Differential growth-inhibitors produced by plants

Garb, Solomon

doi:10.1007/bf02860812

Cited by 59 publications

(23 citation statements)

References 63 publications

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“…Since umbelliferone is a root inhibitor (Garb 1961) and is strongly inhibitory to many species (Dawes & Maravolo 1973, Muller & Chou 1977, a detailed aUelopathic investigation was necessary.…”

Section: Introductionmentioning

confidence: 99%

Interference phenomena due to mouse-ear and king devil hawkweed

Makepeace

Dobson

Scott³

1985

New Zealand Journal of Botany

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Mouse-ear (Pilosella ojficinarum) and king devil (P. praealta), introduced to New Zealand in the 1920's, have rapidly increased in abundance in the modified short-tussock grasslands of the dry montane regions of South Island. Allelopathr and competition effects were investigated to explatn the success of these hawkweed species in ousting other species and to find an agronomically useful species to out-compete them. Evidence of allelopathic effects was found in both laboratory and field experiments. The phytotoxic agents in mouse.-ear and king devil are phenolics of which umbelhfe.rone is the most active. Umbelliferone, present 10 mouse-ear leaves only, is washed into the soil from recently dead leaves but not from living leaves, and is deleterious to root development. Mouse-ear and king devil compete for nitrogen, phosphorus, and water. Pot competition trials with several grass and clover species showed alsike clover to be the best competitor against the two hawkw.eeds .. The nutrient and moisture status of the soll modified the allelopathic effect. In field conditions, aUelopathy is effective as an interference phenomenon only under certain circumstances.

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Section: Introductionmentioning

confidence: 99%

Interference phenomena due to mouse-ear and king devil hawkweed

Makepeace

Dobson

Scott³

1985

New Zealand Journal of Botany

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“…We must obtain information about detoxification and other counter defenses and if possible, the biochemical basis for the many mutualistic associations which exist. Utilizing a companion plant that is selectively allelopathic, but does not appreciably interfere with crop growth has been reported (30). It is important that we expand our knowledge and capitalize on beneficial associations for long-term benefit.…”

Section: Compatibility Between Componentsmentioning

confidence: 98%

Prospects of allelopathic research in multi-storey cropping systems

John¹,

Nair²

2000

Allelopathy in Ecological Agriculture and Forestry

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The necessity to intensify agricultural land use has led to the development of multistorey cropping and crop mixtures. The crop combinations in two most intensive multistorey cropping systems practised World wide viz., plantation crop-based systems and homestead agroforestry system have been reviewed in this paper. In the past, much work on allelopathic interactions has been conducted in agriculture and forestry but studies in multi-storey cropping systems are limited. The study of allelopathic interactions in multi-storey cropping systems is highly complicated, owing to the species diversity and interferences arising from competition between different components of the system. This is further complicated by the unique microclimatic and edaphic factors of each system. Allelopathic research in these multi-storey cropping systems demands a multidisciplinary systems approach in which the different biological components of the system viz., microclimate, soil properties, microflora, spatial and temporal dimensions etc., should be investigated in totality. Considering the complexity of allelopathic interactions in multi-storey cropping systems, the thrust areas for allelopathic research are: separating allelopathic interference from competition, screening germplasm of crops/trees for suitability to these systems, monitoring the production of allelochemicals by the different components in relation to the microclimatic and edaphic factors of the system, exploitation of allelopathy for improving the productivity of the system and plant protection.

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“…idaeus) the growth inhibitor salicyclic acid has been isolated and identified (Doby, 1965). This phenolic acid has been indicated as an allelopathic agent in several studies (Garb, 1961;DeBell, 1970).…”

mentioning

confidence: 97%

Mutual exclusion between Salmonberry and Douglas-fir in the Coast Range of Oregon

Still¹

2000

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One serious problem faced by the forest industry in the PacificNorthwest is poor regeneration of commercial trees ~land which is har vested and subsequently dominated by brush species. In Coastal Oregon, salmonberry is one of these brush species. Detailed investigations of field sites indicate that light i~tensity in the brush stands was low but sufficient for germination and early growth of Douglas-fir seedlings and soil moisture percentages and nutrient levels were high enough to support early Douglas-fir growth. Laboratory tests demonstrated the presence of leachable phytotoxins in the leaves of salmonberry. The hypothesis resulting from this study is that salmonberry releases a phytotoxin that in synergism with environmental stresses (i.e •• light).suppresses germination and growth of Douglas-fir seedlings in the field.

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Differential growth-inhibitors produced by plants

Cited by 59 publications

References 63 publications

Interference phenomena due to mouse-ear and king devil hawkweed

Interference phenomena due to mouse-ear and king devil hawkweed

Prospects of allelopathic research in multi-storey cropping systems

Mutual exclusion between Salmonberry and Douglas-fir in the Coast Range of Oregon

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