The seed quality of Deutzia Thunb. in the conditions of the Bashkir Urals

Representatives of the genus Deutzia are widely used in decorative gardening in European countries. In regions with a more severe climate, the plants are less viable. Probably for this reason, this crop is poorly studied and practically not used in landscaping in northern latitudes. However, a small group of species of the genus Deutzia has broad adaptive properties when grown in new climatic conditions. Therefore, at the moment there is a need to assess the quality of seeds of some types of action in the conditions of the Southern Urals. The aim of the work is to identify the characteristics of the quality of seeds of resistant species of the genus Deutzia for cultivation in the Southern Urals. The material for the study was the seeds of 3 species of deuterium cultivated in the South Ural Botanical Garden-Institute of the UFIC RAS and most adapted to the climate of the area of introduction: D. parviflora Bge., D. parviflora var. amurensis Rgl., D. glabrata Kom. The seasonal rhythm of plant development was studied according to the generally accepted method of phenological observations; winter hardiness was determined on a 7-point scale of the Main Botanical Garden of the Russian Academy of Sciences; seed weight was determined by weighing: the result was the average weight of 3 canopies of 1000 pieces; seed germination and germination energy were determined according to GOST. The seeds of the studied species of deuterium are approximately the same and average 0.03 g, but the seed weight of D. parviflora var. amurensis is slightly lower compared to the other two species. Laboratory and soil germination in D. parviflora has maximum parameters (about 67%), also in this species the maximum germination energy is noted (31%), the minimum values of this indicator are recorded in Deutzia glabrata (15%). The laboratory germination of seeds after 1 year of storage remains relatively high, but after 2 years of storage it decreases sharply, and after 3 years the seeds no longer germinate. Thus, the studied types of actions are promising for introduction into culture and wide application in landscaping of settlements of the Republic of Bashkortostan.

Deutzia, ornamental shrubs, seeds, mass, winter hardiness, germination, germination energy, seasonal rhythm of development, landscaping, Republic of Bashkortostan