TITLE

Effect of jasmonic acid on morphogenesis and photosynthetic pigment level in Arabidopsis seedlings grown under green light

AUTHOR(S)
Golovatskaya, I. F.; Karnachuk, R. A.
PUB. DATE
March 2008
SOURCE
Russian Journal of Plant Physiology;Mar2008, Vol. 55 Issue 2, p220
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The role of jasmonic acid (JA) in plant photomorhogenesis under green light (GL) was studied. The effect of GL of different intensity (8.1 and 18.1 W/m2) with or without 1 µM JA treatment on growth of plants and photosynthetic pigment level was compared for two types of Arabidopsis thaliana (L.) Heynh. Landsberg erecta ecotype plants: L er, the wild type, and hy4, a mutant. A much more pronounced growth of hypocotyls and cotyledons of L er plants in GL was observed compared to that of hy4 with suppressed cryptochrome 1 (cry1), a GL photoreceptor. Treatment with JA in GL caused retardation of hypocotyl and cotyledon growth of L er plants; however, it stimulated their growth in hy4 plants. JA reduced the chlorophyll a and total carotenoids levels in cotyledons of Arabidopsis plants in GL. Blocked GL signal transduction due to the absence of cry1 in hy4, as well as the higher intensity of GL reduced the negative effect of exogenous JA on growth of cotyledons and photosynthetic pigments. The data obtained provide a basis for discussion of interaction between the JA and GL signals in the growth regulation controlled by cry1.
ACCESSION #
31642916

 

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