Интенсивность фотосинтеза и транспирации в онтогенезе яровой пшеницы в связи с освещенностью и температурой
2010
Davydov, V.A., Russian Academy of Sciences. Siberian Branch, Irkutsk (Russian Federation). Siberian Inst. of Plant Physiology and Biochemistry
During vegetation period the author determined the value of photosynthesis (PA) and transpiration (TA) activity in spring wheat of the Skala variety and estimated the coefficients of linear correlation between these processes and also between meteorological factors (light and air temperature). The most high PA and TA per 1 g of mass was during beginning of bushing out stage, counting on shoot—blooming phase, when for bright day the shoot fix about 360 mg of CO2. For vegetation period the main shoot transpires about 700-800 ml of water and assimilates 20-25 mg of CO2, about 30% of which transforms to shoot and 5-7% to corn biomass. During the first half of the vegetation the author finds close connection between indicated processes and factors of environment, towards the end of the vegetation the correlation was slacken. The similar tendency was revealed for the pair of PA—air temperature. For TA the correlation between light and temperature has a no single meaning.
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