Abstract
In our hands a phosphate buffered celite column has given an adequate separation of GA1 and GA3. These 2 gibberellins are normally very difficult to separate. Young sugarcane growing under moisture stress contains at least 2 gibberellin-like substances. One is suspected to be GA5. The other is unknown but has high activity in the barley endosperm assay and is neither GA1 nor GA3. Four-month-old cane contains 2 major growth promoters. From their chromatographic, fluorimetric and biological properties these are thought to be GA1 and GA3. Rapidly growing 6-month-old cane has a surprisingly low level of gibberellin-like substances.
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Selected References
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