Proving Allelopathy in Crop–Weed Interactions

Duke, Stephen O.

doi:10.1614/ws-d-13-00130.1

Cited by 101 publications

(90 citation statements)

References 55 publications

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“…Several preliminary approaches have been developed such as growing the receiver plant with plant residues or watering the receiver plant with leaf leachate (Duke, 2015). However, the previous preliminary studies need extraction procedure, and suitable for a small number of samples.…”

Section: Introductionmentioning

confidence: 99%

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Mukaromah

Purwestri

Fujii

2017

Indones. J. Biotechnol.

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The sandwich method is a reliable screening bioassay that can be utilized to investigate allelopathic activity of leaf litter leachates. Screening the allelopathic potential of mahogany (Swietenia macrophylla King) leaf litter in plant-plant interaction using the sandwich bioassay method has not been reported. The research objectives were to determine and categorize allelopathic potential of S. macrophylla leaf litter using the sandwich bioassay method, and to determine specific activity (EC 50 ) of S. macrophylla leaf litter. The results showed that S. macrophylla leaf litter exhibited strong allelopathic activity when compared with 46 leaf litter species and was included in the top ten of allelopathic leaf litter species. Increasing S. macrophylla leaf litter concentration was concomitant with inhibition of radicle lettuce seedling growth compared with the control. According to the linear regression analysis, the effective concentration (EC 50 ) of S. macrophylla was estimated to be 3.25 mg D.W. eq. mL 1 and was considered to have strong growth inhibitory activity on lettuce radicle elongation. The results suggest the possibility of allelopathic potential of leaf litter in plant-plant interaction under S. macrophylla trees.

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Section: Introductionmentioning

confidence: 99%

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Mukaromah

Purwestri

Fujii

2017

Indones. J. Biotechnol.

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“…These compounds are derived from the secondary metabolism of plants and can present new modes of action; thereby, generating bio-herbicides which are of great importance for use in agriculture (Bajwa et al, 2015;Duke, 2015). Allelopathic studies have received considerable attention in recent years as new cases of herbicide-resistant weeds increased all over the world (Duke, 2015;Goldfarb et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…These effects are mediated by substances belonging to different categories of compounds, originated from the secondary metabolism, such as terpenoids, steroids, alkaloids, cyanohydrins, long-chain fatty acids, polyacetylenes, unsaturated lactones, tannins, benzoic acid derivatives, phenols, coumarins and flavonoids (Duke, 2015;Nichols et al, 2015). Allelochemicals are water soluble; thus, can be extracted and applied by foliar sprays or in contact with the seed (Bajwa et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Allelopathic potential of Cymbopogon citratus over beggarticks (Bidens sp.) germination

Krenchinski¹,

Albrecht²,

Albrecht³

et al. 2017

Aust J Crop Sci

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Allelochemicals are important and innovative tools for weed control as they neither harm the environment nor increase weed management costs. The secondary metabolites can be extracted by water or soaking and later applied in soil or leaves. This study evaluated the leaf extracts of Cymbopogon citratus, affecting germination of Bidens pilosa and B. subalternans seeds. Two trials were conducted in germination chambers. The completely randomized design was employed in both trials with 5 replications. Trial one was arranged in a 2×3 double factorial design, with two periods of leave collection (morning and afternoon); and three extract preparations (aqueous extract by maceration, aqueous extract by infusion and control with distilled water). Trial two was set up in a 2×2×5 triple factorial design, with two extracts (aqueous extract by maceration, aqueous extract by infusion); two time of day collection (morning and afternoon) and five extracts concentrations (0; 25; 50; 75 and 100%). The means were compared by F and Tukey's test (p ≤ 0.05). To evaluate extracts concentrations a regression analysis was run. The results showed that the aqueous extract by maceration of C. citratus decreased germination and germination speed of Bidens pilosa and Bidens subalternans more than the aqueous extract by infusion, for both species. The concentrations interfered, inversely and proportionally, decreasing germination and germination speed. The germination of beggarticks was affected by the extracts of C. citratus, suggesting further studies for this plant.

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“…Based on the facts mentioned above, the first crucial step to determine the allelopathic potential of a plant is by field observation to see if one plant shows inhibitory or stimulatory effects against another. There are several clues that can indicate that a species is negatively allelopathic, for example, plant species that are particularly aggressive in their interactions with other species [6]. The next step may be the laboratory screening of active ingredients from an allegedly allelopathic plant, followed by laboratory testing to investigate the specific effects of the allelochemicals on the growth and development of other plants [7].…”

Section: Introductionmentioning

confidence: 99%

Allelopathic Effects of Aqueous Rhizome Extract of <i>Kaempferia galanga</i> on the Growth of Red Chilli (<i>Capsicum annuum</i>)

Lande¹

2016

PLANT

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Kaempferia galanga L showed an allelopathic clues when intercropping planted with coconut plants, however aspects related to allelochemicals of this plant and their inhibitory or stimulatory properties against other crop plants has not been investigated in earnest. This research was conducted in order to determine whether the crude extracts of kacholam have allelopathic properties, either negative or positive, against red chilies. By using completely randomized design, 25 chilli plantss were grouped into five consist of 5 plants each. Each plant was grown individually in a poly bag containing mixture of soil and compost in a ratio of 2:1. Group 1 is the chillies given 0% (v/v) kacholam extract as the control. Group 2, 3, 4 and 5 are the plants treated with kacholam rhizome extract at a concentration of 25%, 50%, 75% and 100% respectively. After being treated for one week the chillies are harvested and all the study parameters namely plant height, dry weight, and concentration of chlorophyll were assessed. The results showed, plant height of red chillies significantly suppressed by kacholam rhizome extract with a concentration of 50% or higher. The dry weight of red chillies was significantly decreased by treatment of kacholam rhizome extract in all level of concentration. However, crude water extract of kacholam plant rhizome showed no significant effects on the concentration of chlorophyll a as well as chlorophyll b. In conclusion, the crude extract kacholam plant rhizomes contains suppressive allelochemicals and, thus Kaempferia galanga is potential to be used as a negative, instead of positive, allelopathic crops.

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Proving Allelopathy in Crop–Weed Interactions

Cited by 101 publications

References 55 publications

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Allelopathic potential of Cymbopogon citratus over beggarticks (Bidens sp.) germination

Allelopathic Effects of Aqueous Rhizome Extract of <i>Kaempferia galanga</i> on the Growth of Red Chilli (<i>Capsicum annuum</i>)

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Proving Allelopathy in Crop–Weed Interactions

Cited by 101 publications

References 55 publications

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Determination of Allelopathic Potential in Mahogany (Swietenia macrophylla King) Leaf Litter Using Sandwich Method

Allelopathic potential of Cymbopogon citratus over beggarticks (Bidens sp.) germination

Allelopathic Effects of Aqueous Rhizome Extract of &lt;i&gt;Kaempferia galanga&lt;/i&gt; on the Growth of Red Chilli (&lt;i&gt;Capsicum annuum&lt;/i&gt;)

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Allelopathic Effects of Aqueous Rhizome Extract of <i>Kaempferia galanga</i> on the Growth of Red Chilli (<i>Capsicum annuum</i>)