Specificity of induced defenses, growth, and reproduction in lima bean (<i>Phaseolus lunatus</i>) in response to multispecies herbivory

Moreira, Xoaquín; Abdala‐Roberts, Luis; Hernández‐Cumplido, Johnattan; Cuny, Maximilien A. C.; Glauser, Gaëtan; Benrey, Betty

doi:10.3732/ajb.1500255

Cited by 39 publications

(54 citation statements)

References 58 publications

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“…Our results showed that there is herbivore specificity of plant–plant communication, because herbivore resistance on receiver Baccharis salicifolia plants increased only when emitter and receiver plants were attacked by the same aphid species. Specificity of induced defences against herbivores has been found across several plant–herbivore systems (Agrawal, ; Bingham & Agrawal, ; Xiao et al ., ; Moreira et al ., , ; Rowen & Kaplan, ). Such specificity could have evolved by means of natural selection, and may thus be adaptive (Bingham & Agrawal, ).…”

Section: Discussionmentioning

confidence: 99%

Herbivore specificity and the chemical basis of plant–plant communication in Baccharis salicifolia (Asteraceae)

et al. 2016

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It is well known that plant damage by leaf-chewing herbivores can induce resistance in neighbouring plants. It is unknown whether such communication occurs in response to sap-feeding herbivores, whether communication is specific to herbivore identity, and the chemical basis of communication, including specificity. We carried out glasshouse experiments using the California-native shrub Baccharis salicifolia and two ecologically distinct aphid species (one a dietary generalist and the other a specialist) to test for specificity of plant-plant communication and to document the underlying volatile organic compounds (VOCs). We show specificity of plant-plant communication to herbivore identity, as each aphid-damaged plant only induced resistance in neighbours against the same aphid species. The amount and composition of induced VOCs were markedly different between plants attacked by the two aphid species, providing a putative chemical mechanism for this specificity. Furthermore, a synthetic blend of the five major aphid-induced VOCs (ethanone, limonene, methyl salicylate, myrcene, ocimene) triggered resistance in receiving plants of comparable magnitude to aphid damage of neighbours, and the effects of the blend exceeded those of individual compounds. This study significantly advances our understanding of plant-plant communication by demonstrating the importance of sap-feeding herbivores and herbivore identity, as well as the chemical basis for such effects.

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Section: Discussionmentioning

confidence: 99%

Herbivore specificity and the chemical basis of plant–plant communication in Baccharis salicifolia (Asteraceae)

et al. 2016

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“…We performed phenolic profiling according to Moreira et al . 33 . Briefly, we used ultrahigh-pressure liquid chromatography-quadrupole-time-of-flight mass spectrometry (UHPLC-QTOF-MS) to detect, identify and quantify phenolic compounds.…”

Section: Methodsmentioning

confidence: 99%

Interactive effects of plant neighbourhood and ontogeny on insect herbivory and plant defensive traits

Moreira

Glauser

Abdala‐Roberts

2017

Sci Rep

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Plant ontogenetic stage and features of surrounding plant neighbourhoods can strongly influence herbivory and defences on focal plants. However, the effects of both factors have been assessed independently in previous studies. Here we tested for the independent and interactive effects of neighbourhood type (low vs. high frequency of our focal plant species in heterospecific stands) and ontogeny on leaf herbivory, physical traits and chemical defences of the English oak Quercus robur. We further tested whether plant traits were associated with neighbourhood and ontogenetic effects on herbivory. We found that leaf herbivory decreased in stands with a low frequency of Q. robur, and that saplings received less herbivory than adult trees. Interestingly, we also found interactive effects of these factors where a difference in damage between saplings and adult trees was only observed in stands with a high frequency of Q. robur. We also found strong ontogenetic differences in leaf traits where saplings had more defended leaves than adult trees, and this difference in turn explained ontogenetic differences in herbivory. Plant trait variation did not explain the neighbourhood effect on herbivory. This study builds towards a better understanding of the concurrent effects of plant individual- and community-level characteristics influencing plant-herbivore interactions.

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“…Induced resistance between different herbivore species has been shown in lima bean (Hernández‐Cumplido et al, ; Moreira et al, ) and other plant species (Agrawal, ; Rodriguez‐Saona et al, ). Given that parasitoids reduce the amount of damage by herbivores and change herbivore physiology, it is possible that induced resistance could be compromised by their presence.…”

Section: Discussionmentioning

confidence: 99%

“…Wild lima bean plants ( Phaseolus lunatus ) are naturally distributed along the Pacific coast from Mexico to South America (Freytag & Debouck, ). In our field site (see below), this annual legume germinates in June–July, produces flowers in October–November and seeds in December–January (Hernández‐Cumplido et al, ; Moreira et al, ). During the growing stage, lima bean plants are attacked by several leaf‐chewing insects, including the velvet armyworm Spodoptera latifascia (Lepidoptera: Noctuidae; Cuny et al, ).…”

Section: Methodsmentioning

confidence: 99%

“…This plant species has been used as a biological system in studies of plant–herbivore–parasitoid interactions. One study found that when lima bean plants are exposed to different herbivore species, the order of arrival of the leaf beetle species Diabrotica balteata and the caterpillar species Spodoptera latifascia differentially affected plant seed traits (Moreira et al, ). Leaf herbivory by the beetle species Ceratoma ruficornis also influences plant responses and subsequent infestations by pre‐dispersal seed beetles and their parasitoids (Hernández‐Cumplido et al, ).…”

Section: Introductionmentioning

confidence: 99%

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Parasitoids of leaf herbivores enhance plant fitness and do not alter caterpillar‐induced resistance against seed beetles

2019

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Organisms of the third trophic level can indirectly interact with plants. However, whether parasitoids of herbivores have a positive effect on plant fitness has been controversial. In addition to possible effects on plant fitness, parasitoid‐mitigated herbivory can modify plant physiological responses and thereby alter the plant‐mediated indirect interactions between different herbivore species. These types of indirect multitrophic interactions remain largely unexplored. Thus, to understand the full effect of the third trophic level on plants, it is necessary to consider the context of the community of interacting species, both herbivores and their enemies. Here, we investigated whether parasitoids of leaf‐feeding caterpillars affect plant fitness (seed quantity and quality) and the consequences for seed‐dwelling insects at the second and third trophic levels through plant‐mediated effects. To test this, we exposed lima bean plants (Phaseolus lunatus), under controlled field conditions, to caterpillars (Spodoptera latifascia) that were unparasitized or parasitized by the parasitoid species Cotesia marginiventris. Later in the season, we measured seed production and infestation by seed beetles and their parasitoids. We found that parasitoids significantly reduced the leaf damage inflicted by the caterpillars, such that the plants suffered no loss in seed production. Yet, parasitoids had no effect on the emergence of seed beetles (Zabrotes subfasciatus and Acanthoscelides obtectus), which was equally reduced in plants attacked by unparasitized and by parasitized caterpillars. Seeds from undamaged plants were significantly more attacked by Z. subfasciatus beetles. Parasitism rates of seed beetle larvae were similar for all treatments. Although parasitized caterpillars did not damage the plants enough to reduce seed production (unlike unparasitized caterpillars), the damage they inflicted induced resistance against other herbivores. Taken together, these results show how parasitoids can indirectly enhance plant fitness in the context of the local multitrophic ecological networks. These findings have significant implications for natural and agricultural systems since they reveal that the indirect interaction between plants and parasitoids can be beneficial in communities with multiple herbivore species.

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Specificity of induced defenses, growth, and reproduction in lima bean (Phaseolus lunatus) in response to multispecies herbivory

Abstract: Overall, this study highlights novel aspects of the specificity of plant responses induced by damage from multiple species of herbivores and uniquely associates such effects with plant lifetime fitness.

Cited by 39 publications

References 58 publications

Herbivore specificity and the chemical basis of plant–plant communication in Baccharis salicifolia (Asteraceae)

Herbivore specificity and the chemical basis of plant–plant communication in Baccharis salicifolia (Asteraceae)

Interactive effects of plant neighbourhood and ontogeny on insect herbivory and plant defensive traits

Parasitoids of leaf herbivores enhance plant fitness and do not alter caterpillar‐induced resistance against seed beetles

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