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- W2362989659 abstract "【Objective】 Dendroctonus armandi Tsai et Li,Polygraphus sinensis Eggers,and Ips acuminatus Gyllenhal,are three main infested Chinese white pine bark beetles in Qinling Forest Ecosystem,and the differences of nutrition usage were discussed by analyzing its major digestive enzyme activities.【Method】 Using forint phenol,carboxymethyl cellulose sodium salt,alkali solution titration methods and idodine starch color,digestive enzyme activities of the three were measured and compared and influences of different temperatures on the enzyme activities of D.armandi adults and larvae were investigated.【Result】 The results indicated that the proteinase activity of D.armandi was the highest,followed by P.sinensis and I.acuminatus respectively.The cellulase activity of I.acuminatus ranked first,with P.sinensis and I.acuminatus in succession.The lipase activity comparison of the three was the same in asproteinase activity.The amylase activity of the three bark beetles species was shown in the following sequence:D.armandi,I.acuminatus,and P.sinensis.The optimum temperature for proteinase activity of D.armandi larvae was 20 ℃ and that of adult was 25 ℃.The optimum temperature for amylase,lipase and cellulase activity of D.armandi larvae equaled to that of D.armandi adult,40 ℃ 25 ℃ and 25 ℃ respectively.【Conclusion】 Activity differences in protease,cellulase and amylase were significant among the three pine bark beetles,while lipase activity had no significant difference.And the four types of digestive enzyme activities of D.armandi adults and larvae changed with temperature." @default.
- W2362989659 created "2016-06-24" @default.
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- W2362989659 date "2008-01-01" @default.
- W2362989659 modified "2023-09-24" @default.
- W2362989659 title "Digestion enzymes of three bark beetle species(Coleoptera:Scolytidae) in the Qingling Mountains" @default.
- W2362989659 hasPublicationYear "2008" @default.
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