Author:
Bhattacharjee Bijoya,Ali Akib,Rangappa Krishnappa,Choudhury Burhan U.,Mishra V. K.
Abstract
AbstractSeasonal variations in rainfall patterns, particularly during sowing, early growing season, and flowering, drastically affect rice production in northeastern India. However, sensitivity to drought stress is genotype-specific. Since 80% of the land in this region is used for rice production, it is crucial to understand how they have adapted to water stress. This study evaluated 112 rice genotypes grown in NE India for seed germination percentage and seedling development under PEG-mediated drought stress. Among the rice genotype, Sahbhagi dhan, RCPL-1-82, Bhalum-3 and RCPL-1-128 showed drought-tolerant traits, while Ketaki Joha, Chakhao, Chandan, RCPL-1-185 and IR-64 were the most drought-sensitive rice genotypes. Drought-tolerant rice also showed significantly higher seed germination potential, proline content, antioxidant activity and expression of drought-responsive genes than drought-sensitive rice genotypes. A similar expression pattern of genes was also observed in the rice genotype treated with a 50% water deficit in pot culture. In addition, drought stress reduced the pollen fertility and yield per plant in sensitive rice genotypes. Molecular markers associated with drought stress were also used to characterize genetic diversity among the rice genotypes studied.
Publisher
Springer Science and Business Media LLC
Reference70 articles.
1. Tripathi, K. K., Govila, O. P., Ranjini, W. & Vibha, A. Biology of okra [Abelmoschus esculentus (L.) (Moench]. Serious of Crop Specific Biology Document (Ministry of Environment and Forests Government of India and Department of Biotechnology Ministry of Science and Technology Government of India, 2011).
2. Verma, R. K. et al. Identification and characterization of genes for drought tolerance in upland rice cultivar ‘Banglami’ of North East India. Mol. Biol. Rep. 12, 1–9 (2022).
3. Vibhuti, C. S., Bargali, K. & Bargali, S. S. Seed germination and seedling growth parameters of rice (Oryza sativa L.) varieties as affected by salt and water stress. Indian J. Agric. Sci. 85(1), 102–108 (2015).
4. Lv, Y. et al. Identification of putative drought-responsive genes in rice using gene co-expression analysis. Bioinformatics 15(7), 480 (2019).
5. Khan, M. I. et al. Improving drought tolerance in rice: Ensuring food security through multi-dimensional approaches. Physiol. Plant 172(2), 645–689 (2021).