磷胁迫下大豆酸性磷酸酶活性变化及磷效率基因型差异分析

Variation of Acid Phosphatase Activity and Analysis of Genotypic Difference in P efficiency of Soybean under Phosphorus Stress

在3种磷水平处理后,对23个大豆品种的叶片和根尖酸性磷酸酶活性、根冠比、干物质量、全磷含量及磷效率进行测定、比较和分析。结果表明,叶片或根尖酸性磷酸酶活性、叶片或根尖酸性磷酸酶活性相对值、根冠比,磷效率、磷效率相对值之间具有极显著差异(P<P0.01);且根尖的酸性磷酸酶活性与相应的磷效率存在显著正相关(r=0.4535),可作为筛选磷高效品种的参考指标;根尖的酸性磷酸酶活性相对值与相应的磷效率相对值存在显著正相关(r=0.5070),可作为耐低磷敏感程度的重要依据。

Under three levels P stress treatment,shoot and root acid phosphatase activities,crown-root ratio,amount of dry matter,phosphate content,and P efficiency of 23 soybean cultivars were studied by determination,comparison and analysis.The result showed that there was significant variance among shoot or root acid phosphatase activities,relative value of shoot and root acid phosphatase activities,crown-root ratio,P efficiency,and relative value of P efficiency（P〈P0.01）;and root acid phosphatase activities were significantly correlated with root acid phosphatase activities and P efficiency（r=0.4535）,which is able to act as an important indicator to screen P highly-efficient cultivars.There existed a significant correlation（r=0.5070） between relative value of root acid phosphatase activity and P efficiency,which can be used as the important indicator for understanding tolerance to low P condition.