Abstract
In studies of the effect of long or short-day photoperiod treatments on the qualitative gibberellin (GA) content of mature leaves of a facultative short-day (SD) strawberry cultivar (Fragaria × ananassa Duch. cv. Elsanta), GA1, GA8, GA17, GA19, GA20, GA29 and GA44 were identified by full-scan gas chromatography - mass spectrometry (GC-MS) in extracts from plants grown under long-day (LD) conditions, and GA1, GA5, GA8, GA19, GA20 and GA29 in similar extracts from plants subjected to eight SD cycles after growth under LD conditions. The early 13-hydroxylation GA biosynthetic pathway thus appeared to predominate, with the apparent absence of GA5 in LD and of GA17 and GA44 in SD extracts providing evidence of modulation of this pathway by photoperiod. A search, including GC-MS with selected ion monitoring, failed to detect GA3, or the polyhydroxylated GA85, GA86, GA87 or GA32 for which some extracts were specifically purified.
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This paper is respectfully dedicated to the memory of Gordon Browning, who died suddenly on the 1st July, 1993. He will be sorely missed, both as a friend and colleague.
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Taylor, D.R., Blake, P.S. & Browning, G. Identification of gibberellins in leaf tissues of strawberry (Fragaria × ananassa Duch.) grown under different photoperiods. Plant Growth Regul 15, 235–240 (1994). https://doi.org/10.1007/BF00029896
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DOI: https://doi.org/10.1007/BF00029896