Phenolic compositions and antioxidant attributes of leaves and stems from three inbred varieties of Lycium chinense Miller harvested at various times

Shih-Chuan Liu; Jau-Tien Lin; Chao-Chin Hu; Bo-Yan Shen; Ting-Yo Chen; Ya-Ling Chang; Chia-Huing Shih; Deng-Jye Yang

doi:10.1016/j.foodchem.2016.06.072

Phenolic compositions and antioxidant attributes of leaves and stems from three inbred varieties of Lycium chinense Miller harvested at various times

Food Chem. 2017 Jan 15:215:284-91. doi: 10.1016/j.foodchem.2016.06.072. Epub 2016 Jun 22.

Authors

Shih-Chuan Liu¹, Jau-Tien Lin², Chao-Chin Hu¹, Bo-Yan Shen¹, Ting-Yo Chen², Ya-Ling Chang³, Chia-Huing Shih³, Deng-Jye Yang⁴

Affiliations

¹ Department of Health Diet and Industry Management, Chung Shan Medical University, and Department of Nutrition, Chung Shan Medical University Hospital, 110, Sec. 1, Jianguo N. Road, Taichung City 40201, Taiwan.
² Department of Medical Applied Chemistry, Chung Shan Medical University, and Department of Medical Education, Chung Shan Medical University Hospital, 110, Sec. 1, Jianguo N. Road, Taichung City 40201, Taiwan.
³ Miaoli District Agricultural Research and Extension Station, Council of Agricultural, Executive Yuan, 261, Guannan, Gongguan Township, Miaoli County 36346, Taiwan.
⁴ Department of Health Diet and Industry Management, Chung Shan Medical University, and Department of Nutrition, Chung Shan Medical University Hospital, 110, Sec. 1, Jianguo N. Road, Taichung City 40201, Taiwan; Department of Nutrition, China Medical University, 91, Hsueh-Shih Road, Taichung 40402, Taiwan. Electronic address: djyang1@gmail.com.

PMID: 27542477
DOI: 10.1016/j.foodchem.2016.06.072

Abstract

Antioxidant components and properties (assayed by scavenging DPPH radicals, TEAC, reducing power, and inhibiting Cu(2+)-induced human LDL oxidation) of leaves and stems from three inbred varieties of Lycium chinense Miller, namely ML01, ML02 and ML02-TY, harvested from January to April were studied. Their flavonoid and phenolic acid compositions were also analyzed by HPLC. For each variety, the leaves and stems collected in higher temperature month had higher contents of total phenol, total flavonoid and condensed tannin. Contents of these components in the samples collected in different months were in the order: April (22.3°C)>March (18.0°C)>January (15.6°C)>February (15.4°C). Antioxidant activities of the leaves and stems for all assays also showed similar trends. The samples from different varieties collected in the same month also possessed different phenolic compositions and contents and antioxidant activities. Their antioxidant activities were significantly correlated with flavonoid and phenolic contents.

Keywords: Antioxidant activity; Harvest time; Lycium chinense Miller; Phenolic composition.

MeSH terms

Antioxidants / analysis*
Chromatography, High Pressure Liquid
Flavonoids / analysis
Lycium / chemistry*
Phenols / analysis*
Plant Extracts / chemistry*
Plant Leaves / chemistry*
Plant Stems / chemistry*

Substances

Antioxidants
Flavonoids
Phenols
Plant Extracts