Open AccessIdentification of Endogenous Gibberellins in Dormant Bulbils of Chinese Yam, Dioscorea opposita
Author(s) -
Noriaki Tanno,
Takao Yokota,
Mai Abe,
Nobuo Okagami
Publication year - 1992
Publication title -
plant physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.554
H-Index - 312
eISSN - 1532-2548
pISSN - 0032-0889
DOI - 10.1104/pp.100.4.1823
Subject(s) - dioscorea , gibberellin , dormancy , dioscoreaceae , hydroxylation , chemistry , endogeny , botany , dioscorea rotundata , biochemistry , biology , germination , enzyme , medicine , alternative medicine , pathology
It is known that dormancy of the genus Dioscorea is induced by application of gibberellin (GA) A(3). To understand the role of GAs in dormancy induction, endogenous GAs have been identified by Kovats retention indices and full mass spectra from capillary gas chromatography-mass spectrometry analysis of purified extract from dormant bulbils of Dioscorea opposita Thunb. These include GA(4), GA(9), GA(12), GA(19), GA(20), GA(24), GA(36), and GA(53); their presence suggests the occurrence of two biosynthetic pathways in D. opposita bulbils, the early 13-hydroxylation pathway and the non-13-hydroxylation pathway.