分析不同磷处理下的大豆幼叶、根尖酸性磷酸酶活性与植株磷利用率间的相关性,提供能够快速准确筛选磷高效利用大豆基因型的生化指标;在3种不同磷处理水平下,测定并比较12个大豆品种的幼叶、根尖酸性磷酸酶活性以及植株磷利用率;检测2μmol/L磷处理下的159份大豆品种的根尖酸性磷酸酶活性。2μmol/L磷处理下,根尖酸性磷酸酶活性与磷利用率间存在极显著正相关(r>r0.05),并从供试171份材料中筛选出6个磷高效大豆基因型;低磷条件下,大豆根尖酸性磷酸酶活性可作为磷高效基因型筛选的重要生化指标。
Study the relationships between the shoot or root acid phosphatase activity ( APA) and phosphorus utilization ratio under different phosphorus treatments， to provide a basis for screening P efficiency varieties in soybean．Under three different P supply levels， the soybean shoot and root acid phosphatase activities and P utilization ratio of 12 genotypes were determinated and contrasted． The root acid phosphatase activities of 159 genotypes were also detected under 2 μmol /L P concentration． The results showed that soybean root acid phosphatase activity was positively correlated with P utilization ratio significantly ( r ＞ r0． 01) under 2 μmol /L P concentration． Six phosphorus efficiency varieties were screened out from 171 experimental genotypes． Under low phosphorus concentration， soybean root acid phosphatase activity coule be used as an important biochemistry index to screen P efficient genotype．
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