title: Analysis of the contribution of acid phosphatase to P efficiency in Brassica napus under low phosphorus conditions.
abstract: To understand whether genotypic variation in acid phosphatase (APase) activity in rapeseed (Brassica napus L.) induced by phosphorus (P) deficiency has impact on P efficiency, soil APase activity in the rhizosphere for rapeseed P-efficient genotype 102 and P-inefficient genotype 105 was measured against organic and inorganic P sources in the pot experiment, and the activities of root-secreted APase and leaf intracellular APase were investigated in different P-starvation periods in the nutrient solution. Higher activity of root-secreted APase in B. napus was induced under low P conditions. However, P nutrition and P uptake efficiency of the plants supplied with organic P were not directly related to the activity of root-secreted APase due to several confounding factors affecting APase availability. The higher activity of leaf APase improved P remobilization in plants and played important roles in enhancing P use efficiency, shown by the significant correlation between leaf APase activity and P use efficiency in a rapeseed recombinant inbred population of 135 lines.
authors.affiliation: National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
authors.forename: HaiWei
authors.initials: H
authors.lastname: Zhang
authors.forename: Yu
authors.initials: Y
authors.lastname: Huang
authors.forename: XiangSheng
authors.initials: X
authors.lastname: Ye
authors.forename: FangSen
authors.initials: F
authors.lastname: Xu
mesh_terms: D000135:Acid Phosphatase / Q000378:metabolism*; D029688:Brassica napus / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D005838:Genotype; D010758:Phosphorus / Q000378:metabolism*; D018515:Plant Leaves / Q000201:enzymology; D018517:Plant Roots / Q000201:enzymology
chemical_list: D010758:Phosphorus; D000135:Acid Phosphatase