Signal crosstalk in plant stress responses /

Table Of Contents:
Contributors ix
Preface xiii
1 Role of Abscisic Acid in Disease Resistance 1

VICTOR FLORS, JURRIAAN TON, AND BRIGITTE MAUCH-MANI

Introduction 1

ABA Decreases Disease Resistance 1

ABA Increases Disease Resistance 5

Crosstalk with Other Phytohormones 10

Interactions between Biotic and Abiotic Stress Regulation 15

Prospects and Conclusions 17

Acknowledgments 17
2 Plant Mitogen-Activated Protein Kinase Cascades in Signaling Crosstalk 23

FUMINORI TAKAHASHI, KAZUYA ICHIMURA, KAZUO SHINOZAKI, AND KEN SHIRASU

Introduction 23

MAPK Cascade Components 24

MPK3 and MPK6: Promiscuous MAPKs or Crosstalk Junction? 25

ANP1 as Upstream MAPKKK of MPK3 and MPK6 30

MPK3 and MPK6 in Ethylene Biosynthesis and Signal Transduction 30

MEKK1-MKK1/MKK2-MPK4 Pathway in Biotic and Abiotic Stress 31

Arabidopsis MKK3-MPK6 Pathway in JA Signaling 34

Arabidopsis MKK3 and the Group C MPKs (MPK1, MPK2, MPK7, and MPK14) in Wounding and Pathogen Infection 34

Tobacco NPK1-NtMEK1-NTF6 Cascade in Cell Plate Formation and Defense Responses 35

Protein Phosphatases Negatively Regulate MAPK Cascades 36

Conclusions 37

Acknowledgment 38
3 Transcription Factors Involved in the Crosstalk between Abiotic and Biotic Stress-Signaling Networks 43

YASUNARI FUJITA, MIKI FUJITA, KAZUKO YAMAGUCHI-SHINOZAKI, AND KAZUO SHINOZAKI

Introduction 43

Zinc Finger Transcription Factors in ROS Signaling 43

MYC and MYB Transcription Factors in JA and ABA Signaling Pathways 45

NAC Transcription Factors in ABA, JA, and Senescence Signaling Pathways 47

ERF/AP2 Family Transcription Factors 48

Transcription Factors Involved in the Biosynthesis and Regulation of Cuticular Components 51

Conclusions 53
4 Crosstalk in Ca虏+ Signaling Pathways 59

MARTIN R. McAINSH AND JULIAN I. SCHROEDER

Introduction 59

Ca虏+ Signals in Abiotic and Biotic Stress Responses 60

Generation of Ca虏+ Signals 66

Specificity in Ca虏+ Signaling 74

Decoding Ca虏+ Signals 79

Conclusions 83
5 Crosstalk in Pathogen and Hormonal Regulation of Guard Cell Signaling 96

ELENA BRAY SPETH, MAELI MELOTTO, WEI ZHANG, SARAH M. ASSMANN, AND SHENG YANG HE

Introduction 96

Hormonal Regulation of Stomatal Movements 97

Are ROS and NO Common Integrators of Hormonal Regulation of Stomatal Aperture? 101

Pathogen Regulation of Stomatal Movements 102

Concluding Remarks 107

Acknowledgments 107
6 Environmental Sensitivity in Pathogen Resistant Arabidopsis Mutants 113

WOLFGANG MOEDER AND KEIKO YOSHIOKA

Introduction 113

Environmental Effects on R Gene-Mediated Pathogen Resistance 114

Lesion Mimic Mutants and Their Environmental Sensitivity 116

What Are the Common Aspects in the Described Examples? 121

Possible Mechanisms for Environmental Sensitivity 122

Concluding Remarks 128

Acknowledgments 130
7 Reactive Oxygen Species, Nitric Oxide, and Signal Crosstalk 136

STEVEN J. NEILL, JOHN T. HANCOCK, AND IAN D. WILSON

Introduction 136

Synthesis, Turnovo, and Interactions of ROS and NO 141

RS and Signal Crosstalk 151

Conclusions 156
8 TORing with Cell Cycle, Nutrients, Stress, and Growth 161

DESH PAL S. VERMA AND JAYANTA CHATTERJEE

Introduction 161

Conservation of TOR Pathway in Eukaryotes 161

Presence of TOR Pathway in Plants and Caveat of Plant Resistance against Rapamycin 162

Major Players of TOR Pathway in Plants 164

TOR Connections with Plant Cell Cycle and Growth 176

Plant Viral Infections and Possible TOR Connections 179

Nutrient Sensing via TOR 180

Osmotic Stress Signaling and TOR 186

Conclusion 188

Acknowledgment 190
Index 201