Cross-Talk Between Phytohormone Signaling Pathways Under Both Optimal and Stressful Environmental Conditions

Chapter

Abstract

The perception of abiotic stress triggers the activation of signal transduction cascades that interact with the baseline pathways transduced by phytohormones. The convergence points among hormone signal transduction cascades are considered cross-talk, and together they form a signaling network. Through this mechanism, hormones interact by activating either a common second messenger or a phosphorylation cascade. This chapter reviews kinase cascades as cross-talk points in hormonal networks during abiotic stress conditions. These transduction cascades lead to the regulation of gene expression that directly affects the biosynthesis or action of other hormones. Examples of stress-related hormone transduction networks are provided for drought and wounding conditions. The expression of specific genes associated with drought and wounding stress will be compared with expression changes that occur during other abiotic stress conditions. This evaluation will be used to construct a model of abiotic stress signaling that incorporates the signaling components that are most common across all abiotic stress conditions and are, therefore, relevant to developing stress tolerance in crop plants.

Keywords

Nitric Oxide Drought Stress Guard Cell Ethylene Production Jasmonic Acid 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Abbreviations

ABA

Abscisic acid

ABF

ABA-responsive element-binding factor

ABI

ABA insensitive

ABRE

ABA-responsive element

ACO

1-Aminocyclopropane-1-carboxylate oxidase

ACS

1-Aminocyclopropane-1-carboxylic acid synthase

AGO1

Argonaute1

AP2C1

Arabidopsis Ser/Thr phosphatase of type 2C

AtHK1

Arabidopsis histidine kinase 1

CDPK

Calcium-dependent protein kinase

CKX

Cytokinin oxidase/dehydrogenase

CPK

Calcium-dependent protein kinase gene/protein abbreviation

EIN3

Ethylene insensitive

EREBP

Ethylene-responsive element-binding protein

ERF

Ethylene-response factor

GORK

Guard cell outward-rectifying K+

GST

Glutathione-S-transferase 1

GUS

β-glucuronidase

HK

Histidine kinase

IP3

Inositol trisphosphate

JA

Jasmonic acid

KAT

K+ channel in Arabidopsis thaliana

MAPK

Mitogen-activated protein kinase

MeJA

Methyl JA

miRNA

MicroRNA

MKK

MAPK kinase

MPK

MAPK gene/protein abbreviation

NO

Nitric oxide

OPR3

12-oxophytodienoat-10,11-reductase

PP2C

Protein phosphatase 2C

PYR

Pyrabactin (4-bromo-N-[pyridin-2-yl methyl] naphthalene-1-sulfonamide) resistance

RCAR

Regulatory component of ABA receptor

ROS

Reactive oxygen species

RSRE

Rapid stress response element

RWR

Rapid wound response

SEN1

Senescence-associated protein 1

SLAC1

Slow anion channel-associated 1

SnRK2

Sucrose nonfermenting 1-related protein kinase

TCH3

Touch-induced 3

Notes

Acknowledgments

I thank Susan Weinstein for her careful reading and helpful advice concerning this manuscript. I also thank Jamie Lau for assistance with the graphics and Richard Pitaniello for editing assistance.

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© Springer Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Department of Biological SciencesMarshall UniversityHuntingtonUSA

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