Endogenous Gibberellins from Sporophytes of Two Tree Ferns, Cibotium glaucum and Dicksonia antarctica.

Abstract:

:Gibberellin A(1) (GA(1)), 3-epi-GA(1), GA(4), GA(9), 11alpha-hydroxyGA(12), 12alpha-hydroxyGA(12), GA(15), GA(17), GA(19), GA(20), GA(25), GA(37), GA(40), GA(58), GA(69), GA(70), and GA(71) have been identified from Kovats retention indices and full scan mass spectra by capillary GC-MS analyses of purified extracts from sporophytes of the tree fern, Cibotium glaucum. Abscisic acid, dihydrophaseic acid, an epimer of 4'-dihydrophaseic acid, and the epimeric ent-6alpha, 7alpha, 16alpha, 17-(OH)(4) and ent-6alpha, 7alpha, 16beta, 17-(OH)(4) derivatives of ent16, 17-dihydrokaurenoic acid, in addition to the epimeric 16alpha, 17- and 16beta, 17-dihydroxy-16, 17-dihydro derivatives of GA(12), were also identified in extracts of C. glaucum. An oxodihydrophaseic acid and a hydroxydihydrophaseic acid were also detected. In extracts of sporophytes of Dicksonia antarctica, GA(4), GA(9), 12alpha- and 12beta-hydroxyGA(12), GA(15), GA(25), and GA(37) were identified by the same criteria, as well as abscisic acid, phaseic acid, 8'-hydroxymethylabscisic acid and dihydrophaseic acid. This is the first time that GA(40) has been identified in a higher plant; it is also the first report of the natural occurrence of the two gibberellins, 11alpha- and 12beta-hydroxyGA(12). The total gibberellin (GA) content in C. glaucum (tall) was at least one order of magnitude greater than that of D. antarctica (dwarf) based on total ion current response in GC-MS and bioassay data. Abscisic acid was a major component of D. antarctica and the oxodihydrophaseic acid was a major component of C. glaucum.

journal_name

Plant Physiol

journal_title

Plant physiology

authors

Yamane H,Fujioka S,Spray CR,Phinney BO,Macmillan J,Gaskin P,Takahashi N

doi

10.1104/pp.86.3.857

subject

Has Abstract

pub_date

1988-03-01 00:00:00

pages

857-62

issue

3

eissn

0032-0889

issn

1532-2548

journal_volume

86

pub_type

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