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Title

Abscisic acid transporters cooperate to control seed germination

Authors
Kang, Joohyun
Yim, Sojeong
Choi, Hyunju
Kim, Areum
Martinoia, Enrico
Lee, Youngsook
Published in Nature Communications. 2015, vol. 6, p. 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
Identifiers
PMID: 26334616
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Research group Groupe Lopez-Molina
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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

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Deposited on : 2016-11-16

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