Abstract

ABSTRACT Both 337- and 405-nm excitations of steady-state fluorescence of seeds of the spiny gourd or teasle gourd show bands in blue, green, and red regions in raw and ripe stages. Fluorescence intensity ratios F670/F630 and F630/F460 calculated for the two stages show marked variation—a clear indication of the process of ripening of the fruit. Time-resolved measurements, in the 405-nm excitation, for the peaks at the blue-green and red regions of raw and ripe seeds reveal variations in decay times for the blue-green region, while those in the red region show no difference.

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