Abstract
Gibberellins (GAs) A17, A19, A20, A29, A44, 2βOH-GA44 (tentative) and GA29-catabolite were identified in 21-day-old seeds of Pisum sativum cv. Alaska (tall). These GAs are qualitatively similar to those in the dwarf cultivar Progress No. 9 with the exception of GA19 which does not accumulate in Progress seeds. There was no evidence for the presence of 3-hydroxylated GAs in 21 day-old Alaska seeds. Dark-grown shoots of the cultivar Alaska contein GA1, GA8, GA20, GA29, GA8-catabolite and GA29-catabolite. Dark-grown shoots of the cultivar Progress No.9 contain GA8, GA20, GA29 and GA29-catabolite, and the presence of GA1 was strongly indicated. Quantitation using GAs labelled with stable isotope showed the level of GA1 in dark-grown shoots of the two cultivars to be almost identical, whilst the levels of GA20, GA29 and GA29-catabolite were significantly lower in Alaska than in Progress No. 9. The levels of these GAs in dark-grown shoots were 102- to 103-fold less than the levels in developing seeds. The 2-epimer of GA29 is present in dark-grown-shoot extracts of both cultivars and is not thought to be an artefact.
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Abbreviations
- cv:
-
cultivar
- GAn :
-
gibberellin An
- GC:
-
gas chromatography
- GC-MS:
-
combined gas chromatographymass spectrometry
- HPLC:
-
high-pressure liquid chromatography
- KRI:
-
Kovats retention index
- MeTMSi:
-
methyl ester trimethylsilyl ether
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Gaskin, P., Gilmour, S.J., MacMillan, J. et al. Gibberellins in immature seeds and dark-grown shoots of Pisum sativum . Planta 163, 283–289 (1985). https://doi.org/10.1007/BF00393519
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DOI: https://doi.org/10.1007/BF00393519