| dc.contributor.author |
Rigas, S |
en |
| dc.contributor.author |
Ditengou, FA |
en |
| dc.contributor.author |
Ljung, K |
en |
| dc.contributor.author |
Daras, G |
en |
| dc.contributor.author |
Tietz, O |
en |
| dc.contributor.author |
Palme, K |
en |
| dc.contributor.author |
Hatzopoulos, P |
en |
| dc.date.accessioned |
2014-06-06T06:52:48Z |
|
| dc.date.available |
2014-06-06T06:52:48Z |
|
| dc.date.issued |
2013 |
en |
| dc.identifier.issn |
0028646X |
en |
| dc.identifier.uri |
http://dx.doi.org/10.1111/nph.12092 |
en |
| dc.identifier.uri |
http://62.217.125.90/xmlui/handle/123456789/6180 |
|
| dc.subject |
Auxin transport |
en |
| dc.subject |
Gravitropism |
en |
| dc.subject |
PIN1 |
en |
| dc.subject |
Root hair |
en |
| dc.subject |
TRH1 |
en |
| dc.subject.other |
Arabidopsis protein |
en |
| dc.subject.other |
carrier protein |
en |
| dc.subject.other |
cation transport protein |
en |
| dc.subject.other |
indole derivative |
en |
| dc.subject.other |
indoleacetic acid derivative |
en |
| dc.subject.other |
lenticin |
en |
| dc.subject.other |
phytohormone |
en |
| dc.subject.other |
PIN1 protein, Arabidopsis |
en |
| dc.subject.other |
TRH1 protein, Arabidopsis |
en |
| dc.subject.other |
dicotyledon |
en |
| dc.subject.other |
environmental cue |
en |
| dc.subject.other |
gravity field |
en |
| dc.subject.other |
homeostasis |
en |
| dc.subject.other |
hormone |
en |
| dc.subject.other |
morphogenesis |
en |
| dc.subject.other |
mutation |
en |
| dc.subject.other |
phytochemistry |
en |
| dc.subject.other |
root system |
en |
| dc.subject.other |
transgenic plant |
en |
| dc.subject.other |
translocation |
en |
| dc.subject.other |
trichome |
en |
| dc.subject.other |
Arabidopsis |
en |
| dc.subject.other |
article |
en |
| dc.subject.other |
chemistry |
en |
| dc.subject.other |
drug effect |
en |
| dc.subject.other |
gene expression regulation |
en |
| dc.subject.other |
genetics |
en |
| dc.subject.other |
gravitropism |
en |
| dc.subject.other |
growth, development and aging |
en |
| dc.subject.other |
homeostasis |
en |
| dc.subject.other |
meristem |
en |
| dc.subject.other |
metabolism |
en |
| dc.subject.other |
physiology |
en |
| dc.subject.other |
plant root |
en |
| dc.subject.other |
transgenic plant |
en |
| dc.subject.other |
transport at the cellular level |
en |
| dc.subject.other |
Arabidopsis |
en |
| dc.subject.other |
Arabidopsis Proteins |
en |
| dc.subject.other |
Biological Transport |
en |
| dc.subject.other |
Cation Transport Proteins |
en |
| dc.subject.other |
Gene Expression Regulation, Plant |
en |
| dc.subject.other |
Gravitropism |
en |
| dc.subject.other |
Homeostasis |
en |
| dc.subject.other |
Indoleacetic Acids |
en |
| dc.subject.other |
Indoles |
en |
| dc.subject.other |
Membrane Transport Proteins |
en |
| dc.subject.other |
Meristem |
en |
| dc.subject.other |
Plant Growth Regulators |
en |
| dc.subject.other |
Plant Roots |
en |
| dc.subject.other |
Plants, Genetically Modified |
en |
| dc.subject.other |
Arabidopsis |
en |
| dc.title |
Root gravitropism and root hair development constitute coupled developmental responses regulated by auxin homeostasis in the Arabidopsis root apex |
en |
| heal.type |
journalArticle |
en |
| heal.identifier.primary |
10.1111/nph.12092 |
en |
| heal.publicationDate |
2013 |
en |
| heal.abstract |
Active polar transport establishes directional auxin flow and the generation of local auxin gradients implicated in plant responses and development. Auxin modulates gravitropism at the root tip and root hair morphogenesis at the differentiation zone. Genetic and biochemical analyses provide evidence for defective basipetal auxin transport in trh1 roots. The trh1, pin2, axr2 and aux1 mutants, and transgenic plants overexpressing PIN1, all showing impaired gravity response and root hair development, revealed ectopic PIN1 localization. The auxin antagonist hypaphorine blocked root hair elongation and caused moderate agravitropic root growth, also leading to PIN1 mislocalization. These results suggest that auxin imbalance leads to proximal and distal developmental defects in Arabidopsis root apex, associated with agravitropic root growth and root hair phenotype, respectively, providing evidence that these two auxin-regulated processes are coupled. Cell-specific subcellular localization of TRH1-YFP in stele and epidermis supports TRH1 engagement in auxin transport, and hence impaired function in trh1 causes dual defects of auxin imbalance. The interplay between intrinsic cues determining root epidermal cell fate through the TTG/GL2 pathway and environmental cues including abiotic stresses modulates root hair morphogenesis. As a consequence of auxin imbalance in Arabidopsis root apex, ectopic PIN1 mislocalization could be a risk aversion mechanism to trigger root developmental responses ensuring root growth plasticity. © 2012 The Authors. New Phytologist © 2012 New Phytologist Trust. |
en |
| heal.journalName |
New Phytologist |
en |
| dc.identifier.issue |
4 |
en |
| dc.identifier.volume |
197 |
en |
| dc.identifier.doi |
10.1111/nph.12092 |
en |
| dc.identifier.spage |
1130 |
en |
| dc.identifier.epage |
1141 |
en |