International Journal of Botany Studies


ISSN: 2455-541X

Vol. 3, Issue 2 (2018)

Phytohormone-like effect of pyrimidine derivatives on regulation of vegetative growth of tomato

Author(s): Victoria Tsygankova, Yaroslav Andrusevich, Olexandra Shtompel, Victor Kopich, Roman Solomyanny, Olga Bondarenko, Volodymyr Brovarets
Abstract: Tomato (Solanum lycopersicum L.) is a majoragricultural crop cultivated over the world. The elaboration of new effective plant growth regulators for improving growth of tomato is an important task for plant biotechnology. In the present work the comparative effect of plant hormones auxins IAA and NAA, cytokinin Kinetin, and new synthetic compounds pyrimidine derivatives on acceleration of vegetative growth of tomato was studied. The obtained biometric indices of 24th-day-old tomato seedlings grown on the water solution of pyrimidine derivatives used at the concentration 10-8M were similar or higher of the biometric indices of tomato seedlings grown on the distilled water (control), or on the water solution of IAA, NAA and Kinetin used at the same concentration 10-8M in average: at the 29-255 %, 22-235 %, 10-156 %, and 13-95 % - by total number of roots, and at the 23 - 255 %, 21-115 %, 19-138 %, and 9-61 % - by total length of roots, respectively. The content of photosynthetic pigments in tomato seedlings grown on the water solution of pyrimidine derivatives was increased in average: chlorophyll a - at the 17-116 %, 17-122 %, 19-22 %, and 19-52 %; chlorophyll b - at the 19-155 %, 21-161 %, 12-45 %, and 11-81 %; chlorophylls a+b - at the 16- 126 %, 13-132 %, 23-28 %, and 14-60 %; carotenoids - at the 15-86 %, 19-107 %, 20-31%, and 16-50 %, as compared with similar indices of tomato seedlings grown on the distilled water (control), or on the water solution of IAA, NAA and Kinetin, respectively. The content of total soluble proteins in tomato seedlings grown on the water solution of pyrimidine derivatives was increased in average: at the 40-241 %, 9-145 %, 15-122 %, and 17-123 %, as compared with similar indices of tomato seedlings grown on the distilled water (control), or on the water solution of IAA, NAA and Kinetin, respectively. The relationship between chemical structure and plant growth regulatory activity of pyrimidine derivatives was set. The highest growth regulatory activity revealed the compounds, derivatives of dihydroimidazo[1,2-c]pyrimidine. The obtained results confirmed the possibility of application of pyrimidine derivatives as new effective regulators of vegetative growth of tomato.
Pages: 91-102  |  947 Views  387 Downloads
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