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United States Department of Agriculture

Agricultural Research Service

Title: Acid and Alkaline Phosphatase Activities in the Digestive and Excretory Systems of the Colorado Potato Beetle

item Yi, Shuxia
item Adams, Terrance

Submitted to: Abstracts 2000 Annual Meeting of Entomological Society Of America
Publication Type: Abstract Only
Publication Acceptance Date: July 19, 2000
Publication Date: N/A

Technical Abstract: Acid (ACP) and alkaline phosphatase (ALP) activities were examined in relation to adult development and diapause in both soluble and membrane- bound extracts of the midgut, hindgut and Malpighian tubules in the Colorado potato beetle, Leptinotarsa decemlineata (Say). The soluble ACP activity was higher than the membrane-bound ACP from all tissues examined, with different developmental profiles among tissues between long- and short-day beetles. The highest soluble ACP activity was found in the midgut contents, while a maximum soluble ALP activity showed in the Malpighian tubules. Treating short-day diapausing beetles with JHA or allatotropin had significantly inducive effect on both ACP and ALP activities in all tissues examined. Treatment with 20-HE alone did not increase ACP activity in any tissue, but did increase ALP activities in all tissues except the midgut. Furthermore, JHA was able to enhance and/or modulate the effect of 20-HE treatment.

Last Modified: 4/17/2015
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