Apr 20, 2020

Rice lectin protein Osr40c1 imparts drought tolerance by modulating OsSAM2, OsSAP8 and chromatin-associated proteins

BioRxiv : the Preprint Server for Biology
S. SahidRiddhi Datta


Lectin proteins play an important role in biotic and abiotic stress responses in plants. Although the rice lectin protein, Osr40c1, has been reported to be regulated by drought stress, the mechanism of its drought tolerance activity has not been studied so far. In this study, it has been depicted that expression of Osr40c1 gene correlates with the drought tolerance potential of various rice cultivars. Transgenic rice plants overexpressing Osr40c1 were significantly more tolerant to drought stress over the wild-type plants. Furthermore, ectopic expression of the Osr40c1 gene in tobacco yielded a similar result. Interestingly, the protein displayed a nucleo-cytoplasmic localization and was found to interact with a number of drought-responsive proteins like OsSAM2, OsSAP8, OsMNB1B, and OsH4. Fascinatingly, silencing of each of these protein partners led to drought susceptibility in the otherwise tolerant Osr40c1 expressing transgenic tobacco lines indicating that these partners were crucial for the Osr40c1-mediated drought tolerance in planta. Together, the present investigation delineated the novel role of Osr40c1 protein in imparting drought tolerance by regulating the chromatin proteins, OsMNB1B and OsH4, which presumably enabl...Continue Reading

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Mentioned in this Paper

Computer Software
Biochemical Pathway
Laboratory Procedures
Comparative Genomic Analysis
Gene Annotation

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