Differential response of zucchini varieties to low storage temperature |
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Authors: | F. Carvajal C. Martinez M. Jamilena D. Garrido |
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Affiliation: | 1. Department of Plant Physiology, Facultad de Ciencias, University of Granada, Fuentenueva s/n, 18071 Granada, Spain;2. Department of Applied Biology, Escuela Superior de Ingeniería, University of Almería, La Cañada de San Urbano s/n, 04120 Almería, Spain |
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Abstract: | Several parameters related to cold damage in zucchini have been measured in fruits from different varieties cultivated in the province of Almería (south-eastern Spain). The purpose of this work is to correlate physiological parameters with commercial quality and chilling damage, in order to establish reliable criteria for selecting varieties having better genetic adaptation to low-temperature storage. The results show that, for varieties harvested during February, the variety Natura was the best adapted to storage at 4 °C, as its fruits suffered less from chilling injuries, had a lower weight loss, and the levels of metabolites malonyldialdehyde and H2O2 were not as high as in the other varieties. Genetic variation was detected for some of the parameters analysed. The positive correlation among the levels of MDA, H2O2, and chilling injury, as well as the negative correlation among catalase and chilling injury, makes these parameters good indicators of chilling damage in our system. |
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Keywords: | APX, ascorbate peroxidase CAT, catalase CI, chilling injury MDA, malonyldialdehyde PG, polygalacturonase PME, pectin methylesterase POD, peroxidase PVPP, polyvinylpolypyrrolidone ROS, reactive oxygen species SOD, superoxide dismutase TBA, 2-thiobarbituric acid TBARS, thiobarbituric acid reactive substances TCA, trichloroacetic acid |
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