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Information Journal Paper

Title

EFFECTS OF THE PLANT STEROIDAL HORMONE, 24-EPIBRASSINOLIDE AND STORAGE MOISTURE, ON THEPOST-HARVEST CHARACTERISTICS OF THOMSON NAVEL SWEET ORANGE FRUIT

Pages

 Start Page 439 | End Page 452

Abstract

 Non-Chilling Peel Pitting (NCPP) is a physiological post-harvest and storage disorder, in many citruspeels. The purpose of this study, was to determine the effects of the steroidal plant hormone, 24-epibrassinolide (0, 5 and 10 mg L-1) and relative humidity at the dry storage (RH=30% and 20 º C)compared with normal (RH=70% and 6 º C), on the shelf life of Thomson-Novel sweet orange. Theexperiment was performed as a factorial arrangement in Completely Randomized Design (CRD) duringwinter of 2015in 30 days with three replicates and 10 samples. In this Research characteristics of fruitsuch as weight loss, NCPP, open STOMATA, total soluble solids, titrable acid, leakage, CATALASE andMalondialdehyde activity investigated. The results indicated that weight loss (9. 67%), NCPP (33. 3%code) and CATALASE activity (0. 13682) in fruits peel significantly increased under drough stress. Maintenance of fruits in dry environments causes a reduction in the open STOMATA of skin from 55. 3 to36. 1%, which improved using 24-epibrassinolide, as well in normal storage (51. 1%). According to theresults, 5 mg L-1 24-epibrassinolide concentration was recommended considering its reduction effects onweight loss rate, NCPP and CATALASE activity in fruits skin.

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