2015年
Exudation of fumarate from roots contributes to high aluminum resistance in melaleuca cajuputi
Plant Root
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- 巻
- 9
- 号
- 開始ページ
- 15
- 終了ページ
- 23
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3117/plantroot.9.15
- 出版者・発行元
- Japanese Society for Root Research
Two Melaleuca species, M. cajuputi and M. bracteata, were compared to identify the factors determining their distinct aluminum (Al) resistance levels. The presence of Al in a liquid culture medium (maximum tested concentration, 2 mM) did not affect the growth of M. cajuputi, but severely inhibited the growth of M. bracteata. The Al content in the roots was 50% higher in Al-sensitive M. bracteata than in Al-resistant M. cajuputi. Al penetration and tissue damage were obvious in the roots of M. bracteata, but only mild in the roots of M. cajuputi. Relatively high levels of fumarate were released by the roots of M. cajuputi, but not by those of M. bracteata. Supplementation of Al-containing liquid media with fumarate resulted in a reduction of Al toxicity on M. bracteata. These results suggest that Al-resistant M. cajuputi releases fumarate from its roots, thereby detoxifying Al.
- ID情報
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- DOI : 10.3117/plantroot.9.15
- ISSN : 1881-6754
- SCOPUS ID : 84934875178