Biology of seeds of some representatives of the genus Hemerocallis L.

УДК 582.572.2:581.48

Abstract

The results of studying the morphology and germination of seeds of 7 species of the genus Hemerocallis L. (H. citrina, H. dumortieri, H. esculenta, H. lilioasphodelus, H. middendorfii, H. minor and H. thunbergii) introduced in the conditions of the forest-steppe zone of the Bashkir Cis-Ural are presented. The morphology of seeds (color, shape, size) is described. It is shown that the seeds are round-ovoid, slightly angular, black, glossy, shiny; surface is flat and smooth. The average value of seed length in species varied from 4,5 to 6,4 mm, width - from 3,1 to 4,7 mm. A morphometric difference in the size and weight of seeds from different populations was revealed. The studied features are of taxonomic significance and can be used to determine the species of daylilies. It is noted that the seeds of the studied species are characterized by shallow endogenous physiological dormancy. It was revealed that the indicators of seed germination depend on the species characteristics and germination conditions. In general, the germination rate of the species was 8,3-95,0 %. It was established that after 60 days of seed stratification at a temperature of 3-4 °C, the germination rate in most daylilies increased by 1,2-1,8 times. The results obtained can be used in breeding and ontogenetic studies during the introduction of representatives of the genus complex Hemerocallis.