Document Detail

Effect of anoxia on diapause termination in eggs of the false melon beetle, Atrachya menetriesi.
MedLine Citation:
PMID:  16257411     Owner:  NLM     Status:  MEDLINE    
The effect of anoxia on diapause development in the leaf beetle Atrachya menetriesi was investigated to elucidate the role of oxygen in regulation of egg diapause. While anoxia alone had no effect on diapause termination, it decreased diapause intensity before chilling. Such an effect reached a maximum level when anoxia lasted for about 10 days. Anoxia applied during the pre-diapause stage also reduced diapause intensity. On the other hand, anoxia terminated diapause when the diapause intensity had been lowered by sufficient duration of chilling (50 days at 7.5 degrees C). The effect of anoxia was temperature dependent; the larger effect was elicited when anoxia was combined with a higher temperature. A 50-day chilling caused more than 20% of eggs to terminate diapause upon transfer to warm conditions. However, when this chilling period was interrupted on the 20th day by a 5-day exposure to a high temperature of 20, 25 or 30 degrees C, the effect of the former chilling was cancelled partially or completely, suggesting that warming reversed diapause development. This reversing effect of a high temperature, however, was not manifested when the warming was combined with anoxia. The results suggest that anoxia inhibits diapause reversal and facilitates a certain process of diapause development. The sequence of exposure to anoxia and chilling is not important.
Kurako Kidokoro; Yoshikazu Ando
Publication Detail:
Type:  Journal Article     Date:  2005-10-28
Journal Detail:
Title:  Journal of insect physiology     Volume:  52     ISSN:  0022-1910     ISO Abbreviation:  J. Insect Physiol.     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2006-01-23     Completed Date:  2006-04-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  2985080R     Medline TA:  J Insect Physiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  87-93     Citation Subset:  IM    
Division of Molecular Science, Graduate School of Science and Technology, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
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MeSH Terms
Beetles / physiology*
Cold Temperature
Ovum / physiology
Oxygen / physiology*
Reg. No./Substance:

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