Dynamical and Microrheological Analysis of Amyloplasts in the Plant Root Gravity-Sensing Cells
文献类型：期刊论文
| 作者 | Zheng, Zhongyu1; Zou, Junjie; Li, Hanhai1; Xue, Shan; Le, Jie ; Wang, Yuren1
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| 刊名 | MICROGRAVITY SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2015 |
| 卷号 | 27期号:6页码:485-493 |
| 关键词 | Plant gravitropism Gravity sensing Amyloplasts Columella cells Microrheology Diffusion Cage-confinement |
| ISSN号 | 0938-0108 |
| DOI | 10.1007/s12217-015-9445-x |
| 文献子类 | Article |
| 英文摘要 | Gravitropism in plants is one of the most controversial issues. In the most wildly accepted starch-statolith hypothesis the sedimentation movement of amyloplasts in the gravisensing columella cells primarily triggers the asymmetric distribution of auxin which leads to the differential growth of the plant root. It has been gradually recognized that the inhomogeneous structures in statocytes arising from intracellular components such as cytoskeletons significantly affect the complex movements of amyloplasts and the final gravimorphogenesis. In this letter, we implement a diffusive dynamics measurement and inplanta microrheological analysis of amyloplasts in the wild-type plants and actin cytoskeleton mutants for the first time. We found that the intracellular environment of columella cells exhibits the spatial heterogeneity and the cage-confinement on amyloplasts which is the typically characteristics in colloidal suspensions. By comparing the distinct diffusive dynamics of amyloplasts in different types of plants with the behaviors of colloidal systems in different states, we quantitatively characterized the influence of the actin organization dominated intracellular envoronments on the amyloplast movements. Furthermore, the cage-confinement strength was measured by calculating the spatial fluctuation of local apparent viscosity within the columella cells. Finally, a linear association between the initial mechanical stimulation in the columella cells the subsequent intercellular signal transduction and the final gravity response was observed and a possible gravity sensing mechanism was suggested. It suggests the existence of a potential gravity-sensing mechanism that dictates a linear frustration effect of the actin cytoskeleton on the conversion of the mechanical stimulation of amyloplasts into gravitropic signals. |
| 学科主题 | Engineering, Aerospace ; Thermodynamics ; Mechanics |
| 出版地 | NEW YORK |
| 电子版国际标准刊号 | 1875-0494 |
| WOS关键词 | AUXIN ; GRAVITROPISM ; DISRUPTION ; TRANSPORT ; COMPLEX |
| WOS研究方向 | Science Citation Index Expanded (SCI-EXPANDED) |
| 语种 | 英语 |
| WOS记录号 | WOS:000366103800010 |
| 出版者 | SPRINGER |
| 资助机构 | National Basic Research Program of China [2011CB710902, 2011CB710901] ; NSFC [11104286, 11372314] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/25818]  |
| 专题 | 中科院植物分子生理学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Bot, Key Lab Plant Mol Physiol, Beijing 100093, Peoples R China 2.Chinese Acad Sci, Key Lab Micrograv, Inst Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Zhongyu,Zou, Junjie,Li, Hanhai,et al. Dynamical and Microrheological Analysis of Amyloplasts in the Plant Root Gravity-Sensing Cells[J]. MICROGRAVITY SCIENCE AND TECHNOLOGY,2015,27(6):485-493. |
| APA | Zheng, Zhongyu,Zou, Junjie,Li, Hanhai,Xue, Shan,Le, Jie,&Wang, Yuren.(2015).Dynamical and Microrheological Analysis of Amyloplasts in the Plant Root Gravity-Sensing Cells.MICROGRAVITY SCIENCE AND TECHNOLOGY,27(6),485-493. |
| MLA | Zheng, Zhongyu,et al."Dynamical and Microrheological Analysis of Amyloplasts in the Plant Root Gravity-Sensing Cells".MICROGRAVITY SCIENCE AND TECHNOLOGY 27.6(2015):485-493. |
入库方式： OAI收割
来源：植物研究所
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