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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.2
- 수록면
- 111 - 118 (8page)
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MiR399f plays a crucial role in maintaining phosphate homeostasis in Arabidopsis thaliana. Under phosphate starvation conditions, AtMYB2, which plays a role in plant salt and drought stress responses, directly regulates the expression of miR399f. In this study, we found that miR399f also participates in plant responses to abscisic acid (ABA), and to abiotic stresses including salt and drought. Salt and ABA treatment induced the expression of miR399f, as confirmed by histochemical analysis of promoter-GUS fusions. Transgenic Arabidopsis plants overexpressing miR399f (miR399f-OE) exhibited enhanced tolerance to salt stress and exogenous ABA, but hypersensitivity to drought. Our in silico analysis identified ABF3 and CSP41b as putative target genes of miR399f, and expression analysis revealed that mRNA levels of ABF3 and CSP41b decreased remarkably in miR399f-OE plants under salt stress and in response to treatment with ABA. Moreover, we showed that activation of stress-responsive gene expression in response to salt stress and ABA treatment was impaired in miR399f-OE plants. Thus, these results suggested that in addition to phosphate starvation signaling, miR399f might also modulates plant responses to salt, ABA, and drought, by regulating the expression of newly discovered target genes such as ABF3 and CSP41b.
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참고문헌 (50)
참고문헌 신청
Abe, H. / 2003 / Arabidopsis AtMYC2(bHLH)and AtMYB2(MYB)function as transcriptional activators in abscisic acid signaling / Plant Cell 15:63~78
Aung, K. / 2006 / pho2, a phosphate overaccumulator, is caused by a nonsense mutation in a microRNA399 target gene / Plant Physiol 141:1000~1011
Baek, D. / 2013 / Regulation of miR399f transcription by AtMYB2 affects phosphate starvation responses in Arabidopsis / Plant Physiol 161:362~373
Bari, R. / 2006 / PHO2, microRNA399, and PHR1 define a phosphate-signaling pathway in plants / Plant Physiol 141:988~999
Bartel, D. P. / 2004 / MicroRNAs : genomics, biogenesis, mechanism, and function / Cell 116:281~297
Aung, K. / 2006 / pho2, a phosphate overaccumulator, is caused by a nonsense mutation in a microRNA399 target gene / Plant Physiol 141:1000~1011
Baek, D. / 2013 / Regulation of miR399f transcription by AtMYB2 affects phosphate starvation responses in Arabidopsis / Plant Physiol 161:362~373
Bari, R. / 2006 / PHO2, microRNA399, and PHR1 define a phosphate-signaling pathway in plants / Plant Physiol 141:988~999
Bartel, D. P. / 2004 / MicroRNAs : genomics, biogenesis, mechanism, and function / Cell 116:281~297
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