DETERMINATION OF PECTIN POLYGALACTURONASE IN FOUR SPECIES OF APHIDS

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Abstract
Investigation of the pectin polygalacturonase content by chromatographic and viscometric methods showed that the enzyme is present in the following four species of aphids in approximately the following amounts per 1000 aphids: Myzus persicae (Sulz.), 470 × 10−9 gm.; Aulacorthum solani (Kltb.), Macrosiphum solanifolii (Ashm.), and Aphis abbreviata Patch, 140–160 × 10−9 gm. The site and function of the enzyme in the aphids were not determined.