Abstract
Summary The effect of 2-(4-chlorophenylthio) ethyl-diethylammonium chloride (CPTA) on the carotenoid composition of Rouge de Marmande and high-beta tomato fruits stored at 20° and 30°C is examined. High-temperature (30°C) inhibits lycopene formation in untreated Rouge de Marmande fruits, and they ripens to a yellow colour in contrast to the pinkish yellow colour of the CPTA-treated fruits. The formation of β-carotene is greatly inhibited in the CPTA-treated high-beta fruits, and lycopene is accumulated at the expense of β-carotene. It is suggested that in high-beta fruit CPTA may regulate the carotene synthesis in a manner similar to β+ and mβ+ alleles.
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