Transcriptome Analysis of Potato Leaves under Oxidative Stress

Area of Science:

• Plant Science
• Molecular Biology
• Genomics

Background:

• Potato (Solanum tuberosum L.) is a vital global food crop.
• Oxidative stress significantly impacts potato growth, with unclear molecular mechanisms of resistance.
• Previous research implicated transcription factors, post-translational modifications, and antioxidant enzymes.

Purpose of the Study:

• To elucidate the molecular mechanisms of potato leaf response to oxidative stress.
• To identify key genes and pathways involved in oxidative stress tolerance in potato.

Main Methods:

• Transcriptome analysis of potato leaves under hydrogen peroxide (H2O2) and Methyl viologen (MV) treatments.
• Identification and enrichment analysis of differentially expressed genes (DEGs).
• Validation of selected DEGs using quantitative real-time PCR (qRT-PCR).

Main Results:

• 8334 DEGs (CK vs. H2O2) and 4445 DEGs (CK vs. MV) were identified.
• DEGs were enriched in metabolic pathways, plant hormone signal transduction, MAPK signaling, and plant-pathogen interactions.
• Key candidate genes including MYB, WRKY transcription factors, and Ca2+-mediated signaling genes were identified, with several showing high expression.

Conclusions:

• Specific plant hormone, CNGC, MYB, and WRKY genes are likely crucial for regulating oxidative stress tolerance in potato leaves.
• These findings provide a foundation for further research into potato oxidative stress response mechanisms.