Characterization and determination of prehelminthosporol, a toxin from the plant pathogenic fungus Bipolaris sorokiniana, using liquid chromatography/mass spectrometry

Carlson, Haley; Nilsson, Patric; Jansson, Hans; Odham, Göran

doi:10.1016/0167-7012(91)90063-v

Cited by 43 publications

(31 citation statements)

References 14 publications

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“…In the present study some of the cultivars were more resistant than others to B. sorokiniana, the causal agent of common root rot, but no evidence of slower RCD in those varieties was found. B. sorokiniana is a toxin-producing fungus and the most abundantly produced compound is prehelminthosporol (Carlson et al, 1991). Liljeroth, Franzon-Almgren & Gustafsson (1994) found that prehelminthosporol applied to nutrient solution increases the cortical death rate in excised barley roots.…”

Section: Resl'ltsmentioning

confidence: 99%

Comparisons of early root cortical senescence between barley cultivars, Triticum species and other cereals

Liljeroth

1995

New Phytologist

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SUMMARYThe natural rate of root cortical death (RCD) in seminal roots was investigated in different cereals by staining the roots with acridine orange. In all cereals investigated the part of the cortex having stainable nuclei gradually decreased with increased age of the root. Wheat differed from barley, oats and rye in having a much faster rate of RCD. In 15-d-old root regions of wheat grown in soil, only 10-20% of the radius of the root had stainable nuclei. In barley, oats and rye the amount of cortex with stainable nuclei varied between 65 and 80 "o. Minor differences in RCD were found between different barley cultivars or accessions. Large variation in RCD was found between different Triticum species: T. monococcum, T. dicoccum and different Aegilops species had much slower RCD than did hexaploid wheat. These results are discussed in relation to microbial colonization of roots and susceptibility to root pathogens.

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Section: Resl'ltsmentioning

confidence: 99%

Comparisons of early root cortical senescence between barley cultivars, Triticum species and other cereals

Liljeroth

1995

New Phytologist

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“…The importance of each of these compounds in the infection process is not fully understood. In a previous study we isolated the strongest membranedisrupting metabolite from a hydrophobic extract of the fungus (Carlson et al, 1991a). We found several related sesquiterpenes among which prehelminthosporol was the predominant and had the greatest disruptive effect.…”

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confidence: 93%

“…We found several related sesquiterpenes among which prehelminthosporol was the predominant and had the greatest disruptive effect. In a bioassay on red beet root cells, the toxin caused leakage of the red pigment betacyanine (Carlson et al, 1991a). Studies performed on young barley roots have shown a leakage of ATP from the cells when treated with prehelminthosporol (Liljeroth et al, 1994).…”

mentioning

confidence: 98%

“…sorokiniana is known to produce nonselective phytotoxins. A series of sesquiterpenes with a similar chemical structure has been isolated from the fungus (De Mayo et al, 1961;Tamura et al, 1963;Nukina et al, 1975;Carlson et al, 1991a). The importance of each of these compounds in the infection process is not fully understood.…”

mentioning

confidence: 99%

“…The fact that the toxin is present in large quantities in conidia as well as in hyphae (Carlson et al, 1991a) raises the question of how the fungus is able to protect itself against this toxic compound.…”

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confidence: 99%

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