1College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China,
2Qinling National Forest Ecosystem Research Station, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China,
3Department of Biological and Medical Engineering, Shangluo University, Shangluo, Shaanxi 726000, P. R. China,
4College of Life Science, Northwest University, Xi’an, Shaanxi 710069, P. R. China
1College of Forestry, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China,
2Qinling National Forest Ecosystem Research Station, Northwest A&F University, Yangling, Shaanxi 712100, P. R. China,
3Department of Biological and Medical Engineering, Shangluo University, Shangluo, Shaanxi 726000, P. R. China,
4College of Life Science, Northwest University, Xi’an, Shaanxi 710069, P. R. China
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Corresponding author:
Shuoxin Zhang , Tel: +86-29-87082993,
Received: 19 December 2014 • Revised: 12 April 2015 • Accepted: 23 April 2015