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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 17 - 23 (7page)
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Mitogen-activated protein kinase (MAPK) signaling cascades play critical roles in various cellular events in plants, including stress responses, innate immunity, hormone signaling, and cell specificity. MAPK-mediated stress signaling is also known to negatively regulate nitrogen-fixing symbiotic interactions, but the molecular mechanism of the MAPK signaling cas-cades underlying the symbiotic nodule development remains largely unknown. We show that the MtMKK5-MtMPK3/6 signaling module negatively regulates the early symbiotic nodule formation, probably upstream of ERN1 (ERF Required for Nodulation 1) and NSP1 (Nod factor Signaling Pathway 1) in Medicago truncatula. The overexpression of MtMKK5 stimulated stress and defense signaling pathways but also reduced nodule formation in M. truncatula roots. Conversely, a MAPK specific inhibitor, U0126, enhanced nodule formation and the expression of an early nodulation marker gene, MtNIN. We found that MtMKK5 directly activates MtMPK3/6 by phosphorylating the TEY motif within the activation loop and that the MtMPK3/6 proteins physically interact with the early nodulation-related transcription factors ERN1 and NSP1. These data suggest that the stress signaling-mediated MtMKK5/MtMPK3/6 module sup-presses symbiotic nodule development via the action of early nodulation transcription factors.
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참고문헌 (30)
참고문헌 신청
Ane, J. M. / 2004 / Medicago truncatula DMI1 required for bacterial and fungal symbioses in legumes / Science 303:1364~1367
Capoen, W. / 2008 / How CYCLOPS keeps an eye on plant symbiosis / Proc. Natl. Acad. Sci. USA 105:20053~20054
Chen, T. / 2012 / A MAP kinase kinase interacts with SymRK and regulates nodule organogenesis in Lotus japonicus / Plant Cell 24:823~838
Crespi, M. / 2008 / De novo organ formation from differentiated cells: root nodule organogenesis / Sci. Signal 1:re11
Ding, Y. / 2008 / Abscisic acid coordinates Nod factor and cytokinin signaling during the regulation of nodulation in Medicago truncatula / Plant Cell 20:2681~2695
Capoen, W. / 2008 / How CYCLOPS keeps an eye on plant symbiosis / Proc. Natl. Acad. Sci. USA 105:20053~20054
Chen, T. / 2012 / A MAP kinase kinase interacts with SymRK and regulates nodule organogenesis in Lotus japonicus / Plant Cell 24:823~838
Crespi, M. / 2008 / De novo organ formation from differentiated cells: root nodule organogenesis / Sci. Signal 1:re11
Ding, Y. / 2008 / Abscisic acid coordinates Nod factor and cytokinin signaling during the regulation of nodulation in Medicago truncatula / Plant Cell 20:2681~2695
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