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菌根菌の真菌Glomus versiformeからのリン酸トランスポーターです
1Samuel Roberts Noble Foundation, Plant Biology Division, Ardmore, Oklahoma 73401, USA.
Nature
|December 7, 1995
まとめ
ベジキュラ・アーバスキュラ (VA) 菌根菌は,植物の栄養素の吸収を促進する. 研究者らは,この共生プロセスに不可欠なGlomus versiformeに新しいリン酸媒介体 (GvPT) を特定しました.
科学分野:
- 植物・キノコ共生は,植物とキノコの共生である.
- 分子生物学は分子生物学である.
- 栄養素の輸送について
背景:
- 膀状-状 (VA) 菌根菌は,ほとんどの陸上の植物と重要な共生関係を形成します.
- これらの真菌は,特に栄養を制限する条件下で,成長に不可欠な鉱物栄養素,特にリン酸の吸収を植物に助けます.
- 菌類のリン酸吸収の分子メカニズムの理解は,VA菌類の義務的な共生的な性質のために制限されています.
研究 の 目的:
- VA菌根関連における真菌媒介のリン酸吸収の分子メカニズムを調査する.
- VA菌根菌の真菌Glomus versiforme.からのリン酸トランスポーターを特定し,特徴づけること.
主な方法:
- Glomus versiforme.からトランスメブランフォスファートトランスポーター (GvPT) をコードする補完DNA (cDNA) の識別.
- イーストのリン酸輸送変異体を補充することによって,GvPTの機能確認.
- 菌根結合中のG. versiformeにおけるGvPT発現の局所化.
主要な成果:
- GvPTと名付けられた,トランスメブランリン酸化物トランスポーターをコードする補完DNA (cDNA) が,Glomus versiforme.から確認された.
- GvPTタンパク質は,酵母変異体の補充を通じて,リン酸輸送体として機能することが確認されました.
- GvPTの発現は,土壌のリン酸吸収の主な部位であるG. versiformeの外部ヒファで発見されました.
結論:
- この研究では,VA菌類の真菌菌のGlomus versiforme.で重要な膜経リン酸輸送体 (GvPT) を特定しました.
- GvPTは,菌類が最初に土壌からリン酸塩を吸収する際に重要な役割を果たします.
- この発見は,植物とキノコの共生における有益な栄養交換に関する分子洞察を提供します.
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