Journal of Stress Physiology & Biochemistry, Vol. 2, No. 2,
2006, pp. 10-16.
Original Text Copyright (cc) 2006 by Lomovatskaya, Romanenko, Krivolapova,
Kopytchuk
ORIGINAL
ARTICLE
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QueryDate : 2016-12-24
Cites : 0
BIOTIC STRESS IMPACT ON
ACTIVITY OF VARIOUS FORMS OF
ADENYLATE CYCLASE IN ORGANELLES OF POTATO PLANT CELLS
Lomovatskaya L.A., Romanenko А. S.,
Krivolapova N.V., Kopytchuk V.N.
Siberian
Institute of Plant
Physiology and Biochemistry SD RAS,. 664033 Irkutsk p/b 317 Russia e-mail: phytoimm@sifibr.irk.ru
Received April 17, 2006
Abstract - Notwithstanding
significant interest towards study of
adenylate cyclase plant signal system, there is still no complete
picture of functioning and regulation mechanisms of this signal system
in plants under biotic stress. With this in view, our study was aimed
at identification of various forms of adenylate cyclase (transmembrane
and “soluble”) in the nucleus and chloroplasts of potato cells and
modulation of their activity under the impact of exopolysaсcharides of
potato ring rot pathogen. The investigations conducted allowed to
conclude that two forms of adenylate cyclase function in nuclei and
chloroplasts of potato plants: transmembrane and “soluble”. Activity of
these forms of the enzyme extracted from plant cells of the two potato
varieties contrasted by resistance to potato ring rot pathogen Clavibacter
michiganensis subsp.
sepedonicus,
changed in the reverse manner with the mediated impact of
exopolysaсcharides secreted by virulent and mucinous strain of
bacterial pathogen: in the plants of resistant сultivar it increased,
in the plants of sensitive сultivar it was oppressed. It was concluded
that activity of both forms of adenylate cyclase directly depended on
the degree of resistance of a particular potato variety to given
pathogen.
