ISSN:
1573-5087
Keywords:
Cytokinins
;
celery seeds
;
polyethylene glycol
;
gibberellins
;
ethephon
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Celery seeds were less thermoinhibited when dried back after a seed soak treatment with the gibberellins A4 and A7 (GA4/7) plus ethephon (G+E) or an osmotic priming treatment in the light with polyethylene glycol (PEG). At temperatures between 18 and 25° in the dark, 50 percent of the PEG-treated seeds germinated after 3 days whereas G+E-treated seeds required 7 days and untreated seeds did not germinate at all. Irrespective of treatment, dry control and dried-back, treated seeds contained very little detectable cytokinin activity. However, when such seeds were imbibed for 18 h in the dark and then analysed immediately with the soybean callus bioassay, less cytokinin activity was detected in both G+E and PEG seeds than in the untreated seeds. In particular, cytokinins with the HPLC properties of zeatin and its riboside were decreased in G+E seeds and virtually absent from PEG seeds. Conversely, extracts from PEG and to a lesser extent G+E seeds contained activity which chromatographically resembled cytokinin glucosides whereas this was absent from untreated seeds.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00024861
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