A. Stroinski et J. Floryszakwieczorek, EFFECTS OF CADMIUM ON THE HOST-PATHOGEN SYSTEM .4. INFLUENCE OF CADMIUM AND PHYTOPHTHORA-INFESTANS ON MEMBRANE-PERMEABILITY OF POTATO-TUBER, Journal of plant physiology, 142(5), 1993, pp. 575-578
Changes in electrolyte leakage, and Ca+2, K+, and Cl- effluxes from po
tato (Solanum tuberosum L.) tubers in response to either cadmium or Ph
ytophthora infestans, or both, were investigated. Two cultivars, Bintj
e and Bzura, susceptible and resistant, respectively, to pathogen and
cadmium were examined. Long-term exposure of the plant to cadmium, res
ulting in the presence of cadmium in tubers (0.1-20 mug g-1 fw) caused
an increase of membrane integrity in the organs of both cultivars. As
a result of the interaction between the tuber slices and pathogen mar
ked increases in electrolyte leakage, and in K+, and Cl- effluxes from
susceptible material as well as in Ca+2 efflux from resistant materia
l were observed. A simultaneous treatment of potato tubers of both cul
tivars with cadmium and pathogen brought about antagonistic effects in
membrane permeability.