Selective phyto-toxicity of 1,3,7-trimethylxanthine between Phaseolus mungo and some weeds.

Rizvi, S. J. H.; Mukerji, D.; Mathur, Samir D.

doi:10.1271/bbb1961.45.1255

Cited by 41 publications

(19 citation statements)

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“…2A -E). Coffee wastes such as coffee pulp, husk and grounds include caffeine, tannins and polyphenols, which show plant growth inhibitory activities (Rizvi et al, 1981;Pandey et al, 2000). Thus, the growth inhibition of green manure crops on the soil containing 10 kg m -2 of coffee grounds could be due to the inhibitory activities of coffee grounds.…”

Section: The Effects Of Coffee Grounds On Green Manure Cropsmentioning

confidence: 99%

Field Evaluation of Coffee Grounds Application for Crop Growth Enhancement, Weed Control, and Soil Improvement

Yamane

Kono

Fukunaga³

et al. 2014

Plant Production Science

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Section: The Effects Of Coffee Grounds On Green Manure Cropsmentioning

confidence: 99%

Field Evaluation of Coffee Grounds Application for Crop Growth Enhancement, Weed Control, and Soil Improvement

Yamane

Kono

Fukunaga³

et al. 2014

Plant Production Science

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“…Apart from the L-DOPA in velvetbean, caffeine in a coffee tree (Rizvi et al, 1981), mimosine in Lucaena spp. (Chou & Kuo, 1986), nordihydroguaiaretic acid (NDGA) in a creosote bush (Elacovitch & Stevens, 1985), each contained at a high quantity in the respective plants, are well known to have physiological effects on animals, while their associations with other plants in terms of allelopathy have only recently been identified.…”

Section: ) Survey Of Allelopathic Plants: As Listed Inmentioning

confidence: 99%

Allelopathy in the natural and agricultural ecosystems and isolation of potent allelochemicals from Velvet bean (Mucuna pruriens) and Hairy vetch (Vicia villosa)

Fujii

2003

Biol. Sci. Space

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6Our group has been engaged in the search for allelopathic plants in order to determine allelochemicals and its mechanism. In the course of this study, we developed new methods to discriminate and identify allelopathic actions from other competitive factors such as nutrients, light and water . We reported allelopathy in Velvetbean , Hairy vetch (Fujii et al. 1992, 1995, medicinal plants , and other species as well.In the course of those research, we established a new bioassay system that could demonstrate and assess the potential allelopathic action of plants. It was named "plant box method," and "sandwich method". This method involves mixed planting using agar medium, and is effective to study on the exudation of allelochemicals from leaves and/or roots. These methods can be applied to evaluate the allelopathic action of root exudates and leaf leachates.On the other hand, we realized a difficulty to use allelopathic plants directly to agriculture by itself, because other competitive factors such as light and nutrients are also acting on them in parallel. We decided to use the allelopathic factor together with such competition factors for plants growth. In this sense, cover crop is probably a good application of allelopathy. If other competition factors are the same, allelopathy will play an important role in weed suppression in combination with other factors. Some farmers suggested from their experiences that some ground cover plants suppress weeds drastically. There is a possibility that some cover crops could be used for practical weed suppression. In order to study its feasibility, we began to screen the allelopathic activity of cover plants by the plant box method and the sandwich method. Based on these primary selections, and experiences on the fields, we conducted a field experiment to select the most promising cover crop species for the weed control in orchard garden and abandoned fields. (Fujii et al. 1990a(Fujii et al. , 1990b: 70 plant species were tested on their allelopathy following the Richards' function method (Richards, 1959), which was proved to be suited for germination tests of lettuce and some weed plants ( Lehle & Putnam, 1982). In order to stop the action of enzymes, which degrade certain constituents of a plant, and to minimize the alteration of the constituent organic substances, the leaves, stems and roots were dried at 60°C for 24 hrs. One hundred mg of the dried samples was extracted with 10 ml water. Extracted mixture was sonicated for 60 sec to complete the migration of chemicals into aqueous solution. The extracts were filtered with Whatman No.4 filter papers. Ten lettuce seeds were placed in 4.5 cm diameter-Petri dishes soaking 0.5 ml of test solution on Whatman No.1 filter papers. The seeds on Petri dishes were incubated in the dark at 25 °C. Numbers of the germinated seeds was counted, and growth of hypocotyl and radicle were measured on the 4th day. Biological Sciences in Space, Vol.17 No.1 (2003): 6-13 Materials and Methods 1) Survey on allelopathic plants Allelopathy i...

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“…3). Caffeine concentrations of this range have been reported to be inhibitory on germination of the tropical weed, Amaranthus spinosus (Rizvi et al 1981). Since there is undoubtedly a concentration gradient in the rhizosphere, caffeine concentration in the immediate neighbourhood of the roots is expected to be much higher.…”

Section: Discussionmentioning

confidence: 99%

Metabolism and Excretion of Caffeine during Germination of Coffea arabica L.

Baumann

Gabriel

1984

Plant and Cell Physiology

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To investigate the physiological role of the purine alkaloids during germination, seeds of Coffea arabica were allowed to germinate under aseptic conditions on agar at 26°C, either in the dark or in the light. After imbibition for 7 days less than 1 % of the seed caffeine is found in the agar, indicating a strong diffusion barrier at the surface of the coffee bean. After 56 days, when the radicle has grown deep into the agar support, a considerable amount (22%) of caffeine is excreted. The total caffeine content increases during germination for 56 days by 83% in the dark and by 51 % in the light, whereas the soluble protein falls drastically. We propose that caffeine is not a nitrogen reserve for germination and acts against competitors (release into the soil) and against predators (concentration increase in the tissue).Key words: Caffeine -Coffea arabica •-Excretion -Germination -Nitrogen metabolism -Purine alkaloid -Theobromine.There is a large body of information on the actual aspect of purine alkaloid physiology, published fifty or more years ago, which is difficult of access and in certain instances requires a re-examination with subtle methods allowing an improved insight into the physiological role of these alkaloids. At the beginning of this century U. Suzuki expressed clearly that in the tea plant "the processes of metabolism show more connection with the production of coffein than those of assimilation and synthesis do" (cited by Weevers 1930, p. 123). Later, Weevers (1907, 1930 carried out a detailed study on this topic in all caffeine-containing plant species consumed by man, i.e. tea {Camellia sinensis (L.) O. Kuntze), coffee (different species of Coffea), mate (Ilex paraguariensis St. Hil.), guarana (Paullinia cupanaH.B.K..), cocoa (Theobroma cacao L.) and cola (Cola acuminata Schott et Endl.). He analyzed detached leaves and, where possible, seedlings, and always observed an increase in protein accompanied by a decrease in purine alkaloids or vice versa depending on the experimental conditions selected. As regards these events during seedling development of Coffea arabica, Weevers reported results from experiments in the dark only.We decided therefore to examine the changes in different nitrogen fractions during germination of Coffea arabica L. under controlled environmental conditions and to make a comparison on the physiology of caffeine between the coffee plant and other caffeine-containing plant species.

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Selective phyto-toxicity of 1,3,7-trimethylxanthine between Phaseolus mungo and some weeds.

Abstract: Studies on plant products have revealed that many of them may either act as fungicides,1)2) insecticides,3) chemosterilants,4>5) moluscicides,6) bactericides7) or as virucides.8) Although there are a number of reports on natural inhibitors of germination and growth,9) and on

Cited by 41 publications

References 1 publication

Field Evaluation of Coffee Grounds Application for Crop Growth Enhancement, Weed Control, and Soil Improvement

Field Evaluation of Coffee Grounds Application for Crop Growth Enhancement, Weed Control, and Soil Improvement

Allelopathy in the natural and agricultural ecosystems and isolation of potent allelochemicals from Velvet bean (Mucuna pruriens) and Hairy vetch (Vicia villosa)

Metabolism and Excretion of Caffeine during Germination of Coffea arabica L.

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