Document Detail

Oxygen convective uptakes in gas exchange cycles in early diapause pupae of Pieris brassicae.
MedLine Citation:
PMID:  21832124     Owner:  NLM     Status:  In-Data-Review    
Oxygen convective uptakes in gas exchange cycles were directly recorded in early diapause pupae of Pieris brassicae L. (Lepidoptera; Pieridae) by means of O(2) coulometric respirometry. This method was combined with flow-through CO(2) respirometry, the two systems being switchable one to the other. During recording with both systems, measurements were also taken with infrared actography. The pupae displayed short discontinuous gas exchange cycles lasting 40-70 min. No true C phase was found by flow-through measurements; instead, flutter opening of the spiracles with discrete convective O(2) uptakes began shortly after the O phase whereas CO(2) release was suppressed by the inward directed passive suction ventilation. The F phase was characterized by a series of small CO(2) bursts (flutter events). Between these bursts, novel sub-phase `miniflutter' was observed, which consisted of six to 10 miniature inspirations without any CO(2) emission. During the flow-through measurements, oxygen convective uptakes were indirectly recorded by the infrared actograph as sudden extensions (lengthening) of the abdominal segments at each spiracular microopening.
Katrin Jõgar; Aare Kuusik; Angela Ploomi; Luule Metspalu; Ingrid Williams; Külli Hiiesaar; Irja Kivimägi; Marika Mänd; Tea Tasa; Anne Luik
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  214     ISSN:  1477-9145     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-08-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2816-22     Citation Subset:  IM    
Estonian University of Life Sciences, Institute Agricultural and Environmental Sciences, Department of Plant Protection, Kreutzwaldi 1, Tartu 51014, Estonia.
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