Abstract:
The fungus Blumeriella jaapii (syn. Coccomyces hiemalis) determines
one of the most serious diseases of the sweet and sour cherries-leaf spot, shot
hole, blight - this can affecting the leaves, fruits, petioles and fruits stems
(pedicels). A severely attack can determines the defoliation of the trees in
mid-summer, but repeated attacks can determined the devitalization of the
trees, the diminution of the fruits quality and sometimes the death of the
trees. The attack determines the biochemical and physiological modifications
in plants, some parameters beeing evidently modified. In this paper we
present the results concerning the influence of the attack of the fungus
Blumeriella jaapii on the Krebs cycle dehydrogenases (glucose-6-phosphate
dehydrogenase, isocitrate dehydrogenase, α-cetoglutarate dehydrogenase
and malate dehydrogenase) in Golia, Mariana, Maria, Catalina, Stefan,
Oana, Cetatuia, Radu, Lucia, Bucium, Tereza, Iasirom cherries sorts from
Cherry National Collection from Miroslava Station Pomiculture. The
determinations was effectued from healthy and infected leaves, beeing to put
in evidence the differentiation in connection with the presence or the absence
of the attack. The research effectued in 2007 climatic conditions
demonstrated following:
glucose-6-phosphate dehydrogenase activity
presented smaller values in infected leaves by Blumeriella jaapii in Tereza,
Ştefan, Iaşirom, Lucia, Golia, Oana and Radu sorts; isocitrate
dehydrogenase activity presented smaller values in infected leaves in Tereza,
Iaşirom, Lucia, Oana, Cetăţuia and Radu sorts; α-cetoglutarate
dehydrogenase activity presented smaller values in infected leaves in
Bucium, Ştefan, Iaşirom, Golia, Cătălina, Oana, Cetăţuia and Radu; malate
dehydrogenase activity presented smaller values in infected leaves in Tereza,
Bucium, Ştefan, Golia, Cetăţuia and Radu.
