High salinity is a prevalent and critical abiotic stress that significantly hampers plant growth and disrupts the delicate balance between photosynthetic electron transport and the utilization of ATP and NADPH. To elucidate the genetic regulation underlying salt stress responses, we performed a comprehensive analysis integrating transcriptomic and proteomic profiling in leaf tissue of Pisum sativum (pea) exposed to 200 mM NaCl. Following stringent screening of the mRNA-seq and proteomic data, approximately 89 genes/proteins were identified as coordinately differentially expressed at both the proteomic and mRNA levels. Key components of photosystem II ( psbA , psbP ), cyclic electron transport ( pgrl1A , pnsB1 ), ion homeostasis ( kea3 ), and carotenoid biosynthesis ( lcy1 , zep ) were transcriptionally and translationally suppressed. These results were further validated by qRT-PCR, which mimiced the transcriptome and proteome data. Gene Ontology and KEGG enrichment analysis highlighted a systemic shift from energy acquisition towards stress defense and cellular protection. Together, our multi-omics investigation provides a mechanistic framework for understanding salinity tolerance in P. sativum , offering molecular targets for the development of stress-resilient legumes.
Dhokne et al. (Mon,) studied this question.
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