Apparent Changes in Rate of Kaurene Biosynthesis During the Development of Pea Seeds

Abstract

The seeds of several species have been shown to accumulate, during certain stages of development, much greater quantities of gibberellin (GA) than are found in the vegetative parts of older plants (2, 4, 12, 14, 15, 17, 19). Since the first definitive discovery that immature seeds are abundant sources of GA (15), there has been much active interest in the relationship between GA content and growtlh of seeds and fruits (2, 4, 12, 19), tlle possible role of GA's stored in seeds in the subsequent growth of seedlings developing from them (3, 11), anid the utility of cell-free enzyme extracts from inmmature seeds in investigations of GA biosynlthesis