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Arabidopsis ethylene receptors have different roles in Fumonisin B1-induced cell death

Authors:	Jonathan M Plett Marina Cvetkovska Patricia Makenson Tim Xing Sharon Regan

Institution:	1. Department of Biology, Queen''s University, Biosciences Complex, Kingston, Ontario, Canada K7L 3N6;2. Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China;2. Chongqing Key Laboratory of Modern Photoelectric Detection Technology and Instrument, Chongqing University of Technology, Chongqing 400054, China;1. Key Laboratory of Low-Grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing 400030, China;2. Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China;3. School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400054, China;1. Laboratory of Entomology, Wageningen University, Wageningen, The Netherlands;2. Biometris, Wageningen University, Wageningen, The Netherlands;1. Institute of Genetic and Biophysics “Adriano Buzzati Traverso”, CNR, Via Pietro Castellino 111, 80131 Naples, Italy;2. Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Second University of Naples, Via Vivaldi 43, 81100 Caserta, Italy;3. National Research Council-CNR, Institute of Crystallography-IC, Via G. Amendola, 122/O, 70126 Bari, Italy;4. Department of Pharmacy, University of Naples “Federico II”, Via D. Montesano 49, 80131 Napoli, Italy;5. Fondazione IRCCS SDN, Naples, Italy;6. Bioker srl, Multimedica spa, Naples, Italy

Abstract:	Ethylene is a central signalling agent in mediating plant defence against pathogens. Mutations to the ethylene receptor ETR1 have been shown to alter susceptibility of plants to mycotoxin-induced cell death. Using Fumonisin B₁ (FB₁) to induce cell death, we demonstrate that the receptor mutant ein4-1 has a reduced rate of necrosis, potentially due to an upregulation of ETHYLENE RESPONSE FACTOR1. Mutations in other ethylene receptors differentially affected the expression of genes in the jasmonic and salicylic acid defence pathways. Together these data indicate that ethylene receptors do not have redundant roles in mediating FB₁-induced cell death.

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