Visn. Hark. nac. agrar. univ., Ser. Biol., 2018, Issue 1 (43), с. 57-65


Yu. V. Karpets, M. A. Shklyarevskiy, G. A. Lugova

Dokuchaev Kharkiv National Agrarian University
(Kharkiv, Ukraine)

The influence of donor of nitric oxide (NO) sodium nitroprusside (SNP) on resistance of plants of Scotch pine (Pinus silvestris L.) at the early stage of development against coniferous root rot disease have been investigated. Four-time spraying of seedlings with SNP solutions, which was carried out by each 10 days since 20th day from crops to the soil, significantly increased resistance of plants against root rot. The most noticeable positive effect was rendered by treatment of plants with SNP solutions in concentration of 0,2 and 0,5 mM, at which the quantity of not affected seedlings was by 5-6 times larger in comparison with control. In the same concentration the growth stimulating influence of SNP on healthy plants of pine was shown. Under the influence of spraying of seedlings with SNP solutions in concentration of 0,2, 0,5 and 2 mM the increase in content of chlorophyll and anthocyans, and also the tendency to increase of carotinoids amount were noted. The conclusion about prospects of use of treatment of pine seedlings with SNP for the increase in their resistance to root rot and intensifying of growth on early phases of development is made.

Key words: Pinus silvestris, coniferous root rot disease, nitric oxide, sodium nitroprusside, resistance, growth



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