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presence of PS-K maybe caused by its stimulation of recovery and synthetic
processes, or by the arousal of plant adaptive possibilities. Besides the determination
of Chi fluorescence induction has been frequently used in plant stress physiology.
The results of this study are important in understanding the protective function of
PS-K on salt stress mechanism.
The role of pigments in plant life processes is indispensable. The synthesis of
photоsynthetic pigments is genetically controlled, but it also depends on environmental
factors.
The quantitative changes in pigment complex (chlorophyll a,b and carotenoides) in
the leaves of
Populus bollecma
L.,
Robinia pseudoacacia
L.,
Ligistrum vufgare
and
Nerium oleandr
under effect of fluorine containing phytotoxicants were determined.
The chlorophyll a (chi a) content change in the poplar and acacia leaves is higher
considerably than in the oleandr and privet leaves. The changes in pigmental complex
under the effect of fluorine pollutants is mainly the result of chi b decrease. The
levels of carotenoides changes are also unsynonymous. In the poplar, acacia and
especially in the privet leaves the carotenoides amount is decreased in response to
toxicants, in the oleander leaves its content is increasing. It maybe concluded that
piastid apparatus is adapted to the environment pollution by the changes in ratio of
pigmental complex. Nevertheless, destructive changes in the piastid pigments and their
formed complexes follows the photosynthesis inhibition.
On the basis of the experimental data concerning the effect of the phytoactive
polymers ( polystimulines) on plant life it may also be concluded that application of
these plant growth regulators to forestry and agronomy is very promising.
REFERENCES
Basra A.S. ‘'Gene expression in relation to salt tolerance”. In: Stress induced gene
expression in plants . Harword Academic Publishers, Switzerland, 1994,61-87
Blum A_“Breeding crop varieties for stress environments”. Critical Reviews in Plant
Sciences, 1986, 2 ,3 , 199 - 237
Howarth C. J. “Molecular responses of plants to an increased incidence of heat
shock” . Plant Cell and Environment, 1991, 14,831 - 841
Tsatsakis AVlachakis EShtilman M, Shashkova I., AJlahverdiev S. “Water soluble
polymeric systems of phytohormones with slow release: synthesis and application.
European Patent Bulletin 94 / 32, Publication number: 0 609 638 A1 ,10.08.1994
Weyers
Paterson N.W., Brook R.A. and Peng Z.Y. “Quantitative analysis of
the control of physiological phenomena by plant hormones”.Physiologia Plantamm,
1995,95,486-494
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