Exploring the impact of wounding and jasmonates on ascorbate metabolism |
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| Authors: | Walter P. Suza Carlos A. Avila Kelly Carruthers Shashank Kulkarni Fiona L. Goggin Argelia Lorence |
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| Affiliation: | 1. Arkansas Biosciences Institute at Arkansas State University, USA;2. Department of Entomology, University of Arkansas, Fayetteville, AR, USA;3. Department of Chemistry and Physics, Arkansas State University, P.O. Box 639, State University, AR 72467, USA;1. USDA-ARS, Crop Genetics and Breeding Research Unit, P.O. Box 748, Tifton, GA 31793, USA;2. USDA-ARS, Sugarcane Research Unit, 5883 USDA Road, Houma, LA 70360, USA;3. University of Georgia, Dept. of Microbiology, 527 Biological Sciences Bldg., 1000 Cedar St., Athens, GA 30602, USA;4. Mississippi State University, Dept. of Plant and Soil Sciences, P.O. Box 9555, Mississippi State, MS 39762, USA;1. National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China), Ministry of Agriculture, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, PR China;2. Department of Plant Sciences, North Dakota State University, Fargo, ND 58108, USA;3. School of Earth and Environment, and The UWA''s Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia;1. The New Zealand Institute for Plant & Food Research Limited, 412 No 1 Road, RD 2, Te Puke 3182, New Zealand;2. The New Zealand Institute for Plant & Food Research Limited, Food Industry Science Centre, Batchelar Road, Palmerston North 4474, New Zealand;1. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina;2. Grupo de Investigación en Ingeniería de Alimentos, Facultad de Ingeniería, UNMdP, Juan B. Justo 4302, Mar del Plata 7600, Argentina;1. University of Otago, Department of Biochemistry, PO Box 56, Dunedin 9054, New Zealand;2. The New Zealand Institute for Plant & Food Research Limited, Food Industry Science Centre, Bachelor Road, Palmerston North 4474, New Zealand;3. The New Zealand Institute for Plant & Food Research Limited, 412 No 1 Road, RD 2, Te Puke 3182, New Zealand;4. The University of Melbourne, School of BioSciences, Parkville, Melbourne, 3010 VIC, Australia;5. Queensland University of Technology, Centre for Tropical Crops and Biocommodities, Institute for Future Environments, GPO Box 2434, Brisbane, QLD 4001, Australia;1. Department of Plant Molecular Genetics, National Centre for Biotechnology (CNB-CSIC), 28049 Madrid, Spain;2. Department of Plant Systems Biology, Flanders Institute for Biotechnology (VIB), Technologiepark 927, B-9052 Gent, Belgium;3. Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, B-9052 Gent, Belgium |
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| Abstract: | Vitamin C (ascorbate, AsA) is the most abundant water-soluble antioxidant in plants. Ascorbate provides the first line of defense against damaging reactive oxygen species (ROS), and helps protect plant cells from many factors that induce oxidative stress, including wounding, ozone, high salinity, and pathogen attack. Plant defenses against these stresses are also dependent upon jasmonates (JAs), a class of plant hormones that promote ROS accumulation. Here, we review evidence showing that wounding and JAs influence AsA accumulation in various plant species, and we report new data from Arabidopsis and tomato testing the influence of JAs on AsA levels in wounded and unwounded plants. In both species, certain mutations that impair JA metabolism and signaling influence foliar AsA levels, suggesting that endogenous JAs may regulate steady-state AsA. However, the impact of wounding on AsA accumulation was similar in JA mutants and wild type controls, indicating that this wound response does not require JAs. Our findings also indicate that the effects of wounding and JAs on AsA accumulation differ between species; these factors both enhanced AsA accumulation in Arabidopsis, but depressed AsA levels in tomato. These results underscore the importance of obtaining data from more than one model species, and demonstrate the complexity of AsA regulation. |
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