超ニッケル集積植物"タカネグンバイ Thlaspi japonicum"の化学組成とニッケル化合物の結晶
スポンサーリンク
概要
- 論文の詳細を見る
"Thlaspi japonicum" is the first Ni-hyperaccumulator found in Japan, and its concentrations of each element change widely corresponding to its soil condition. Especially, the plant grown at ultramafic soil area showed characteristic element contents, such as high Ni (1,553 mg (kg dry wt.)^<-1>) and extremely low Ca (2,000 mg (kg dry wt.)^<-1>). The comparative analysis of T.japonicum grown in andesitic and ultramafic rock area was performed, and Ni accumulation form in this plant was also investigated by dimethylglyoxim staining. The results obtained are summarized below. 1) Ca content of T. japonicum grown in the ultramafic soil area was about a fifth of that grown in the andesitic rock area. This plant contained high Zn and Cu ; especially, the Zn content of T. japonicum grown in andesitic rock was 10 times greater than that of the common plants. 2) The Ni compound in T. japonicum was observed as rod-shaped crystal, mainly in the epidermis of the leaves and inside the stem vessels. Many rod-form crystals gathering in fan-shapes were observed around the stomata. 3) Ni compound crystals were also observed in the plant dried at room temperature, but were destructed by heating at 70-80℃. It was considered that the latter transformation was caused by the dehydration of crystal water. 4) No crystal of Ni compound was observed in the T. japonicum grown in andesitic rock area, which contained high Ca of 10,000 mg (kg dry wt.)^<-1>. 5) The nickel content of this plant was lowered to 255 mg (kg dry wt.)^<-1> with an increasing of calcium content to 10,000 mg (kg dry wt.)^<-1> after transplanting from ultramafic soil to a mixed soil of ultramafic and calcium-rich andesitic rock. Ni compound crystals in the leaves were also observed, but they decreased dramatically. 6) Some high nickel accumulating plants (100-400 mg (kg dry wt.)^<-1>) were investigated about the existence of Ni compound crystals, but no sample containing the same crystal was gained. 7) In conclusion, the main purpose of this crystallization is thought to be Ni detoxycation ; however, it was also suggested that T. japonicum may use Ni as the proxy for Ca to remove the harmful metabolites in the low-Ca ultramafic soil.
- 社団法人日本土壌肥料学会の論文
- 2001-08-05
著者
-
水野 隆文
三重大院生資
-
水野 直治
酪農学園大学ハイテクリサーチセンター
-
水野 直治
酪農学園大
-
Mizuno Naoharu
Rakuno Gakuen University
-
堀江 健二
北海道立旭川西高等学校
-
堀江 健二
旭川西高
-
水野 隆文
三重大学生物資源学部
-
野坂 志朗
酪農学園大学
関連論文
- マンガン欠乏ウズラにおける網膜機能障害:LED内蔵型コンタクトレンズ電極を用いた鳥類網膜電図の記録(毒性学)
- 25 水田におけるメタン発酵消化液の利用に関する検討(中部支部講演会,2007年度各支部会)
- 高濃度の鉄および銅含有試料における8-キノリノールを用いた微量アルミニウムの定量法の改良
- P22-7 複合重金属汚染条件における緑化用ソバの鉛集積能力の検討(ポスター紹介,22.環境保全,2009年度京都大会)
- P9-28 タカネグンバイ由来NRAMPトランスポーターの発現がシロイヌナズナのニッケル耐性に及ぼす影響(ポスター紹介,9.植物の無機栄養,2008年度愛知大会)
- 9-40 Ni超集積性植物タカネグンバイ由来ZIPトランスポーター(TjZNT1/2)の基質選択におけるN末端領域の関与(9.植物の無機栄養,2008年度愛知大会)
- 16 メタン発酵消化液を施した水田における窒素量の変化(予報)(中部支部講演会,2006年度各支部会)
- P9-42 キメラTjZnt1-TjZnt2発現酵母を用いたZn^トランスポーターTjZNT1の亜鉛認識部位の同定(9.植物の無機栄養,2007年度東京大会)
- 9-31 鉛集積性ソバ根圏におけるpH低下が鉛可溶化へ及ぼす影響(9.植物の無機栄養,2007年度東京大会)
- 9-21 Thlaspi japonicum由来TjZnt1および2の発現がシロイヌナズナのニッケル耐性に及ぼす影響(9.植物の無機栄養,2007年度東京大会)