Abstract
Abstract The tissues of angiosperm parasites possess powerful riboniclease and deoxyribonuclease activities. The general properties of the enzymes, as studied in homogenates, resembled those of plant tissues in general. However, RNase of Cuscuta species differed from that of Orobanche cernua in that the latter was inhibited by Ca 2+ and Mg 2+ and stimulated by EDTA while the former was mostly unaffected. There were significant changes in enzymic activity in different regions of the filament of Cuscuta reflexa ; the changes were suggestive of an essentially degradative role for the enzymes.
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