Effect of Stratification and Gibberellin on Seed Germination in Ginkgo biloba

The effects of stratification and exogenous gibberellic acid on seed germination in Ginkgo biloba were followed for a 12-week period. Most nonstratified seeds either remain dormant or decompose during this period, while nearly 100% of stratified seeds germinate within 7-10 weeks. Removal of the hard...

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Bibliographic Details
Published in:Bulletin of the Torrey Botanical Club 1970-11, Vol.97 (6), p.380-384
Main Authors: West, W. Charles, Frattarelli, Francesca J., Russin, Karen J.
Format: Article
Language:English
Subjects:
Barley
Bioassay
Embryos
Endosperm
Gametophytes
Germination
Gibberellins
Room temperature
Seeds
Testa
Torreya
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Summary:The effects of stratification and exogenous gibberellic acid on seed germination in Ginkgo biloba were followed for a 12-week period. Most nonstratified seeds either remain dormant or decompose during this period, while nearly 100% of stratified seeds germinate within 7-10 weeks. Removal of the hard portion of the seed coat produces only a slight enhancement in germination of nonstratified seeds. Exogenous application of gibberellic acid to nonstratified seeds enhances germination to a level that approaches that of stratified seeds. Barley endosperm bioassay data of ethyl acetate extractable gibberellins from Ginkgo embryos indicate that stratified embryos contain approximately 100 times more GA3equivalents than nonstratified embryos. It is concluded that stratification and gibberellin metabolism are related in the germination of Ginkgo seeds, and that exogenous GA3will largely substitute for stratification in nonstratified seeds to promote germination.
ISSN:0040-9618
2325-8055
DOI:10.2307/2483859