Conditionally essential: A testis-enriched heat shock protein from fall armyworm safeguards fertility and survival under heat stress.
Zhao Y, Wang P, Xie R, Cao Y, Chen X
Climate Adaptation
Fall armyworm already chews through corn, sorghum, and vegetable gardens on every inhabited continent, and hotter summers are helping it spread further — knowing exactly what keeps it reproducing under heat gives researchers a precise target to shut that down.
Fall armyworm is a caterpillar pest that devastates crops worldwide. Researchers discovered a special protein, found mainly in the insect's reproductive organs, that only becomes critical when temperatures spike — without it, males lose fertility and die in the heat. Under normal conditions the protein is barely needed, which makes it an unusually precise target: interfering with it could cripple armyworm populations specifically during the hot spells that climate change is making more frequent.
Key Findings
SfHSP19.8 is expressed almost exclusively in fall armyworm testes during larval and pupal development, making it one of the most tissue-specific heat shock proteins identified in this pest
The protein is dispensable for male reproduction under optimal temperatures but becomes essential for fertility under heat stress, demonstrating a conditionally essential function
Knockdown of SfHSP19.8 reduced thermotolerance across all life stages, not just in reproductive tissue, indicating a systemic protective role beyond the testes
chevron_right Technical Summary
Scientists found a protein in fall armyworm — one of the world's most destructive crop pests — that switches on during heat waves to keep males fertile and alive. Disrupting this protein could be a new way to suppress armyworm populations as global temperatures rise.
Abstract Preview
Extreme high temperatures significantly threaten insect development and reproduction. Small heat shock proteins (sHSPs) are crucial for thermal adaptation, but their specific roles in reproduction ...
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