« Previous AbstractHistorical reconstruction unveils the risk of mass mortality and ecosystem collapse during pancontinental megadrought    Next AbstractEffect of Cadmium Accumulation on the Performance of Plants and of Herbivores That Cope Differently With Organic Defenses »

Oecologia

Title:		Down-regulation of plant defence in a resident spider mite species and its effect upon con- and heterospecifics
Author(s):		Godinho DP; Janssen A; Dias T; Cruz C; Magalhaes S;
Address:		"cE3c, Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal. diogoprinogodinho@hotmail.com. Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Amsterdam, The Netherlands. cE3c, Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal. cE3c, Centre for Ecology, Evolution and Environmental Changes, Faculdade de Ciencias, Universidade de Lisboa, Campo Grande, 1749-016, Lisbon, Portugal. snmagalhaes@fc.ul.pt"
Journal Title:		Oecologia
Year:		2016
Volume:		20150914
Issue:		1
Page Number:		161 - 167
DOI:		10.1007/s00442-015-3434-z
ISSN/ISBN:		1432-1939 (Electronic) 0029-8549 (Linking)
Abstract:		"Herbivorous spider mites occurring on tomato plants (Solanum lycopersicum L.) cope with plant defences in various manners: the invasive Tetranychus evansi reduces defences below constitutive levels, whereas several strains of T. urticae induce such defences and others suppress them. In the Mediterranean region, these two species co-occur on tomato plants with T. ludeni, another closely related spider mite species. Unravelling how this third mite species affects plant defences is thus fundamental to understanding the outcome of herbivore interactions in this system. To test the effect of T. ludeni on tomato plant defences, we measured (1) the activity of proteinase inhibitors, indicating the induction of plant defences, in those plants, and (2) mite performance on plants previously infested with each mite species. We show that the performance of T. evansi and T. ludeni on plants previously infested with T. ludeni or T. evansi was better than on clean plants, indicating that these two mite species down-regulate plant defences. We also show that plants attacked by these mite species had lower activity of proteinase inhibitors than clean plants, whereas herbivory by T. urticae increased the activity of these proteins and resulted in reduced spider mite performance. This study thus shows that the property of down-regulation of plant defences below constitutive levels also occurs in T. ludeni"
Keywords:		Animals *Disease Resistance Down-Regulation *Herbivory Solanum lycopersicum/metabolism/*physiology Mediterranean Region Mites/physiology *Plant Diseases Protease Inhibitors/metabolism Species Specificity Tetranychidae/*physiology Plant defences Plant-herb;
Notes:		"MedlineGodinho, Diogo P Janssen, Arne Dias, Teresa Cruz, Cristina Magalhaes, Sara eng Research Support, Non-U.S. Gov't Germany 2015/09/16 Oecologia. 2016 Jan; 180(1):161-7. doi: 10.1007/s00442-015-3434-z. Epub 2015 Sep 14"