Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus
Ethylene is an endogenous stimulator of cell division in the cambial meristem of Populus
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DOI：
10.1073/pnas.0811660106
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发表时间：
2009-04-07
影响因子：
11.1
通讯作者：
Sundberg, Bjorn
中科院分区：
文献类型：
--
作者：
Love, Jonathan;Bjorklund, Simon;Sundberg, Bjorn
植物激素乙烯是植物生长对环境信号反应的重要信号。在营养生长中，乙烯通常被认为是细胞扩张的调节剂，但基于药理学实验和乙烯过量产生突变体，也提出了控制分生组织生长的作用。在这项研究中，我们使用的转基因乙烯不敏感和乙烯过量生产的混合白杨（山杨x tremuloides）结合实验中使用的乙烯感知抑制剂[1-甲基环丙烯（1-MCP）]，以证明内源性乙烯产生的响应倾斜刺激细胞分裂的形成层分生组织。这种乙烯控制的生长引起了与张力木材相关的杨树茎的偏心率。
The plant hormone ethylene is an important signal in plant growth responses to environmental cues. In vegetative growth, ethylene is generally considered as a regulator of cell expansion, but a role in the control of meristem growth has also been suggested based on pharmacological experiments and ethylene-overproducing mutants. In this study, we used transgenic ethylene-insensitive and ethylene-overproducing hybrid aspen (Populus tremula x tremuloides) in combination with experiments using an ethylene perception inhibitor [1-methylcyclopropene (1-MCP)] to demonstrate that endogenous ethylene produced in response to leaning stimulates cell division in the cambial meristem. This ethylene-controlled growth gives rise to the eccentricity of Populus stems that is formed in association with tension wood.