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Phosphorus Affected Organic Acid Exudation from Soybean Root(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2011年01期
Page:
127-130
Research Field:
Publishing date:

Info

Title:
Phosphorus Affected Organic Acid Exudation from Soybean Root
Author(s):
MIAO Shu-jie1; 2;  QIAO Yun-fa2;  LIU Xiao-bing2
1. Key Laboratory for Oil Crops Genetic Improvement, The Ministry of Agriculture, Wuhan 430062, Hubei;
2. Northeast Institute of Geography and Agricultural Ecology, Chinese Academy of Sciences, Harbin 150081, Heilongjiang, China
Keywords:
Low molecular weight organic acid;  Phosphorus transform;  Soluble phosphorus;  Soybean
PACS:
S565.1
DOI:
10.11861/j.issn.1000-9841.2011.01.0127
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.

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Last Update: 2014-09-11