Tobacco overexpressing β-ocimene induces direct and indirect responses against aphids in receiver tomato plants

Cascone, Pasquale; Iodice, Luigi; Maffei, Massimo E.; Bossi, Simone; Arimura, Gen Ichiro; Guerrieri, Emilio

doi:10.1016/j.jplph.2014.08.011

Cited by 74 publications

(50 citation statements)

References 20 publications

(41 reference statements)

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“…Immediately after the wind tunnel assay, plants from each treatment were used for the collection of head‐space volatiles by an airtight entrainment system. The system consisted of a bell jar containing a single plant in the pot, connected to a circulation pump forcing air through an adsorbent trap made of Tenax (Cascone et al ., ). In order to reduce any stress to the plant in the system, each collection lasted 3 h.…”

Section: Methodsmentioning

confidence: 97%

Trichoderma harzianum enhances tomato indirect defense against aphids

Coppola

Cascone²,

Chiusano

et al. 2017

Insect Science

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Many fungal root symbionts of the genus Trichoderma are well-known for their beneficial effects on agronomic performance and protection against plant pathogens; moreover, they may enhance protection from insect pests, by triggering plant resistance mechanisms. Defense barriers against insects are induced by the activation of metabolic pathways involved in the production of defense-related plant compounds, either directly active against herbivore insects, or exerting an indirect effect, by increasing the attraction of herbivore natural enemies. In a model system composed of the tomato plant, the aphid Macrosiphum euphorbiae and the parasitoid Aphidius ervi, plant metabolic changes induced by Trichoderma harzianum and their effects on higher trophic levels have been assessed. T. harzianum T22 treatments induce a primed state that upon aphid attacks leads to an increased attraction of aphid parasitoids, mediated by the enhanced production of volatile organic compounds (VOCs) that are known to induce Aphidius ervi flight. Transcriptome sequencing of T22-treated plants infested by aphids showed a remarkable upregulation of genes involved in terpenoids biosynthesis and salicylic acid pathway, which are consistent with the observed flight response of A. ervi and the VOC bouquet profile underlying this behavioral response.

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Section: Methodsmentioning

confidence: 97%

Trichoderma harzianum enhances tomato indirect defense against aphids

Coppola

Cascone²,

Chiusano

et al. 2017

Insect Science

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“…Noteworthily, egg parasitoids seek their hosts in a dynamic and complex environment, relying on different chemical cues emitted by adult host, its products, egg itself, host plants and by the interaction between egg and plant surface (Fatouros et al 2008;Cascone et al 2015;Salerno et al 2009;Romeis et al 2005;Colazza et al 2007). Parasitoid behaviour is directly linked to its reproductive success and consequently studies concerning foraging strategies are useful to enhance the biological control of agricultural pests.…”

Section: Introductionmentioning

confidence: 99%

Improving the efficiency of Trichogramma achaeae to control Tuta absoluta

et al. 2015

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Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), commonly known as the tomato borer, is native to South America and has rapidly spread in various European countries becoming one of the major threats of tomato crop. The parasitic wasp Trichogramma achaeae Nagaraja and Nagarkatti (Hymenoptera: Trichogrammatidae) has been suggested as a possible biological control agent of the invasive pest and several aspects of its taxonomy have been elucidated. As for other egg parasitoids, the parasitism rate of this species is influenced by the rearing host and by the biotic environment, especially temperature. Starting from commercially available material, we assessed the influence of different rearing host eggs on T. achaeae longevity and fertility. We found that a single generation of the parasitoid on Tuta absoluta eggs laid on tomato leaf significantly improved T. achaeae attack rate against the tomato borer.Moreover, we found a positive effect between temperatures during development (acclimation) and the fertility of the parasitoid at different temperatures. This was particularly evident at 15°C which was optimal for parasitoid fertility at low temperatures. We conclude that the combination of rearing system (plant ? host egg) and temperatures (during development and use) are crucial factors for optimizing efficiency in terms of longevity and fertility of this species as a biocontrol agent of the tomato borer.

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“…The plant genotype selected for this research was cv San Marzano nano (a cultivar with a determined growth rate), which is economically important for fresh consumption or for canning (http://www.consorziopomodorosanmarzanodop. it/index.php?option=com_content&view=article&id=83& Itemid=74&lang=en), whose aboveground and belowground interactions were investigated recently (Digilio et al, 2012;Battaglia et al, 2013;Cascone et al, 2014). Here, a multidisciplinary approach, involving ecophysiological, morphometric, biochemical, and molecular analyses, was used to verify the plant response to WS during AM symbiosis.…”

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confidence: 99%

Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

et al. 2016

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Arbuscular mycorrhizal (AM) fungi, which form symbioses with the roots of the most important crop species, are usually considered biofertilizers, whose exploitation could represent a promising avenue for the development in the future of a more sustainable next-generation agriculture. The best understood function in symbiosis is an improvement in plant mineral nutrient acquisition, as exchange for carbon compounds derived from the photosynthetic process: this can enhance host growth and tolerance to environmental stresses, such as water stress (WS). However, physiological and molecular mechanisms occurring in arbuscular mycorrhiza-colonized plants and directly involved in the mitigation of WS effects need to be further investigated. The main goal of this work is to verify the potential impact of AM symbiosis on the plant response to WS. To this aim, the effect of two AM fungi (Funneliformis mosseae and Rhizophagus intraradices) on tomato (Solanum lycopersicum) under the WS condition was studied. A combined approach, involving ecophysiological, morphometric, biochemical, and molecular analyses, has been used to highlight the mechanisms involved in plant response to WS during AM symbiosis. Gene expression analyses focused on a set of target genes putatively involved in the plant response to drought, and in parallel, we considered the expression changes induced by the imposed stress on a group of fungal genes playing a key role in the water-transport process. Taken together, the results show that AM symbiosis positively affects the tolerance to WS in tomato, with a different plant response depending on the AM fungi species involved.

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Tobacco overexpressing β-ocimene induces direct and indirect responses against aphids in receiver tomato plants

Cited by 74 publications

References 20 publications

Trichoderma harzianum enhances tomato indirect defense against aphids

Trichoderma harzianum enhances tomato indirect defense against aphids

Improving the efficiency of Trichogramma achaeae to control Tuta absoluta

Insights On the Impact of Arbuscular Mycorrhizal Symbiosis On Tomato Tolerance to Water Stress

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