Dynamics of cytoskeleton in differentiation of xylem cells of trees grown under the environmental stress
环境胁迫下树木木质部细胞分化的细胞骨架动态
基本信息
- 批准号:17580137
- 负责人:
- 金额:$ 2.43万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The cell division of cambial cells and differentiation of their derivatives in trees produce sustainable wood biomass. The quantity and quality of wood vary depending on the environmental conditions of growth of trees. Trees usually grow under the several environmental stresses such as high or low temperature, drought, acid rain, and ozone etc. Such stresses result in decrease in wood quantity through the inhibition of cambial activity. In this project, we analyzed the cellular mechanism how low temperature, one of environmental stresses, affects the cambial activity and xylem differentiation. Microtubules in active cambial cells depolymerize in response to low temperatures and, thus, it is generally necessary to avoid low temperatures during the fixation of samples. However, we found clear bundles of microtubules in dormant cambial cells in mid-winter, when the temperature was below zero. In addition, microtubules in dormant cambial cells did not depolymerize by the fixation of samples under low temperature. These observations suggest the stability of microtubules in dormant cambium at low temperatures. Such stability might be related to endogenous factors in cambial cells since the cold stability of microtubules can be modified by plant hormones, such as gibberellin and abscisic acid. In addition, it is likely that microtubules in active and dormant cambial cells consist of different isotypes of tubulin whose polymerization exhibits different degrees of cold stability. We conclude that the cold stability of microtubules is closely related to the adaptation to environmental conditions of trees, therefore controlling the quantity and quality of wood biomass.
树木形成层细胞的细胞分裂及其衍生物的分化产生可持续的木材生物量。木材的数量和质量取决于树木生长的环境条件。树木生长过程中常受到高温、低温、干旱、酸雨、臭氧等多种环境胁迫的影响,这些胁迫通过抑制形成层的活动而导致木材产量的减少。本课题以低温胁迫为研究对象,分析了低温胁迫对形成层活性和木质部分化的影响机制。活性形成层细胞中的微管对低温作出反应,因此,在样品固定过程中通常需要避免低温。然而,我们发现在仲冬,当温度低于零度时,在休眠的形成层细胞中有清晰的微管束。此外,形成层休眠细胞中的微管不因低温固定而脱落。这些观察结果表明,微管在休眠形成层在低温下的稳定性。这种稳定性可能与形成层细胞中的内源性因素有关,因为微管的冷稳定性可以被植物激素如赤霉素和脱落酸改变。此外,很可能是活跃和休眠的形成层细胞中的微管由不同的微管蛋白同种型组成,其聚合表现出不同程度的冷稳定性。因此,微管的冷稳定性与树木对环境条件的适应密切相关,从而控制着木材生物量的数量和质量。
项目成果
期刊论文数量(15)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Allocation of photoassimilated ^<13>C from reproductive and non-reproductive shoots to the fruit of the angiosperm tree Styrax obassia
将来自生殖和非生殖芽的光同化^ 13 C分配给被子植物树Styrax obassia的果实
- DOI:
- 发表时间:2007
- 期刊:
- 影响因子:0
- 作者:Yoshiyuki;Inagaki;et. al.;Miyazaki et al.
- 通讯作者:Miyazaki et al.
Effect of polyamines and L-omithine on the development of proembryogenic masses of Cryptomeria japonica
多胺和L-鸟氨酸对柳杉原胚块发育的影响
- DOI:
- 发表时间:2006
- 期刊:
- 影响因子:0
- 作者:Miyazaki;et al.;Nakagawa et al.;Nakaba et al.;Nakagawa et al.
- 通讯作者:Nakagawa et al.
The orientation of cellulose microfibrils in the cell walls of tracheids in conifer : A model based on observation by Field emission-Scanning electron microscopy
针叶树管胞细胞壁中纤维素微纤维的取向:基于场发射扫描电子显微镜观察的模型
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Abe;H.;Funada;R.
- 通讯作者:R.
The orientation of cellulose microfibrils in the cell walls of tracheids in conifer : A model based on observations by Field emission-Scanning electron microscopy
针叶树管胞细胞壁中纤维素微纤维的取向:基于场发射扫描电子显微镜观察的模型
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Abe;H.;Funada;R.
- 通讯作者:R.
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FUNADA Ryo其他文献
Current technology aspects on highly durable wooden houses
高度耐用的木屋的当前技术方面
- DOI:
- 发表时间:
2011 - 期刊:
- 影响因子:0
- 作者:
ORIBE Yuichiro;KIJIDANI Yoshio;BEGUM Shahanara;KUBO Takafumi;FUNADA Ryo;S. Doi - 通讯作者:
S. Doi
Factors regulating cambial reactivation and re-initiation of xylem differentiation.
调节形成层重新激活和木质部分化重新启动的因素。
- DOI:
- 发表时间:
2010 - 期刊:
- 影响因子:0
- 作者:
ORIBE Yuichiro;KIJIDANI Yoshio;BEGUM Shahanara;KUBO Takafumi;FUNADA Ryo - 通讯作者:
FUNADA Ryo
広葉樹形成層帯での内生IAA量の季節変化と内生IAA定量方法の検討
阔叶形成层区内源IAA含量的季节变化及内源IAA定量方法的探讨
- DOI:
- 发表时间:
2010 - 期刊:
- 影响因子:0
- 作者:
ORIBE Yuichiro;KIJIDANI Yoshio;BEGUM Shahanara;KUBO Takafumi;FUNADA Ryo;S. Doi;織部雄一朗 - 通讯作者:
織部雄一朗
FUNADA Ryo的其他文献
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{{ truncateString('FUNADA Ryo', 18)}}的其他基金
Direct imaging analysis of mechanism of differentiation and cell death of secondary xylem cells in trees
树木次生木质部细胞分化和细胞死亡机制的直接成像分析
- 批准号:
24380090 - 财政年份:2012
- 资助金额:
$ 2.43万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Mechanism of regulation of cell differentiation in directly induced secondary xylem in trees
树木直接诱导次生木质部细胞分化的调控机制
- 批准号:
21380107 - 财政年份:2009
- 资助金额:
$ 2.43万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
Real-time analysis of cytoskeleton in secondary xylem that is directly induced from cultured cells in trees
实时分析由树木培养细胞直接诱导的次生木质部细胞骨架
- 批准号:
19580183 - 财政年份:2007
- 资助金额:
$ 2.43万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Dynamics of cytoskeleton myosin during the differentiation of xylem cells in trees
树木木质部细胞分化过程中细胞骨架肌球蛋白的动态
- 批准号:
14560127 - 财政年份:2002
- 资助金额:
$ 2.43万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Radial growth and cell wall structure of trees grown under elevated carbon dioxide concentrations
在高二氧化碳浓度下生长的树木的径向生长和细胞壁结构
- 批准号:
11460076 - 财政年份:1999
- 资助金额:
$ 2.43万 - 项目类别:
Grant-in-Aid for Scientific Research (B)
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