Work

Jasmonic Acid Signaling Modulates Ozone-Induced Hypersensitive Cell Death

Year: 2000

Type: article

Abstract: Recent studies suggest that cross-talk between salicylic acid (SA)-, jasmonic acid (JA)-, and ethylene-dependent signaling pathways regulates plant responses to both abiotic and biotic stress factors. Earlier studies demonstrated that ozone (O(3)) exposure activates a hypersensitive response (HR)-like cell death pathway in the Arabidopsis ecotype Cvi-0. We now have confirmed the role of SA and JA signaling in influencing O(3)-induced cell death. Expression of salicylate hydroxylase (NahG) in Cvi-0 reduced O(3)-induced cell death. Methyl jasmonate (Me-JA) pretreatment of Cvi-0 decreased O(3)-induced H(2)O(2) content and SA concentrations and completely abolished O(3)-induced cell death. Cvi-0 synthesized as much JA as did Col-0 in response to O(3) exposure but exhibited much less sensitivity to exogenous Me-JA. Analyses of the responses to O(3) of the JA-signaling mutants jar1 and fad3/7/8 also demonstrated an antagonistic relationship between JA- and SA-signaling pathways in controlling the magnitude of O(3)-induced HR-like cell death.

Source: The Plant Cell

DOI: 10.2307/3871179

Authors: Mulpuri V. Rao, Hyung-il Lee, Robert A. Creelman, John E. Mullet, Keith R. Davis

Institutions: The Ohio State University, Rutgers, The State University of New Jersey, Texas A&M University

Language: English

Topic: Plant Stress Responses and Tolerance

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: green

Funders: Ohio State University, Washington State University, University of East Anglia

OpenAlex ID: W2133760292

FWCI: 37.06

Cites: 56

Cited by: 491

Related to: 8