Thermostability of plants in various light conditions of cultivation

Elena Zavorueva

doi:10.1117/12.606348

15 December 2004 Thermostability of plants in various light conditions of cultivation

Elena Zavorueva

Proceedings Volume 5743, Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; (2004) https://doi.org/10.1117/12.606348
Event: Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2004, Tomsk, Russian Federation

Abstract

At various levels of PHAR with the help of measurement of parameters of a slow induction of chlorophyll fluorescence at 682 and 734 nm in light culture conditions the thermostable estimation of cenosises of plants of wheat and radish in reply to action of the raise and damaging temperatures of air (35°C 20 hours, 45°C 7 hours) is carried out. Without dependence from a level of light exposure, the exposition of cenosises at 35°C did not result in irreversible changes of the photosynthetic device of plants. The minimal damage of cenosises of wheat and radish at influence of temperature of 45°C is observed at 150W/m² of PHAR, and maximal - at intensities, close to a level of a compensatory point of photosynthesis of cenosises (50-70 W/m² PHAR at a temperature of air of 24°C). The index of viability is most sensitive parameter in comparison with other parameters determined by a method of a slow induction of fluorescence at 682 and 734 nm. The character of its change in reply to action of the stress-factor coincides with changes of intensity of photosynthesis researched of cenosises.

Citation Download Citation

Elena Zavorueva "Thermostability of plants in various light conditions of cultivation", Proc. SPIE 5743, Eleventh International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, (15 December 2004); https://doi.org/10.1117/12.606348

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