AMEA Botanika Ġnstitutunun elmi əsərləri, 2015-ci il, XXXV cild
172
SUMMARY
ADAPTIVE CHANGES IN SYNTHESIS OF NITROGENOUS
SUBSTANCES AND PROTEINASE ACTIVITY IN PLANTS CAUSED
BY STRESSORS (NaCl, Pb)
A.J.Samedova, T.S. Shirvani, I.T. Piriyev, M.A. Annagiyeva M.A.,
G.Kh.
Babayeva, N.M.
Rustamova, V.M.
Ali-zade
Institute of Botany, ANAS
At the different vegetative periods of plants (7, 14 and 21 days) the synthesis of nitrogenous
substances and activities of proteinases are studied in the roots, seminal and true leaves of pumpkin plants
grown in Knop solution (0.5 n) and are subjected to separate or combined action of two abiotic stressors
(NaCl and Pb). A more strong negative influence of both stressors was revealed in the biomass
accumulation (dry and fresh) in the overground organs as compared to the roots already from the initial
times of plant vegetation (7 days). In 21-day plants affected only by Pb as compared with the plants treated
by NaCl and Pb together (in which a sharp physiological disorder is observed), a rising of proteinase
activities and some activation in the protein synthesis, an increases in a ratio of protein nitrogen to non-
protein one – all this reduced the toxicity of lead and provided an adaptation of plants to its surplus.
Key words: nitrogenous
substances, pumpkin, lead,
sodium chloride,
proteolytic activity, stress.
