MIAO Shu-jie,QIAO Yun-fa,LIU Xiao-bing.Phosphorus Affected Organic Acid Exudation from Soybean Root[J].Soybean Science,2011,30(01):127-130.[doi:10.11861/j.issn.1000-9841.2011.01.0127]
磷影响大豆根系分泌有机酸总量和不同根区有机酸量
- Title:
- Phosphorus Affected Organic Acid Exudation from Soybean Root
- 文章编号:
- 1000-9841（2011）01-0127-04
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 采用营养液培养的方法，设置由无磷转化为供磷（0-50）和由供磷转换为无磷（50-0）2个处理，分析了磷转换处理对不同根区有机酸的影响。结果表明：大豆生长对磷素的需求非常迫切，50-0处理根系可溶性磷含量相对较高，而0-50处理地上部可溶性磷含量相对较高；50-0处理根系有机酸分泌量较0-50处理大，而且分泌量随着距离根尖越远越少，50-0处理根区分泌有机酸的变化比0-50处理平缓。
- Abstract:
- To study the effect of phosphorus on organic acid exudation of soybean root, the phosphorus level changed from 0 to 50 μM and 50 to 0 μM in nutrient solution was carried out. The low-molecular-weight organic acids in root exudates of soybean were determined by high performance liquid chromatography under nutrient solution culture. The dynamics of low-molecular-weight organic acids under different root region were investigated. The influence of P-deficiency on soluble phosphorus content was analyzed. The results showed that the soluble phosphorus content of root in 50-0 treatment was relative higher, while that of shoot in 0-50 treatment was relative higher. Otherwise, organic acid exudation from 50-0 treatment soybean root was larger than 0-50 treatment. The amount of organic acid exudation from soybean root was reduced as far away root tip. The trend of decrease in 50-0 treatment was more slowly than 0-50 treatment.
参考文献/References:
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备注/Memo
基金项目：农业部油料作物生物学重点开放实验室开放课题资助项目(201009)；黑龙江省青年科学基金资助项目（QC2009C59）；中国科学院东北地理与农业生态研究所青年博士基金资助项目。