Effects of Lepidimoide on Growth and Development of Arabidopsis thaliana

Abstract

Lepidimoide secreted from seeds of cress, Lepidium sativum L. increased to varying hypocotyl lengths, number of rosette leaves, plant height, plant mass (fresh and dry weight at maturation), and seed production in several wild-types of Arabidopsis thaliana. The substance accelerated flowering without reducing the number of rosette leaves. The degree of response to lepidimoide differed greatly among the wildtype lines: for the hypocotyl growth the greatest effect appeared in lines Enkheim and Can-0. The development of rosette leaves was enhanced in lines Enkheim, C24 and Can-0. The leaf area of lines WS and Enkheim was enlarged. The flowering time was hastened most in lines C24 and Cl-0. Lines Zü-0 and Can-0 did not flower after 75 days of culture regardless of lepidimoide treatment, although the plant size was markedly enlarged by this substance. Among the popular lines in recent molecular and physiological studies, WS and Columbia were sensitive, but Landsberg (erecta) was generally insensitive to lepidimoide.