Autotoxic effects of pearl millet aqueous extracts on seed germination and seedling growth

Saxena, Anurag; Singh, Devraj; Joshi, Nitesh

doi:10.1006/jare.1996.0061

Cited by 54 publications

(38 citation statements)

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“…Increasing inhibitory rates with increasing concentration was in accordance with previous reports (El-darier and Youssef 2000;Ismail and Chong 2002;Singh et al 2003;Batish et al 2006). Low concentration extracts actually promoted seed germination or seedling growth of the target species, but high extract concentrations significantly inhibited seed germination and seedling growth, which suggests that stimulatory or inhibitory effect is a function of concentration (Saxena et al 1996).…”

Section: Resultssupporting

confidence: 86%

Differential belowground allelopathic effects of leaf and root of Mikania micrantha

Gao

et al. 2008

Trees

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This study evaluates the relative contributions of leaves and roots to the belowground allelopathic effects of Mikania micrantha. The hypothesis that leaves contribute more to the allelopathic effect than roots was experimentally tested. We assessed the allelopathic effects of aqueous extracts from Mikania leaves and roots on the seed germination and seedling growth of two co-occurring woody plants in southern China, Lagerstroemia indica L. and Robinia pseudoacacia L. The results showed that the aqueous extracts from Mikania leaves and roots had inhibitory effects on the woody species. Allelopathic activity depended on the concentration of the extracts, target species, and the extract sources (i.e., leaves vs. roots of Mikania). Leaf extract showed stronger allelopathic effects than root extract on germination percentage, initial germination time, speed of germination, and shoot height; while root extract had greater allelopathic effects on roots than leaf extract. The latter phenomenon might greatly promote the invasion success of Mikania due to more direct and effective allelopathy of root. Our results suggest that allelopathy of root extract on belowground biomass might be greater than that of leaf extract for some species in contrast allelopathy of leaf extract on belowground biomass might also be greater than that of root extract for other species, at least for their effects on root growth of the target species.

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Section: Resultssupporting

confidence: 86%

Differential belowground allelopathic effects of leaf and root of Mikania micrantha

Gao

et al. 2008

Trees

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“…Different studies have shown that the presence of allelochemicals in the soil may be determined by many factors, such as the density of leaves littered, the rate of decomposition of plant material, the neighbouring plant species and rainfall (Saxena et al 1996). Soil type and its pH are also important (Saxena et al 1996) in determining whether or not allelopathic substances are present in the soil and if they are in threshold concentrations to affect other plants (Jefferson and Pennacchio 2003).…”

Section: Discussionmentioning

confidence: 99%

“…Soil type and its pH are also important (Saxena et al 1996) in determining whether or not allelopathic substances are present in the soil and if they are in threshold concentrations to affect other plants (Jefferson and Pennacchio 2003).…”

Section: Discussionmentioning

confidence: 99%

Effects of Pinus pinea litter on seed germination and seedling performance of three Mediterranean shrub species

2012

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Pinus pinea L. is a coniferous tree inhabiting the Mediterranean Basin, which appears widely distributed in the Iberian Peninsula, frequently associated to Mediterranean shrub species, such as Cistus salvifolius L., C. libanotis L. and Halimium halimifolium (L.) Willk.(Cistaceae). This study investigated the effects (chemical and physical) of P. pinea needles on the seed germination and early growth of these three shrub species. Laboratory experiments were carried out in order to assess an expected negative effect by using different treatments to seeds (physical layer and two aqueous extracts concentrations). Seed germination of all species was inhibited when treated with aqueous extracts and the degree of inhibition was higher when using the extract with the highest concentration, while no effect was observed with the physical layer treatment. Seedling performance was also sensitive to the different treatments, showing the most stressed values with the high concentration extract. The results from this study highlight the importance of allelopathy of P. pinea needles as a mechanism for controlling seed germination and seedling performance of some Mediterranean shrub species.

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“…The phytotoxic effect of CFCS (500 µl) containing oilbased paint at final concentration 300 ppm of B. parabrevis (NAP3) was observed on the seed germination and seedling growth of wild radish seeds as reported previously [25][26]. The seeds were surface sterilized by rinsing with 0.1% mercuric chloride for 4-5 minutes and again washed twice with the sterile distilled water and allowed to dry on Whatman filter paper No.1.…”

Section: Phytotoxic Effectmentioning

confidence: 99%

Bioremediation of Oil-Based Paint from Aqueous Media by Novel Indigenous Brevibacillus parabrevis Strain NAP3 and its Toxicity Assessment

Phulpoto

Qazi

Mangi

et al. 2017

Pol. J. Environ. Stud.

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The present study sought to explore the bioremediation of oil-based paint from aqueous media using indigenous bacterial isolate Brevibacillus parabrevis strain NAP3 and its toxicity assessment against prokaryotic and eukaryotic biological models. The bacterial isolate was initially screened for bioremediation potential in mineral salts medium containing oil-based paint (conc. 300 ppm, w/v) under shake flask settings. Moreover, the percentage removal of oil-based paint from aqueous media was investigated using a spectrophotometer at 285 nm under two different experimental conditions, i.e., with and without glucose. Evidently, the bacterial isolate displayed maximum oil-based paint removal of 83% in flasks containing glucose as an additional carbon source after 14 days of the treatment, whereas without glucose supplementation it reached up to 78%. The Fourier transform infrared (FTIR) spectra showed noticeable biodegradative changes of the oil-based paint relevant to peaks in the wave number frequency range of 800-600 cm , and 3,200 to 3,400 cm -1 (corresponding to C-H, C-O-N, C-O-C, and CH 2 aliphatic stretch and terminal CH 3 bonds, and N-H bonds, respectively, in treated samples as compared to controls; non-inoculated samples). After treatment, the cellfree supernatants containing oil-based paints displayed reduced cytotoxicity against brine shrimp larvae, phytotoxicity against wild reddish seeds, and antimicrobial activity against selected pathogenic bacteria and fungi, which indicated the possible use of B. parabrevis as potential oil-based paint-degrading bacterium in order to restore paint-polluted environments.

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Autotoxic effects of pearl millet aqueous extracts on seed germination and seedling growth

Cited by 54 publications

References 0 publications

Differential belowground allelopathic effects of leaf and root of Mikania micrantha

Differential belowground allelopathic effects of leaf and root of Mikania micrantha

Effects of Pinus pinea litter on seed germination and seedling performance of three Mediterranean shrub species

Bioremediation of Oil-Based Paint from Aqueous Media by Novel Indigenous Brevibacillus parabrevis Strain NAP3 and its Toxicity Assessment

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