Veena Pandey1, Mohammad W Ansari2, Suresh Tula3, Sandep Yadav3, Ranjan K Sahoo3, Nandini Shukla4, Gurdeep Bains1, Shail Badal1, Subhash Chandra5, A K Gaur6, Atul Kumar1, Alok Shukla7, J Kumar8, Narendra Tuteja9,10,11. 1. Department of Plant Physiology, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. 2. Department of Botany, Zakir Husain Delhi College, University of Delhi, Jawahar Lal Nehru Marg, New Delhi, 110002, India. 3. Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, 110067, India. 4. Department of Plant Pathology, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. 5. Department of Agronomy, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. 6. Department of Molecular Biology and Genetic Engineering, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. 7. Department of Plant Physiology, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. aloks99@yahoo.com. 8. Department of Plant Pathology, G.B. Pant University of Agriculture and Technology, Pantnagar, 263145, India. jkumar56@gmail.com. 9. Department of Botany, Zakir Husain Delhi College, University of Delhi, Jawahar Lal Nehru Marg, New Delhi, 110002, India. narendra@icgeb.res.in. 10. Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, New Delhi, 110067, India. narendra@icgeb.res.in. 11. Amity Institute of Microbial Technology, Amity University, E2-Block, 4th Floor, Room 404A, Sector 125, Noida, 201313, UP, India. narendra@icgeb.res.in.
Abstract
MAIN CONCLUSION: This study demonstrates a dose-dependent response of Trichoderma harzianum Th-56 in improving drought tolerance in rice by modulating proline, SOD, lipid peroxidation product and DHN / AQU transcript level, and the growth attributes. In the present study, the effect of colonization of different doses of T. harzianum Th-56 strain in rice genotypes were evaluated under drought stress. The rice genotypes treated with increasing dose of T. harzianum strain Th-56 showed better drought tolerance as compared with untreated control plant. There was significant change in malondialdehyde, proline, higher superoxide dismutase level, plant height, total dry matter, relative chlorophyll content, leaf rolling, leaf tip burn, and the number of scorched/senesced leaves in T. harzianum Th-56 treated rice genotypes under drought stress. This was corroborated with altered expression of aquaporin and dehydrin genes in T. harzianum Th-56 treated rice genotypes. The present findings suggest that a dose of 30 g/L was the most effective in improving drought tolerance in rice, and its potential exploitation will contribute to the advancement of rice genotypes to sustain crop productivity under drought stress. Interaction studies of T. harzianum with three aromatic rice genotypes suggested that PSD-17 was highly benefitted from T. harzianum colonization under drought stress.
MAIN CONCLUSION: This study demonstrates a dose-dependent response of Trichoderma harzianumTh-56 in improving drought tolerance in rice by modulating proline, SOD, lipid peroxidation product and DHN / AQU transcript level, and the growth attributes. In the present study, the effect of colonization of different doses of T. harzianumTh-56 strain in rice genotypes were evaluated under drought stress. The rice genotypes treated with increasing dose of T. harzianum strain Th-56 showed better drought tolerance as compared with untreated control plant. There was significant change in malondialdehyde, proline, higher superoxide dismutase level, plant height, total dry matter, relative chlorophyll content, leaf rolling, leaf tip burn, and the number of scorched/senesced leaves in T. harzianumTh-56 treated rice genotypes under drought stress. This was corroborated with altered expression of aquaporin and dehydrin genes in T. harzianumTh-56 treated rice genotypes. The present findings suggest that a dose of 30 g/L was the most effective in improving drought tolerance in rice, and its potential exploitation will contribute to the advancement of rice genotypes to sustain crop productivity under drought stress. Interaction studies of T. harzianum with three aromatic rice genotypes suggested that PSD-17 was highly benefitted from T. harzianum colonization under drought stress.
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