Butsenko L. M., Pasichnyk L. A., Guliaieva G. B., Patyka V. P.
Pages: 48-54.

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Abstract

The purpose. Study influence of lipo-polysaccharides (LPS) of phytopathogenic bacteria Pseudomonas syringae pv. atrofaciens (McCulloch 1920) Young, Dye and Wilkie 1978 on physiological-biochemical processes in plants of wheat. Methods. Classical microbiologic, biochemical, statistical. Extraction of LPS is realized by 0,85% solution of chloride of sodium. Induction of fluorescence was measured by device «Floratest». Results. Stimulating influence of treatment with LPS of various strains of P. syringae pv. atrofaciens on pigment compound of leaves of plants of summer wheat of grade Pecherianka is determined. Essential lowering background fluorescence in leaves of summer wheat of grade Pecherianka is fixed. At treating with LPS of P. syringae pv. atrofaciens 9417 and P. syringae pv. atrofaciens 9780 — on 38,7 and 37,4% accordingly, at treating with LPS of P. syringae pv. atrofaciens UKM V-1011 — on 16,6%, whereas in alternative with treating with LPS of P. syringae pv. atrofaciens 9400 background fluorescence authentically did not differ from the control. Lipo-polysaccharides of P. syringae pv. atrofaciens 9417 and LPS of P. syringae pv. atrofaciens 9780 oppressed dark phase of photosynthesis. Conclusions. Lipo-polysaccharides of P. syringae pv. atrofaciens cause increase of amount of photosynthetic pigments — chlorophylls a and b at simultaneous lowering in content of carotenoids (for LPS of P. syringae pv. atrofaciens 9417 and LPS of P. syringae pv. atrofaciens 9780) which is accompanied by lowering of the functional activity of photosynthetic apparatus. That spread not only to «light» phase of photosynthesis, but also on efficiency of «dark» responses of cycle of Calvin, reducing their efficiency.

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Keywords: phytopathogenic bacteria, exometabolites, induction, photosynthetic pigments, fluorescence, peroxidase, catalase, photosystem.

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