气候变化领域集成服务门户(CCPortal): Diapause survival requires a temperature-sensitive preparatory period

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DOI	10.1016/j.cris.2024.100073
	Diapause survival requires a temperature-sensitive preparatory period
	Roe, Amanda D.; Wardlaw, Ashlyn A.; Butterson, Skye; Marshall, Katie E.
发表日期	2024
EISSN	2666-5158
起始页码	5
卷号	5
英文摘要	Diapause is a form of internally-controlled dormancy that allows insects to avoid stressful conditions and periods of low food availability. Eastern spruce budworm (Choristoneura fumiferana Clemens), like many cold-adapted insects, enter diapause well in advance of winter conditions, thus exposing them to elevated temperatures during fall that can deplete energy stores and impact post-diapause survival. We explored the impact of fall conditions on C. fumiferana by manipulating the length of the fall period and exposure temperatures during the diapause initiation phase of second instar larvae in a factorial design. We exposed second instar larvae to four fall temperatures (10, 15, 20, and 25 degrees C) and five exposure times (1, 2, 4, 6, and 10 weeks) prior to standardized diapause conditions. We measured metabolites (glycogen, glycerol, and protein) prior to and during diapause for a subset of individuals. We also measured post-diapause survival by quantifying emergence following diapause conditions for a subset of individuals. We found that long, warm fall conditions depleted glycogen content and lowered post-diapause survival. We also found that short, cool conditions impacted post-diapause survival, although glycogen content remained high. Our results showed that fall conditions have substantial fitness consequences to overwintering insects. Optimal fall conditions struck a balance between exposure time and temperature. Our findings point to a potentially adaptive reason for early diapause onset: that an undescribed, but temperature-sensitive process is occurring in C. fumiferana larvae during the diapause initiation period that is essential for overwintering survival and successful post-diapause emergence.
英文关键词	Diapause initiation; Dormancy; Choristoneura fumiferana; Eastern spruce budworm; Fall; Overwintering
语种	英语
WOS研究方向	Entomology
WOS类目	Entomology
WOS记录号	WOS:001184633500001
来源期刊	CURRENT RESEARCH IN INSECT SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300931
作者单位	Natural Resources Canada; Canadian Forest Service; Great Lakes Forestry Centre; University of British Columbia
推荐引用方式 GB/T 7714	Roe, Amanda D.,Wardlaw, Ashlyn A.,Butterson, Skye,et al. Diapause survival requires a temperature-sensitive preparatory period[J],2024,5.
APA	Roe, Amanda D.,Wardlaw, Ashlyn A.,Butterson, Skye,&Marshall, Katie E..(2024).Diapause survival requires a temperature-sensitive preparatory period.CURRENT RESEARCH IN INSECT SCIENCE,5.
MLA	Roe, Amanda D.,et al."Diapause survival requires a temperature-sensitive preparatory period".CURRENT RESEARCH IN INSECT SCIENCE 5(2024).