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J Chem Ecol

Title:		Induced Plant Defenses Against Herbivory in Cultivated and Wild Tomato
Author(s):		Paudel S; Lin PA; Foolad MR; Ali JG; Rajotte EG; Felton GW;
Address:		"Department of Entomology, The Pennsylvania State University, 501 ASI Building, University Park, PA, 16802, USA. Department of Plant Science, The Pennsylvania State University, 103 Tyson Building, University Park, PA, 16802, USA. Department of Entomology, The Pennsylvania State University, 501 ASI Building, University Park, PA, 16802, USA. gwf10@psu.edu"
Journal Title:		J Chem Ecol
Year:		2019
Volume:		20190801
Issue:		8
Page Number:		693 - 707
DOI:		10.1007/s10886-019-01090-4
ISSN/ISBN:		1573-1561 (Electronic) 0098-0331 (Linking)
Abstract:		"Crop domestication and selective breeding have altered plant defense mechanisms, influencing insect-plant interactions. A reduction in plant resistance/tolerance against herbivory is generally expected in domesticated species, however, limited efforts have been made to compare inducibility of plant defenses between wild and domesticated genotypes. In the present study, the inducibility of several plant defense mechanisms (e.g. defensive chemicals, trichomes, plant volatiles) were investigated, and the performance and preference of the herbivore Helicoverpa zea were measured in three different tomato genotypes; a) wild tomato, Solanum pimpinellifolium L. (accession LA 2093), b) cherry tomato, S. lycopersicum L. var. cerasiforme (accession Matts Wild Cherry), and c) cultivated tomato, S. lycopersicum L. var. Better Boy). Enhanced inducibility of defensive chemicals, trichomes, and plant volatiles in the cultivated tomato, and a higher level of constitutive plant resistance against herbivory in the wild genotype was observed. When comparing the responses of damaged vs. undamaged leaves, the percent reduction in larval growth was higher on damaged leaves from cultivated tomato, suggesting a higher induced resistance compared to other two genotypes. While all tomato genotypes exhibited increased volatile organic compound (VOCs) emissions in response to herbivory, the cultivated variety responded with generally higher levels of VOCs. Differences in VOC patterns may have influenced the ovipositional preferences, as H. zea female moths significantly preferred laying eggs on the cultivated versus the wild tomato genotypes. Selection of traits during domestication and selective breeding could alter allocation of resources, where plants selected for higher yield performance would allocate resources to defense only when attacked"
Keywords:		"Animals Behavior, Animal/drug effects Catechol Oxidase/metabolism Female Genotype Herbivory Larva/physiology Solanum lycopersicum/*chemistry/genetics/metabolism Moths/*physiology Oviposition/drug effects Phenols/analysis Plant Leaves/chemistry/metabolism/;"
Notes:		"MedlinePaudel, Sulav Lin, Po-An Foolad, Majid R Ali, Jared G Rajotte, Edwin G Felton, Gary W eng AID-OAA-L-15-00001/ Agency for International Development (USAID)/ AFRI 2017-67013-26596/ Department of Agriculture/ IOS-1645548/National Science Foundation/ PEN04576/Hatch Project Grant/ 2019/08/02 J Chem Ecol. 2019 Aug; 45(8):693-707. doi: 10.1007/s10886-019-01090-4. Epub 2019 Aug 1"