Faculty Profiles - YAMAJI Naoki

MISC - YAMAJI Naoki

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Silicon efflux transporters isolated from two pumpkin cultivars contrasting in Si uptake

MINTANI-UENO N.

Plant Signal. Behav. 6 ( 7 ) 991 - 994 2011

11-30 Identification of the transporter involved in Mn tolerance in rice

Abstracts of the Annual Meetings, Japanese Society of Soil Science and Plant Nutrition 57 ( 0 ) 88 - 88 2011

Isolation and characterization of an Al-induced transporter gene in buckwheat

Yokosho Kengo, Yamaji Naoki, Ma Jian Feng

Plant and Cell Physiology Supplement 2011 ( 0 ) 960 - 960 2011

Publisher：The Japanese Society of Plant Physiologists

Buckwheat is not only highly tolerant to Al, but also accumulates Al at high concentration in the shoots. Physiological studies have shown that buckwheat secretes oxalate in response to Al and sequesters Al into the vacuoles in the leaves. Many transporters are proposed to be involved in these processes, but none of them has been identified so far. To identify these transporters, we established an EST library of buckwheat roots. Sequence analysis with next generation sequencer and short-gun analysis generated 100,000 reading contigs and as well as the gene expression level. In the present study, we focus on FeIREG2, which showed higher expression in transporter candidate genes. The full length of this gene shows 60% similarity with Arabidopsis IREG2, which is a tonoplast-localized efflux transporter of Fe, Co and Ni. FeIREG2 was expressed in the buckwheat roots and the expression was greatly induced by Al. Transient assay using FeIREG2-GFP fusion showed that this protein is localized to the tonoplast. Based on these evidences, we propose that FeIREG2 might be involved in the sequestration of Al into vacuoles in buckwheat. Further characterization of this gene is being undertaken.

DOI： 10.14841/jspp.2011.0.0960.0

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11-27 ソバのアルミニウム誘導性トランスポーターの単離と機能解析(11.植物の有害元素)

横正健剛, 山地直樹, 馬建鋒

日本土壌肥料学会講演要旨集 57 ( 0 ) 87 - 87 2011

イネアルミニウム応答性転写調節因子ART1のシス配列の同定

筒井友和, 山地直樹, 馬建鋒

日本植物生理学会年会要旨集 52nd 2011

イネのカドミウム集積を抑制する遺伝子

馬建鋒, 上野大勢, 山地直樹, 矢野昌裕

日本植物生理学会年会要旨集 52nd 2011

イネの節で高発現するOsNramp3の機能解析

山地直樹, 夏継星, 佐々木明正, 馬建鋒

日本植物生理学会年会要旨集 52nd 2011

Research on transporters and its impact on the fields of soil science, fertilizers and plant nutrition. : 3. Transporters involved in Al tolerance in plants

MA Jian Feng, YAMAJI Naoki

Journal of the science of soil and manure, Japan 81 ( 5 ) 518 - 522 2010.10

11-16 オオムギアルミニウム活性型クエン酸トランスポーター遺伝子HvAACT1の発現調節機構(11.植物の有害元素,2010年度北海道大会)

藤井美帆, 山地直樹, 中園幹生, 佐藤和広, 馬建鋒

日本土壌肥料学会講演要旨集 ( 56 ) 80 - 80 2010.9

11-4 イネ玄米のカドミウム集積を制御するトランスポーターの同定(11.植物の有害元素,2010年度北海道大会)

上野大勢, 山地直樹, 河野いづみ, 黄朝鋒, 安藤露, 矢野昌裕, 馬建鋒

日本土壌肥料学会講演要旨集 ( 56 ) 76 - 76 2010.9

11-24 イネOsYSL6はマンガン過剰耐性に関与する(11.植物の有害元素,2010年度北海道大会)

佐々木明正, 山地直樹, 馬建鋒

日本土壌肥料学会講演要旨集 ( 56 ) 82 - 82 2010.9

11-14 イネアルミニウム耐性遺伝子OsALS1の機能解析(11.植物の有害元素,2010年度北海道大会)

黄朝鋒, 山地直樹, 馬建鋒

日本土壌肥料学会講演要旨集 ( 56 ) 79 - 79 2010.9

Transporters involved in transport and detoxification of minerals in plants

Ma Jian Feng, Yamaji Naoki

Regulation of Plant Growth & Development 45 ( 1 ) 49 - 57 2010.5

Language：Japanese Publisher：The Japanese Society for Chemical Regulation of Plants

Plants are characterized by mineral nutrition, which require 17 essential elements for their growth. Among them, 14 are minerals. These minerals are taken up by the roots, translocated from the roots to the shoots and finally distributed to different cells for functions. A large number of transporters is required for these transport processes. On the other hand, plants are exposed to toxic minerals, therefore detoxification of these minerals by plants at different cellular levels is also required for survival. Herein, we reviewed recent progresses in identification of transporters involved in uptake, translocation, and distribution of essential minerals and of transporters involved in the detoxification of toxic minerals, focusing on iron (Fe), silicon (Si) and aluminum (Al), which represent essential, beneficial and toxic minerals, respectively.

DOI： 10.18978/jscrp.45.1_49

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9-4 イネケイ酸輸送体Lsi3の解析(9.植物の多量栄養素,2010年度北海道大会)

山地直樹, 三谷奈見季, 馬建鋒

日本土壌肥料学会講演要旨集 56 ( 0 ) 55 - 55 2010

9-3 イネケイ酸輸送体遺伝子Lsi1を過剰発現したシロイヌナズナの解析(9.植物の多量栄養素,2010年度北海道大会)

三谷奈見季, 山地直樹, 馬建鋒

日本土壌肥料学会講演要旨集 56 ( 0 ) 54 - 54 2010

Isolation and characterization of two MATE genes in rye

Yokosho Kengo, Yamaji Naoki, Ma Jian Feng

Plant and Cell Physiology Supplement 2010 ( 0 ) 679 - 679 2010

Publisher：The Japanese Society of Plant Physiologists

Multidrug and toxic compound extrusion (MATE) proteins are widely present in bacteria, fungi, plants and mammals. Recent studies have showed that a group of plant MATE genes encodes citrate transporter, which are involved in the Al detoxification or Fe translocation from the roots to the shoots. In this study we isolated two homologous genes (ScFRDL1 and ScFRDL2) of this-type MATE in rye. ScFRDL1 shared 94 % identity with barley Al-induced citrate transporter HvAACT1 and ScFRDL2 shared 80 % identity with rice Al-induced gene OsFRDL2. Both genes were expressed in the roots, however, they showed different expression pattern. The expression of ScFRDL1 was unaffected by Al treatment, but induced by Fe-deficiency. By contrast, the expression of ScFRDL2 was induced by Al but not by Fe deficiency. Furthermore, the expression pattern of OsFRDL2 was consistent with citrate secretion pattern. Immunostaining showed that ScFRDL1 is localized at central cylinder in the basal roots. Taken together, our results suggest that ScFRDL1 is involved in efflux of citrate into the xylem for Fe translocation from root to shoot, while ScFRDL2 is involved in Al-activated citrate secretion in rye.

DOI： 10.14841/jspp.2010.0.0679.0

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11-17 オオムギHvAACT1の5-UTRの挿入配列の解析 : イネによる検証(11.植物の有害元素,2010年度北海道大会)

横正健剛, 藤井美帆, 山地直樹, 馬建鋒

日本土壌肥料学会講演要旨集 56 ( 0 ) 80 - 80 2010

イネの新規ケイ酸輸送体Lsi3の解析

山地直樹, 三谷奈見季, 馬建鋒

日本植物生理学会年会要旨集 51st 2010

オオムギのケイ素分配に関与するトランスポーターの解析

馬建鋒, 山地直樹, 千葉由佳子, 三谷奈見季

日本植物生理学会年会要旨集 51st 2010

イネアルミニウムトランスポーターの同定

夏継星, 山地直樹, 馬建鋒

日本植物生理学会年会要旨集 51st 2010

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