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Integrated transcriptomic and proteomic analysis reveals the regulatory role of exogenous gibberellin in sugarcane internode maturation
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Integrated transcriptomic and proteomic analysis reveals the regulatory role of exogenous gibberellin in sugarcane internode maturation
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Journal Article
Integrated transcriptomic and proteomic analysis reveals the regulatory role of exogenous gibberellin in sugarcane internode maturation
2026
Overview
IntroductionSugarcane cultivation is a vital component of the agricultural economy in southern China. Investigating internode development in sugarcane is crucial for optimizing cultivation management practices and improving cane yield.MethodsIn this study, transcriptome and proteome sequencing were performed on internode tissues of sugarcane cultivar Guitang 42 at 0, 6, and 12 days post-treatment, aiming to identify key molecular components and elucidate biological pathways through which exogenous gibberellic acid (GA3) regulates internode maturation.ResultsAccordingly, GA3 predominantly promoted internodal elongation, rather than nodal expansion. Following transcriptome and proteome sequencing, 3D principal component analysis (PCA) based on both datasets revealed a clear separation between the GA3-treated (GA) and control (CK) groups. The comparison of GA₆d vs. CK₀d identified the largest number of differentially expressed genes (DEGs, 34,541), followed by CK₁2d vs. CK₀d (27,898) and GA₁2d vs. CK₀d (22,709). Similarly, the pairwise comparison between GA₆d and CK₀d yielded the highest number of differentially expressed proteins (DEPs, 363). KEGG enrichment analysis based on DEGs, DEPs and their intersection revealed that GA3 treatment up-regulated the phenylpropanoid biosynthesis and phenylalanine metabolism pathways, thereby promoting lignin biosynthesis. Additionally, PPI analysis revealed high-confidence interactions between two hub proteins (PAL and 4CL). Finally, we elucidated the biosynthetic pathways that produce p-hydroxyphenyl lignin, guaiacyl lignin, and syringyl lignin using L-phenylalanine as the substrate.DiscussionThe results presented herein provide new insights into sugarcane internode maturation.
Publisher
Frontiers Media SA,Frontiers Media S.A
