Secretion of Citrate from Roots in Response to Al and Low-P in Stylosanthes
Stylo (Stylosanthes) root response to Al and low P was investigated in the present study. Citrate was secreted after the exposure of roots to Al for about 4 h, while citrate was secreted from 6 d after free-P treatment. The amount of citrate secreted during the Al exposure from P-deficiency roots was greater than from P-sufficiency roots. Moreover, more citrate was secreted from Al-resistant cultivars than from Al-sensitive ones. Al-induced secretion was inhibited by niflumic acid, phenylisothiocyanate, and sodium azide, resulting in more Al accumulation in the root apices. These results indicate that adaptation of roots in stylo to both Al and low-P stress may be achieved via citrate secretion.
Fanghua Zuo Guizhi Ling Xiaofeng Li Yongxiong Yu Xinglian Tang
College of Agriculture, Cuangxi University, Nanning 530005, China College of Animal Science and Technology, Southwest University, Beibei, Chongqing 400716, China
国际会议
The 7th International Symposium on Plant-Soil Interactions at Low pH(第七届低pH条件下植物-土壤交互作用国际研讨会)
广州
英文
110-111
2009-05-17（万方平台首次上网日期，不代表论文的发表时间）