Abstract:
:To examine the relationship between cooling rate and cold hardiness in eggs of the migratory locust, Locusta migratoria, the survival rates and cryoprotectant levels of three embryonic developmental stages were measured at different cooling rates (from 0.05 to 0.8 degrees C min(-1)) in acclimated and non-acclimated eggs. Egg survival rate increased with decreasing cooling rate. The concentration of cryoprotectants (myo-inositol, trehalose, mannitol, glycerol, and sorbitol) increased in non-acclimated eggs, but varied significantly in response to different cooling rates in acclimated eggs. The acclimation process (5 degrees C for 3 days) did not increase eggs resistance to quick cooling ("plunge" cooling and 0.8 degrees C min(-1)). Earlier stage embryos were much more sensitive than later stage embryos to the same cooling rates. Time spent at subzero temperatures also had a strong influence on egg survival.
journal_name
Cryobiologyjournal_title
Cryobiologyauthors
Wang HS,Kang Ldoi
10.1016/j.cryobiol.2005.07.003subject
Has Abstractpub_date
2005-10-01 00:00:00pages
220-9issue
2eissn
0011-2240issn
1090-2392pii
S0011-2240(05)00105-7journal_volume
51pub_type
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