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Plants (Basel)

Title:		Stimulation of Insect Herbivory by Elevated Temperature Outweighs Protection by the Jasmonate Pathway
Author(s):		Havko NE; Kapali G; Das MR; Howe GA;
Address:		"Department of Energy-Plant Research Laboratory, Michigan State University, East Lansing, MI 48824, USA. Plant Resilience Institute, Michigan State University, East Lansing, MI 48824, USA. Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA"
Journal Title:		Plants (Basel)
Year:		2020
Volume:		20200201
Issue:		2
Page Number:		-
DOI:		10.3390/plants9020172
ISSN/ISBN:		2223-7747 (Print) 2223-7747 (Electronic) 2223-7747 (Linking)
Abstract:		"Rising global temperatures are associated with increases in the geographic range, population size, and feeding voracity of insect herbivores. Although it is well established that the plant hormone jasmonate (JA) promotes durable resistance to many ectothermic herbivores, little is known about how JA-mediated defense is influenced by rising temperatures. Here, we used the Arabidopsis-Trichoplusia ni (cabbage looper) interaction to investigate the relative contribution of JA and elevated temperature to host resistance. Video monitoring of T. ni larval behavior showed that elevated temperature greatly enhanced defoliation by increasing the bite rate and total time spent feeding, whereas loss of resistance in a JA-deficient mutant did not strongly affect these behaviors. The acceleration of insect feeding at elevated temperature was not attributed to decreases in wound-induced JA biosynthesis, expression of JA-responsive genes, or the accumulation of defensive glucosinolates prior to insect challenge. Quantitative proteomic analysis of insect frass, however, provided evidence for a temperature-dependent increase in the production of T. ni digestive enzymes. Our results demonstrate that temperature-driven stimulation of T. ni feeding outweighs the protective effects of JA-mediated resistance in Arabidopsis, thus highlighting a potential threat to plant resilience in a warming world"
Keywords:		Arabidopsis Trichoplusia ni climate change elevated temperature jasmonate plant-insect interaction;
Notes:		"PubMed-not-MEDLINEHavko, Nathan E Kapali, George Das, Michael R Howe, Gregg A eng DE-FG02-91ER20021/Chemical Sciences, Geosciences and Biosciences Division, Office of Basic Energy Sciences, Office of Science, US Department of Energy/ MICL02278/Michigan AgBioResearch/ Switzerland 2020/02/07 Plants (Basel). 2020 Feb 1; 9(2):172. doi: 10.3390/plants9020172"