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- Title
A NOTE ON THE GERMINATION OF NARCISSUS BULBOCODIUM L.
- Authors
Thompson, P. A.
- Abstract
Seeds of Narcissus bulbocodium were exposed to a series of successive temperature treatments involving transfers between incubators and thermogradient bars. Freshly harvested seeds were dormant and failed to germinate at any temperature over the range 3-38°C. A conditioning treatment at 26°C applied to imbibed seeds induced changes which resulted in rapid germination of very high proportions of seed after transfer to temperatures between 5 and 16°C. A conditioning treatment at 16°C was less effective, and at 6°C was practically ineffective. It is suggested that the seed is protected from premature germination under natural conditions by high summer temperatures which themselves act as conditioning treatments and induce the changes which result in rapid spontaneous germination as temperatures fall in autumn at the start of the winter rains.
- Subjects
NARCISSUS bulbs; GERMINATION; TEMPERATURE control; PLANT metabolism; TEMPERATURE measurements; PLANT physiology research
- Publication
New Phytologist, 1977, Vol 79, Issue 2, p287
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/j.1469-8137.1977.tb02207.x