期刊
PLANT BIOTECHNOLOGY
卷 32, 期 2, 页码 119-U14出版社
JAPANESE SOC PLANT CELL & MOLECULAR BIOLOGY
DOI: 10.5511/plantbiotechnology.15.0208a
关键词
Arabidopsis thaliana; NAC domain protein; protein complex; transcription factor; xylem vessel differentiation
资金
- JST, PRESTO
- Ministry of Education, Science, Sports, and Culture of Japan [25840098]
- Grants-in-Aid for Scientific Research [25840098, 24770052, 25114520, 24114001] Funding Source: KAKEN
The Arabidopsis thaliana NAM, ATAF1/2 and CUC2 (NAC) domain transcription factor VND-INTERACTING1 (VNI1) was previously isolated as an interacting factor of VASCULAR-RELATED NAC-DOMAIN PROTEIN7 (VND7), a key regulator of xylem vessel differentiation, in a yeast two-hybrid screening. Here, we characterized VNI1 and its closest homolog, ANAC103, at the molecular level. Both VNI1 and ANAC103 interacted in vitro not only with VND proteins but also with other NAC domain proteins, such as NAC1 and CUC2. A transient expression assay showed that both VNI1 and ANAC103 are transcriptional activators. ANAC103 promoter activity was detected in vascular tissues, as well as in the trichomes, guard cells, and margins of young leaves. These data suggest that VNI1 and ANAC103 promote the differentiation of various types of cells by modulating the transcriptional activities of a wide range of NAC domain transcription factors.
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