The allelopathic effects of <i>Amaranthus</i> on seed germination, growth and development of vegetables

Prinsloo, Gerhard; Plooy, C.P. Du

doi:10.1080/01448765.2018.1482785

Cited by 10 publications

(9 citation statements)

References 29 publications

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“…These results were supported by the findings of [3] who reported that Amaranthus viridis extract significantly decreases the germination of mung bean (Vigna radiata (L.) R. Wilczek). Similar results were reported by [4] they found that the extracts of the whole plant of Amaranthus exhibited severe inhibition of seed germination of tomato as well as of weed seeds of Conyza bonariensis. Also [ 5]) concluded that leaf leachates of Amaranthus viridis, Parthenium hysteroporus and Polygonum plebeinum significantly inhibited the growth of Triticum aestivum.…”

Section: Resultssupporting

confidence: 88%

Allelopathic effects of Amaranthus viridis L. on some growth characters of Swiss chard plant (Beta vulgaris var. Cicla))

Osman¹,

Mutwali²

2022

World J. Bio. Pharm. Health Sci.

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A pot experiment was conducted at Faculty of Education, Alzaiem Alazhari University, Sudan, during 2019/2020 to evaluate the effect of Amaranthus viridis powder on the emergence and growth of Swiss chard (Beta vulgaris var. cicla). The experiment was set as a completely randomized design (CRD) with four replicates. In the treatments the powder of Amaranthus viridis was incorporated into the soil at rate of (0, 0.5, 1.0. 1.5 and 2.0% w/w) representing T1 (control), T2, T3, T4 and T5 respectively. Results indicated that Amaranthus viridis powder decrease germination, plant height, number of leaves, leaf area, shoot and root fresh and dry weight, chlorophyll content (a, b) and some chemical elements (P, Ca, Mg, Fe) of Swiss chard (Beta vulgaris var. cicla).

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Section: Resultssupporting

confidence: 88%

Allelopathic effects of Amaranthus viridis L. on some growth characters of Swiss chard plant (Beta vulgaris var. Cicla))

Osman¹,

Mutwali²

2022

World J. Bio. Pharm. Health Sci.

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“…Germination potential decreased for all cover crop species exposed to A. hybridus tea extract treatments. These results agree with those obtained for A. retroflexus leaf extracts on garden cress (Lepidium sativum L.) [31] and maize (Zea mays L.) [32]. In our germination experiment, alfalfa and red clover were both negatively affected by increasing tea concentration.…”

Section: Discussionsupporting

confidence: 92%

“…Our experiments were conducted under controlled conditions in the greenhouse. Red amaranth (Amaranthus cruentus L) extracts reduce tomato and cabbage seed germination in pot trials, but not in field trials [44]. This is likely due to confounding effects of other environmental conditions and potential interactions with other plant species and even soil microorganisms in the field.…”

Section: Discussionmentioning

confidence: 99%

Impacts of Smooth Pigweed (Amaranthus hybridus) on Cover Crops in Southern Ontario

2020

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Amaranthus hybridus is a noxious weed in Ontario, with demonstrated allelopathic properties that can lead to decreased agricultural production. We tested the germination and growth of five cover crop species exposed to A. hybridus extracts, and to dried or fresh materials in soil. A germination index was calculated, and the dry weight of plant organs were measured to quantify responses to treatments. All species had reduced germination (≤29%) in 100% extract. Trifolium pratense had significant root weight reductions in extract (52%) and dried (72%) treatments, whereas shoot weight only decreased (48%) in dried treatment. Medicago sativa shoot weight decreased (52%) in 20g fresh treatment, while root weight decreased (62%) in dried treatment. Shoot weight of Raphanus sativus increased (32%) at mid-extract concentrations, while root weight increased (33%) only with dried treatment; however, both its shoot and root weight decreased (>40%) in fresh treatment. Only the shoot weight of Lolium multiflorum increased (41% in 75% extract and 55% in dried treatment). Both Cichorium intybus shoot and root weights decreased (~50%) in fresh treatment. Crop responses to A. hybridus are complex, and material and species-dependant. Further testing in the field may provide a more comprehensive understanding of how to improve the management of A. hybridus.

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“…In many allelopathic studies, high concentrations of extracts generally have an inhibitory effect on seed germination and seedling growth (Rice, 1984;Synowiec & Nowicka-Połeć, 2016). Prinsloo and Du Plooy (2018) have also suggested that the allelopathic effect depends on the concentration and type of test species. For example, these authors reported that high concentrations of Amaranthus extracts significantly inhibited tomato seed germination; however, at low concentrations no such effect was observed.…”

Section: Discussionmentioning

confidence: 99%

Allelopathic Effect of Lamiaceous Weeds on Seed Germination and Early Growth of Aromatic Rice (Oryza sativa ‘Gobindobhog’)

Oraon

Mondal

2021

Acta Agrobot

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The present study reveals the allelopathic effect of aqueous leaf and root extracts of Hyptis suaveolens (L.) Poit. and Leucas cephalotes (Roth) Spreng. on seed germination and early growth of Oryza sativa ‘Gobindobhog.’ Leaf and root extracts at different concentrations (0.5%, 1%, 2.5%, 4%, and 5%) were used to study the effect in laboratory-based experiments. After 5 days of incubation, seed germination and root and shoot length of rice seedlings were measured, and both H. suaveolens and L. cephalotes showed allelopathic effects on seed germination and growth parameters. Hyptis suaveolens showed a more pronounced effect at 5% concentration of aqueous leaf and root extracts than L. cephalotes . The inhibitory effects were as follows: root length > seed germination > shoot length. Both H. suaveolens and L. cephalotes impede seed germination and early growth of rice by releasing water-soluble allelochemicals from their leaves and roots.

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The allelopathic effects of Amaranthus on seed germination, growth and development of vegetables

Cited by 10 publications

References 29 publications

Allelopathic effects of Amaranthus viridis L. on some growth characters of Swiss chard plant (Beta vulgaris var. Cicla))

Allelopathic effects of Amaranthus viridis L. on some growth characters of Swiss chard plant (Beta vulgaris var. Cicla))

Impacts of Smooth Pigweed (Amaranthus hybridus) on Cover Crops in Southern Ontario

Allelopathic Effect of Lamiaceous Weeds on Seed Germination and Early Growth of Aromatic Rice (Oryza sativa ‘Gobindobhog’)

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