Volatile organic compounds of <i>Acacia longifolia</i> and their effects on germination and early growth of species from invaded habitats

Souza‐Alonso, Pablo; González, Luís; López-Nogueira, Antonio; Cavaleiro, Carlos; Pedrol, Nuria

doi:10.1080/02757540.2017.1404584

Cited by 16 publications

(10 citation statements)

References 55 publications

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“…Following the methodology of Barney et al [ 38 ], other authors have demonstrated the phytotoxic properties of different plant species (e.g., Artemisia vulgaris , Calamintha nepeta , Acacia longifolia ) through the natural emission of volatile organic compounds in a closed atmosphere, e.g., [ 38 , 48 , 49 ]. However, the bioherbicide potential of the VOCs emitted by the aerial biomass of U .…”

Section: Discussionmentioning

confidence: 99%

On the bioherbicide potential of Ulex europaeus and Cytisus scoparius: Profiles of volatile organic compounds and their phytotoxic effects

et al. 2018

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The phytotoxic potential of the legume shrubs Ulex europaeus L. (gorse) and Cytisus scoparius (L.) Link. (Scotch broom) is studied in this work for the first time. On the basis of their richness in active principles, the previous evidence of biological activity, and the abundance of biomass in their native range and invaded areas, a question arose: can U. europaeus and C. scoparius be considered as potential sources of natural herbicides for sustainable agriculture? By means of volatile bioassays, the flowering fresh plant material of both shrub species was shown to produce and emit volatile organic compounds (VOCs) able to inhibit the germination and/or early growth of two agricultural weeds: Amaranthus retroflexus and Digitaria sanguinalis. Novel complete VOCs profiles from the volatile extracts of the shrub species were obtained by GC and GC/MS. A total of 20 compounds were identified from U. europaeus flowering biomass, theaspirane and eugenol, among others, being described in gorse for the first instance. The chemical profile of C. scoparius yielded 28 compounds and was rich in oxygenated monoterpenes such as terpinen-4-ol, verbenol, α-terpineol, and verbenone, which were also identified in this species for the first time. Using dose-response bioassays with pure compounds, these VOCs were argued to be involved in the phytotoxicity observed for the plant materials, even at very low concentrations. The phytotoxic effects were predominantly irreversible, particularly for D. sanguinalis, since the seeds exposed to the VOCs produced damaged seedlings, were unable to recover germination capacity after removing the phytotoxin or, when recovered, produced unviable seedlings. Our results extend the interest of the abundant U. europaeus and C. scoparius for the obtention of natural products with bioherbicide potential, or to be used as allelopathic biomass in the development of new sustainable agricultural practices.

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Section: Discussionmentioning

confidence: 99%

On the bioherbicide potential of Ulex europaeus and Cytisus scoparius: Profiles of volatile organic compounds and their phytotoxic effects

et al. 2018

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“…Moreover, there is evidence for allelopathic effects from both species. Acacia dealbata releases phytotoxic compounds into the surrounding environment that affect the growth of neighbouring plants (Lorenzo et al, 2011; Aguilera et al, 2015), whereas A. longifolia has the potential to inhibit chemically the establishment of co-evolved plants (Ens et al, 2009) and its volatile compounds released from flowers and leaves have shown phytotoxic character (Souza-Alonso et al, 2018). Consequently, the phytotoxic activity exhibited justifies the inclusion of A. dealbata and A. longifolia in our assay, in the search for potential uses as natural herbicides.…”

Section: Introductionmentioning

confidence: 99%

Exploring the use of residues from the invasive Acacia sp. for weed control

Souza‐Alonso

Puig

Pedrol

et al. 2018

Renew. Agric. Food Syst.

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A sustainable practice for weed control and crop protection is the incorporation of green manures with phytotoxic potential. It is gaining attention as a way to reduce the use of synthetic herbicides in agriculture and so pot experiments and field trials were conducted to explore the possible use of residues of Acacia species to alleviate weed emergence. We assessed, under greenhouse conditions, the herbicidal effect of phytotoxic manures from Acacia dealbata and Acacia longifolia applied to soil at different doses (1.5 and 3% w/w) on maize growth, some accompanying weeds, and the physiological profile of soil microbes. Applied at a higher dose, A. dealbata residues reduced the emergence of dicotyledons in the short-term (P < 0.05) and, after 30 days, there was a decrease in total weed emergence (P < 0.005) and a mild effect on weed composition, while total weed biomass remained unaffected. Regardless of the inclusion of Acacia residues, the physiological profile of the soil bacterial community did not show significant alterations. Additionally, we tested A. dealbata residues as a mulch or a green manure at the field scale. Although the effects of manures were site-dependent and affected monocot and dicot weeds differentially, dicots were more sensitive. The herbicide potential of acacia residues was only evident for dicots at sites with low-weed density in the seed bank. Nevertheless, due to the absence of phytotoxic effects on maize and minor modifications in the functional profile of bacterial communities, residues of acacia could be used as a complementary tool used together with other practices to reduce the reliance on synthetic herbicides in maize-based cropping systems.

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“…Later, similar studies with VOCs were carried out on Acacia cyanophylla [219] and Acacia longifolia , where the dense atmosphere under thick canopies could be associated with reduction in plant richness [220]. In both studies, significant allelopathic activity was shown against a number of plant species.…”

Section: Allelochemicals In Treesmentioning

confidence: 90%

“…The composition of VOCs varied significantly within various plant parts. Qualitative and quantitative differences between various parts of plants in VOCs composition, but the similar negative effects on seedlings suggest that they are caused by the entire set of VOCs rather than by a single compound [220]. All of these studies were carried out only under laboratory conditions thus field testing is required.…”

Section: Allelochemicals In Treesmentioning

confidence: 99%

…Fell Upas Sits, the Hydra-Tree of Death †, or the Phytotoxicity of Trees

2019

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The use of natural products that can serve as natural herbicides and insecticides is a promising direction because of their greater safety for humans and environment. Secondary metabolites of plants that are toxic to plants and insects—allelochemicals—can be used as such products. Woody plants can produce allelochemicals, but they are studied much less than herbaceous species. Meanwhile, there is a problem of interaction of woody species with neighboring plants in the process of introduction or invasion, co-cultivation with agricultural crops (agroforestry) or in plantation forestry (multiclonal or multispecies plantations). This review describes woody plants with the greatest allelopathic potential, allelochemicals derived from them, and the prospects for their use as biopesticides. In addition, the achievement of and the prospects for the use of biotechnology methods in relation to the allelopathy of woody plants are presented and discussed.

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Volatile organic compounds of Acacia longifolia and their effects on germination and early growth of species from invaded habitats

Cited by 16 publications

References 55 publications

On the bioherbicide potential of Ulex europaeus and Cytisus scoparius: Profiles of volatile organic compounds and their phytotoxic effects

On the bioherbicide potential of Ulex europaeus and Cytisus scoparius: Profiles of volatile organic compounds and their phytotoxic effects

Exploring the use of residues from the invasive Acacia sp. for weed control

…Fell Upas Sits, the Hydra-Tree of Death †, or the Phytotoxicity of Trees

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