Journal of Stress Physiology & Biochemistry, Vol. 2, No. 2,
2006, pp. 17-22.
Original Text Copyright (cc) 2006 by Graskova, Kolesnichenko., Voinikov
ORIGINAL
ARTICLE
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QueryDate : 2016-12-24
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THE EFFECT OF HYPO- AND
HYPERTHERMIA ON THE INFECTION
OF POTATO BY Clavibacter
michiganensis subsp. sepedonicus.
Graskova I.A., Kolesnichenko A.V.,
Voinikov V.K.
Siberian
Institute of Plant
Physiology and Biochemistry SD RAS, 664033 Irkutsk p/b 317. Russia e-mail: graskova@sifibr.irk.ru
Received October 19, 2006
Abstract – The influence of ring
rot pathogen Clavibacter michiganensis
subsp. sepedonicus (Cms) on activity of weak-associated with wall cell
peroxidase of cell suspension cultures of two potato (Solanum tuberosum
L.) cultivars which are differs in resistance to this pathogen during
hypoand hyperthermia. In low resistant cultivar temperature changes did
not caused changes in weakassociated with wall cell peroxidase
activity. Pathogen influence did not cause changes in its activity in
these conditions too. At the same time pathogen actively grew under low
temperature conditions, but at 38 0C the increase of
bacterial cell number was detected only during the first five days of
experiment, but after this date bacterial cell began perishes. In
resistant cultivar temperature increase caused some increase of
peroxidase activity. Temperature decrease caused the decrease of
peroxidase activity, but following pathogen addition caused increase of
weak-associated with wall cell peroxidase activity. In high temperature
conditions pathogen addition caused significant increase of peroxidase
activity during the first minutes after pathogen addition (because of
changes in peroxidase molecule activity) and after 1.5-2 h of
incubation (because of changes in genome expression and peroxidase
synthesis). The data obtained allows us to conclude that if potatoes
are putting in cold soil it could promote potato contamination by ring
rot.
