检索结果-南通市图书馆

PtrHB7, a class III HD-Zip Gene, Plays a Critical Role in Regulation of Vascular Cambium Differentiation in Populus

Molecular Plant 2013年第4期6卷 1331-1343页

作者： yingying zhu dongliang song jiayan sun xingfen wang laigeng li National Key Laboratory of Plant Molecular Genetics and Key Laboratory of Synthetic Biology Institute of Plant Physiology and Ecology ShanghaiInstitutes for Biological Sciences Chinese Academy of Sciences 300 Fenglin Rd Shanghai 200032 China

A key question in the secondary growth of trees is how differentiation of the vascular cambium cells is directed to concurrently form two different tissues： xylem or phloem, class III homeodomain-leucine zipper （HD-Zip III） genes are known to play critical roles in the initiation, patterning, and differentiation of the vascular system in the process of primary and secondary growth. However, the mechanism of how these genes control secondary vascular dif- ferentiation is unknown. Here, we show that a Populus class III HD-Zip gene, PtrHB7, was preferentially expressed in cambial zone. PtrHB7-suppressed plants displayed significant changes in vascular tissues with a reduction in xylem but increase in phloem. Transcriptional analysis revealed that genes regulating xylem differentiation were down-regulated, whereas genes regulating phloem differentiation were up-regulated. Correspondingly, PtrHB7 overexpression enhanced differentiation of cambial cells toward xylem cells but inhibited phloem differentiation. PtrHB7 regulation on cambial cell differentiation was associated with its transcript abundance. Together, the results demonstrated that PtrHB7 plays a critical role in controlling a balanced differentiation between secondary xylem and phloem tissues in the process of Populus secondary growth in a dosage-dependent manner.

关键词： HD-Zip III cambium xylem fiber cell secondary growth Populus.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：