NATURAL SCIENCES

Journal of fundamental
and
applied researches

Morphological and physiological adaptation featuresof Valeriana tuberosa L. to growth In the steppe zone of Kalmykia

2013. №2, pp. 56-62

Dordzhieva Viktoriya I.  - Ph.D. (Biology), Associate Professor, Kalmyk State University, 11 Pushkin St., Elista, 358000, Republic of Kalmykia, Russian Federation, estnauki2009@rambler.ru

Voloshina Tatyana V.  - Ph.D. (Biology), Associate Professor, Kalmyk State University, 11 Pushkin St., Elista, 358000, Republic of Kalmykia, Russian Federation, estnauki2009@rambler.ru

Dzhapova Raisa R.  - D.Sc. (Biology), Professor, Kalmyk State University, 11 Pushkin St., Elista, 358000, Republic of Kalmykia, Russian Federation, djapova04@mail.ru

Ayusheva Yelena Ch.  - post-graduate student, Kalmyk State University, 11 Pushkin St., Elista, 358000, Republic of Kalmykia, Russian Federation, estnauki2009@rambler.ru

Valeriana tuberosa is the only representative of the genus, storing nutrients in the tubers, staring a high rate of growth, the plant completes vegetative phase by the end of April and goes to bloom. Morphological and physiological adaptation beatures of Valeriana tuberosa to growth in a turf and grassy steppe subzone of Kalmykia are marked. The lack of photosynthetic surface out of several leaves on the shoot compensated by on the account of clearly expressed сhlorenhima under epidermis of the stem. Reduction of linear parameters individual cells with simultaneous reinforcing of leaf lobing and thickening of the cuticle on their surface is due to their development in the conditions of increasing water deficiency. Valeriana tuberosa is characterized by high water content of tuber tissue, rather high transpiration, intense growth processes, resulting in the biomass accumulation.

Key words: Valeriana tuberosa,ephemeroid,adaptation,geterofilliya,chlorenhima,sclerenchyma,water content of tissues transpiration,spatial distribution