ROLE OF JUVENILE-HORMONE DURING LARVAL-PUPAL TRANSFORMATION OF SPODOPTERA-LITTORALIS - SWITCHOVER IN THE SENSITIVITY OF THE PROTHORACIC GLAND TO JUVENILE-HORMONE

被引:71
作者
CYMBOROWSKI, B
STOLARZ, G
机构
[1] Department of Invertebrate Physiology, University of Warsaw, 02-089 Warszawa
关键词
D O I
10.1016/0022-1910(79)90106-9
中图分类号
Q96 [昆虫学];
学科分类号
摘要
Application of JHA to the final instar of Spodoptera littoralis larvae before they attain maximal body weight causes delay to or completely blocks the onset of metamorphosis, as indicated by the dorsal vessel exposure. When the same dose of JHA is administered to the larvae just after their attaining maximal body weight, at the time of the onset of gut-emptying, metamorphosis is substantially accelerated. By means of ligature experiments, it is shown that JHA has a direct effect on the prothoracic glands. It inhibits them at the beginning of the final instar and then stimulates them shortly before pupation. It seems that under normal conditions JH is necessary for pupal cuticle formation; those larvae which pupate without JH show adult characteristics. © 1979.
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页码:939 / 942
页数:4
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