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Review
. 2002;14 Suppl(Suppl):S153-64.
doi: 10.1105/tpc.000679.

The jasmonate signal pathway

John G Turner  1 , Christine Ellis, Alessandra Devoto
Affiliations
Review

The jasmonate signal pathway

John G Turner et al. Plant Cell. 2002.
No abstract available

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Figures

Figure 1.
Figure 1.
Gene Expression in JA Mutants Reveals Interaction between Defense Signal Transduction Pathways. Two μg of total RNA from each sample was analyzed on gel blots on nylon filters. Filters were probed with radiolabeled, polymerase chain reaction–generated DNA fragments from PR1, PDF1.2, Thi2.1, and 18S rRNA genes. (A) Seedlings were grown for 10 days on Murashige and Skoog (MS) agar, then transferred to fresh MS agar (−) or MS agar supplemented with 50 μM SA for 2 further days (+). (B) Seedlings were grown for 12 days on MS agar. (C) Model for positive (arrows) and negative (bars) interactions between the JA, ethylene, and SA signal pathways during response to pathogens, and pests or wounding. Gene symbols (in italics) are defined in the text; proteins are upper case, not italic.
Figure 2.
Figure 2.
Model for the Biosynthesis of JAs. (A) Abbreviations for enzyme names are underlined; abbreviations for names of intermediates are in bold; pathway inputs and outputs are in italic. (B) Structure of sn1-O-(12-oxophytodienoyl)-sn2-O-(hexadecatrienoyl)-monogalactosyl diglyceride, a chloroplast membrane oxylipin containing esterified OPDA.
Figure 3.
Figure 3.
Binding of COI1 with SKP1-like Protein ASK1 in Arabidopsis Indicates that a SCFcoi1 E3 Ligase Regulates JA Responses. (A) A protein immunoblot analysis of α-HA immunoprecipitates (IPα-HA; lanes1–5) or total protein extracts (T; lanes 6–11) obtained from MeJA-treated seedlings of independent transgenic Arabidopsis thaliana T2 lines expressing COI1 as haemoagglutinin (HA) carboxy- or amino-terminal fusion proteins (COI1::HA or HA::COI1). Top: detection with monoclonal α-HA antibody (Roche). Bottom: detection with polyclonal antisera raised against Arabidopsis SKP1 (αASK1). GUS::HA: Arabidopsis transgenic lines expressing GUS and HA carboxy-terminal fusion. (B) A model for how COI1 may regulate JA-dependent defense responses and JA-dependent stamen and pollen development in Arabidopsis, through the E3 ubiquitin ligase–dependent modification of hypothetical repressors R1 and R2 of these two processes.
Figure 4.
Figure 4.
The Effect of MeJA and Ethylene on the Morphology of Arabidopsis Seedlings Indicates Interaction between These Signal Pathways in Development. Ethylene (ET) induces a pronounced apical hook in wild-type Col-gl1 seedlings but not in the ethylene-insensitive mutant, etr1-3. The mutant constitutive triple response (ctr1) has an apical hook even in the absence of ethylene. Treatment with MeJA (MeJA), suppresses the apical hook in Col-gl1 and ctr1, but not in the JA-insensitive mutant coi1-16. cev1 has constitutive JA and ET signaling (see Figure 2), and responds appropriately to exogenous MeJA and ET; ET responses in cev1 are suppressed in the etr1-3 background. (−), no treatment.
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