title: Determinants of timing and amplitude in the plant general stress response.
abstract: Plants have evolved intricate signaling cascades to rapidly and effectively respond to biotic and abiotic challenges. The precise timing of these responses enables optimal resource reallocation to maintain the balance between stress adaptation and growth. Thus, an in-depth understanding of the immediate and long-term mechanisms regulating resource allocation is critical in deciphering how plants withstand environmental challenges. To date however, understanding of this tradeoff has focused on the amplitude of long-term responses, rather than the timing of rapid stress responses. This review presents current knowledge on kinetics of secondary messengers involved in regulation of rapid and general stress responses, followed by rapid stress responsive transduction machinery, and finally the transcriptional response of a functional general stress responsive cis-element. Within this context we discuss the role of timing of initial peak activation and later oscillating peak responses, and explore hormonal and stress signaling crosstalk confounding greater understanding of these cascades.
authors.affiliation: Department of Plant Sciences, University of California, Davis, CA 95616, USA.|Department of Plant Biology, University of California, Davis, CA 95616, USA.
authors.forename: Marta
authors.initials: M
authors.lastname: Bjornson
authors.affiliation: Department of Plant Sciences, University of California, Davis, CA 95616, USA.
authors.forename: Abhaya
authors.initials: A
authors.lastname: Dandekar
authors.affiliation: Department of Plant Biology, University of California, Davis, CA 95616, USA.
authors.forename: Katayoon
authors.initials: K
authors.lastname: Dehesh
mesh_terms: D008954:Models, Biological; D010937:Plant Growth Regulators / Q000378:metabolism; D010944:Plants / Q000235:genetics / Q000378:metabolism*; D015398:Signal Transduction; D013312:Stress, Physiological; D013997:Time Factors
chemical_list: D010937:Plant Growth Regulators
keywords: Calcium; general stress response; mitogen-activated protein kinase; nitric oxide; rapid stress response element; reactive oxygen species; timing