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Pak. J. Bot., 47(6): 2195-2205, 2015. |
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Updated: 02-01-16 | ||||
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INFLUENCE OF ENVIRONMENTAL FACTORS ON THE CONTENTS OF ACTIVE INGREDIENTS AND RADICAL SCAVENGING PROPERTY OF POTENTILLA FRUTICOSA IN THE MAIN PRODUCTION AREAS OF CHINA
WEI LIU, DONG-XUE YIN, DONG-MEI WANG & DENG-WU LI*
College of Forestry, Northwest A & F University, Yangling 712100, China *Corresponding author e-mail: dengwuli@163.com
Abstract: Extracts from Potentilla fruticosa have been applied in traditional medicine and exhibited antioxidant property, but little has been known about the diversity of phytochemicals and properties on this species from different growing environment. This study investigated the influence of environmental factors on the active ingredient contents and radical scavenging property of P. fruticosa from different production areas of China in order to discover a location could produce high-quality resources for pharmaceutical products. The contents of tannin, total flavonoids, and rutin were determined and varied within the range of 7.64±0.43~10.68±0.67%, 2.29±0.34~5.37±0.36%, and 0.19±0.053~0.79±0.125%, respectively. Radical scavenging property was quantified, with the IC50 of 7.24±0.423 to 17.23±0.551 μg mL-1. Principal component analysis, multiple linear stepwise regression analysis, and path analysis were conducted to further analysis the relationship between the variations of active ingredients and radical scavenging capacity and growth environment. The results showed dominant environmental factors for these variations were rapidly available nitrogen, rapidly available phosphorus, pH, July average temperature, and annual sunshine duration. Furthermore, a significant positive correlation was observed between pH, annual sunshine duration and active ingredients and radical scavenging property (p<0.05). Considering the high active ingredient contents and strong radical scavenging property, leaf extracts from P. fruticosa could become useful supplements for pharmaceutical products as a new antioxidant agent, and Huzhu Northern Mountain in Qinghai Province and E-mei Mountain in Sichuan Province were selected as favorable production locations.
Key words: Potentilla fruticosa, Environmental factors, Active ingredients, Radical scavenging property, Influence.
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