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PLANT CELL 12 (7): 1117-1126

Copyright © 2000 by the American Society of Plant Physiologists.

Plant Cell, Vol. 12, 1117-1126, July 2000, Copyright © 2000, American Society of Plant Physiologists Regulation of Abscisic Acid Signaling by the Ethylene Response Pathway in Arabidopsis Majid Ghassemiana, Eiji Nambaraa, Sean Cutlera, Hiroshi Kawaideb, Yuji Kamiyab, and Peter McCourta a Department of Botany, 25 Willcocks Street, University of Toronto, Toronto M5S 3B2, Ontario, Canada b Laboratory for Plant Hormone Function, Frontier Research Program, Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan Peter McCourt, mccourt{at} (E-mail), 416-978-5878 (fax)

Although abscisic acid (ABA) is involved in a variety of plant growth and developmental processes, few genes that actually regulate the transduction of the ABA signal into a cellular response have been identified. In an attempt to determine negative regulators of ABA signaling, we identified mutants, designated enhanced response to ABA3 (era3), that increased the sensitivity of the seed to ABA. Biochemical and molecular analyses demonstrated that era3 mutants overaccumulate ABA, suggesting that era3 is a negative regulator of ABA synthesis. Subsequent genetic analysis of era3 alleles, however, showed that these are new alleles at the ETHYLENE INSENSITIVE2 locus. Other mutants defective in their response to ethylene also showed altered ABA sensitivity; from these results, we conclude that ethylene appears to be a negative regulator of ABA action during germination. In contrast, the ethylene response pathway positively regulates some aspects of ABA action that involve root growth in the absence of ethylene. We discuss the response of plants to ethylene and ABA in the context of how these two hormones could influence the same growth responses.

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Ethylene Insensitivity Results in Down-Regulation of Rubisco Expression and Photosynthetic Capacity in Tobacco.
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J. Exp. Bot. 58, 1497-1503
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Plant Physiology 143, 1013-1023
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Plant Physiology 142, 1113-1126
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ABA- and ethylene-mediated responses in osmotically stressed tomato are regulated by the TSS2 and TOS1 loci.
A. Rosado, I. Amaya, V. Valpuesta, J. Cuartero, M. A. Botella, and O. Borsani (2006)
J. Exp. Bot. 57, 3327-3335
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J. Exp. Bot. 57, 2805-2814
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Plant Physiology 141, 243-256
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Plant Physiology 140, 127-139
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Plant Physiology 139, 1350-1365
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Epidermal Cell Death in Rice Is Regulated by Ethylene, Gibberellin, and Abscisic Acid.
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Plant Physiology 139, 713-721
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J. Exp. Bot. 56, 2059-2069
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J. M. Barrero, P. Piqueras, M. Gonzalez-Guzman, R. Serrano, P. L. Rodriguez, M. R. Ponce, and J. L. Micol (2005)
J. Exp. Bot. 56, 2071-2083
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Ethylene Inhibits Abscisic Acid-Induced Stomatal Closure in Arabidopsis.
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Plant Physiology 138, 2337-2343
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A WRKY Gene from Creosote Bush Encodes an Activator of the Abscisic Acid Signaling Pathway.
X. Zou, J. R. Seemann, D. Neuman, and Q. J. Shen (2004)
J. Biol. Chem. 279, 55770-55779
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H.-P. Dong, J. Peng, Z. Bao, X. Meng, J. M. Bonasera, G. Chen, S. V. Beer, and H. Dong (2004)
Plant Physiology 136, 3628-3638
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Isolation and Characterization of Novel Mutants Affecting the Abscisic Acid Sensitivity of Arabidopsis Germination and Seedling Growth.
N. Nishimura, T. Yoshida, M. Murayama, T. Asami, K. Shinozaki, and T. Hirayama (2004)
Plant Cell Physiol. 45, 1485-1499
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B. Ruggiero, H. Koiwa, Y. Manabe, T. M. Quist, G. Inan, F. Saccardo, R. J. Joly, P. M. Hasegawa, R. A. Bressan, and A. Maggio (2004)
Plant Physiology 136, 3134-3147
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Global Transcription Profiling Reveals Multiple Sugar Signal Transduction Mechanisms in Arabidopsis.
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PLANT CELL 16, 2128-2150
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The Arabidopsis thaliana ABSCISIC ACID-INSENSITIVE8 Locus Encodes a Novel Protein Mediating Abscisic Acid and Sugar Responses Essential for Growth.
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PLANT CELL 16, 406-421
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Hormone signalling from a developmental context.
B. Chow and P. McCourt (2004)
J. Exp. Bot. 55, 247-251
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Characterization of Mutants in Arabidopsis Showing Increased Sugar-Specific Gene Expression, Growth, and Developmental Responses.
M. Baier, G. Hemmann, R. Holman, F. Corke, R. Card, C. Smith, F. Rook, and M. W. Bevan (2004)
Plant Physiology 134, 81-91
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Vascularization, High-Volume Solution Flow, and Localized Roles for Enzymes of Sucrose Metabolism during Tumorigenesis by Agrobacterium tumefaciens.
R. Wachter, M. Langhans, R. Aloni, S. Gotz, A. Weilmunster, A. Koops, L. Temguia, I. Mistrik, J. Pavlovkin, U. Rascher, et al. (2003)
Plant Physiology 133, 1024-1037
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Hormones are in the air.
H. Klee (2003)
PNAS 100, 10144-10145
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Regulation of Abscisic Acid Biosynthesis.
L. Xiong and J.-K. Zhu (2003)
Plant Physiology 133, 29-36
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Three Genes That Affect Sugar Sensing (Abscisic Acid Insensitive 4, Abscisic Acid Insensitive 5, and Constitutive Triple Response 1) Are Differentially Regulated by Glucose in Arabidopsis.
A. Arroyo, F. Bossi, R. R. Finkelstein, and P. Leon (2003)
Plant Physiology 133, 231-242
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Class I Chitinase and {beta}-1,3-Glucanase Are Differentially Regulated by Wounding, Methyl Jasmonate, Ethylene, and Gibberellin in Tomato Seeds and Leaves.
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Plant Physiology 133, 263-273
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Overproduction of Cytokinins in Petunia Flowers Transformed with PSAG12-IPT Delays Corolla Senescence and Decreases Sensitivity to Ethylene.
H. Chang, M. L. Jones, G. M. Banowetz, and D. G. Clark (2003)
Plant Physiology 132, 2174-2183
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Mechanisms of Glucose Signaling during Germination of Arabidopsis.
J. Price, T.-C. Li, S. G. Kang, J. K. Na, and J.-C. Jang (2003)
Plant Physiology 132, 1424-1438
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Viviparous1 Alters Global Gene Expression Patterns through Regulation of Abscisic Acid Signaling.
M. Suzuki, M. G. Ketterling, Q.-B. Li, and D. R. McCarty (2003)
Plant Physiology 132, 1664-1677
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Ethylene Modulates Root-Wave Responses in Arabidopsis.
C. S. Buer, G. O. Wasteneys, and J. Masle (2003)
Plant Physiology 132, 1085-1096
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Cross-talk in Plant Hormone Signalling: What Arabidopsis Mutants Are Telling Us.
Ann. Bot. 91, 605-612
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