Integrative Transcriptome and Proteome Analysis Identifies Major Metabolic Pathways Involved in Pepper Fruit...

Area of Science:

• Plant Biology
• Molecular Biology
• Genomics

Background:

• Pepper (Capsicum annuum L.) fruit development is a complex, genetically controlled process.
• Understanding the molecular mechanisms underlying fruit development is crucial for crop improvement.

Purpose of the Study:

• To conduct an integrative analysis of transcriptome and proteome profiles during pepper fruit development.
• To identify key regulatory proteins and pathways involved in fruit development.
• To provide insights into transcription and translation dynamics in nonclimacteric fruit species.

Main Methods:

• Integrative analysis of transcriptome and proteome data across four fruit developmental stages in two pepper varieties.
• Identification and quantification of transcripts and protein groups.
• Analysis of gene and protein expression profiles in cell wall metabolism and key biosynthetic pathways.

Main Results:

• A total of 23,349 transcripts and 5,455 protein groups were identified.
• Transcript and protein levels decreased gradually during fruit development, with significant changes from mature green to breaker stages.
• Poor correlation was observed between differentially expressed transcript and protein profiles, highlighting post-transcriptional regulation.
• Key regulatory proteins in cell wall metabolism and capsanthin, tocopherol, and ascorbate biosynthesis were identified.

Conclusions:

• Comprehensive transcriptome and proteome analysis provides a dynamic view of pepper fruit development.
• Temporal specificity of key protein expression was revealed, offering insights into regulatory mechanisms.
• The study serves as a reference for understanding fruit development in other nonclimacteric species.