Allelopathic effects of Pinus halepensis and Quercus coccifera on the germination of Mediterranean crop seeds

Alrababah, Mohammad A.; Tadros, Maher J.; Samarah, Nezar H.; Ghosheh, Hani Z.

doi:10.1007/s11056-009-9145-8

Cited by 28 publications

(18 citation statements)

References 22 publications

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“…In contrast, Alrababah et al. () found that legumes were highly sensitive to allelopathic compounds produced by this pine species, highlighting the species‐specific nature of plant responses to chemical defence.…”

Section: Discussionmentioning

confidence: 68%

Stand management to reduce fire risk promotes understorey plant diversity and biomass in a semi‐aridPinus halepensisplantation

Jiménez

Spotswood²,

Cañadas

et al. 2014

Applied Vegetation Science

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Questions: How do thinning and understorey management practices (ploughing, clearing) to reduce fire risk affect plant species composition, diversity and biomass within pine plantations on previous croplands? Do managed pine plantations promote changes in plant succession compared to unplanted areas (old fields) towards restoration goals including holm oak forest or other alternative land-use types?Location: Altiplano del Conejo, Guadix-Baza Basin, SE Iberian Peninsula, Spain.Methods: We evaluated plant species composition, diversity, cover and biomass in the understorey of a semi-arid 10-yr-old afforestation area of Pinus halepensis through a manipulative experiment in which four different thinning regimes (T0 treatment: control plots; T100, T75, T60 and T48 treatments: 100%, 75%, 60%, and 48% of mean basal area removed, respectively), and two understorey vegetation treatments (clearing, ploughing) were applied, simulating stand practices to reduce fire risk. Sampling was performed annually for 5 yr (from 2006 to 2010). For comparison, four other land-use types (rain-fed cereal crops, old fields, alpha grass steppes and holm oak forests) were sampled to quantify understorey vegetation community composition and diversity.Results: Afforestation plots were compositionally distinct from each other within 5 yr, mainly as a result of canopy thinning and to a lesser extent, vegetation treatments. Total species richness was highest in the low to medium densities of pines, where richness approached that found in native communities. However, afforestation plots were most similar in diversity, life-form type and composition to abandoned agricultural fields, and large differences were found between afforestation plots, native forests and alpha grass steppes.Conclusions: This study demonstrates that plant species composition in the understorey of pine plantations on former cropland can respond rapidly to common management practices intended to reduce fire risk. In particular, tree thinning increases both understorey plant diversity and biomass, but does not lead to recruitment of species that are typical of native forests. Rates of native forest succession appear to be slow in this semi-arid Mediterranean ecosystem. Current pine plantation management practices, while useful for increasing understorey biomass and plant diversity will need to be coupled with additional restoration techniques (e.g. seeding and transplants) to recover species composition and structure of native forests.

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Section: Discussionmentioning

confidence: 68%

Stand management to reduce fire risk promotes understorey plant diversity and biomass in a semi‐aridPinus halepensisplantation

Jiménez

Spotswood²,

Cañadas

et al. 2014

Applied Vegetation Science

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“…Radicle and hypocotyl elongation were clearly inhibited at a higher concentration of needle extracts, comparable to other studies, such as Carduus nutans on pasture plants in New Zealand (Wardle et al 1991), Artemisia princeps var. orientalis (Kil and Kyeong 1992), Medicago arborea (Bousquet-Melou et al 2005), Pinus halepensis (Alrababah et al 2009). The reduction in growth of radicle and hypocotyl of the target species when treated with aqueous extracts of both concentrations suggests P. pinea's allelopathic potential.…”

Section: Discussionmentioning

confidence: 99%

Effects of Pinus pinea litter on seed germination and seedling performance of three Mediterranean shrub species

2012

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Pinus pinea L. is a coniferous tree inhabiting the Mediterranean Basin, which appears widely distributed in the Iberian Peninsula, frequently associated to Mediterranean shrub species, such as Cistus salvifolius L., C. libanotis L. and Halimium halimifolium (L.) Willk.(Cistaceae). This study investigated the effects (chemical and physical) of P. pinea needles on the seed germination and early growth of these three shrub species. Laboratory experiments were carried out in order to assess an expected negative effect by using different treatments to seeds (physical layer and two aqueous extracts concentrations). Seed germination of all species was inhibited when treated with aqueous extracts and the degree of inhibition was higher when using the extract with the highest concentration, while no effect was observed with the physical layer treatment. Seedling performance was also sensitive to the different treatments, showing the most stressed values with the high concentration extract. The results from this study highlight the importance of allelopathy of P. pinea needles as a mechanism for controlling seed germination and seedling performance of some Mediterranean shrub species.

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“…The results of this trial has showed that the aerial parts of H. rhomboidea existed allelopathy effect. Many studies have shown that the different parts of same plant has the different allelopathy effect, which might be relevant with the different kinds and contents allelochemicals [10][11]. According to the literature reports [12][13][14]: The common allelochemicals were as fellows: Water soluble organic acid, aliphatic alcohols, aliphatic series, aldehyde, ketone, simple unsaturated lactone, long chain fatty acid, acetylene, quinone compounds, simple phenols, benzoic acid and its derivatives, cinnamic acid and its derivatives, coumarin, flavonoids, tannins, terpenoids, steroids, amino acids, peptides, alkaloids, cyanohydrin together, sulfide, sulfur, nucleotides.…”

Section: Results and Discussmentioning

confidence: 99%

Seed-Germination and Seedling-Growth Inhibition by Aqueous Extracts from Hyptis Rhomboidea

Wang¹,

Deng²,

Tang³

et al. 2015

Proceedings of the 2015 International Conference on Industrial Technology and Management Science

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Allelopathic effects of Pinus halepensis and Quercus coccifera on the germination of Mediterranean crop seeds

Cited by 28 publications

References 22 publications

Stand management to reduce fire risk promotes understorey plant diversity and biomass in a semi‐aridPinus halepensisplantation

Stand management to reduce fire risk promotes understorey plant diversity and biomass in a semi‐aridPinus halepensisplantation

Effects of Pinus pinea litter on seed germination and seedling performance of three Mediterranean shrub species

Seed-Germination and Seedling-Growth Inhibition by Aqueous Extracts from Hyptis Rhomboidea

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