共 36 条
Auxin transport through non-hair cells sustains root-hair development
被引:180
作者:

Jones, Angharad R.
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机构:
Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Kramer, Eric M.
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机构:
Bard Coll Simons Rock, Dept Phys, Massachusetts, MA 01230 USA
Univ Nottingham, Ctr Plant Integrat Biol, Loughborough LE12 5RD, Leics, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Knox, Kirsten
论文数: 0 引用数: 0
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机构:
Univ York, Dept Biol, York YO10 5YW, N Yorkshire, England
Univ Edinburgh, Inst Mol Plant Sci, Edinburgh EH9 3JR, Midlothian, Scotland Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Swarup, Ranjan
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机构:
Univ Nottingham, Sch Biosci, Plant Sci Div, Loughborough LE12 5RD, Leics, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Bennett, Malcolm J.
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Nottingham, Sch Biosci, Plant Sci Div, Loughborough LE12 5RD, Leics, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Lazarus, Colin M.
论文数: 0 引用数: 0
h-index: 0
机构:
Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Leyser, H. M. Ottoline
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h-index: 0
机构:
Univ York, Dept Biol, York YO10 5YW, N Yorkshire, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England

Grierson, Claire S.
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h-index: 0
机构:
Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England
机构:
[1] Univ Bristol, Sch Biol Sci, Bristol BS8 1UG, Avon, England
[2] Bard Coll Simons Rock, Dept Phys, Massachusetts, MA 01230 USA
[3] Univ Nottingham, Ctr Plant Integrat Biol, Loughborough LE12 5RD, Leics, England
[4] Univ York, Dept Biol, York YO10 5YW, N Yorkshire, England
[5] Univ Edinburgh, Inst Mol Plant Sci, Edinburgh EH9 3JR, Midlothian, Scotland
[6] Univ Nottingham, Sch Biosci, Plant Sci Div, Loughborough LE12 5RD, Leics, England
基金:
英国生物技术与生命科学研究理事会;
关键词:
LATERAL ROOT;
ARABIDOPSIS;
EFFLUX;
PIN;
TRAFFICKING;
POLARITY;
LOCALIZATION;
INFORMATION;
ELONGATION;
EPIDERMIS;
D O I:
10.1038/ncb1815
中图分类号:
Q2 [细胞生物学];
学科分类号:
071009 ;
090102 ;
摘要:
The plant hormone auxin controls root epidermal cell development in a concentration-dependent manner(1-3). Root hairs are produced on a subset of epidermal cells as they increase in distance from the root tip. Auxin is required for their initiation(4-7) and continued growth(8-11), but little is known about its distribution in this region of the root. Contrary to the expectation that hair cells might require active auxin influx to ensure auxin supply, we did not detect the auxin-influx transporter AUX1 in root-hair cells. A high level of AUX1 expression was detected in adjacent non-hair cell files. Non-hair cells were necessary to achieve wild-type root-hair length, although an auxin response was not required in these cells. Three-dimensional modelling of auxin flow in the root tip suggests that AUX1-dependent transport through non-hair cells maintains an auxin supply to developing hair cells as they increase in distance from the root tip, and sustains root-hair outgrowth. Experimental data support the hypothesis that instead of moving uniformly though the epidermal cell layer(3,12), auxin is mainly transported through canals that extend longitudinally into the tissue.
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收藏
页码:78 / U156
页数:19
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