Počet záznamů: 1
Abscisic Acid Represses Growth of the Arabidopsis Embryonic Axis after Germination by Enhancing Auxin Signaling
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SYSNO ASEP 0337484 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Abscisic Acid Represses Growth of the Arabidopsis Embryonic Axis after Germination by Enhancing Auxin Signaling Tvůrce(i) Belin, Ch. (CH)
Megies, Ch. (CH)
Hauserová, Eva (UEB-Q)
Lopez-Molina, L. (CH)Zdroj.dok. Plant Cell. - : Oxford University Press - ISSN 1040-4651
Roč. 21, č. 8 (2009), s. 2253-2268Poč.str. 17 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova SEED-GERMINATION ; HYPOCOTYL ELONGATION ; ROOT GRAVITROPISM Vědní obor RIV ED - Fyziologie CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000270416700008 DOI 10.1105/tpc.109.067702 Anotace Under unfavorable environmental conditions, the stress phytohormone ABA inhibits the developmental transition from an embryo in a dry seed into a young seedling. We developed a genetic screen to isolate Arabidopsis thaliana mutants whose early seedling development is resistant to ABA. Here, we report the identification of a recessive mutation in AUXIN RESISTANT1 (AUX1), encoding a cellular auxin influx carrier. Although auxin is a major morphogenesis hormone in plants, little is known about ABA-auxin interactions during early seedling growth. We show that aux1 and pin2 mutants are insensitive to ABA-dependent repression of embryonic axis (hypocotyl and radicle) elongation. Genetic and physiological experiments show that this involves auxin transport to the embryonic axis elongation zone, where ABA enhances the activity of an auxin-responsive promoter. We propose that ABA represses embryonic axis elongation by potentiating auxin signaling in its elongation zone. Pracoviště Ústav experimentální botaniky Kontakt David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Rok sběru 2010
Počet záznamů: 1