Transcriptomic and Proteomic Insights Into Diapause in the Wheat Stink Bug, Aelia rostrata

Area of Science:

• Insect molecular biology
• Pest management
• Agricultural entomology

Background:

• The wheat stink bug (Aelia rostrata) is a significant wheat pest in Central Anatolia.
• This insect exhibits a prolonged dormancy period of ~9 months, including summer estivation and winter diapause.
• The molecular mechanisms underlying A. rostrata's seasonal dormancy are largely unknown.

Purpose of the Study:

• To investigate the molecular basis of seasonal dormancy (estivation and winter diapause) in the wheat stink bug.
• To provide the first transcriptomic and proteomic insights into dormancy in A. rostrata.
• To identify physiological signatures associated with dormancy in this economically important pest.

Main Methods:

• Combined RNA-sequencing (RNA-seq), proteomics, and lipid content analysis.
• Examined gene expression and protein abundance in the fat body tissue.
• Quantified changes in lipid reserves during and after dormancy.

Main Results:

• Transcriptomic analysis revealed enrichment of protein synthesis genes during estivation and catabolic/metabolic genes during winter diapause.
• Proteomics identified higher abundance of mitochondrial and chitinase-like proteins during estivation, and energy metabolism proteins during winter diapause.
• Lipid reserves were significantly lower in post-diapause individuals, indicating utilization during dormancy.

Conclusions:

• This study presents the first transcriptomic and proteomic dataset for A. rostrata.
• Distinct molecular pathways are activated during estivation versus winter diapause in wheat stink bugs.
• Understanding these dormancy mechanisms can inform strategies for managing this agricultural pest.