CHANGES OF SOME DEHYDROGENASE ACTIVITIES IN THE LEAVES OF PEACH CULTIVAR SPRINGCREST NATURALLY INFECTED WITH THE FUNGUS TAPHRINA DEFORMANS

Abstract

The influence of Taphrina deformans (Berk.) Tul., associated with peach leaf curl disease,on glucose dehydrogenase (EC 1.1.99.10), isocitrate dehydrogenase (EC 1.1.1.42), α-ketoglutarate dehydrogenase (EC 1.2.4.2) and malate dehydrogenase (EC 1.1.1.37) activitities in the leaves harvested from peachcultivar Springcrest, was investigated. Samples of both healthy and diseased leaves were analyzed. The resultus of this study suggests that the leaves infection with the biotrophic fungus Taphrina deformans lead to the decreasing of glucose dehydrogenase and malate dehydrogenase activities and to a significantlly increasing of isocitrate dehydrogenase and α-ketoglutarate dehydrogenase activities as an attempt of host plant tissues to limit the damages caused by the fungus attack. Data obtained in this study revealed significant differences in these enzymes activities depending on the type of theenzyme, the age of the leaves and the presence or absence of fungus attack.