S-nitrosocysteine-responsive genes modulate diverse regulatory pathways in Oryza sativa: a transcriptome profiling...

Area of Science:

• Plant Molecular Biology
• Transcriptomics
• Plant Physiology

Background:

• Nitric oxide (NO) is a crucial signaling molecule in plants, mediating responses to various stresses.
• Rice (Oryza sativa L.) serves as a vital food crop and a model organism for genetic studies.

Purpose of the Study:

• To investigate the transcriptomic changes in rice leaves induced by nitric oxide.
• To identify genes regulated by nitric oxide and understand their functions in stress responses.

Main Methods:

• RNA-sequencing (RNA-seq) was employed to analyze gene expression in rice leaves treated with S-nitroso-L-cysteine (CySNO).
• Differentially expressed genes (DEGs) were identified and analyzed for their molecular functions and cellular localization.
• Quantitative real-time PCR (qRT-PCR) was used to validate the expression patterns of key genes.

Main Results:

• Treatment with CySNO resulted in significant changes in gene expression, with 33,539 differentially expressed genes (DEGs) identified.
• 825 genes showed at least a 2-fold change in expression, involved in diverse functions including catalysis, binding, transport, and receptor activity.
• DEGs were primarily located in cellular membranes and organelles, and included genes related to abiotic and biotic stress responses.
• Similar expression patterns were observed between rice and Arabidopsis for CySNO-responsive genes, suggesting conserved NO-mediated networks.

Conclusions:

• Nitric oxide plays a significant role in regulating the transcriptional control of a wide array of physiological functions in rice.
• NO-mediated transcriptional networks are conserved across the plant kingdom, indicating a fundamental role in plant biology.
• This study provides valuable insights into the plant's transcriptional response to nitrosative stress.