Plant Cell Reports 31: 253-270 (2012)

Beyond gibberellins and abscisic acid: how ethylene and jasmonates control seed germination

Ada Linkies*, Gerhard Leubner-Metzger
*corresponding author:
University of Freiburg, Faculty of Biology, Institute for Biology II, Botany / Plant Physiology, Schänzlestr. 1, D-79104 Freiburg, Germany, Web: 'The Seed Biology Place'

Received: 27 September 2011; Revised: 13 October 2011; Accepted 13 October 2011; Published online 02 November 2011
DOI: 10.1007/s00299-011-1180-1

Ethylene biosynthesis

Fig. 3. Ethylene biosynthesis pathway and gene expression regulation during Arabidopsis thaliana seed germination.

Ethylene biosynthesis as discovered by (Yang and Hoffman 1984). Key step during seed germination is the conversion of ACC to ethylene via ACC oxidases (Linkies et al. 2009; Matilla and Matilla-Vázquez 2008).

b and c Relative transcript expression results obtained by eNorthern analyses of data from the BAR expression browser at (Toufighi et al. 2005) based on experiments for non-dormant, non-stratified after-ripened wild type seeds (Nakabayashi et al. 2005; Preston et al. 2009), cold-stratified wild type seeds (Yamauchi et al. 2004), ABA-treated wild-type and GA-treated ga1-3 seeds (RIKEN transcriptome sets). Shown are relative transcript abundance ratios based on seed imbibition time in the light (24h / 0h), ABA treatment (ABA / control at 24h), cold stratification (4ºC / 22ºC after 96h imbibition in darkness), and GA treatment (GA / control at 6h). Abbreviations: ACC= 1-aminocyclopropane-1-carboxylic acid, MTA=  methylthioadenosine, MTR= methylthioribose, SAM= S-AdoMet.

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