Allelopathic Effect of Pluchea lanceolata (Asteraceae) on Characteristics of Four Soils and Tomato and Mustard Growth

Inderjit, Inderjit; Dakshini, K. M. M.

doi:10.2307/2445760

Cited by 53 publications

(25 citation statements)

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“…Ismail and Chong (2002) reported allelopathic effects of aqueous extracts of Mikania leaves on Brassica chinensis L. and Lycopersicon esculentum and identified four phenolic compounds, caffeic acid, resorcinol, p-hydroxybenzaldehyde, and vanillic acid from aqueous leaf extracts of Mikania. Several studies have reported growth suppression of plant seedlings due to higher amounts of phenolics in plant leachates (Inderjit 1994;Kaushik and Inderjit 2007). The observed effects, however, were obviated when seedlings were grown in sterile soil treated with Mikania leaf leachate, suggesting involvement of soil microbes in expression of the allelopathic activities of Mikania leaf leachate.…”

Section: Discussionmentioning

confidence: 99%

Effects of invasion of Mikania micrantha on germination of rice seedlings, plant richness, chemical properties and respiration of soil

2011

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Mikania micrantha, a creeper and climber, has invaded forests and agricultural areas in the Western Ghats. A quantification of the effect of Mikania on species richness and factors that contribute to its success would help to understand the invasion success of Mikania in the Western Ghats of India. This study investigated its impact on species richness and factors that contribute to its invasion success. Impact of Mikania on species richness was studied in areas invaded by Mikania and not yet invaded by Mikania by quadrat (1×1 m 2 ) method. Growth experiments were carried out with Mikania rhizosphere soil and soil treated with Mikania leaf leachate. Chemical characteristics such as electrical conductivity, organic matter, extractable P, total organic N and water-soluble phenolics, and microbial respiration of soil invaded by Mikania and not yet invaded by Mikania were measured. We observed lower species richness in areas invaded by Mikania compared to areas not yet invaded by Mikania. Seedling growth was suppressed in Mikania rhizosphere soil or soil treated with higher levels of Mikania leaf leachate. Higher levels of organic matter, total organic N and watersoluble phenolics, and lower microbial activity were observed in Mikania rhizosphere soil. Soil treated with Mikania leaf leachate has higher amounts of watersoluble phenolics. Mikania invasion appears to reduce plant species richness in the Western Ghats, and discourage seedling growth of certain plant species. Factors that are likely to contribute to Mikania success are its ability to pre-empt light and alter soil chemistry and biochemistry in ways that benefit the species.

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Section: Discussionmentioning

confidence: 99%

Effects of invasion of Mikania micrantha on germination of rice seedlings, plant richness, chemical properties and respiration of soil

2011

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“…The distinction between dicotyledonous and monocotyledonous species was less clear in shoot and root tests than in germination tests. Plant-to-plant interference is a complex combination of competition for resources such as light, nutrients and water, and allelopathic reaction (Fuerst & Putnam, 1983;Qasem & Hill, 1989), and distinguishing allelopathic effects from the competitive interference is diffcult (Leather & Einhelling, 1988;Inderjit & Dakshini, 1994). However, the seedlings of each test species used in these experiments were grown in a single Petri dish without intraspecies competition for resources, as young seedlings withdraw nutrients from the seeds and light is unnecessary in the developmental stage (Fuerst & Putnam, 1983).…”

Section: Activity On Germinationmentioning

confidence: 99%

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

Ashrafi¹,

Sadeghi²,

Alizade³

et al. 2009

IJB

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Azadirachta indica, or Neem Tree, is an evergreen tree native to Southeast Asia. All parts of the tree have been used medicinally for centuries. The allelopathic potential of extracts of Azadirachta indica L., which is one of the most dominant weeds in tropical regions of South-west Asia, was investigated under laboratory conditions. The n-hexanesoluble, acetone-soluble and water-soluble fractions obtained from the acetone extract of A. indica shoots inhibited the germination and the growth of roots and shoots of six test plant species. The inhibitory activity of the water-soluble fraction was greatest, followed by that of the n-hexane-soluble and acetone-soluble fractions in all bioassays. Significant reductions in the germination and growth of the roots and hypocotyls were observed as the extract concentration increased. The concentration-dependent responses of the test plants to the fractions suggested that all three fractions might contain allelochemicals, but that the greatest potential was in the water-soluble fraction. These Vol. 1, No. 1 International Journal of Biology 72results indicate that A. indica may produce potent allelochemicals, which should be investigated further in the laboratory and the field.

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“…Growth assays performed with exudates or leachates containing complex mixtures cannot generally be simulated by utilizing single chemicals or simple mixtures of chemicals. Many of the components of root exudates and/or foliar leachates in natural systems influence both organic and inorganic components of the soil (Inderjit & Dakshini 1994a, 1994b. Growth responses due to allelochemicals could be due to their direct effects, the direct effects of their degradation byproducts or to the influence of some or all of these compounds on soil edaphic factors (Inderjit & Weiner 2001).…”

Section: Introductionmentioning

confidence: 99%

Challenges, achievements and opportunities in allelopathy research

Inderjit

Weston

Duke³

2005

Journal of Plant Interactions

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Allelopathy is defined as the suppression of any aspect of growth and/or development of one plant by another through the release of chemical compounds. Although allelopathic interference has been demonstrated many times using in vitro experiments, few studies have clearly demonstrated allelopathy in natural settings. This difficulty reflects the complexity in examining and demonstrating allelopathic interactions under field conditions. In this paper we address a number of issues related to the complexity of allelopathic interference in higher plants: These are: (i) is a demonstrated pattern or zone of inhibition important in documenting allelopathy? (ii) is it ecologically relevant to explain the allelopathic potential of a species based on a single bioactive chemical? (iii) what is the significance of the various modes of allelochemical release from the plant into the environment? (iv) do soil characteristics clearly influence allelopathic activity? (v) is it necessary to exclude other plant interference mechanisms?, and (vi) how can new achievements in allelopathy research aid in solving problems related to relevant ecological issues encountered in research conducted upon natural systems and agroecosystems? A greater knowledge of plant interactions in ecologically relevant environments, as well as the study of biochemical pathways, will enhance our understanding of the role of allelopathy in agricultural and natural settings. In addition, novel findings related to the relevant enzymes and genes involved in production of putative allelochemicals, allelochemical persistence in the rhizosphere, the molecular target sites of allelochemicals in sensitive plant species and the influence of allelochemicals upon other organisms will likely lead to enhanced utilization of natural products for pest management or as pharmaceuticals and nutraceuticals. This review will address these recent findings, as well as the major challenges which continue to influence the outcomes of allelopathy research.

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Allelopathic Effect of Pluchea lanceolata (Asteraceae) on Characteristics of Four Soils and Tomato and Mustard Growth

Cited by 53 publications

References 0 publications

Effects of invasion of Mikania micrantha on germination of rice seedlings, plant richness, chemical properties and respiration of soil

Effects of invasion of Mikania micrantha on germination of rice seedlings, plant richness, chemical properties and respiration of soil

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

Challenges, achievements and opportunities in allelopathy research

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