文献类型： 外文期刊

作者： Bentsink, L ¹ ; Yuan, K ² ; Koornneef, M ³ ; Vreugdenhil, D ⁴ ;

作者机构： 1.Univ Wageningen & Res Ctr, Grad Sch Expt Plant Sci, NL-6703 BD Wageningen, Netherlands

2.Univ Wageningen & Res Ctr, Genet Lab, NL-6703 BD Wageningen, Netherlands

3.Univ Wageningen & Res Ctr, Dept Plant Sci, Lab Plant Physiol, NL-6703 BD Wageningen, Netherlands

4.Shandong Inst Pomol, Shandong 271000, Peoples R China

关键词： Arabidopsis;QTL analysis;phytate;phosphate;natural variation

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2003 年 106 卷 7 期

页码：

收录情况： SCI

摘要： Phytate (myo-inositol-1,2,3,4,5,6-hexakisphosphate, InsP6) is the most abundant P-containing compound in plants, and an important anti-nutritional factor, due to its ability to complex essential micro-nutrients, e.g. iron and zinc. Analysis of natural variation for InsP6 and Pi accumulation in seeds and leaves for a large number of accessions of Arabidopsis thaliana, using a novel method for InsP6 detection, revealed a wide range of variation in InsP6 and Pi levels, varying from 7.0 mg to 23.1 mg of InsP6 per gram of seed. Quantitative trait locus (QTL) analysis of InsP6 and Pi levels in seeds and leaves, using an existing recombinant inbred line population, was performed in order to identify a gene(s) that is (are) involved in the regulation of InsP6 accumulation. Five genomic regions affecting the quantity of the InsP6 and Pi in seeds and leaves were identified. One of them, located on top of chromosome 3, affects all four traits. This QTL appears as the major locus responsible for the observed variation in InsP6 and Pi contents in the Ler/Cvi RIL population; the Ler allele decreases the content of both InsP6 and Pi in seeds and in leaves. The InsP6/Pi locus was further fine-mapped to a 99-kb region, containing 13 open reading frames. The maternal inheritance of the QTL and the positive correlation between InsP6 and total Pi levels both in seeds and in leaves indicate that the difference in InsP6 level between Ler and Cvi is likely to be caused by a difference in transport rather than by an alteration in the biosynthesis. Therefore, we consider the vacuolar membrane ATPase subunit G, located in the region of interest, as the most likely candidate gene for InsP6/Pi.