Liečivé rastliny v meniacich sa environmentálnych podmienkach

Vliv abiotických a biotických stresorů na vlastnosti rostlin 11.5.2005
TOLERANCE OF SOME FIELD CROPS TO TEMPERATURE STRESS
Key words: fast fluorescent induction, energy balance of the photosynthesis, wheat, pea, hops,
bean, sugar beet
Summary
Paper represents an effort of evaluating the impact of t o C stress measured by the method of fast
fluorescence, on energy balance of photosynthesis. Experiment was carried out with spring wheat, bean, pea,
sugar beet and hops. Main changes described in fields and the yield of PS are evaluated to calendar date
without the impact of biologic age. But parallelly more precise experiment with temperature stress (1hour -
5°C, 20°C,as 35°C) was studied in clima box with the same field crops.
Main changes, realised in a fraction of second, had basic importance in binding of emissive photon
energy and their conversion on chemical energy of storage substances e.g. saccharides and others.
Temperature had significant impact on crop productivity and yield. Results obtained, show that cold stress is
better tolerated by majority of plants, but damages caused by high temperatures are frequent The method of
fast fluorescent induction is exploitable for studying of stress But it is necessary to give the care during the
interpretation of results from a point of view of phluorimetr ability.
Poděkování
Tyto výsledky jsou součástí projektu financovaného výzkumným záměrem MSM 60460709/01 CZU
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