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Magnesium deficiency damages the youngest mature leaf in rice through tissue-specific iron toxicity
https://repo.qst.go.jp/records/49135
https://repo.qst.go.jp/records/49135c33f2b2f-41f1-44eb-b9f3-8dc53389a1a2
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-06-27 | |||||
| タイトル | ||||||
| タイトル | Magnesium deficiency damages the youngest mature leaf in rice through tissue-specific iron toxicity | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
I. Kobayashi, Natsuko
× I. Kobayashi, Natsuko× Ogura, Takaaki× Takagi, Keiko× Sugita, Ryohei× Suzuki, Hisashi× Iwata, Ren× M. Nakanishi, Tomoko× Tanoi, Keitaro× Hisashi, Suzuki× Ren, Iwata |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Aims Magnesium deficiency can cause starch accumulation, photosynthesis inhibition and senescence particularly in young mature leaves. This study was performed to identify the initial process leading to leaf senescence under Mg deficiency. Methods Gene expression in the young leaf was analyzed at days 2, 4, 5 of Mg deficiency using microarray analysis, and several Fe responsive genes were identified. Therefore, the effect of lowering Fe supply on gene expression and oxidative stress under Mg deficiency was evaluated. Results Transcriptome analysis revealed that 7 of the 30 most upregulated genes and 11 of the 30 most downregulated genes were Fe-responsive. Particularly, the upregulation of OsFER2 and downregulation of OsMIR and OsIRO2 hinted at the induction of excess Fe stress under Mg deficiency. Both lowering of Fe concentration in Mg-free solutions and resupply of Mg without modifying Fe concentrations at day 4 rescued leaves from senescence by inhibiting oxidative stress and normalising the expression of Fe-responsive genes. Meanwhile, Fe content was equal between control, Mg-deficient and Mg-resupplied plants. Conclusion Mg shortage can induce excess Fe stress, which in turn causes oxidative stress before inhibition of photosynthesis. It is proposed that Mg deficiency disrupts a mechanism for storing toxic Fe ions into the vacuole in the expanding young leaf cells. |
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| 書誌情報 |
Plant and Soil 巻 428, p. 137-152, 発行日 2018-04 |
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| 出版者 | ||||||
| 出版者 | Springer | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0032-079X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1007/s11104-018-3658-x | |||||
