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Seasonal, spatial, and interspecific variation in quercetin in Apocynum venetum and Poacynum hendersonii, Chinese traditional herbal teas.
J Agric Food Chem. 2003 Apr 09; 51(8):2390-3.JA

Abstract

Quercetin is of particular importance as it has been found to have functions of suppressing tumors, reducing blood pressure, and scavenging free radicals. It is one of the major flavonoids in Apocynum venetum and Poacynum hendersonii, whose leaves have long been used as traditional herbal teas in China and Japan. Both species are also cultivated as fiber plants because of their outstanding quality of phloem fiber in stems. To obtain high output of both quercetin and fiber, it is necessary to optimize harvesting time for their leaves. Thus, understanding the developmental patterns of quercetin in leaves and fiber in stems is crucial to achieving this goal. In the present study, temporal and interspecific variations in quercetin in the leaves between A. venetum and P. hendersonii and spatial variation among P. hendersonii populations were studied by HPLC during the period from April to October in 1999. The results show that the content of quercetin in both species reached its highest level in summer and its lowest in autumn. The quercetin content in the leaves of P. hendersonii was generally higher than that of A. venetum no matter when their leaves were harvested. There was significant difference in quercetin content among three geographical populations of P. hendersonii, which might be the result of climatic difference-cooler climate might favor accumulation of quercetin in the leaves of P. hendersonii. Furthermore, the developmental patterns of total phenolics in the leaves of the two species were the same as that of the quercetin, that is, summer is an optimal harvesting season for both quercetin and other phenolics. The results obtained here suggest that P. herdersonii is a better material for herbal tea or pharmaceutical purposes, and that the best harvest time of its leaves should be summer.

Authors+Show Affiliations

Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Institute of Biodiversity Science, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

12670186

Citation

Ma, Miao, et al. "Seasonal, Spatial, and Interspecific Variation in Quercetin in Apocynum Venetum and Poacynum Hendersonii, Chinese Traditional Herbal Teas." Journal of Agricultural and Food Chemistry, vol. 51, no. 8, 2003, pp. 2390-3.
Ma M, Hong CL, An SQ, et al. Seasonal, spatial, and interspecific variation in quercetin in Apocynum venetum and Poacynum hendersonii, Chinese traditional herbal teas. J Agric Food Chem. 2003;51(8):2390-3.
Ma, M., Hong, C. L., An, S. Q., & Li, B. (2003). Seasonal, spatial, and interspecific variation in quercetin in Apocynum venetum and Poacynum hendersonii, Chinese traditional herbal teas. Journal of Agricultural and Food Chemistry, 51(8), 2390-3.
Ma M, et al. Seasonal, Spatial, and Interspecific Variation in Quercetin in Apocynum Venetum and Poacynum Hendersonii, Chinese Traditional Herbal Teas. J Agric Food Chem. 2003 Apr 9;51(8):2390-3. PubMed PMID: 12670186.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Seasonal, spatial, and interspecific variation in quercetin in Apocynum venetum and Poacynum hendersonii, Chinese traditional herbal teas. AU - Ma,Miao, AU - Hong,Cheng-Lin, AU - An,Shu-Qing, AU - Li,Bo, PY - 2003/4/3/pubmed PY - 2003/5/3/medline PY - 2003/4/3/entrez SP - 2390 EP - 3 JF - Journal of agricultural and food chemistry JO - J Agric Food Chem VL - 51 IS - 8 N2 - Quercetin is of particular importance as it has been found to have functions of suppressing tumors, reducing blood pressure, and scavenging free radicals. It is one of the major flavonoids in Apocynum venetum and Poacynum hendersonii, whose leaves have long been used as traditional herbal teas in China and Japan. Both species are also cultivated as fiber plants because of their outstanding quality of phloem fiber in stems. To obtain high output of both quercetin and fiber, it is necessary to optimize harvesting time for their leaves. Thus, understanding the developmental patterns of quercetin in leaves and fiber in stems is crucial to achieving this goal. In the present study, temporal and interspecific variations in quercetin in the leaves between A. venetum and P. hendersonii and spatial variation among P. hendersonii populations were studied by HPLC during the period from April to October in 1999. The results show that the content of quercetin in both species reached its highest level in summer and its lowest in autumn. The quercetin content in the leaves of P. hendersonii was generally higher than that of A. venetum no matter when their leaves were harvested. There was significant difference in quercetin content among three geographical populations of P. hendersonii, which might be the result of climatic difference-cooler climate might favor accumulation of quercetin in the leaves of P. hendersonii. Furthermore, the developmental patterns of total phenolics in the leaves of the two species were the same as that of the quercetin, that is, summer is an optimal harvesting season for both quercetin and other phenolics. The results obtained here suggest that P. herdersonii is a better material for herbal tea or pharmaceutical purposes, and that the best harvest time of its leaves should be summer. SN - 0021-8561 UR - https://www.unboundmedicine.com/medline/citation/12670186/Seasonal_spatial_and_interspecific_variation_in_quercetin_in_Apocynum_venetum_and_Poacynum_hendersonii_Chinese_traditional_herbal_teas_ L2 - https://doi.org/10.1021/jf021055i DB - PRIME DP - Unbound Medicine ER -