Seasonal Changes of the Photosynthesis Activity and Green Pigments in Common Pine and Siberian Spruce under the Optimal and Extremal Wetting Conditions
G. G. Suvorova, M. V. Oskorbina, L. D. Kopytova, L. S. Yan'kova, E. V. Popova
Siberian Institute of Plant Physiology and Biochemistry SB RAS
suvorova@sifibr.irk.ru, suvorova@sifibr.irk.ru, suvorova@sifibr.irk.ru, suvorova@sifibr.irk.ru, suvorova@sifibr.irk.ru
Keywords: conifers, net photosynthesis, chlorophyll, environmental factors
Pages: 851-859
Abstract
Seasonal changes of the photosynthesis activity and the concentration of green pigments in the needles of common pine Pinus sylvestris L. and Siberian spruce Picea obovata Ledeb. depending on the environmental factors are studied. Under the extremely dry conditions, the daily maximal of photosynthesis are regulated by the level of water content in needles and the concentration of green pigments. Under optimal watering, the concentration of pigments depends on soil temperature. The efficiency of chlorophyll functioning under optimal watering is 2-6 times higher than under the dry conditions.
|
