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Nitrate-Regulated Auxin Transport by NRT1.1 Defines a Mechanism for Nutrient Sensing in Plants

SYSNO ASEP	0343963
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Nitrate-Regulated Auxin Transport by NRT1.1 Defines a Mechanism for Nutrient Sensing in Plants
Author(s)	Krouk, G. (FR) Lacombe, B. (FR) Bielach, A. (BE) Perrine-Walker, F. (FR) Malínská, Kateřina (UEB-Q)_{RID, ORCID} Mounier, E. (FR) Hoyerová, Klára (UEB-Q)_{RID, ORCID} Tillard, P. (FR) Leon, S. (FR) Ljung, K. (SE) Zažímalová, Eva (UEB-Q)_{RID, ORCID} Benková, E. (BE) Nacry, P. (FR) Gojon, A. (FR)
Source Title	Developmental Cell. - : Cell Press - ISSN 1534-5807 Roč. 18, č. 6 (2010), s. 927-937
Number of pages	11 s.
Language	eng - English
Country	US - United States
Keywords	SIGNALING ; DEVBIO ; PROTEINS
Subject RIV	ED - Physiology
R&D Projects	LC06034 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z50380511 - UEB-Q (2005-2011)
UT WOS	000279366200008
DOI	10.1016/j.devcel.2010.05.008
Annotation	Nitrate is both a nitrogen source for higher plants and a signal molecule regulating their development. In Arabidopsis, the NRT1.1 nitrate transporter is crucial for nitrate signaling governing root growth, and has been proposed to act as a nitrate sensor. However, the sensing mechanism is unknown. Herein we show that NRT1.1 not only transports nitrate but also facilitates uptake of the phytohormone auxin. Moreover, nitrate inhibits NRT1.1-dependent auxin uptake, suggesting that transduction of nitrate signal by NRT1.1 is associated with a modification of auxin transport. Among other effects, auxin stimulates lateral root development. Mutation of NRT1.1 enhances both auxin accumulation in lateral roots and growth of these roots at low, but not high, nitrate concentration. Thus, we propose that NRT1.1 represses root growth at low nitrate availability by promoting basipetal auxin transport out of these roots. This defines a mechanism connecting nutrient and hormone signaling during organ development.
Workplace	Institute of Experimental Botany
Contact	David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
Year of Publishing	2011

Number of the records: 1