Plant coexistence alters terpene emission and content of Mediterranean species

Ormeño, Elena; Fernandez, Catherine; Mévy, Jean-Philippe

doi:10.1016/j.phytochem.2006.11.033

Cited by 81 publications

(60 citation statements)

References 41 publications

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“…succinic acid, the second most highly concentrated compound) with the competition indexes of trees. This reduction of defensive compounds under competition was also observed by Cipollini and Bergelson (2001), Ormeño et al (2007b) and Stamp et al (2004) respectively in Brassica, Rosmarinus and Lycopersicon under experimental conditions. As stated by these authors, the lower nutrient availability can explain the reduced concentration of allelochemicals in stressed plants.…”

Section: Discussionsupporting

confidence: 83%

Does competition stress decrease allelopathic potential?

Rivoal¹,

Fernandez²,

Greff³

et al. 2011

Biochemical Systematics and Ecology

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a b s t r a c tIn natural communities, plants compete in different ways, among them chemical interactions in the form of allelopathy. Whereas the effects of abiotic stresses (temperature, light, nutrients, etc.) on the production of allelochemicals are well known, only few studies deal with the impact of the stress induced by competition. When they do so, these studies are done under experimental conditions. The aim of this study is to evaluate the effect of intra-specific competition on the production of allelochemicals and biomass of Pinus halepensis Mill. in a natural forest using three levels of density. Phenolics and aliphatic acids were extracted from pine needles, analysed and quantified by GC-MS. Trunks, branches, needles and necromass were measured. We observed an increase in allelochemical content at low or medium level of competition and a decrease at high competition level. Moreover trees in competition allocate proportionally more biomass to the trunk and less to foliage and branches. This study provides evidence of substantial changes in allocation between the primary and the secondary metabolism.

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Section: Discussionsupporting

confidence: 83%

Does competition stress decrease allelopathic potential?

Rivoal¹,

Fernandez²,

Greff³

et al. 2011

Biochemical Systematics and Ecology

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“…This same threshold effect was not observed for terpene foliar concentrations and terpene emissions from Mediterranean tree species and C4 crops (Blanch et al, 2009;Graus et al, 2013). However, other studies have demonstrated that under severe enough drought stress, monoterpene emissions also begin to decrease (Ormeno et al, 2007;Simpraga et al, 2011). Presumably, at some extreme, the plant shuts down metabolic activity and terpene pools, if present, are depleted.…”

Section: Introductionmentioning

confidence: 53%

Impacts of simulated herbivory on volatile organic compound emission profiles from coniferous plants

2015

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Abstract. The largest global source of volatile organic compounds (VOCs) in the atmosphere is from biogenic emissions. Plant stressors associated with a changing environment can alter both the quantity and composition of the compounds that are emitted. This study investigated the effects of one global change stressor, increased herbivory, on plant emissions from five different coniferous species: bristlecone pine (Pinus aristata), blue spruce (Picea pungens), western redcedar (Thuja plicata), grand fir (Abies grandis), and Douglas-fir (Pseudotsuga menziesii). Herbivory was simulated in the laboratory via exogenous application of methyl jasmonate (MeJA), a herbivory proxy. Gas-phase species were measured continuously with a gas chromatograph coupled to a mass spectrometer and flame ionization detector (GC-MS-FID). Stress responses varied between the different plant types and even between experiments using the same set of saplings. The compounds most frequently impacted by the stress treatment were alpha-pinene, beta-pinene, 1,8-cineol, beta-myrcene, terpinolene, limonene, and the cymene isomers. Individual compounds within a single experiment often exhibited a different response to the treatment from one another.

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“…Plant metabolism plays an important role in the interaction of biotic, like competition (Ormeño et al, 2007), abiotic, as drought (Ramakrishna and Ravishankar, 2011) and xenobiotic, as herbicide application (Song et al, 2007) factors in the competition between plants (Ormeño et al, 2007). Among responses that plants have against these stresses include increased membrane peroxidation, which affects the structure and function of the photosynthetic apparatus, inactivating the reaction centers of the photosystems (Tripathy et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Change in Physiological Features in Ryegrass Biotypes in Competition With Soybean Due Resistance to Glyphosate

et al. 2016

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-Herbicide resistance can cause biochemical, physiological, morphological and phenological changes in weeds, altering their competitive ability against crops. The aim of the study was to assess physiological changes and cellular damage in susceptible and resistant biotypes of ryegrass and soybeans under competition. Three experiments were conducted in a greenhouse using a completely randomized design with four replications performed in a replacement series. The ratios of soybean and to susceptible (experiment 1) and resistant ryegrass (experiment 2) and of susceptible to resistant (experiment 3) ryegrass were 100:0, 75:25, 50:50, 25:75 and 0:100. Forty days after the emergence of the soybean crop and 60 days after the emergence of the ryegrass plants, the leaves of the competing plants were collected. The following variables were assessed: the levels of carotenoids, chlorophylls and total phenolic compounds; amount of hydrogen peroxide; degrees of lipid peroxidation and electrolyte leakage; and activity of enzymes catalase, superoxide dismutase and ascorbate peroxidase. The production of phenols and increased oxidative damage due to interspecies competition with ryegrass was, in general, observed in the soybeans; the ryegrass biotypes, susceptible and resistant to glyphosate, coexisting with soybean have generally higher oxidative damage due to intraspecific competition; since when these biotypes coexist not present modifications of these parameters.Keywords: oxidative stress, antioxidant enzymes, adaptability of herbicide resistant plants. RESUMO -A resistência aos herbicidas pode causar mudanças bioquímicas,fisiológicas, morfológicas ou fenológicas nas plantas daninhas alterando a capacidade competitiva com as culturas.O objetivo do estudo foi verificar alterações na fisiologia e os danos celulares em biótipos de azevém resistente

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Plant coexistence alters terpene emission and content of Mediterranean species

Cited by 81 publications

References 41 publications

Does competition stress decrease allelopathic potential?

Does competition stress decrease allelopathic potential?

Impacts of simulated herbivory on volatile organic compound emission profiles from coniferous plants

Change in Physiological Features in Ryegrass Biotypes in Competition With Soybean Due Resistance to Glyphosate

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