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| 著者 | Kobayashi T., Itai R.N., Senoura T., Oikawa T., Ishimaru Y., Ueda M., Nakanishi H., Nishizawa N.K. | |
| タイトル | Jasmonate signaling is activated in the very early stages of iron deficiency responses in rice roots. | |
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Abstract: Under low iron availability, plants induce the expression of various genes involved in iron uptake and translocation at the transcriptional level. This iron deficiency response is affected by various plant hormones, but the roles of jasmonates in this response are not well-known. We investigated the involvement of jasmonates in rice iron deficiency responses. High rates of jasmonate-inducible genes were induced during the very early stages of iron deficiency treatment in rice roots. Many jasmonate-inducible genes were also negatively regulated by the ubiquitin ligases OsHRZ1 and OsHRZ2 and positively regulated by the transcription factor IDEF1. Ten out of 35 genes involved in jasmonate biosynthesis and signaling were rapidly induced at 3 h of iron deficiency treatment, and this induction preceded that of known iron deficiency-inducible genes involved in iron uptake and translocation. Twelve genes involved in jasmonate biosynthesis and signaling were also upregulated in HRZ-knockdown roots. Endogenous concentrations of jasmonic acid and jasmonoyl isoleucine tended to be rapidly increased in roots in response to iron deficiency treatment, whereas these concentrations were higher in HRZ-knockdown roots under iron-sufficient conditions. Analysis of the jasmonate-deficient cpm2 mutant revealed that jasmonates repress the expression of many iron deficiency-inducible genes involved in iron uptake and translocation under iron sufficiency, but this repression is partly canceled under an early stage of iron deficiency. These results indicate that jasmonate signaling is activated during the very early stages of iron deficiency, which is partly regulated by IDEF1 and OsHRZs. |
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| 掲載誌 | Plant Mol. Biol. | |
| Country | unknown | |
| 刊数 | 91(4-5) | |
| ページ | 533-47 | |
| 発刊年 | 2016 | |
| PubMed ID | 27143046 | |
| PubMed Central ID | 4914535 | |
| DOI | 10.1007/s11103-016-0486-3 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | ABI3 AOC AOS1 AOS2 DMAS1 HRZ1 HRZ2 IRO2 LOX8 NAS1 NAS2 RBBI3-1 RBBI3-3 RMC SAMS1 SIP2 TOM1 YSL2 _ _ _ _ | |
| INSD | - | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
- | |
| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
