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【答案】应助回帖
TIME FOR COFFEE controls root meristem size by changes in auxin accumulation in Arabidopsis
作者:Hong, LW (Hong, Li-Wei)[ 1 ] ; Yan, DW (Yan, Da-Wei)[ 1 ] ; Liu, WC (Liu, Wen-Cheng)[ 1 ] ; Chen, HG (Chen, Hong-Guo)[ 2 ] ; Lu, YT (Lu, Ying-Tang)[ 1 ]
JOURNAL OF EXPERIMENTAL BOTANY
卷: 65
期: 1
页: 275-286
DOI: 10.1093/jxb/ert374
出版年: JAN 2014
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摘要
Roots play important roles in plant survival and productivity as they not only anchor the plants in the soil but are also the primary organ for the uptake of nutrients from the outside. The growth and development of roots depend on the specification and maintenance of the root meristem. Here, we report a previously unknown role of TIME FOR COFFEE (TIC) in controlling root meristem size in Arabidopsis. The results showed that loss of function of TIC reduced root meristem length and cell number by decreasing the competence of meristematic cells to divide. This was due to the repressed expression of PIN genes for decreased acropetal auxin transport in tic-2, leading to low auxin accumulation in the roots responsible for reduced root meristem, which was verified by exogenous application of indole-3-acetic acid. Downregulated expression of PLETHORA1 (PLT1) and PLT2, key transcription factors in mediating the patterning of the root stem cell niche, was also assayed in tic-2. Similar results were obtained with tic-2 and wild-type plants at either dawn or dusk. We also suggested that the MYC2-mediated jasmonic acid signalling pathway may not be involved in the regulation of TIC in controlling the root meristem. Taken together, these results suggest that TIC functions in an auxinPLTs loop for maintenance of post-embryonic root meristem.
关键词
作者关键词:Arabidopsis thaliana; auxin; circadian clock; jasmonic acid; MYC2; PIN; root meristem; TIME FOR COFFEE
KeyWords Plus:STEM-CELL NICHE; BHLH TRANSCRIPTION FACTORS; JASMONATE RESPONSES; GROWTH; EXPRESSION; TRANSPORT; THALIANA; GENES; MYC2; DIFFERENTIATION
作者信息
通讯作者地址: Lu, YT (通讯作者)
Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China.
地址:
[ 1 ] Wuhan Univ, Coll Life Sci, Wuhan 430072, Peoples R China
[ 2 ] Hubei Univ Sci & Technol, Coll Chem & Biol, Xianning 437100, Hubei Province, Peoples R China
电子邮件地址:yingtlu@whu.edu.cn
基金资助致谢
基金资助机构
授权号
National Natural Science Foundation of China
90917001
Chinese Ministry of Education
311026
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出版商
OXFORD UNIV PRESS, GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
类别 / 分类
研究方向 lant Sciences
Web of Science 类别lant Sciences
文献信息
文献类型:Article
语种:English
入藏号: WOS:000329868000022
ISSN: 0022-0957
电子 ISSN: 1460-2431
期刊信息
Impact Factor (影响因子): Journal Citation Reports®
其他信息
IDS 号: 291YE
Web of Science 核心合集中的 "引用的参考文献": 50
Web of Science 核心合集中的 "被引频次": 0 |
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