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The effect of stratification on endogenous cytokinin levels in seeds ofAcer saccharum

✍ Scribed by J. Staden; D. P. Webb; P. F. Wareing

Publisher
Springer-Verlag
Year
1972
Tongue
English
Weight
245 KB
Volume
104
Category
Article
ISSN
0032-0935

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✦ Synopsis

Stratification of sugar maple seed resulted in high levels of eytokinins after 20 days. A further increase in the chilling period led to a decrease in cytokinins. Most of the cytokinin activity detected was due to compound(s) that co-chromategraphed with zeatin.

It is concluded that this increase in cytokinins may result in the breaking of dormancy, perhaps by overcoming the effect of endogenous inhibitors.

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Exposure of Rumex obtusifolius seed to red light resulted in a rapid increase in extractable cytokinins. This increase can be reversed if the red light treatment is immediately followed by far-red irradiation. In germinating seed hardly any cytokinin activity could be detected in the butanol and aqu