Growth Stage of
            <i>Cyperus esculentus</i>
            Influences Its Allelopathic Effect on Ectomycorrhizal and Higher Plant Species

Reinhardt, C. F.; Bezuidenhout, Suzette Rene

doi:10.1300/j144v04n02_14

Cited by 10 publications

(4 citation statements)

References 16 publications

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“…However, their amount varies from one tissue to another . Leaves appear to be the most consistent source of chemicals involved in phytotoxicity, while fewer and less potent toxins occur in roots (Reinhardt and Bezuidenhout 2001). Different sensitivity of plant species to inhibitors substances depends on environmental conditions as well as physiological and biochemical characteristic of each specific species (Inderjit and Duke 2003;Kobayashi 2004).…”

Section: Introductionmentioning

confidence: 99%

Allelopathic activity of different plant parts of Peganum harmala L. and identification of their growth inhibitors substances

et al. 2009

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This study was conducted to evaluate the inhibitory potential of P. harmala leaf, stem and root extract on germination and growth of Avena fatua L. and Convolvulus arvensis L., as well as identification of the phytotoxic substances responsible for this activity. According to our results, the degree of toxicity of different P. harmala plant parts can be arranged in the following order: leaves [ stems [ roots. The two test species differed in their sensitivity to P. harmala extracts. Inhibitory effect on shoot length and seedling dry weight was more pronounced in C. arvensis, whereas higher reduction in germination, root length and total chlorophyll content occurred in A. fatua. A significant amount of water-soluble phenolic acids were found in P. harmala plant extracts. Total phenolic acids content was higher in leaf extracts when compared to that of stem or root extracts. Seven phenolic acids including gallic acid, vanillic acid, 4-hydroxybenzoic acid, 3,4-dihydroxybenzoic acid, caffeic acid, syringic acid and ferulic acid were found in P. harmala leaf extracts. On the other hand, we identified four phenolic acids from stem (galllic acid, vanillic acid, 3,4-dihydroxybenzoic acid and caffeic acid) and root (galllic acid, 4-hydroxybenzoic acid, syringic acid and cinnamic acid) extracts. The greater number of growth inhibitors detected in the leaves might explain the stronger inhibitory activity. Overall, our results suggest that P. harmala might be used as a natural herbicide for weed control and consequently reduce dependence on synthetic herbicides.

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Section: Introductionmentioning

confidence: 99%

Allelopathic activity of different plant parts of Peganum harmala L. and identification of their growth inhibitors substances

et al. 2009

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“…Leaves are the most stable source of autotoxic substances, with a strong autotoxic effect. However, only a few autotoxins are present in roots, and the autotoxic effect is also small [ 35 ]. This may be the reason why the autotoxicity of water extracts from various plant parts is different.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen Fertilization in a Faba Bean–Wheat Intercropping System Can Alleviate the Autotoxic Effects in Faba Bean

Cen

Zheng

Guo

et al. 2023

Plants

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Continuous cultivation of the faba bean will lead to its autotoxicity. Faba bean–wheat intercropping can effectively alleviate the autotoxicity of the faba bean. In order to investigate the autotoxicity of water extracts of various parts of the faba bean, we prepared water extracts of various parts of the faba bean, such as the roots, stems, leaves, and rhizosphere soil. The results showed various parts of the faba bean significantly inhibited the germination of faba bean seeds. The main autotoxins in these parts were analyzed using HPLC. Six autotoxins, namely, p-hydroxybenzoic acid, vanillic acid, salicylic acid, ferulic acid, benzoic acid, and cinnamic acid, were identified. The exogenous addition of these six autotoxins significantly inhibited the germination of faba bean seeds in a concentration-dependent manner. Furthermore, field experiments were conducted to investigate the effects of various levels of nitrogen fertilizer on the autotoxin content and the aboveground dry weight of the faba bean in a faba bean–wheat intercropping system. The application of various levels of nitrogen fertilizer in the faba bean–wheat intercropping system could significantly reduce the content of autotoxins and increase the aboveground dry weight in faba bean, particularly at the N2 level (90 kg/hm2). The above results showed that the water extracts of faba bean roots, stems, leaves, and rhizosphere soil inhibited faba bean seed germination. The autotoxicity in faba bean under continuous cropping could be caused by p-hydroxybenzoic acid, vanillic acid, salicylic acid, ferulic acid, benzoic acid, and cinnamic acid. The autotoxic effects in the faba bean were effectively mitigated by the application of nitrogen fertilizer in a faba bean–wheat intercropping system.

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“…All parts of this plant (leaves, fruit, flowers, stems, roots, and seeds) have been reported to have medicinal value due to its properties, such as anti-inflammatory [42], allelopathic [43], wound healing [44], antimicrobial [44,45] and antioxidant [46,47]. Typically, the plant leaves appear to be the most consistent source of chemicals involved in phytotoxicity, while fewer and less potent toxins occur in roots [48]. The aqueous methanol extracts of C. guianensis leaves significantly inhibited germination and growth of dicotyledonous plants and monocotyledonous weeds [43].…”

Section: Discussionmentioning

confidence: 99%

Potential Allelopathic Candidates for Land Use and Possible Sustainable Weed Management in South Asian Ecosystem

et al. 2019

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Weed management is one of the significant challenges of field crops since weeds pose a remarkable threat to crop productivity in South Asian countries, including Bangladesh. Allelopathy, a phenomenon whereby secondary metabolites produced and released by one plant species influence the growth and development of other species can be exploited in sustainable management. The focus of this study was to evaluate potential allelopathic plant species which can be further explored as alternatives to synthetic herbicides or incorporated as part of integrated weed management in sustainable agriculture. Two hundred fifty-two plant samples from 70 families were collected from Bangladesh and evaluated with the sandwich bioassay. Thirty-one percent of the samples showed significant allelopathic potential on lettuce radicle elongation. Among the species that showed substantial inhibition, more than 7% of the samples showed higher inhibition (HI) and 25% showed moderate inhibition (MI) on lettuce radicle. Fruit pulps of Couroupita guianensis (95.4%), fruits of Phyllanthus emblica (95.4%), and Acacia concinna (95.4%) showed the highest inhibition on lettuce radicle elongation. In contrast, the leaf of Bombax insigne had growth promoting activity by stimulating radicle (23%) and hypocotyl (80%) elongation of lettuce seedlings. This result suggested that the species with significant plant growth inhibitory potential may play a vital role as an alternative to the increasing use of synthetic herbicides for sustainable weed management in agricultural land.

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Growth Stage of Cyperus esculentus Influences Its Allelopathic Effect on Ectomycorrhizal and Higher Plant Species

Cited by 10 publications

References 16 publications

Allelopathic activity of different plant parts of Peganum harmala L. and identification of their growth inhibitors substances

Allelopathic activity of different plant parts of Peganum harmala L. and identification of their growth inhibitors substances

Nitrogen Fertilization in a Faba Bean–Wheat Intercropping System Can Alleviate the Autotoxic Effects in Faba Bean

Potential Allelopathic Candidates for Land Use and Possible Sustainable Weed Management in South Asian Ecosystem

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