iTRAQ-based quantitative proteome analysis reveals metabolic changes between a cleistogamous wheat mutant and its...

Area of Science:

• Plant Science
• Crop Science
• Molecular Biology

Background:

• Wheat is a crucial global crop facing significant yield and quality losses due to Fusarium head blight (FHB).
• Cleistogamy, a form of self-pollination, presents a potential strategy for FHB control in wheat.
• The genetic and molecular mechanisms underlying cleistogamy in wheat remain largely unexplored.

Purpose of the Study:

• To investigate the FHB resistance and agronomic characteristics of a novel cleistogamic wheat mutant, ZK001.
• To elucidate the molecular mechanisms governing cleistogamy in wheat, focusing on lodicule development.
• To identify potential protein targets for enhancing FHB resistance through conventional breeding.

Main Methods:

• FHB resistance assays and measurement of agronomic traits in ZK001 and wild-type varieties.
• Biochemical analysis of starch and soluble sugar content in lodicules.
• Comparative proteomic analysis using isobaric tags for relative and absolute quantification (iTRAQ) to identify differentially abundant proteins (DAPs).

Main Results:

• The ZK001 mutant demonstrated a lower FHB infection rate compared to its wild-type and other tested varieties.
• ZK001 exhibits abnormal lodicules that fail to facilitate flower opening, indicating a cleistogamic phenotype.
• Proteomic analysis identified DAPs related to carbohydrate metabolism, protein transport, and calcium ion binding, suggesting their role in lodicule development and cellular homeostasis.

Conclusions:

• Proteomic insights into ZK001 provide a foundation for understanding wheat lodicule development mechanisms.
• The ZK001 mutant serves as a valuable resource for studying wheat flower development and developing FHB-resistant wheat varieties through conventional breeding.