technology of Jammu
Abstract
Plants interact with diverse microorganisms including bacteria and fungi that can have positive, negative, or neutral effects on plants. Positive effects arise from symbiotic relationships between plants and microbes. Manipulation of plant-microbe interactions can improve plant performance in applications ranging from climate change mitigation to agricultural production. Tomato (Solanumlycopersicum L.) is a commercially essential crop significantly hampered by drought. To overcome this, bio-inoculants were used for drought tolerance were adopted. This research was conducted as complete randomized design with three replications to evaluate the Studies. On Potential of Bio–Inoculants in Alleviating Drought Stress in Tomato (Solanumlycopersicum L.)in green house under different conditions of water availability i.e.controlled, drought and bio-inoculants treatment. Exogenous bio-inoculants were applied as seedling application at recommended dose 50 ml/litre. The results revealed that bio inoculation perform significant improvement in plant productivity and quality. The soil microbial population was significantly increased with no. of days of incubationtill 10th day then decreased. The plants exposed to water stress exhibited a significant decline in morphological parameters i.e. plant height, number of leaves, shoot fresh & dry weightroot fresh and dry weight whereas significant increase in root length was observed. Similarly physiological traits i.e. leaf area, LMSI and LRWC was significantly decreased under drought stress. While Electrolyte Leakage, was significantly enhanced. However in case of biochemical traits i.e. lipid peroxidation, proline, SOD, APX and CAT were increased but chlorophyll reduced under water deficit condition.A follow-up treatment with bio-inoculants protected against the stress generated by water and showed increasing trends for the morphological traits i.e. plant height, number of leaves, root length, stem/leaf/root fresh & dry weight. AtT6(Consortia of N,P and Zn-Halo Mix) application showed highest enzyme activity i.e. SOD (31.76±2.76 unit min-1 g-1 FW), CAT (73.94±2.70µmol min-1 mg-1 FW) under water deficit. Among the Inoculantsminimum reduction in yield i.e.19.64% was noted in T6(Consortia of N, P and Zn Halo Mix).On the basis of observations, exogenous application of Consortia of N,P and Zn Halo-Mix is recommended to alleviate effects of tomato (Pusa Ruby) under drought condition
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Preeti, 2023. STUDIES ON POTENTIAL OF BIO–INOCULANTS IN ALLEVIATING DROUGHT STRESS IN TOMATO (Solanum lycopersicum L.),M.Sc. Thesis, SKUAST-Jammu, India._