Developmental and reproductive performance of a specialist herbivore depend on seasonality of, and light conditions experienced by, the host plant

Uyi, Osariyekemwen; Zachariades, C.; Heshula, L.U.P.; Hill, M. P.

doi:10.1371/journal.pone.0190700

Cited by 15 publications

(13 citation statements)

References 59 publications

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“…Moreover, seasonal changes in water supply can alter physiological characteristics such as turgor pressure (Mitchell et al 2008;Simpson et al 2012) and water content (Claussen 2005;Fernàndez-Martínez et al 2013) and, thereby, influence plant palatability (Huberty and Denno 2004). In addition, traits related to structural defenses including tissue toughness and cuticle thickness have been reported to vary across seasons (Gotsch et al 2010) and may contribute to circannual patterns of herbivore resistance (Peeters 2002;Uyi et al 2018). Hence, plant resistance to herbivores and herbivore performance may be influenced by a wide variety of plant traits apart from plant defense metabolites (Hu et al 2018;Huang et al 2019).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale

et al. 2019

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Plants experience seasonal fluctuations in abiotic and biotic factors such as herbivore attack rates. If and how root defense expression co-varies with seasonal fluctuations in abiotic factors and root herbivore attack rates is not well understood. Here, we evaluated seasonal changes in defensive root latex chemistry of Taraxacum officinale plants in the field and correlated the changes with seasonal fluctuations in abiotic factors and damage potential by Melolontha melolontha, a major natural enemy of T. officinale. We then explored the causality and consequences of these relationships under controlled conditions. The concentration of the defensive sesquiterpene lactone taraxinic acid β-D glucopyranosyl ester (TA-G) varied substantially over the year and was most strongly correlated to mean monthly temperature. Both temperature and TAG levels were correlated with annual fluctuations in potential M. melolontha damage. Under controlled conditions, plants grown under high temperature produced more TAG and were less attractive for M. melolontha. However, temperature-dependent M. melolontha feeding preferences were not significantly altered in TAG deficient transgenic lines. Our results suggest that fluctuations in temperature leads to variation in the production of a root defensive metabolites that co-varies with expected attack of a major root herbivore. Temperature-dependent herbivore preference, however, is likely to be modulated by other phenotypic alterations.

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale

et al. 2019

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“…However, the equal reproductive performance of moths fed on full-sun and shaded foliage is inconsistent with the CNB hypothesis and does not appear to extinguish the debates surrounding the hypothesis in terms of herbivore performance. Although, the CNB hypothesis predicts that leaves from plants in shaded environments are more suitable sources of food for insect herbivores and that herbivorous insects would perform better on such leaves, empirical evidence often suggests variable patterns [3][4][5]8,9,11,42 .…”

Section: Correlations Between Leaf Consumption and Herbivore Performamentioning

confidence: 99%

“…Conspecific plant species vary their leaf chemistry and phenotypic characteristics when grown in different habitats 1 – 4 . Herbivorous insects, in turn, are affected by these differences, with complex variations in their performance in response to leaf properties 5 – 9 .…”

Section: Introductionmentioning

confidence: 99%

Light environments affect herbivory patterns but not reproductive performance of a multivoltine specialist moth, Pareuchaetes pseudoinsulata

Uyi

2020

Sci Rep

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Unravelling the responses of insect herbivores to light-environment-mediated variation in the traits of their host plants is central to our understanding of the nutritional ecology of, and factors driving the population dynamics in, these species. This study examined the effect of light environment (shaded vs full-sun habitat) on leaf toughness and leaf nutritional quality in Chromolaena odorata (an invasive species in West Africa) and related these attributes to the abundance, herbivory patterns and reproductive performance of a multivoltine specialist moth, Pareuchaetes pseudoinsulata (a biological control agent). In this system, plants growing in shaded areas in the field experienced more herbivory and had higher herbivore abundance than those growing in full-sun. In the laboratory, P. pseudoinsulata larvae consumed significantly greater amounts of shaded foliage relative to full-sun foliage. However, reproductive performance metrics such as mating success, pre-oviposition period, number of eggs laid, duration of egg laying, egg hatchability, and adult longevity in P. pseudoinsulata did not differ according to foliage types. Reduced leaf toughness, increased water and nitrogen contents in shaded leaves coincided with increased leaf consumption by the larvae of P. pseudoinsulata. In summary, this study showed for the first time that light environments affect herbivory patterns but not reproductive performance of P. pseudoinsulata and hypothesized that high foliar nitrogen and water contents in shaded leaves resulted in feedback and necessity consumption patterns.

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“…Individual plants of the same species often exhibit a range of physical and chemical differences based on abiotic factors such as light intensity, rainfall, soil composition, and temperature (Bisigato et al 2015;Boege & Dirzo 2004;Sarfraz et al 2013;Uyi et al 2017). Intraspecific variation in plant characteristics is commonly found among different light environments (Barber & Marquis 2011;Ingersoll et al 2010;Osier & Jennings 2007;Wyka et al 2012), since light intensity can directly affect the photosynthetic rate of plants, influencing morphological, physiological and biochemical processes (Mathur et al 2018;Uyi et al 2018;Zhang & Wen 2009).…”

Section: Introduction _______________________________________________mentioning

confidence: 99%

“…Nutrient content is also thought to play a major role in determining insect performance. Nitrogen is thought to often be the limiting nutrient for insect herbivores (Mattson 1980;Uyi et al 2018), since many studies have shown that insects perform better on foliage with higher nitrogen content. For instance, Osier and Jennings (2007), found that foliar nitrogen content was the strongest determinant for insect performance for promethea moth (Callosamia promethea); larval mass, survivorship, and developmental rate were positively correlated with foliar nitrogen (Osier & Jennings 2007).…”

Section: Introduction _______________________________________________mentioning

confidence: 99%

Preference and performance of Hypena opulenta on Vincetoxicum rossicum foliage from sun versus shade habitats

Rochette¹

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Characteristics of individual plants from the same species can differ significantly between habitats based on abiotic factors such as light intensity and temperature. In turn, these differences in plant quality can affect herbivores that feed on the plant. Here, we examined the effects of habitat on leaf characteristics for the invasive vine Vincetoxicum rossicum, as well as the preference and performance of its biological control agent, Hypena opulenta, on sun versus shade foliage. V. rossicum leaves grown in sunny habitats were tougher, thicker, and had lower water content than shade leaves. H. opulenta larvae consumed greater amounts of shaded foliage than sun foliage and were predominately night-active. H. opulenta larval development did not differ between sun and shade foliage diets; however, females preferred to oviposit on sun foliage. The underlying mechanisms of these results are discussed, as well as their implications for the biological control of Vincetoxicum species.iii

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Developmental and reproductive performance of a specialist herbivore depend on seasonality of, and light conditions experienced by, the host plant

Cited by 15 publications

References 59 publications

Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale

Impact of Seasonal and Temperature-Dependent Variation in Root Defense Metabolites on Herbivore Preference in Taraxacum officinale

Light environments affect herbivory patterns but not reproductive performance of a multivoltine specialist moth, Pareuchaetes pseudoinsulata

Preference and performance of Hypena opulenta on Vincetoxicum rossicum foliage from sun versus shade habitats

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