Study of Bioassay the Allelopathical Effect of Neem (Azadirachta indica) n-hexane, Acetone and Water-soluble Extracts on Six Weeds

Ashrafi, Z. Y.; Sadeghi, Seyed Mohammad Moein; Alizade, H.; Mashhadi, H R Rahimian; Mohamadi, Ebrahim R.

doi:10.5539/ijb.v1n1p71

Cited by 12 publications

(9 citation statements)

References 20 publications

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“…Allelochemicals activity of plants is measured by the sensitivity of roots in the bioassay. The findings are in connection with previous studies reporting that effectiveness of receiver plants to allelochemical was concentration dependent of inhibitory principles with a confirmation threshold (Ashrafi et al, 2009). Furthermore, the permeability of allelochemicals to root tissue was notable to be greater than that to shoot tissue (Nishida et al, 2005).…”

Section: Resultssupporting

confidence: 89%

Allelopathic Potential of Aqueous Extracts of Various Parts of Plumbago zeylanica L. on Germination and Seedling Growth of Andrographis paniculata Nees.

Alagesaboopathi¹

2016

Int. J. Curr. Res. Biosci. Plant Biol.

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A b s t r a c t A r t i c l e I n f oThe present study was conducted to investigate the allelopathic potential of Plumbago zyelanica L. which showed inhibitory effects on seed germination, root length and shoot length of medicinal plant Andrographis paniculata Nees. Leaf, stem and root aqueous extracts of P. zeylanica at 5%, 10%, 15%, 20% and 25% concentration were applied to determine their effect on seed germination and seedling growth of A. paniculata under laboratory conditions. Results notable that seed germination, root length, shoot length, fresh weight and dry weight of A. paniculata were significantly decreased by leaf, stem and root extracts compared with control treatments. Roots were large affected than shoots. Root extracts was more reduced than leaf and stem extract. These outcomes revealed that the inhibitory and stimulatory effect potentialities may be due to the presence of these allelochemicals like alkaloids, tannins, phenols, terpenoids and steroids etc. in the aqueous leaf, stem and root extracts of P. zeylanica from the present investigation.

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Section: Resultssupporting

confidence: 89%

Allelopathic Potential of Aqueous Extracts of Various Parts of Plumbago zeylanica L. on Germination and Seedling Growth of Andrographis paniculata Nees.

Alagesaboopathi¹

2016

Int. J. Curr. Res. Biosci. Plant Biol.

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“…Extent of soil pollution can be evaluated by chemical analyses directly or even indirectly by estimation of phytotoxicity levels using fast germinating plant systems for screening potential phytoremediators and for assessing the progress of phytoremediation in the field itself. Bioassays using fast germinating seeds have been widely used to study the inhibitory effects of alterations in various matrices (Gariglio et al 2002;Araujo and Monteiro 2005;Ashrafi et al 2009). A large number of studies have been carried out with different plant species such as cucumber, cress (Helfrich et al 1998), lettuce, and soybean (Gundersson et al 1997) etc.…”

Section: Introductionmentioning

confidence: 99%

Bioassay as monitoring system for lead phytoremediation through Crinum asiaticum L.

Varun¹,

D’Souza²,

Kumar

et al. 2010

Environ Monit Assess

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Toxicity of lead in soil is well documented and established. Phytoremediation has gained attention as a cheap, easily applicable, and eco-friendly clean-up technology. Chemical methods are used to assess exact levels and type of pollutants but heavy metal content in soil can also be evaluated indirectly by estimation of phytotoxicity levels using bioassays. Plant bioassays through fast germinating cereals can indicate not only the level of pollution and its effects on growth and survival but also the progress of phytoremediation process. The performance of barley Hordeum vulgare L. seedlings as bioassay for assessment of changes in the levels of lead (Pb) at three concentrations, i.e., 300 (T(1)), 600 (T(2)), and 1,200 ppm (T(3)) in the soil was evaluated while testing the efficiency of Crinum asiaticum L. as a phytoremedial tool. At the first assessment, i.e., 30 DAT (days after treatment) shoot and root lengths of seedlings decreased with increasing concentrations of Pb. As the study progressed, a decrease in levels of Pb was accompanied by better germinability and growth of barley. At 120 DAT seedling growth in all the treatments were comparable to control. In T(1), T(2), and T(3) soils, 74.5%, 83.7%, and 91.2% reduction in lead content was observed at 120 DAT. Highly significant correlations between decreasing pollutant (Pb) content in the soil, seed germination, and seedling growth of barley H. vulgare were found. The differences in root and shoot length as well as overall growth pattern are indicative of the suitability of barley as a bio-monitoring tool.

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“…The need to reduce harmful environmental effects from the overuse of herbicides has encouraged the development of weed management systems which are dependent on ecological manipulations rather than agrochemicals (Liebman and Ohno, 1997;Zoheir et al, 2008;Ashrafi et al, 2009). However, few studies were conducted on the leaf extract of Vitellaria paradoxa.…”

Section: Introductionmentioning

confidence: 99%

Growth Response of Three Leafy Vegetables to the Allelopathic Effect of <i>Vitellaria paradoxa</i>

et al. 2015

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This study was conducted to evaluate the growth response of three leafy vegetables (Celosia argentea, Amaranthus cruentus and Amaranthus hypochodriacus) to the leaf extract of Vitellaria paradoxa. Forty-five (45) experimental plastic containers were filled with 5 kg of loamy soil each and randomly allocated to the following regimes: control, 20 g, 40 g, 60 g and 80 g of powdered leaves of V. paradoxa, in three (3) replicates for each test crop respectively. It was observed that the response of the three leafy vegetables, grown within different composition of V. paradoxa leaves, are concentration dependent with respect to the studied growth parameters (plant height, leaf number, leaf area, stem girth). This indicated that V. paradoxa has allelopathic potential on the studied vegetables and therefore it could be used for natural weed control.

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Study of Bioassay the Allelopathical Effect of Neem (Azadirachta indica) n-hexane, Acetone and Water-soluble Extracts on Six Weeds

Cited by 12 publications

References 20 publications

Allelopathic Potential of Aqueous Extracts of Various Parts of Plumbago zeylanica L. on Germination and Seedling Growth of Andrographis paniculata Nees.

Allelopathic Potential of Aqueous Extracts of Various Parts of Plumbago zeylanica L. on Germination and Seedling Growth of Andrographis paniculata Nees.

Bioassay as monitoring system for lead phytoremediation through Crinum asiaticum L.

Growth Response of Three Leafy Vegetables to the Allelopathic Effect of <i>Vitellaria paradoxa</i>

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