Species differences in the content of photosynthetic pigments in plants of arid territories of the South of Russia

Abstract. The purpose is to study the features of adaptive reactions pigment system plants in stress conditions Astrakhan region. In role diagnosing state plants, physiological and biochemical indicators are used, which reflect body's ability adapt changing environmental conditions. Methods. studies, methods observation, description objects study, spectrophotometric determination quantitative content photosynthetic pigments, statistical analysis were used. Results. Features chlorophyll a b, carotenoids, as well ratio values amount chlorophylls carotenoids revealed. calculation linear Pearson correlation coefficient between leaves average daily temperature daylight hours was carried out. It established that maximum observed tamarix, minimum noted saxaul. largest b teresken, smallest highest tamarix (0.59 mg/g dry weight), little less teresken (0.54), its saxaul (0.12) juzgun (0.29). studied species, ranged from 2.9 6.5, saxaul, juzgun. potential photochemical activity decreases series > revealed value for (2.9). Scientific novelty. New knowledge obtained on resistance adverse external factors region terms parameters – chlorophyll, hours, made it possible assess compile following species: tamarix.