Annual Plant Reviews, Volume 44, The Plant Hormone Ethylene (eBook, ePUB)
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Annual Plant Reviews, Volume 44, The Plant Hormone Ethylene (eBook, ePUB)
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The plant hormone ethylene is one of the most important, being one of the first chemicals to be determined as a naturally-occurring growth regulator and influencer of plant development. It was also the first hormone for which significant evidence was found for the presence of receptors. This important new volume in Annual Plant Reviews is broadly divided into three parts. The first part covers the biosynthesis of ethylene and includes chapters on S-adenosylmethionine and the formation and fate of ACC in plant cells. The second part of the volume covers ethylene signaling, including the…mehr
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- Produktdetails
- Verlag: John Wiley & Sons
- Seitenzahl: 456
- Erscheinungstermin: 8. Februar 2012
- Englisch
- ISBN-13: 9781118223116
- Artikelnr.: 38236553
- Verlag: John Wiley & Sons
- Seitenzahl: 456
- Erscheinungstermin: 8. Februar 2012
- Englisch
- ISBN-13: 9781118223116
- Artikelnr.: 38236553
urstenbinder and Margret Sauter 2.1 Introduction 20 2.2 The metabolism of Met and SAM 22 2.3 Regulation of de novo Met synthesis 25 2.4 Regulation of the SAM pool 27 2.4.1 Regulation of SAMS genes by ethylene and of SAMS enzyme activity by protein-S-nitrosylation 29 2.5 The activated methyl cycle 30 2.6 The S-methylmethionine cycle 32 2.7 The methionine or Yang cycle 35 2.7.1 The Yang cycle in relation to polyamine and nicotianamine biosynthesis 39 2.7.2 Regulation of the Yang cycle in relation to ethylene synthesis 40 2.8 Conclusions 42 Acknowledgement 43 References 44 3 The Formation of ACC and Competition Between Polyamines and Ethylene for SAM 53 Smadar Harpaz-Saad, Gyeong Mee Yoon, Autar K. Mattoo, and Joseph J. Kieber 3.1 Introduction 53 3.2 Identification and characterization of ACC synthase activity in plants 54 3.2.1 Historical overview 54 3.2.2 Purification and properties of the ACC synthase protein 56 3.3 Analysis of ACC synthase at the transcriptional level 58 3.3.1 Molecular cloning of ACC synthase genes 58 3.3.2 Transcriptional regulation of the ACC synthase gene family 59 3.4 Post-transcriptional regulation of ACS 62 3.4.1 Identification and characterization of interactions with ETO1 62 3.4.2 Regulation of ACS degradation 64 3.5 Does ACC act as a signal? 65 3.6 Biosynthesis and physiology of polyamines 67 3.6.1 SAM is a substrate for polyamines 67 3.6.2 Physiology of polyamine effects in vitro and in vivo 67 3.6.3 Concurrent biosynthesis of ethylene and polyamines 70 3.6.4 Do plant cells invoke a homeostatic regulation of SAM levels? 72 Acknowledgements 72 References 72 4 The Fate of ACC in Higher Plants 83 Sarah J. Dorling and Michael T. McManus 4.1 Introduction 83 4.2 History of the discovery of ACC oxidase as the ethylene-forming enzyme 84 4.2.1 Early characterization of ACC oxidase 84 4.2.2 Cloning of the ethylene-forming enzyme as an indicator of enzyme activity 85 4.2.3 Initial biochemical demonstration of ethylene-forming enzyme activity in vitro 86 4.3 Mechanism of the ACC oxidase-catalyzed reaction 86 4.3.1 Investigation of the ACO reaction mechanism 87 4.3.2 Metabolism of HCN 89 4.3.3 Evidence of the conjugation of ACC 91 4.4 Transcriptional regulation of ACC oxidase 92 4.4.1 ACO multi-gene families 92 4.4.2 Differential expression of members of ACO multi-gene families in response to developmental and environmental stimuli 94 4.4.3 Transcriptional regulation of ACO gene expression 96 4.4.4 Crosstalk between ethylene signalling elements and ACO gene expression 97 4.5 Translational regulation of ACC oxidase 97 4.6 Evidence that ACC oxidase acts as a control point in ethylene biosynthesis 100 4.6.1 Cell-specific expression of ACC oxidase 102 4.6.2 Differential expression of ACS and ACO genes 103 4.7 Evolutionary aspects of ACC oxidase 104 Acknowledgements 105 References 105 5 Perception of Ethylene by Plants - Ethylene Receptors 117 Brad M. Binder, Caren Chang and G. Eric Schaller 5.1 Historical overview 118 5.2 Subfamilies of ethylene receptors and their evolutionary history 120 5.3 Ethylene binding 123 5.3.1 Requirements for a metal cofactor 123 5.3.2 Characterization of the ethylene-binding pocket and signal transduction 124 5.4 Signal output from the receptors 126 5.5 Overlapping and non-overlapping roles for the receptor isoforms in controlling various phenotypes 128 5.6 Post-translational regulation of the receptors 131 5.6.1 Clustering of receptors 131 5.6.2 Ethylene-mediated degradation of receptors 132 5.6.3 Regulatory role of REVERSION-TO-ETHYLENE SENSITIVITY1 (RTE1)/GREEN-RIPE (GR) 133 5.6.4 Other proteins that interact with the ethylene receptors 134 5.7 Conclusions and model 135 Acknowledgements 137 References 138 6 Ethylene Signalling: the CTR1 Protein Kinase 147 Silin Zhong and Caren Chang 6.1 Introduction 148 6.2 Discovery of CTR1, a negative regulator of ethylene signal transduction 148 6.2.1 Isolation of the Arabidopsis CTR1 mutant 148 6.2.2 CTR1 mutant phenotypes in Arabidopsis 149 6.2.3 Placement of CTR1 in the ethylene-response pathway 150 6.3 CTR1 Encodes a serine/threonine protein kinase 151 6.3.1 Molecular cloning and sequence analysis of the Arabidopsis CTR1 gene 151 6.3.2 CTR1 biochemical activity 152 6.4 The CTR1 gene family 153 6.4.1 The CTR multi-gene family in tomato 153 6.4.2 Functional roles of tomato CTR genes 153 6.4.3 Transcriptional regulation of CTR-like genes 155 6.5 Regulation of CTR1 activity 156 6.5.1 Physical association of CTR1 with ethylene receptors 158 6.5.2 Membrane localization of CTR1 159 6.5.3 An inhibitory role for the CTR1 N-terminus? 159 6.5.4 Other factors that potentially interact with and regulate CTR1 activity 160 6.6 Elusive targets of CTR1 signalling 161 6.7 CTR1 crosstalk and interactions with other signals 162 6.8 Conclusions 163 Acknowledgements 164 References 164 7 EIN2 and EIN3 in Ethylene Signalling 169 Young-Hee Cho, Sangho Lee and Sang-Dong Yoo 7.1 Introduction 169 7.2 Overview of ethylene signalling and EIN2 and EIN3 172 7.3 Genetic identification and biochemical regulation of EIN2 173 7.4 EIN3 regulation in ethylene signalling 174 7.4.1 Genetic identification and biochemical regulation of EIN3 174 7.4.2 Structural and functional analysis of ein3 function 178 7.4.3 Function of EIN3 as transcription activator 180 7.5 Functions of ERF1 and other ERFs in ethylene signalling 181 7.6 Future directions 183 Acknowledgements 184 References 184 8 Ethylene in Seed Development, Dormancy and Germination 189 Renata Bogatek and Agnieszka Gniazdowska 8.1 Introduction 189 8.2 Ethylene in seed embryogenesis 192 8.2.1 Ethylene biosynthesis during zygotic embryogenesis 192 8.2.2 Ethylene involvement in the regulation of seed morphology 194 8.3 Ethylene in seed dormancy and germination 194 8.3.1 Ethylene biosynthesis during dormancy release and germination 194 8.3.2 The role of ethylene in seed heterogeneity 199 8.4 Ethylene interactions with other plant hormones in the regulation of seed dormancy and germination 199 8.5 Ethylene interactions with ROS in the regulation of seed dormancy and germination 202 8.6 Ethylene interactions with other small gaseous signalling molecules (NO, HCN) in the regulation of seed dormancy and germination 204 8.7 Concluding remarks 207 Acknowledgements 209 References 209 9 The Role of Ethylene in Plant Growth and Development 219 Filip Vandenbussche and Dominique Van Der Straeten 9.1 Introduction 219 9.2 Design of root architecture 220 9.3 Regulation of hypocotyl growth 225 9.4 Shoot architecture and orientation: post-seedling growth 229 9.4.1 Inhibition of growth by ethylene 229 9.4.2 Stimulation of growth by ethylene 229 9.4.3 Shoot gravitropism 231 9.4.4 Control of stomatal density and aperture 231 9.4.5 Activity of the shoot apical meristem 231 9.5 Floral transition 232 9.6 Determination of sexual forms of flowers 232 9.7 Ethylene effects on growth controlling mechanisms 233 9.8 Conclusions 234 Acknowledgements 234 References 234 10 Ethylene and Cell Separation Processes 243 Zinnia H. Gonzalez-Carranza and Jeremy A. Roberts 10.1 Introduction 243 10.2 Overview of the cell separation process 244 10.2.1 Abscission 245 10.2.2 Dehiscence 249 10.2.3 Aerenchyma formation 251 10.2.4 Stomata development and hydathode formation 252 10.2.5 Root cap cell sloughing and lateral root emergence 254 10.2.6 Xylem differentiation 257 10.3 Transcription analyses during cell separation 258 10.4 Relationship between ethylene and other hormones in the regulation of cell separation 259 10.4.1 Ethyene and IAA 259 10.4.2 Ethylene and jasmonic acid 260 10.4.3 Ethylene and abscisic acid 261 10.5 Ethylene and signalling systems during cell separation 261 10.5.1 Role of IDA, IDA-like, HAESA and HAESA-like genes 261 10.5.2 MAP kinases 262 10.5.3 Nevershed 262 10.6 Application of knowledge of abscission to crops of horticultural and agricultural importance 262 10.7 Conclusions and future perspectives 263 References 265 11 Ethylene and Fruit Ripening 275 Jean-Claude Pech, Eduardo Purgatto, Mondher Bouzayen and Alain Latch
e 11.1 Introduction 276 11.2 Regulation of ethylene production during ripening of climacteric fruit 276 11.2.1 Regulation of ethylene biosynthesis genes during the System 1 to System 2 transition 277 11.2.2 ACS gene alleles are major determinants of ethylene biosynthesis and shelf-life of climacteric fruit 280 11.2.3 Genetic determinism of the climacteric character 281 11.3 Transcriptional control of ethylene biosynthesis genes 282 11.4 Role of ethylene in ripening of non-climacteric fruit 283 11.5 Manipulation of ethylene biosynthesis and ripening 284 11.6 Ethylene-dependent and -independent aspects of climacteric ripening 286 11.7 Ethylene perception and transduction effects in fruit ripening 288 11.7.1 Ethylene perception 288 11.7.2 Chemical control of the post-harvest ethylene response in fruit ripening 289 11.7.3 Ethylene signal transduction 290 11.7.4 The transcriptional cascade leading to the regulation of ethylene-responsive and ripening-related genes 291 11.8 Hormonal crosstalk in fruit ripening 292 11.8.1 Ethylene and abscisic acid 293 11.8.2 Ethylene and jasmonate 293 11.8.3 Ethylene and auxin 294 11.8.4 Ethylene and the gibberellins 295 11.9 Conclusions and future directions 295 Acknowledgements 296 References 296 12 Ethylene and Senescence Processes 305 Laura E. Graham, Jos H.M. Schippers, Paul P. Dijkwel and Carol Wagstaff 12.1 Introduction 306 12.2 Overview of ethylene-mediated senescence in different plant organs 306 12.2.1 Leaf senescence 306 12.2.2 Pod senescence 310 12.2.3 Petal senescence 312 12.3 Transcriptional regulation of ethylene-mediated senescence processes 314 12.3.1 Global regulation 314 12.3.2 Transcription factors and signalling pathways 315 12.4 Interaction of ethylene with other hormones in relation to senescence 323 12.5 The importance of ethylene-mediated senescence in post-harvest biology 325 12.5.1 Post-harvest factors affected by ethylene 325 12.5.2 Ways of controlling ethylene-related post-harvest losses 327 12.5.2.1 Packaging 327 12.5.2.2 1-Methylcyclopropene 328 12.6 Conclusions and future perspectives 329 References 329 13 Ethylene: Multi-Tasker in Plant-Attacker Interactions 343 Sjoerd Van der Ent and Corn
e M.J. Pieterse 13.1 Introduction 344 13.2 Hormones in plant defence signalling 346 13.2.1 Hormones as defence regulators 346 13.2.2 Salicylic acid 347 13.2.3 Jasmonic acid 347 13.2.4 Ethylene 348 13.3 Implications of ethylene in basal defence and disease susceptibility 348 13.3.1 Studies with Arabidopsis thaliana 348 13.3.2 Studies with tobacco 350 13.3.3 Studies with tomato 351 13.3.4 Studies with soybean 352 13.3.5 Other plant species 352 13.4 Implications of ethylene in systemic immune responses 353 13.4.1 Systemic induced immunity 353 13.4.2 Rhizobacteria-mediated ISR 354 13.4.3 Genetic dissection of the ISR pathway in Arabidopsis 356 13.4.4 Priming for enhanced JA/ethylene-dependent defences 358 13.4.5 Molecular mechanisms of priming for enhanced defence 360 13.4.6 Costs and benefits of priming for enhanced defence 362 13.5 Ethylene modulates crosstalk among defence-signalling pathways 362 13.5.1 Crosstalk in defence signalling 362 13.5.2 Interplay among SA, JA and ethylene signalling 363 13.5.3 Ethylene: an important modulator of defence-signalling pathways 365 13.6 Concluding remarks 365 Acknowledgements 366 References 367 Index 379 First 8-page color plate section (between pages 168 and 169) Second 8-page color plate section (between pages 360 and 361)
urstenbinder and Margret Sauter 2.1 Introduction 20 2.2 The metabolism of Met and SAM 22 2.3 Regulation of de novo Met synthesis 25 2.4 Regulation of the SAM pool 27 2.4.1 Regulation of SAMS genes by ethylene and of SAMS enzyme activity by protein-S-nitrosylation 29 2.5 The activated methyl cycle 30 2.6 The S-methylmethionine cycle 32 2.7 The methionine or Yang cycle 35 2.7.1 The Yang cycle in relation to polyamine and nicotianamine biosynthesis 39 2.7.2 Regulation of the Yang cycle in relation to ethylene synthesis 40 2.8 Conclusions 42 Acknowledgement 43 References 44 3 The Formation of ACC and Competition Between Polyamines and Ethylene for SAM 53 Smadar Harpaz-Saad, Gyeong Mee Yoon, Autar K. Mattoo, and Joseph J. Kieber 3.1 Introduction 53 3.2 Identification and characterization of ACC synthase activity in plants 54 3.2.1 Historical overview 54 3.2.2 Purification and properties of the ACC synthase protein 56 3.3 Analysis of ACC synthase at the transcriptional level 58 3.3.1 Molecular cloning of ACC synthase genes 58 3.3.2 Transcriptional regulation of the ACC synthase gene family 59 3.4 Post-transcriptional regulation of ACS 62 3.4.1 Identification and characterization of interactions with ETO1 62 3.4.2 Regulation of ACS degradation 64 3.5 Does ACC act as a signal? 65 3.6 Biosynthesis and physiology of polyamines 67 3.6.1 SAM is a substrate for polyamines 67 3.6.2 Physiology of polyamine effects in vitro and in vivo 67 3.6.3 Concurrent biosynthesis of ethylene and polyamines 70 3.6.4 Do plant cells invoke a homeostatic regulation of SAM levels? 72 Acknowledgements 72 References 72 4 The Fate of ACC in Higher Plants 83 Sarah J. Dorling and Michael T. McManus 4.1 Introduction 83 4.2 History of the discovery of ACC oxidase as the ethylene-forming enzyme 84 4.2.1 Early characterization of ACC oxidase 84 4.2.2 Cloning of the ethylene-forming enzyme as an indicator of enzyme activity 85 4.2.3 Initial biochemical demonstration of ethylene-forming enzyme activity in vitro 86 4.3 Mechanism of the ACC oxidase-catalyzed reaction 86 4.3.1 Investigation of the ACO reaction mechanism 87 4.3.2 Metabolism of HCN 89 4.3.3 Evidence of the conjugation of ACC 91 4.4 Transcriptional regulation of ACC oxidase 92 4.4.1 ACO multi-gene families 92 4.4.2 Differential expression of members of ACO multi-gene families in response to developmental and environmental stimuli 94 4.4.3 Transcriptional regulation of ACO gene expression 96 4.4.4 Crosstalk between ethylene signalling elements and ACO gene expression 97 4.5 Translational regulation of ACC oxidase 97 4.6 Evidence that ACC oxidase acts as a control point in ethylene biosynthesis 100 4.6.1 Cell-specific expression of ACC oxidase 102 4.6.2 Differential expression of ACS and ACO genes 103 4.7 Evolutionary aspects of ACC oxidase 104 Acknowledgements 105 References 105 5 Perception of Ethylene by Plants - Ethylene Receptors 117 Brad M. Binder, Caren Chang and G. Eric Schaller 5.1 Historical overview 118 5.2 Subfamilies of ethylene receptors and their evolutionary history 120 5.3 Ethylene binding 123 5.3.1 Requirements for a metal cofactor 123 5.3.2 Characterization of the ethylene-binding pocket and signal transduction 124 5.4 Signal output from the receptors 126 5.5 Overlapping and non-overlapping roles for the receptor isoforms in controlling various phenotypes 128 5.6 Post-translational regulation of the receptors 131 5.6.1 Clustering of receptors 131 5.6.2 Ethylene-mediated degradation of receptors 132 5.6.3 Regulatory role of REVERSION-TO-ETHYLENE SENSITIVITY1 (RTE1)/GREEN-RIPE (GR) 133 5.6.4 Other proteins that interact with the ethylene receptors 134 5.7 Conclusions and model 135 Acknowledgements 137 References 138 6 Ethylene Signalling: the CTR1 Protein Kinase 147 Silin Zhong and Caren Chang 6.1 Introduction 148 6.2 Discovery of CTR1, a negative regulator of ethylene signal transduction 148 6.2.1 Isolation of the Arabidopsis CTR1 mutant 148 6.2.2 CTR1 mutant phenotypes in Arabidopsis 149 6.2.3 Placement of CTR1 in the ethylene-response pathway 150 6.3 CTR1 Encodes a serine/threonine protein kinase 151 6.3.1 Molecular cloning and sequence analysis of the Arabidopsis CTR1 gene 151 6.3.2 CTR1 biochemical activity 152 6.4 The CTR1 gene family 153 6.4.1 The CTR multi-gene family in tomato 153 6.4.2 Functional roles of tomato CTR genes 153 6.4.3 Transcriptional regulation of CTR-like genes 155 6.5 Regulation of CTR1 activity 156 6.5.1 Physical association of CTR1 with ethylene receptors 158 6.5.2 Membrane localization of CTR1 159 6.5.3 An inhibitory role for the CTR1 N-terminus? 159 6.5.4 Other factors that potentially interact with and regulate CTR1 activity 160 6.6 Elusive targets of CTR1 signalling 161 6.7 CTR1 crosstalk and interactions with other signals 162 6.8 Conclusions 163 Acknowledgements 164 References 164 7 EIN2 and EIN3 in Ethylene Signalling 169 Young-Hee Cho, Sangho Lee and Sang-Dong Yoo 7.1 Introduction 169 7.2 Overview of ethylene signalling and EIN2 and EIN3 172 7.3 Genetic identification and biochemical regulation of EIN2 173 7.4 EIN3 regulation in ethylene signalling 174 7.4.1 Genetic identification and biochemical regulation of EIN3 174 7.4.2 Structural and functional analysis of ein3 function 178 7.4.3 Function of EIN3 as transcription activator 180 7.5 Functions of ERF1 and other ERFs in ethylene signalling 181 7.6 Future directions 183 Acknowledgements 184 References 184 8 Ethylene in Seed Development, Dormancy and Germination 189 Renata Bogatek and Agnieszka Gniazdowska 8.1 Introduction 189 8.2 Ethylene in seed embryogenesis 192 8.2.1 Ethylene biosynthesis during zygotic embryogenesis 192 8.2.2 Ethylene involvement in the regulation of seed morphology 194 8.3 Ethylene in seed dormancy and germination 194 8.3.1 Ethylene biosynthesis during dormancy release and germination 194 8.3.2 The role of ethylene in seed heterogeneity 199 8.4 Ethylene interactions with other plant hormones in the regulation of seed dormancy and germination 199 8.5 Ethylene interactions with ROS in the regulation of seed dormancy and germination 202 8.6 Ethylene interactions with other small gaseous signalling molecules (NO, HCN) in the regulation of seed dormancy and germination 204 8.7 Concluding remarks 207 Acknowledgements 209 References 209 9 The Role of Ethylene in Plant Growth and Development 219 Filip Vandenbussche and Dominique Van Der Straeten 9.1 Introduction 219 9.2 Design of root architecture 220 9.3 Regulation of hypocotyl growth 225 9.4 Shoot architecture and orientation: post-seedling growth 229 9.4.1 Inhibition of growth by ethylene 229 9.4.2 Stimulation of growth by ethylene 229 9.4.3 Shoot gravitropism 231 9.4.4 Control of stomatal density and aperture 231 9.4.5 Activity of the shoot apical meristem 231 9.5 Floral transition 232 9.6 Determination of sexual forms of flowers 232 9.7 Ethylene effects on growth controlling mechanisms 233 9.8 Conclusions 234 Acknowledgements 234 References 234 10 Ethylene and Cell Separation Processes 243 Zinnia H. Gonzalez-Carranza and Jeremy A. Roberts 10.1 Introduction 243 10.2 Overview of the cell separation process 244 10.2.1 Abscission 245 10.2.2 Dehiscence 249 10.2.3 Aerenchyma formation 251 10.2.4 Stomata development and hydathode formation 252 10.2.5 Root cap cell sloughing and lateral root emergence 254 10.2.6 Xylem differentiation 257 10.3 Transcription analyses during cell separation 258 10.4 Relationship between ethylene and other hormones in the regulation of cell separation 259 10.4.1 Ethyene and IAA 259 10.4.2 Ethylene and jasmonic acid 260 10.4.3 Ethylene and abscisic acid 261 10.5 Ethylene and signalling systems during cell separation 261 10.5.1 Role of IDA, IDA-like, HAESA and HAESA-like genes 261 10.5.2 MAP kinases 262 10.5.3 Nevershed 262 10.6 Application of knowledge of abscission to crops of horticultural and agricultural importance 262 10.7 Conclusions and future perspectives 263 References 265 11 Ethylene and Fruit Ripening 275 Jean-Claude Pech, Eduardo Purgatto, Mondher Bouzayen and Alain Latch
e 11.1 Introduction 276 11.2 Regulation of ethylene production during ripening of climacteric fruit 276 11.2.1 Regulation of ethylene biosynthesis genes during the System 1 to System 2 transition 277 11.2.2 ACS gene alleles are major determinants of ethylene biosynthesis and shelf-life of climacteric fruit 280 11.2.3 Genetic determinism of the climacteric character 281 11.3 Transcriptional control of ethylene biosynthesis genes 282 11.4 Role of ethylene in ripening of non-climacteric fruit 283 11.5 Manipulation of ethylene biosynthesis and ripening 284 11.6 Ethylene-dependent and -independent aspects of climacteric ripening 286 11.7 Ethylene perception and transduction effects in fruit ripening 288 11.7.1 Ethylene perception 288 11.7.2 Chemical control of the post-harvest ethylene response in fruit ripening 289 11.7.3 Ethylene signal transduction 290 11.7.4 The transcriptional cascade leading to the regulation of ethylene-responsive and ripening-related genes 291 11.8 Hormonal crosstalk in fruit ripening 292 11.8.1 Ethylene and abscisic acid 293 11.8.2 Ethylene and jasmonate 293 11.8.3 Ethylene and auxin 294 11.8.4 Ethylene and the gibberellins 295 11.9 Conclusions and future directions 295 Acknowledgements 296 References 296 12 Ethylene and Senescence Processes 305 Laura E. Graham, Jos H.M. Schippers, Paul P. Dijkwel and Carol Wagstaff 12.1 Introduction 306 12.2 Overview of ethylene-mediated senescence in different plant organs 306 12.2.1 Leaf senescence 306 12.2.2 Pod senescence 310 12.2.3 Petal senescence 312 12.3 Transcriptional regulation of ethylene-mediated senescence processes 314 12.3.1 Global regulation 314 12.3.2 Transcription factors and signalling pathways 315 12.4 Interaction of ethylene with other hormones in relation to senescence 323 12.5 The importance of ethylene-mediated senescence in post-harvest biology 325 12.5.1 Post-harvest factors affected by ethylene 325 12.5.2 Ways of controlling ethylene-related post-harvest losses 327 12.5.2.1 Packaging 327 12.5.2.2 1-Methylcyclopropene 328 12.6 Conclusions and future perspectives 329 References 329 13 Ethylene: Multi-Tasker in Plant-Attacker Interactions 343 Sjoerd Van der Ent and Corn
e M.J. Pieterse 13.1 Introduction 344 13.2 Hormones in plant defence signalling 346 13.2.1 Hormones as defence regulators 346 13.2.2 Salicylic acid 347 13.2.3 Jasmonic acid 347 13.2.4 Ethylene 348 13.3 Implications of ethylene in basal defence and disease susceptibility 348 13.3.1 Studies with Arabidopsis thaliana 348 13.3.2 Studies with tobacco 350 13.3.3 Studies with tomato 351 13.3.4 Studies with soybean 352 13.3.5 Other plant species 352 13.4 Implications of ethylene in systemic immune responses 353 13.4.1 Systemic induced immunity 353 13.4.2 Rhizobacteria-mediated ISR 354 13.4.3 Genetic dissection of the ISR pathway in Arabidopsis 356 13.4.4 Priming for enhanced JA/ethylene-dependent defences 358 13.4.5 Molecular mechanisms of priming for enhanced defence 360 13.4.6 Costs and benefits of priming for enhanced defence 362 13.5 Ethylene modulates crosstalk among defence-signalling pathways 362 13.5.1 Crosstalk in defence signalling 362 13.5.2 Interplay among SA, JA and ethylene signalling 363 13.5.3 Ethylene: an important modulator of defence-signalling pathways 365 13.6 Concluding remarks 365 Acknowledgements 366 References 367 Index 379 First 8-page color plate section (between pages 168 and 169) Second 8-page color plate section (between pages 360 and 361)