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Plant Cell Environ

Title:		Heat stress affects potato's volatile emissions that mediate agronomically important trophic interactions
Author(s):		Munawar A; Zhang Y; Zhong J; Ge Y; Abou El-Ela AS; Mao Z; Ntiri ES; Mao LJ; Zhu Z; Zhou W;
Address:		"Institute of Insect Sciences, Ministry of Agricultural and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests, Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang Province, Zhejiang University, Hangzhou, China. Hainan Institute, Zhejiang University, Sanya, China. Department of Plant Protection, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, Egypt. College of Plant Protection, Liaoning Key Laboratory of Economic and Applied Entomology, Shenyang Agricultural University, Shenyang, China. Analysis Center of Agrobiology and Environmental Sciences, Faculty of Agriculture, Life and Environment Sciences (ACAES), Zhejiang University, Hangzhou, China"
Journal Title:		Plant Cell Environ
Year:		2022
Volume:		20220817
Issue:		10
Page Number:		3036 - 3051
DOI:		10.1111/pce.14416
ISSN/ISBN:		1365-3040 (Electronic) 0140-7791 (Linking)
Abstract:		"Potato, a cool-weather crop, emits volatile organic compounds (VOCs) which attract the specialist herbivore, Phthorimaea operculella, but also this herbivore's parasitic wasp, Trichogramma chilonis, an important biocontrol agent. What happens to this trophic system when heat stress challenges this agro-ecosystem? We studied how high temperature (HT) pre-treatments influence potato's VOC emissions and their subsequent effects on the preferences of insects, as evaluated in oviposition assays and Y-tube olfactometers. HT pre-stressed plants were less attractive to P. operculella adult moths, which were repelled by HT VOCs, but increased the recruitment of the parasitoid, T. chilonis, which were attracted. VOC emissions, including the most abundant constituent, ss-caryophyllene, were enhanced by HT treatments; some constituents elicited stronger behavioural responses than others. Transcripts of many genes in the biosynthetic pathways of these VOCs were significantly enhanced by HT treatment, suggesting increases in de novo biosynthesis. HT increased the plant's stomatal apertures, and exogenous applications of the hormone, ABA, known to suppress stomatal apertures, reduced leaf volatile emissions and affected the HT-altered plant attractions to both insects. From these results, we infer that HT stress affects this plant-insect interaction through its influence on VOC emissions, potentially decreasing herbivore ovipositions while increasing ovipositions of the parasitoid"
Keywords:		Animals Ecosystem Female Heat-Shock Response Herbivory Plants/metabolism *Solanum tuberosum/metabolism *Volatile Organic Compounds/metabolism *Wasps/physiology Phthorimaea operculella Trichogramma chilonis climate change high-temperature pre-stress insect;
Notes:		"MedlineMunawar, Asim Zhang, Yadong Zhong, Jian Ge, Yang Abou El-Ela, Amr S Mao, Zhiyao Ntiri, Eric S Mao, Li-Juan Zhu, Zengrong Zhou, Wenwu eng Research Support, Non-U.S. Gov't 2022/08/05 Plant Cell Environ. 2022 Oct; 45(10):3036-3051. doi: 10.1111/pce.14416. Epub 2022 Aug 17"