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Molecular cloning and functional analysis of two phosphate transporter genes from Rhizopogon luteolus and Leucocortinarius bulbiger, two ectomycorrhizal fungi of Pinus tabulaeformis

文献类型： 外文期刊

作者： Zheng, Rong 1 ; Wang, Jugang 1 ; Liu, Min 1 ; Duan, Guozhen 1 ; Gao, Xiaomin 3 ; Bai, Shulan 1 ; Han, Yachao 4 ;

作者机构： 1.Inner Mongolia Agr Univ, Coll Forestry, Hohhot 010019, Inner Mongolia, Peoples R China

2.Inner Mongolia Normal Univ, Coll Life Sci & Technol, Hohhot 010020, Inner Mongolia, Peoples R China

3.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Zhanjiang 524091, Guangdong, Peoples R China

4.Fuyang Vocat & Tech Coll, Fuyang 236031, Anhui, Peoples R China

关键词： Phosphate transporter;Ectomycorrhizae;Heterologous characterization;Gene expression;Pinus tabulaeformis

期刊名称：MYCORRHIZA （ 影响因子：3.387； 五年影响因子：4.031 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Inorganic phosphorus (Pi) is essential for plant growth, and phosphate (P) deficiency is a primary limiting factor in Pinus tabulaeformis development in northern China. P acquisition in mycorrhizal plants is highly dependent on the activities of phosphate transporters of their root-associated fungi. In the current study, two phosphate transporter genes, RlPT and LbPT, were isolated from Rhizopogon luteolus and Leucocortinarius bulbiger, respectively, two ectomycorrhizal fungi forming symbiotic interactions with the P. tabulaeformis. Phylogenetic analysis suggested that the sequence of the phosphate transporter of L. bulbiger is most closely related to a phosphate transporter of Hebeloma cylindrosporum, whereas the phosphate transporter of R. luteolus is most closely related to that of Piloderma croceum. The subcellular localization indicated that RlPT and LbPT were expressed in the plasma membrane. The complementation assay in yeast indicated that both RlPT and LbPT partially compensated for the absence of phosphate transporter activity in the MB192 yeast strain, with a K (m) value of 57.90 mu mol/L Pi for RlPT and 35.87 mu mol/L Pi for LbPT. qPCR analysis revealed that RlPT and LbPT were significantly up-regulated at lower P availability, which may enhance P uptake and transport under Pi starvation. Our results suggest that RlPT and LbPT presumably play a key role in Pi acquisition by P. tabulaeformis via ectomycorrhizal fungi.

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