Seed germination and vegetative reproduction of some decorative species of the genus Lonicera (Caprifoliaceae), introduced into the Tashkent Botanical Garden (Uzbekistan)

Abstract

Under the conditions of Tashkent Botanical Garden of Uzbekistan, seed germination in laboratory conditions of promising ornamental species Lonicera tatarica L. and valuable medicinal species Lonicera japonica Thunb. has been studied. The optimal temperature for germination of seeds of both species under laboratory conditions is 20-22 °C, at which germination was 73 % for L. tatarica, 58 % for L. japonica. In greenhouse conditions at an air temperature of 20-22 °C and a relative humidity of 49-53 %, the rootability of L. tatarica cuttings was 75 %, of L. japonica - 93 %. It was revealed that the studied species adapted well to the introduction conditions. Given the effectiveness of vegetative propagation of L. tatarica and L. japonica, they can be recommended for improving the aesthetic condition and landscaping of cities, territories and landscape design. Due to intensive vegetative propagation by cuttings of the Lonicera japonica species, it is possible to supply the necessary raw materials for the pharmaceutical industry in the future.