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@article{760874,
author = {Růžička, Kamil and Ljung, Karin and Vanneste, Steffen and Podhorská, Radka and Beeckman, Tom and Friml, Jiří and Benková, Eva},
article_number = {7},
keywords = {GENE FAMILY-MEMBERS; F BOX PROTEIN TIR1; ARABIDOPSIS-THALIANA; HYPOCOTYL ELONGATION; INSENSITIVE MUTANTS; SIGNAL-TRANSDUCTION; PLANT DEVELOPMENT; RESPONSE PATHWAY; CELL ELONGATION},
language = {eng},
issn = {1040-4651},
journal = {PLANT CELL},
title = {Ethylene regulates root growth through effects on auxin biosynthesis and transport-dependent auxin distribution},
volume = {19},
year = {2007}
}
TY - JOUR
ID - 760874
AU - Růžička, Kamil - Ljung, Karin - Vanneste, Steffen - Podhorská, Radka - Beeckman, Tom - Friml, Jiří - Benková, Eva
PY - 2007
TI - Ethylene regulates root growth through effects on auxin biosynthesis and transport-dependent auxin distribution
JF - PLANT CELL
VL - 19
IS - 7
SP - 2197-2212
EP - 2197-2212
SN - 10404651
KW - GENE FAMILY-MEMBERS
KW - F BOX PROTEIN TIR1
KW - ARABIDOPSIS-THALIANA
KW - HYPOCOTYL ELONGATION
KW - INSENSITIVE MUTANTS
KW - SIGNAL-TRANSDUCTION
KW - PLANT DEVELOPMENT
KW - RESPONSE PATHWAY
KW - CELL ELONGATION
N2 - In plants, each developmental process integrates a network of signaling events that are regulated by different phytohormones, and interactions among hormonal pathways are essential to modulate their effect. Continuous growth of roots results from the postembryonic activity of cells within the root meristem that is controlled by the coordinated action of several phytohormones, including auxin and ethylene. Although their interaction has been studied intensively, the molecular and cellular mechanisms underlying this interplay are unknown. We show that the effect of ethylene on root growth is largely mediated by the regulation of the auxin biosynthesis and transport-dependent local auxin distribution. Ethylene stimulates auxin biosynthesis and basipetal auxin transport toward the elongation zone, where it activates a local auxin response leading to inhibition of cell elongation. Consistently, in mutants affected in auxin perception or basipetal auxin transport, ethylene cannot activate the auxin response nor regulate the root growth. In addition, ethylene modulates the transcription of several components of the auxin transport machinery. Thus, ethylene achieves a local activation of the auxin signaling pathway and regulates root growth by both stimulating the auxin biosynthesis and by modulating the auxin transport machinery.
ER -
RŮŽIČKA, Kamil, Karin LJUNG, Steffen VANNESTE, Radka PODHORSKÁ, Tom BEECKMAN, Jiří FRIML and Eva BENKOVÁ. Ethylene regulates root growth through effects on auxin biosynthesis and transport-dependent auxin distribution. \textit{PLANT CELL}. 2007, vol.~19, No~7, p.~2197-2212. ISSN~1040-4651.
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