Transcription switches for protoxylem and metaxylem vessel formation
Transcription switches for protoxylem and metaxylem vessel formation
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DOI：
10.1101/gad.1331305
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发表时间：
2005-08-15
影响因子：
10.5
通讯作者：
Demura, T
中科院分区：
文献类型：
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作者：
Kubo, M;Udagawa, M;Demura, T
陆地植物进化出木质部导管来输送水分和养分，并为植物提供支持。新建立的拟南芥木质部维管分子形成系统的基因芯片分析和启动子分析表明，一些植物特异的NAC结构域转录因子可能参与了木质部的形成。在拟南芥和杨树中，维管相关的NAC-DOMAIN6(VND6)和VND7可以分别诱导多种细胞转分化为次木质部和原木质部的维管分子。VND6和VND7的显性抑制分别特异性地抑制了根中次生木质部和原生木质部维管的形成。这些发现表明，这些基因是植物次生木质部和原生木质部导管形成的转录开关。
Land plants evolved xylem vessels to conduct water and nutrients, and to support the plant. Microarray analysis with a newly established Arabidopsis in vitro xylem vessel element formation system and promoter analysis revealed the possible involvement of some plant-specific NAC-domain transcription factors in xylem formation. VASCULAR-RELATED NAC-DOMAIN6 (VND6) and VND7 can induce transdifferentiation of various cells into metaxylem- and protoxylem-like vessel elements, respectively, in Arabidopsis and poplar. A dominant repression of VND6 and VND7 specifically inhibits metaxylem and protoxylem vessel formation in roots, respectively. These findings suggest that these genes are transcription switches for plant metaxylem and protoxylem vessel formation.