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RESEARCH NOTE
Author(s) -
Baraldi Rita,
Bertazza Gianpaolo,
Bogino Judit,
Luna Virginia,
Bottini Ruben
Publication year - 1995
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1995.tb08732.x
Subject(s) - abscisic acid , elongation , shoot , gibberellin , phytochrome , endogeny , auxin , pigment , chemistry , botany , horticulture , biology , biochemistry , red light , organic chemistry , materials science , gene , metallurgy , ultimate tensile strength
— The endogenous levels of indole‐3‐acetic acid (IAA), abscisic acid (ABA) and gibberellins (GA) were examined by gas chromatography‐mass spectrometry in Prunus cerasus plantlets grown under different light conditions in relation to previous work on the photocontrol of stem elongation. The endogenous levels of free and conjugated IAA in the apical sections of red‐grown shoots were about two‐fold higher than those in the blue‐treated plants, and these corresponded with maximum shoot elongation. By contrast, greater concentrations of ABA and GA were found in blue‐grown plants compared to red with intermediate shoot growth. When blue was combined with red or far red, lower levels of IAA, ABA and GA correlated with less growth. These results suggest that the regulation of stem elongation by phytochrome and a blue‐absorbing pigment may, at least in part, occur through a modulation of hormone levels.