An Integrative Transcriptomics and Proteomics Approach to Identify Putative Genes Underlying Fruit Ripening in Tomato
Melisa Di Giacomo1, Tatiana Alejandra Vega1, Vladimir Cambiaso1,2
1Instituto de Investigaciones en Ciencias Agrarias de Rosario (IICAR-CONICET-UNR), Campo Experimental Villarino, Facultad de Ciencias Agrarias, Universidad Nacional de Rosario, Zavalla S2125ZAA, Santa Fe, Argentina.
Plants (Basel, Switzerland)
|August 12, 2023
Summary
Researchers studied tomato ripening using near-isogenic lines with wild introgression. Key genes involved in fruit quality and shelf life were identified, offering potential for improved tomato breeding.
Area of Science:
- Plant Science
- Genetics
- Postharvest Biology
Background:
- Understanding climacteric fruit ripening is crucial for reducing postharvest losses and enhancing fruit quality.
- Tomato ripening involves complex genetic and molecular pathways that influence shelf life and consumer appeal.
Purpose of the Study:
- To investigate the genetic basis of improved fruit quality and shelf life in tomato near-isogenic lines (NILs) introgressed with wild Solanum pimpinellifolium.
- To identify key genes and molecular mechanisms underlying enhanced ripening traits in NIL115 and NIL080.
Main Methods:
- Phenotypic analysis of fruit traits, including firmness and shelf life.
- Transcriptomic and proteomic analyses to identify differentially expressed genes and proteins during ripening.
- Integration of molecular, transcript, and protein data with phenotypic information.
Main Results:
- Both NILs exhibited improved fruit firmness, with NIL115 showing a longer shelf life compared to the cultivated parent.
- NIL115 displayed differential expression of an APETALA2 ethylene response transcription factor (AP2/ERF) and upregulated E4 (ERF) expression.
- Significant changes in protein expression were observed, including ethylene biosynthetic enzyme (ACO3) and pectate lyase (PL) in NIL115, and alpha-1,4 glucan phosphorylase (Pho1a) in NIL080.
Conclusions:
- The study provides insights into specific genes influencing tomato ripening and shelf life, such as AP2/ERF and E4 transcription factors.
- Identified ripening-related genes and proteins offer targets for marker-assisted breeding to develop tomatoes with enhanced postharvest characteristics.
- Data integration proved effective in unraveling complex ripening pathways and identifying genes with potential for improving fruit quality.
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