Effect of low temperature stress on physiological indexes of cold resistance of Stylosanthes guianensis var. intermedia and S. guianensis ‘TPRC2001-1’

• Li Li, 
• Peng-zhi Yang, 
• Shan-wen Ke, 
• Tian-xiu Zhong, 
• Shu Chen, 
• Xin-ming Xie