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首页> 外文期刊>Journal of plant nutrition and soil science >Genotypic differences in shoot silicon concentration and the impact on grain arsenic concentration in rice
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Genotypic differences in shoot silicon concentration and the impact on grain arsenic concentration in rice

机译：芽硅浓度的基因型差异及水稻中谷粒砷浓度的影响

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Silicon in rice (Oryza sativa L.) has been demonstrated to be involved in resistance to lodging, drought, and salinity, and also enhances resistance to pests and diseases. The aim of this study was to determine the range of silicon concentration in a set of rice (Oryza sativa L.) accessions, and to determine if the natural variation of shoot silicon is linked to the previously identified silicon transporters (Lsi genes). Silicon concentration was determined in 50 field-grown accessions, representing all sub-populations of rice, with all accessions being genotyped with 700K SNPs. SNPs within 10 kb of the Lsi genes were examined to determine if any were significantly linked with the phenotypic variation. An XRF method of silicon determination compared favourably with digestion and colorimetric analysis. There were significant genotypic differences in shoot silicon ranging from 16.5 to 42.4 mg g(-1) of plant dry weight, but there was no significant difference between the rice sub-populations. Plants with different alleles for SNPs representing Lsi2 and Lsi3 were significantly different for shoot silicon concentration. Shoot silicon correlated negatively with grain arsenic in the tropical and temperate japonica sub-population, suggesting that accessions with high shoot silicon have reduced grain arsenic. This study indicates that alleles for Lsi genes are excellent candidate genes for further study to explain the natural variation of shoot silicon in rice.
机译：稻米硅（Oryza Sativa L.）已经证明涉及耐植物，干旱和盐度，并增强对害虫和疾病的抗性。该研究的目的是确定一组水稻（Oryza Sativa L.）涂层中的硅浓度范围，并确定拍硅的自然变化是否与先前鉴定的硅运输蛋白（LSI基因）连接。在50个生物中浓度中测定硅浓度，代表米的所有次粒，所有摘录都以700K SNP进行基因分型。检测LSI基因10 kB内的SNP以确定是否有与表型变异显着相关。硅测定的XRF方法有利地与消化和比色分析相比。芽硅的初始基因型差异范围为16.5至42.4mg（-1）植物干重，但水稻群之间没有显着差异。对于代表LSI2和LSI3的SNP的不同等位基因的植物对于拍摄硅浓度显着不同。射击硅与热带和温带杂草中的谷物砷与杏子群呈负相关，表明具有高拍摄硅的含量减少了谷物砷。本研究表明，LSI基因的等位基因是进一步研究的优异候选基因，以解释水稻中射击硅的自然变化。

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