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onnes956

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baiyuefei

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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

查看期刊信息











  














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
3楼2014-03-16 15:16:21
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baiyuefei

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风雪

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【答案】应助回帖

感谢参与,应助指数 +1
2楼2014-03-16 15:15:52
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baiyuefei

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【答案】应助回帖

★ ★ ★ ★ ★
onnes956: 金币+5, ★★★很有帮助, 谢谢啦,虽然我已经查到了,应证了下确实是这个号 2014-03-17 00:23:52
oven1986: 检索EPI+1, 感谢应助,鼓励一下! 2014-03-17 17:46:22
入藏号: WOS:000329868000022
4楼2014-03-16 15:16:44
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