Gibberellins and Antheridiogens in Prothallia and Sporophytes of Anemia phyllitidis.
Anahtar kelimeler
Öz
The following gibberellins (GAs) and antheridiogens were identified by their mass spectra and Kovats retention indices from combined gas chromatography-mass spectrometry of purified extracts of the prothallia and sporophytes of Anemia phyllitidis, a Schizaeaceous fern: a trace amount of GA9 (4-week-old prothallia); GA9, GA24, GA25, antheridic acid and 3-epi-GA63 (6-week-old prothallia); and GA4, GA9, GA15, GA19, GA20, and GA24 [young sporophytes (younger than one year old) and/or old sporophytes (between one- and two years old). Of these compounds, GA24, GA9, and GA4 were quantified by gas chromatography-selected ion monitoring, using (2)H-GAs as internal standards, and the content of antheridic acid, the principal antheridiogen, was evaluated by a radioimmunoassay which we have developed. The results indicate that endogenous levels of GAs and antheridiogens in prothallia began to increase rapidly between 4 and 6 weeks after sowing, the contents of antheridic acid and GA24, the most abundant GA in 6-week-old prothallia, being 107.4 and 37.9 ng/g fresh weight, respectively. The most abundant GA in the sporophytes was GA9, the content in young and old sporophytes being 15.3 and 7.3 ng/g fresh weight, respectively.