Allelopathy Journal Impact Factor & Information

Publisher: International Allelopathy Foundation (Hisar, India)

Journal description

Current impact factor: 0.58

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 0.578
2012 Impact Factor 0.685
2011 Impact Factor 0.846
2010 Impact Factor 0.635
2009 Impact Factor 0.793
2008 Impact Factor 0.525
2007 Impact Factor 0.672
2006 Impact Factor 0.48
2005 Impact Factor 0.686
2004 Impact Factor 0.354
2003 Impact Factor 0.52
2002 Impact Factor 0.514

Impact factor over time

Impact factor

Additional details

5-year impact 0.62
Cited half-life 5.10
Immediacy index 0.18
Eigenfactor 0.00
Article influence 0.11
Other titles Allelopathy Journal
ISSN 0971-4693
OCLC 32335245
Material type Periodical
Document type Journal / Magazine / Newspaper

Publications in this journal

  • Allelopathy Journal 07/2015; 36(1):109-122.
  • Allelopathy Journal 01/2015; 35(2):217-226.
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    ABSTRACT: In this study, phenolic acids in soils used for the continuous cropping of strawberry (Fragaria x ananassa Duch.) for different years were investigated. The effects on plant growth and root activity, superoxide dismutase activity and malondialdehyde content of strawberry plants at different phenolic acid levels were also determined in simulation field experiments, in which exogenous phenolic acids were added to potted soils. The p-hydroxybenzoic acid, ferulic acid, cinnamic acid and p-coumaric acid were the main phenolic acids detected in the soils used for the continuous cropping of strawberry. Phenolic acids content in the soil increased with the increase in the duration of continuous cropping. Each phenolic acid at lower concentrations stimulated the length and dry weight of shoots and roots, root activity and superoxide dismutase activity of strawberry plants but contrarily, these parameters were inhibited at higher concentrations. All concentrations of phenolic acid mixture also inhibited these parameters. The increase in concentrations of each phenolic acid decreased the malondialdehyde content initially and then increased, but the increase in the phenolic acids mixture concentration increased the malondialdehyde content. This study indicated that phenolic acids may be implicated in the autotoxicity of strawberry, they influence the plant growth and physiological characteristics. Furthermore, these effects were concentration and synergy dependent.
    Allelopathy Journal 01/2015; 35(1):61-75.
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    ABSTRACT: Cucumber seedlings grown in soil were treated with different concentrations of vanillin (0.02-0.2 mu mol/g soil). The rhizosphere soil bacterial and fungal community structures and their abundances were analyzed by PCR-denaturing gradient gel electrophoresis (DGGE) and quantitative PCR, respectively. The vanillin at 0.1 and 0.2 mu mol/g soil significantly reduced the cucumber seedling biomass. All concentrations of vanillin increased the abundances of soil bacteria and fungal communities but decreased the bacteria-to-fungi ratio. Vanillin changed the soil bacterial and fungal community structures, decreased the richness, evenness and diversity indices of soil bacterial community but increased that of fungal community. Principal component analysis showed that the fungal community structure was dependent on the vanillin concentration, however, 4-concentrations of vanillin (0.02-0.2 mu mol/g soil) had similar bacterial community structure. This study showed that vanillin changed the soil microbial communities and that bacterial and fungal communities responded differently to exogenous vanillin.
    Allelopathy Journal 01/2015; 35(1):49-59.
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    ABSTRACT: Replant problem is a serious production constraint in continuously cropped Lanzhou lily (Lilium davidii var. unicolor), an edible bulb lily. However, relatively little is known about the autotoxins that cause replant problems of lily. Autotoxins from root exudates of lily were collected using XAD-4 resin, analyzed by GC-MS and quantified in soil by HPLC. Radicle growth of lettuce was significantly inhibited by lily root exudates and the degree of inhibition increased with increasing concentration of exudates. In the most phytotoxic fraction, most of the compounds were phenolic and aliphatic acids and phthalic acid was dominant. The identified phytotoxic allelochemicals were phthalic, adipic, palmitic, oleic and stearic acids. In in vitro tissue culture assay of lily. phthalic and adipic acids were very autotoxic to lily. As the number of years of continuous lily monoculture increased, so did the concentrations of phthalic acid in soil (from 9.73 to 27.73 mu g.g(-1) dry soil, after 3 years cropping). It was concluded that phthalic acid was released in large quantities from roots and accumulated in soil with the increase in duration of monoculture. Phthalic acid may be one of the major factors causing replant problem in lily.
    Allelopathy Journal 01/2015; 35(1):35-48.
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    ABSTRACT: The effects of myristic acid, palmitic acid and dibutyl phthalate found in the root exudates of grafted eggplant and non-grafted eggplants were investigated on the number of Verticillium dahliae and its antagonistic microbes in the rhizosphere of eggplants. These chemicals significantly increased the number of antagonistic microbes and also inhibited the multiplication of V. dahliae in the eggplant rhizosphere. The inhibitory effect of these three chemicals on V dahliae was highest (RI=0.178) at 0.05 0.5 and 5 mmol.L-1 concentrations, respectively. There was a significant negative correlation between the antagonistic microbes and V. dahliae in the eggplant rhizosphere. There was hoever a close relationship between the component changes in the root exudates of eggplant and the antagonistic microbes in the rhizosphere. The allelochemical contents and their interactions influenced the intensity of allelopathic effect.
    Allelopathy Journal 01/2015; 35(1):23-34.
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    ABSTRACT: Identifying the mechanisms underlying invasion success is important for our understanding of why some exotic plants negatively impact the biodiversity and functioning of only certain ecosystems. Allelopathy is one potential mechanism of invasion in which invasive plants produce secondary compounds (allelochemicals) that inhibit the growth of nearby organisms. Thymus vulgaris an aromatic perennial, endemic to the western Mediterranean, which in its native range affects other species via allelopathy, but overall appears to facilitate native diversity. Thymus vulgaris has invaded thousands of hectares of Central Otago, southern New Zealand where it grows at high densities in relatively monocultural communities in which native species are less common than exotic species. We examined the effects of soil collected from under thyme and from away from thyme, from both north- and south-facing slopes, on the germination and seedling biomass of three common exotic (Bromus diandrus Roth, Dactylis glomerata L and Vulpia myuros (L.) C.C.Gmel. var. megalura (Nutt.) Auquier) and two common native (Anthosachne aprica (A.Love et Connor) C.Yen et J.L.Yang, Poa colensoi Hook.f.) thyme-associated grass species. We detected small quantities of the allelochemicals thymol and carvacrol in soil under thyme. Soil from under thyme had no effect on germination rates or seedling growth for either native or exotic grasses. Native grasses had inherently lower germination rates and seedling biomass than exotic grasses, and these differences between natives and exotics were the most striking in our results.
    Allelopathy Journal 01/2015; 35(1):139-152.
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    ABSTRACT: Two phytotoxic xanthanolides, xanthinin and xanthatin, were isolated from the leaves and fruits of invasive weed, Xanthium italicum Morretti, commonly known as Italian cocklebur. They slightly inhibited the seedling growth of Italian cocklebur, but were very inhibitory to lettuce, ryegrass and two indigenous species (African rue and redroot pigweed). Xanthinin significantly decreased the growth of lettuce (Lectuca sativa L.), ryegrass (Lolium multiforum Lam.), Syrian me (Peganum harmala L.) and redroot pigweed (Amaranthus retroflexus L.) even at low concentration (10 mu g/mL). In contrast, the root length of Italian cocklebur slightly inhibited (2%) compared to control at 50 mu g/mL xanthinin treatment. The application of xanthatin also inhibited the growth of receiver plants. Ryegrass and Syrian rue were most sensitive species, whose root growth was inhibited by 78% and 96%, respectively, at 50 mu g/mL dose of xanthatin, while the root length of Italian cocklebur was only inhibited by 23%. In fact, Italian cocklebur was the only receiver species that survived at 1 mg/mL xanthatin and xanthinin treatment. Our results suggested that the selective phytotoxicity of Italian cocklebur and other species facilitated its successful invasion. This is the first report on the phytotoxic activity of xanthatin.
    Allelopathy Journal 01/2015; 35(1):77-86.
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    ABSTRACT: We studies the seasonal dynamics of phenolics in leaves, litter and soil of the dominant host tree oak (Quercus robur L.) growing with ectomycorrhizal fungi truffles (T. macrosporum) in oak forest (Fraxino angustifoliae-Quercetum roboris Joy. et Tomic 1979) near River Danube, near Belgrade. In litter, the highest content of free phenolics was in April (primordial growth period of truffles) and bound phenolics in August (truffles ripening- start of harvest). Due to intensive decomposition of forest litter during the vegetative growth period, free phenolic acids increased and the bound phenolic acids decreased. There was reduction in ratio of bound cinnamic to benzoic acids, it indicated the microbial degradation of lignin and the transformation of cinnamic derivatives into benzoic acid derivatives. In the top soil layer, where the majority of truffle fruit bodies were found (28.31 kg/ha/year). the free phenolics (direct influence on truffle growth and development) contents were up to 58.36 mu g/g. As the mycelia and fruit bodies of truffle grow in phenolic-rich forest soil, hence, we assumed that the truffle is well-adapted to high phenolics content.
    Allelopathy Journal 01/2015; 35(1):109-128.
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    ABSTRACT: We determined the effects of aqueous extracts of decomposing tomato (Solanum lycopersicum) plant parts, its root exudates and aqueous extract of soil from the continuously tomato cropped field soil on seed germination and seedling growth of tomato. It was found that all the extracts inhibited both germination and seedling growth to varying levels and the inhibition was concentration dependant. The HPLC analysis of plant part extracts and the root exudates for various phenolics, showed that they contained the phenolic compounds with allelopathic properties. The inhibition of seed germination and plant growth, therefore, appeared to be due to these phenolics allelochemcials in the tomato plants.
    Allelopathy Journal 01/2015; 35(1):1-10.
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    ABSTRACT: In field studies, we evaluated the combinations of sunflower (Helianthus annus) extract and reduced doses of herbicide pendimethalin to control Chenopodium album in corn field. The experimental treatments were: control, pendimethalin full dose (600 mL ha(-1)), pendimethalin half dose (300 mL ha(-1)), sunflower extracts (10 and 20%), pendimethalin half dose + 10% sunflower extract and pendimethalin half dose + 20% sunflower extract. Combinations of sunflower extract (20%) with pendimethalin half dose, drastically decreased the C. album density and seedling weight (81.3% and 82.8% inhibition over control) than other treatments except pendimethalin full dose. The minimum LAI of C. album was with pendimethalin full dose (75.5 %) and pendimethalin half dose + 20% sunflower extract (71 %). Pendimetalin full dose and pendimethalin half dose + 20% sunflower extract decreased the photosynthesis to 59% and 55% of control, respectively. All treatments increased the ABA contents in C. album seedling, but the highest ABA content was with pendimethalin full dose (74.7%) and pendimethalin half dose + 20% sunflower extract treatments (75.4 % over the control). We concluded that the phytotoxic effects of sunflower extract tank mix with pendimethalin could reduce the herbicide doses for C. album control.
    Allelopathy Journal 01/2015; 35(1):97-107.
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    ABSTRACT: We studied the Mikania micrantha wilt virus and found that this wilt virus inhibited the growth of M. micrantha. The MMWV did not infect the 15 plants species from 11 families (neighboring plants of M. micrantha). The MMWV infection did not change the allelopathic potential of leaf aqueous leachates and dried leaf litter of M. micrantha. Chemical composition of leachates obtained from healthy and MMWV-infected leaves of M. micrantha was investigated by GC-MS. Twenty-two components were identified and the MMWV infection significantly changed their contents. When MMWV was present, the floret numbers of M. micrantha significantly decreased from 11862/0.25 m(2)to 2334/0.25 m(2) and seed production from 3060/0.25 m(2)to 716/0.25 m(2). These results indicated that MMWV could be used as a biocontrol agent against M. micrantha.
    Allelopathy Journal 01/2015; 35(1):87-96.
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    ABSTRACT: Phytotoxic effects of aqueous extracts of leaf (control (CK), 0.5, 1, 2, 4 and 8 %, w/v) and root exudates (CK, 10d, 20d, 30d, 40d, 50d) of Capsicum annuum were studied under laboratory condition on seed germination and seedling growth of 6 test vegetable crops [Hot pepper (Capsicum annuum L.),- tomato (Lycopersicon esculentum Mill.), cucumber (Cucumis sativus L.), radish (Raphanus sativus L.), pumpkin (Cucurbita moschata Duch.) and lettuce (Lactuca saliva L.)]. Both aqueous extracts and root exudates inhibited the seed germination and seedling growth of lettuce, and their inhibitory effects increased with increasing concentration and increase in the duration of cultivation time. In aqueous extracts of leaves and root exudates of C. annum, 28-compounds (alkanes, phthalate ester, phenols anilines and carboxylic acid) were isolated and identified by GC and GC-MS. The bioactivity of 15-suspected allelochemicals were studied on seed germination and seedling growth of Lactuca sativa. Two main inhibitory substances, N-phenyl-2-naphthylamine, phthalic acid, were found as potential allelochemicals of Capsicum annuum, with inhibitory effects on seed germination and seedling growth of lettuce. Both N-phenyl-2-naphthylamine, phthalic acid, showed separate and synergetic potential allelopathic effects.
    Allelopathy Journal 01/2015; 35(1):11-22.