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Maize AUXIN-BINDING PROTEIN 1 and AUXIN-BINDING PROTEIN 4 impact on leaf growth, elongation, and seedling responsiveness to auxin and light

SYSNO ASEP	0384338
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Maize AUXIN-BINDING PROTEIN 1 and AUXIN-BINDING PROTEIN 4 impact on leaf growth, elongation, and seedling responsiveness to auxin and light
Author(s)	Jurišić-Knežev, Dejana (UEB-Q) Čudejková, Mária (UEB-Q) Zalabák, David (UEB-Q)_ORCID Hlobilová, Marta (UEB-Q) Rolčík, Jakub (UEB-Q) Pěnčík, Aleš (UEB-Q)_{ORCID, RID, SAI} Bergougnoux, Véronique (UEB-Q) Fellner, Martin (UEB-Q)_{RID, ORCID}
Source Title	Botany. - : Canadian Science Publishing - ISSN 1916-2790 Roč. 90, č. 10 (2012), s. 990-1006
Number of pages	17 s.
Language	eng - English
Country	CA - Canada
Keywords	auxin ; auxin-binding protein ; growth
Subject RIV	EF - Botanics
R&D Projects	1P05ME792 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z50380511 - UEB-Q (2005-2011)
UT WOS	000310439600007
DOI	10.1139/B2012-071
Annotation	In maize, at least five auxin-binding proteins (ABPs) have been identified, yet their functions remain unclear. The present study reports the use of maize abp1, abp4, and abp1abp4 mutants to investigate the role of ABPs during maize growth and development. Single and double abp mutant plants grown in a greenhouse differ from the wild type (WT) in their leaf declination and leaf blade growth. The effect of the dark (D), blue light (BL), red light (RL), and exogenous auxin on the development of mutant seedlings was also studied. Relative to WT, etiolated mutant seedlings were shorter and showed a reduced responsiveness to exogenous auxin. In BL or RL, the responsiveness of maize seedlings to auxin was distinctly less than in D. The reducing effect of light on seedling responsiveness to auxin is mediated at least by phytochromes. The suppression of ABP1 and (or) ABP4 led to a distinct accumulation of free indole-3-acetic acid (IAA) in etiolated and light-grown seedling organs. We concluded that ABP1 and ABP4 participate in the growth of maize seedlings, mediate seedling responses to auxin, and interact with light signaling pathway(s). We also deduce a functional interaction between ABP1 and ABP4, which is that the relationship between them is light-, organ- and response-dependent.
Workplace	Institute of Experimental Botany
Contact	David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469
Year of Publishing	2013

Number of the records: 1