Effects of allelopathic substances produced by asparagus on incidence and severity of asparagus decline due toFusarium crown rot

Hartung, A. C.; Stephens, C. T.

doi:10.1007/bf00982219

Cited by 60 publications

(43 citation statements)

References 5 publications

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“…Early work by Young in Taiwan (1981,1983-1985,1984,1985 focused on the exudates of asparagus roots and extracts from asparagus soils which were collected using XAD^t resin. These extracts inhibited the growth of asparagus seedlings and inhibition was correlated with phenolic content of the extract.…”

Section: H92063mentioning

confidence: 99%

“…It was found that inhibition decreased with time and that the activity was located in material which fluoresced under UV light and also reacted with phenolic sensitive reagents. Hartung et al (1983Hartung et al ( , 1986Hartung et al ( , 1989. examined the effects of extracts from asparagus tissue on the growth of seedlings of various species and also the combined effect of autotoxins and Fusarium spp.…”

Section: H92063mentioning

confidence: 99%

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Replant problem and chemical components of asparagus roots

Lake

Falloon²,

Cook³

1993

New Zealand Journal of Crop and Horticultural Science

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Crop failures associated with asparagus replanting have been ascribed to a combination of microbiological and chemical influences. Extracts from asparagus roots and soil were examined to locate inhibitory chemicals. Analysis of root extract fractions in a seedling assay showed that phenolic and saponin components inhibited growth but the most inhibitory material was located in the amino acid/carbohydrate fraction. However, inhibitory asparagus soil extracts did not contain significant levels of active compounds (tryptophan, caffeic acid) identified from root extracts.

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Section: H92063mentioning

confidence: 99%

Section: H92063mentioning

confidence: 99%

Replant problem and chemical components of asparagus roots

Lake

Falloon²,

Cook³

1993

New Zealand Journal of Crop and Horticultural Science

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“…An interaction of root autotoxin with the two common Fusarium species affecting asparagus was first reported by Hartung & Stephens (1983). They found that neither Fusarium nor root fragments alone reduced dry weight of asparagus seedlings appreciably, but when combined they significantly decreased dry weight and increased root rot of seedlings.…”

Section: Autotoxinsmentioning

confidence: 97%

“…More recent reports describe how crude extracts from asparagus roots have a negligible effect on seedling germination but dramatically reduce radicle elongation ofasparagus and several other plant species (Hartung & Stephens 1983;Shafer & Garrison 1986;Hazebroek et al 1989). …”

Section: Autotoxinsmentioning

confidence: 99%

Asparagus decline and replant problem in New Zealand

Schofield¹

1991

New Zealand Journal of Crop and Horticultural Science

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The common disorder involving the decline of commercial asparagus plantings, and the involvement ofFusarium infections with the disorder, are outlined. The symptoms associated with F. oxysporum and F. moniliforme infections of Asparagus ojficinalis are described. The replant problem of asparagus is discussed and the potential for autotoxins and Fusarium infections to cause the problem are examined as are other possible factors such as herbicide residues, Phytophthora infections, and soil structural problems. Possibilities for overcoming the replant problem and directions for further research into this disorder are explored.

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“…Similarly, under laboratory conditions almost any degree of water stress seems to lower the ferulic acid-inhibition threshold on germination or seedling growth (96). In some cases the pathogenesis of disease organisms, such as root rot fungi, is increased by allelopathic effects from decomposing plant residue (104)(105)(106).…”

Section: Quantity Of Allelochemicals Some Of the Pioneer Investigatimentioning

confidence: 99%

Allelopathy: Current Status and Future Goals

Einhellig

1994

ACS Symposium Series

148

112

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The phenomenon of allelopathy encompasses all types of chemical interactions among plants and microorganisms. Several hundred different organic compounds (allelochemicals) released from plants and microbes are known to affect the growth or aspects of function of the receiving species. Many new allelochemicals have been identified in recent years and it has become clear that the actions of allelochemicals are important features characterizing the interrelationships among organisms. These compounds influence patterns in vegetational communities, plant succession, seed preservation, germination of fungal spores, the nitrogen cycle, mutualistic associations, crop productivity, and plant defense. Allelopathy is tightly coupled with competition for resources and stress from disease, temperature extremes, moisture deficit, and herbicides. Such stresses often increase allelochemical production and accentuate their action. Allelopathic inhibition typically results from a combination of allelochemicals which interfere with several physiological processes in the receiving plant or microorganism. Other than the autecological study of specific species, there are persistent challenges in allelopathy to determine the mechanism of action of compounds, isolate new compounds, evaluate environmental interactions, and understand activity in the soil. New frontiers will focus on ways to capitalize on allelopathy to enhance crop production and develop a more sustainable agriculture, including weed and pest control through crop rotations, residue management, and a variety of approaches in biocontrol. Other goals are to adapt allelochemicals as herbicides, pesticides, and growth stimulants, modify crop genomes to manipulate allelochemical production, and better elucidate chemical communications that generate associations between microorganisms and higher plants. 0097 ALLELOPATHY: ORGANISMS, PROCESSES, AND APPLICATIONSThe writings of some natural philosophers that date back more than two millenniums show that they recognized chemical influences in nature (1). However, it is the evidence accumulated over the last several decades which has established that external roles for biochemicals, meaning roles that do not directly affect the basic physiology of the producing organism, are pervasive themes characterizing the interrelationships among organisms. This realization does not diminish the respective importance that competition for resources has on the relative success of an organism or a species. Instead, chemical ecology extends our dimensions of understanding and provides new insights into the intricacies of interchanges that occur in an ecosystem, community, or population.Allelopathy, a subset within the broader scope of chemical ecology, is concerned with effects that chemicals of plant or microbial origin have on growth, development, and distribution of other plants and microorganisms in natural communities or agricultural systems. The aims of this overview chapter are to provide a synthesis of the scope of allelopathy, suggest gen...

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Effects of allelopathic substances produced by asparagus on incidence and severity of asparagus decline due toFusarium crown rot

Cited by 60 publications

References 5 publications

Replant problem and chemical components of asparagus roots

Replant problem and chemical components of asparagus roots

Asparagus decline and replant problem in New Zealand

Allelopathy: Current Status and Future Goals

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