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Effect of Geographical Location on Physical Characteristics and Chemical Compositions of Newhall Navel Orange (Citrus sinensis (L.) Osbeck)

HU Deyu1,2, LIAO Qiuhong1,2, XIE Rangjin2, HE Shaolan2, QIAN Chun1, LÜ Qiang2, YI Shilai2, ZHENG Yongqiang2, DENG Lie2,*   

  1.  1. College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400715, China;
    2. Citrus Research Institute, Southwest University, Chinese Academy of Agricultural Sciences, Chongqing 400712, China
  • Online:2015-10-15 Published:2015-10-20

Abstract:

The aim of this study was to investigate the effect of geographical origin on physical characteristics and chemical
compositions of Newhall navel oranges from different areas. Samples from 17 growing areas in China indicated significantly
differences in physical characteristics and chemical compositions, including fruit weight, total soluble solid (TSS) content,
titratable acidity (TA), sugar components, organic acids, mineral elements and amino acids. Correlation analysis revealed
obvious variations among geographical origins allowing successful differentiation of Newhall navel orange according to their
quality characteristics and organic components. TSS content very significantly correlated with mean annual temperature,
annual rainfall and sunshine hour. TA and vitamin C were closely associated with mean annual temperature and sunshine hour.
Additionally, Mineral contents and amino acid composition as useful chemical parameters also revealed significant differences
among different locations. Significantly negative correlation of Arg and Asp contents with sunshine hour as well as annual
rainfall was found for pulp but not peel; Lys in peel showed highly significant correlation with relative humidity.

Key words: Navel orange, geographical location, quality index, mineral element, amino acid

CLC Number: