Author/Editor		Regvar, M; Gogala, N; Žnidaršič, N
Title		Jasmonic acid affects mycorrhization of spruce seedlings with Laccaria laccata
Type		članek
Source		Trees
Vol. and No.		Letnik 11
Publication year		1997
Volume		str. 511-4
Language		eng
Abstract		Jasmonic acid (JA) was shown to be an important regulating molecule after wounding and pathogen attack, but it also conveys mycorrhizal signalling. It was therefore applied to the ectomycorrhizal system. Root growth patterns of 2-month-old spruce seedings mycorrhized with Laccaria laccata after treatment with 0.5 micro M JA, 5.0 micro M JA, or none for the control, were studied using a paper-sandwich technique. Changes in plant weight, root lenght, the degree of branching, presence of root hairs, and infection parameters were monitored for 26 days. Data were analysed by means of Student's t-test and ANOVA factorial. Shoot and root dry weights were significantly increased by mycorrhizal infection, especially when JA was applied. Lateral root formation and the presence of roots with hairs were dramatically decreased in the presence of the fungus. A synergistic effect of JA and mycorrhization on decrease of lateral root length was shown. The first mycorrhizal contact of fungal hyphae with roots was significantly accelerated after treatment with JA.
Descriptors		TREES PLANT ROOTS PLANT GROWTH REGULATORS FUNGI SYMBIOSIS