UNIGE document Scientific Article
previous document  unige:88987  next document
add to browser collection

Abscisic acid transporters cooperate to control seed germination

Kang, Joohyun
Yim, Sojeong
Choi, Hyunju
Kim, Areum
Martinoia, Enrico
Lee, Youngsook
Published in Nature communications. 2015, vol. 6, 8113
Abstract Seed germination is a key developmental process that has to be tightly controlled to avoid germination under unfavourable conditions. Abscisic acid (ABA) is an essential repressor of seed germination. In Arabidopsis, it has been shown that the endosperm, a single cell layer surrounding the embryo, synthesizes and continuously releases ABA towards the embryo. The mechanism of ABA transport from the endosperm to the embryo was hitherto unknown. Here we show that four AtABCG transporters act in concert to deliver ABA from the endosperm to the embryo: AtABCG25 and AtABCG31 export ABA from the endosperm, whereas AtABCG30 and AtABCG40 import ABA into the embryo. Thus, this work establishes that radicle extension and subsequent embryonic growth are suppressed by the coordinated activity of multiple ABA transporters expressed in different tissues.
Keywords ATP-Binding Cassette Transporters/genetics/metabolismAbscisic Acid/metabolismArabidopsis/geneticsArabidopsis Proteins/genetics/metabolismEndosperm/metabolismGene Expression RegulationPlantGermination/geneticsReal-Time Polymerase Chain ReactionReverse Transcriptase Polymerase Chain ReactionSeeds/metabolism
PMID: 26334616
Full text
Article (Published version) (1 MB) - public document Free access
Research group Groupe Lopez-Molina
(ISO format)
KANG, Joohyun et al. Abscisic acid transporters cooperate to control seed germination. In: Nature communications, 2015, vol. 6, p. 8113. doi: 10.1038/ncomms9113 https://archive-ouverte.unige.ch/unige:88987

402 hits



Deposited on : 2016-11-16

Export document
Format :
Citation style :