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Transcriptome analysis of gene expression in the tomato leaf premature senescence mutant

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Abstract

Premature senescence of leaves can critically influence tomato yield and quality. In this study, the leaf premature senescence mutant MT318 was a spontaneous mutant and was controlled by a single recessive nuclear gene. The maximum photochemical efficiency (Fv/Fm), superoxide dismutase (SOD), and chlorophyll content in the leaves of mutant MT318 gradually decreased, while malondialdehyde (MDA) content significantly increased. Under the level 2 category, Gene Ontology (GO) enrichment analysis indicated that 45 terms were enriched, comprising 22 in biological process, 12 in cellular component, and 11 in molecular function. Genes are mainly involved in the metabolic processes (696 differentially expressed genes, DEGs), cellular processes (573 DEGs), single-organism processes (503 DEGs), and catalytic activity (675 DEGs). Kyoto Encyclopedia of Genes and Genomes pathway analysis demonstrated that the 4 pathways with the largest number of genes were biosynthesis of secondary metabolites, plant-pathogen interaction, plant hormone signal transduction, and MAPK signaling pathway-plant. The ‘plant hormone signal transduction’ pathway was the most significantly enriched at the T2 stage. Pearson correlation analysis showed that the auxin regulatory pathway and SA signal transduction pathway may play important roles. These results not only lay the foundation for the further cloning and functional analysis of the MT318 premature senescence gene but also provide a reference for the study of tomato leaf senescence.

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Data availability

The transcriptome data used in this study have been submitted to the NCBI database under accession number PRJNA813642.

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Acknowledgements

This study was supported by theTianjin Science and Technology Planning Project (No. 21ZYCGN00420). We thank LetPub (www.letpub.com) for its linguistic assistance during the preparation of this manuscript.

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JF designed the experiments and wrote this paper. HM,SL, CS,SH, KW, HZ conducted the experiments. All authors read and approved the final manuscript.

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Correspondence to Fengmei Jin.

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Jin, F., Hua, M., Song, L. et al. Transcriptome analysis of gene expression in the tomato leaf premature senescence mutant. Physiol Mol Biol Plants 28, 1501–1513 (2022). https://doi.org/10.1007/s12298-022-01223-2

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  • DOI: https://doi.org/10.1007/s12298-022-01223-2

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