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The possibility of using chlorophyll fluorescence for detecting internal quality of strawberry has been investigated. The mature fruit were marked and stored at 0 and 5 °C for 5, 10, and 15 days. After storage they were placed in the dark for 20 min and fluorescence measurement then was taken at the marked place with a fluorescence probe with a light intensity of 20 μmol·m –2 ·s –1 . Samples were also taken from the marked place for laboratory analysis to determine chlorophyll and total soluble solute content. Firmenss was detected by an Instron Universal Testing Machine taking measurement at the marked section of the fruit. Rot was detected visually. Multiple regression and simple correlation were detected between fluorescence and laboratory-analyzed data. Multiple correlation coefficient ( R ) ranged from 0.80 to 0.97. Simple correlation ( r ) ranged from 0.44 to 0.89. The results of this study indicated that chlorophyll fluorescence is capable of detecting internal quality of strawberry and may potentially extend to other fruits. Feasible applications of the method include packinghouse, sorting of fruits, and parent and progeny quality assessment in a strawberry breeding program.

441 Nondestructive Quality Evaluation in Strawberries by Means of Chlorophyll Fluorescence