title: Does Plant Cultivar Difference Modify the Bottom-Up Effects of Resource Limitation on Plant-Insect Herbivore Interactions?
abstract: Variation in resource input to plants triggers bottom-up effects on plant-insect herbivore interactions. However, variation in plant intrinsic traits in response to resource availability may modify the bottom-up effects. Furthermore, the consequences also may depend on the feeding strategy of insect herbivores belonging to different feeding guilds. We evaluated the performance of two insect herbivores from distinct feeding guilds, the leaf miner Tuta absoluta and the phloem feeder Bemisia tabaci. We offered the insects two tomato cultivars growing under optimal nitrogen input vs. nitrogen limitation, or under optimal water input vs. water limitation. We found that: (i) the two cultivars differed in their responses to nitrogen and water limitation by regulating primary (leaf-gas exchange related parameters, leaf nitrogen content, and leaf C/N ratio) and secondary metabolism (main defensive compounds: glycoalkaloids); (ii) for both plant cultivars, nitrogen or water limitation significantly affected T. absoluta survival and development, while B. tabaci survival was affected only by nitrogen limitation; and surprisingly (iii) plant cultivar differences did not modify the negative bottom-up effects of resource limitation on the two insect herbivores. In conclusion, the negative effects of resource limitation cascaded up to insect herbivores even though plant cultivars exhibited various adaptive traits to resource limitation.
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France. penghan1394@gmail.com.|College of Plant Science & Technology, Huazhong Agricultural University, Wuhan, 430070, China. penghan1394@gmail.com.
authors.forename: Peng
authors.initials: P
authors.lastname: Han
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Desneux
authors.affiliation: Institut de Chimie de Nice, UMR CNRS 7272, Université Nice Sophia-Antipolis, Parc Valrose, F-06108, Nice, France.
authors.forename: Thomas
authors.initials: T
authors.lastname: Michel
authors.affiliation: UMR1115 PSH (Plantes et Systèmes de culture Horticoles), INRA, F-84000, Avignon, France.
authors.forename: Jacques
authors.initials: J
authors.lastname: Le Bot
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France.
authors.forename: Aurelie
authors.initials: A
authors.lastname: Seassau
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Wajnberg
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France.
authors.forename: Edwige
authors.initials: E
authors.lastname: Amiens-Desneux
authors.affiliation: INRA (French National Institute for Agricultural Research) Univ. Nice Sophia Antipolis, CNRS, UMR 1355-7254 Institut Sophia Agrobiotech, 400 route des chappes, 06903, Sophia-Antipolis, France.
authors.forename: Anne-Violette
authors.initials: AV
authors.lastname: Lavoir
mesh_terms: D000470:Alkaloids / Q000378:metabolism; D000818:Animals; D006430:Hemiptera / Q000254:growth & development / Q000502:physiology*; D060434:Herbivory; D007915:Lepidoptera / Q000254:growth & development / Q000502:physiology*; D018551:Solanum lycopersicum / Q000254:growth & development / Q000502:physiology*; D009584:Nitrogen / Q000378:metabolism; D010788:Photosynthesis; D000069600:Plant Breeding; D018515:Plant Leaves / Q000254:growth & development / Q000502:physiology; D014867:Water / Q000378:metabolism
chemical_list: D000470:Alkaloids; D014867:Water; D009584:Nitrogen
keywords: Bemisia tabaci; Glycoalkaloid; Nitrogen; Solanum lycopersicum; Tuta absoluta; Water