ArticleFrontiers in plant science2025
Transcriptome time-course analysis unravels the regulatory networks governing ratooning decline in sugarcane.
Article in Frontiers in plant science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Ratooning cultivation is the predominant production mode for sugarcane, yet ratooning decline represents a critical constraint limiting high and stable yields. To elucidate the molecular mechanisms underlying this phenomenon, this study aimed to reveal the critical period of sugarcane ratooning decline and variety-specific regulatory networks by integrating multi-year field yield data with transcriptome analysis. Methods: This study combined five consecutive years of field yield data (from plant cane to the fourth ratoon, PC-R4) with root time-course transcriptome data from three sugarcane varieties (YT93-159, YZ05-51, and YZ08-1609). Differentially expressed genes (DEGs) were identified, followed by Mfuzz time-course clustering, Weighted Gene Co-expression Network Analysis (WGCNA) to pinpoint key gene modules and hub genes, with validation by qRT-PCR. Results: The study revealed that the R2-R3 transition represents the critical turning point for ratooning decline. Compared to second ratoon (R2), yields of the three varieties decreased significantly by 14.3%, 12.64%, and 9.45% ( Discussion: This study identifies the R2-R3 transition as the critical period of ratooning decline and uncovers variety-specific coping mechanisms at the molecular level. Different varieties exhibited distinct response pathways within the regulatory network, suggesting genotype-dependent adaptation strategies to ratooning stress. The key hub genes revealed here offer valuable molecular targets and genetic resources for breeding strong-ratooning sugarcane varieties, providing insights for improving sugarcane ratooning performance and sustainability.
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