Reflectance spectral features and detection of superficial scald-induced browning in storing apple fruit.
Chivkunova, O. B., Solovchenko, A. E., Sokolova, S. G., Merzlyak, M. N., Reshetnikova, I. V. and Gitelson, A. A.
Journal of Russian Phytopatholgical Society. 2001, vol. 2, 73–772001, vol. 2, pp. 73–77.
2001
บทคัดย่อ
Reflectance (R) spectra of apple cv. Antonovka Obyknovennaya fruits in the visible and near infrared ranges of the spectrum were studied during fruit storage. Specific spectral features of reflectance of healthy ripening fruits and those arising as a result of superficial scald development and browning induced artificially by n-hexane treatment were revealed and compared. Both superficial scald and n-hexane treatment brought about a strong decrease of reflectance, especially, in the green near 550 nm. During natural fruit ripening in the absence of superficial scald development, a high correlation was found between reflectances at 550 and 700 nm. In contrast, as a result of superficial scald development the close relationship between reflectances at 550 and 700 nm was lost. The revealed spectral signatures were used in developed reflectance index (1/R550-1/R700)/R750 for non-destructive superficial scald detection and estimation of its extent in storing apple fruit.