PMID- 35092312 OWN - NLM STAT- MEDLINE DCOM- 20220225 LR - 20220225 IS - 1399-3054 (Electronic) IS - 0031-9317 (Linking) VI - 174 IP - 1 DP - 2022 Jan TI - Unraveling the contribution of OsSOS2 in conferring salinity and drought tolerance in a high-yielding rice. PG - e13638 LID - 10.1111/ppl.13638 [doi] AB - Abiotic stresses are emerging as a potential threat to sustainable agriculture worldwide. Soil salinity and drought will be the major limiting factors for rice productivity in years to come. The Salt Overly Sensitive (SOS) pathway plays a key role in salinity tolerance by maintaining the cellular ion homeostasis, with SOS2, a S/T kinase, being a vital component. The present study investigated the role of the OsSOS2, a SOS2 homolog from rice, in improving salinity and drought tolerance. Transgenic plants with either overexpression (OE) or knockdown (KD) of OsSOS2 were raised in one of the high-yielding cultivars of rice-IR64. Using a combined approach based on physiological, biochemical, anatomical, microscopic, molecular, and agronomic assessment, the evidence presented in this study advocates the role of OsSOS2 in improving salinity and drought tolerance in rice. The OE plants were found to have favorable ion and redox homeostasis when grown in the presence of salinity, while the KD plants showed the reverse pattern. Several key stress-responsive genes were found to work in an orchestrated manner to contribute to this phenotype. Notably, the OE plants showed tolerance to stress at both the seedling and the reproductive stages, addressing the two most sensitive stages of the plant. Keeping in mind the importance of developing crops plants with tolerance to multiple stresses, the present study established the potential of OsSOS2 for biotechnological applications to improve salinity and drought stress tolerance in diverse cultivars of rice. CI - (c) 2022 Scandinavian Plant Physiology Society. FAU - Kumar, Gautam AU - Kumar G AD - Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India. FAU - Basu, Sahana AU - Basu S AD - Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India. FAU - Singla-Pareek, Sneh L AU - Singla-Pareek SL AUID- ORCID: 0000-0002-0521-2622 AD - Plant Molecular Biology, International Centre for Genetic Engineering and Biotechnology, New Delhi, India. FAU - Pareek, Ashwani AU - Pareek A AUID- ORCID: 0000-0002-2923-0681 AD - Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India. AD - National Agri-Food Biotechnology Institute (NABI), Mohali, India. LA - eng GR - Department of Biotechnology, Government of India, and Institutional Umbrella support over the years under DST-FIST and PURSE/ GR - UGC-UPEII, DRS, and Networking/ PT - Journal Article PL - Denmark TA - Physiol Plant JT - Physiologia plantarum JID - 1256322 RN - 0 (Plant Proteins) SB - IM MH - Droughts MH - Gene Expression Regulation, Plant MH - *Oryza/metabolism MH - Plant Proteins/genetics/metabolism MH - Plants, Genetically Modified/genetics MH - Salinity MH - Salt Tolerance/genetics MH - Stress, Physiological/genetics EDAT- 2022/01/30 06:00 MHDA- 2022/02/26 06:00 CRDT- 2022/01/29 08:35 PHST- 2022/01/25 00:00 [revised] PHST- 2021/12/08 00:00 [received] PHST- 2022/01/26 00:00 [accepted] PHST- 2022/01/30 06:00 [pubmed] PHST- 2022/02/26 06:00 [medline] PHST- 2022/01/29 08:35 [entrez] AID - 10.1111/ppl.13638 [doi] PST - ppublish SO - Physiol Plant. 2022 Jan;174(1):e13638. doi: 10.1111/ppl.13638.