Allelochemicals Produced during Sinigrin Decomposition in Soil

Borek, V.; Morra, Matthew J.; Brown, P. D.; McCaffrey, J. P.

doi:10.1021/jf00040a037

Cited by 70 publications

(44 citation statements)

References 10 publications

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“…A largely reduced total amount of toxic volatiles released under these nonphysiological conditions must be considered as a likely explanation for the effects observed. The results from Borek et al (1994) are in agreement with a significant effect of pH 3.0 and below on production of inhibitory volatiles. This suggests that myrosinase isoenzymes in mustard powder are able to produce effective amounts of ITCs through GSL hydrolysis under a wide range of pH conditions.…”

supporting

confidence: 84%

“…When compared to previous experiments, the results suggest that the pH of the OA solutions was a more important factor than OA itself. Borek et al (1994) reported that decomposition of sinigrin, the main GSL component of mustard seeds, yields nitrile of allyl-GSL as the major reaction product in acid solutions below approximately pH 4.0. Decomposition of sinigrin in less acid solutions with pH values above 4.0 yielded allyl ITC as the major reaction product.…”

mentioning

confidence: 99%

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Reaction of glucosinolate-myrosinase defence system in Brassica plants to pathogenicity factor of Sclerotinia sclerotiorum

2010

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The glucosinolate-myrosinase defence system, specific to Brassicales plants, produces toxic volatile compounds during mechanical injury or pathogen attack. The reaction of this system to oxalic acid, known as a pathogenicity factor of Sclerotinia sclerotiorum, is not fully understood. The hydrolysis of glucosinolates was studied at varying conditions in the presence of oxalic acid in the substrate. In a bioassay, colonies of the pathogen were exposed to volatiles from hydrated mustard powder used as a myrosinase and glucosinolate source. The glucosinolate-myrosinase (GSL-M) system was activated in the presence of oxalic acid at a concentration and pH similar to that expected in vivo. Volatile production was inhibited only when the pH fell to 3 or below. It is unlikely that oxalic acid plays a significant role in disarming the GSL-M system during infection of Brassica hosts.

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supporting

confidence: 84%

mentioning

confidence: 99%

Reaction of glucosinolate-myrosinase defence system in Brassica plants to pathogenicity factor of Sclerotinia sclerotiorum

2010

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“…However, there is a clear relationship between the glucosinolate degradation products and pH. According to Borek et al (1994) and Rossiter (1996, 2006), myrosinase-mediated degradation of glucosinolates is strongly pH dependent and isothiocyanates are usually produced at neutral pH while nitrile production occurs at lower pH. Borek et al (1994) reported that allyl isothiocyanate production increased in a non-linear manner from pH 2.5 to approximately pH 5.0.…”

Section: Influence Of Ph On Compounds In the Brassicaceaementioning

confidence: 99%

Phytochemicals of Brassicaceae in plant protection and human health – Influences of climate, environment and agronomic practice

Björkman¹,

Klingen²,

Birch³

et al. 2011

Phytochemistry

350

252

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“…For L. draba, it has been shown in laboratory and greenhouse experiments that foliage leachates, root exudates, and shoot extracts negatively affected germination, root length, and growth of crop plants (Qasem 1994(Qasem , 2001(Qasem , 2004. Three glucosinolates were identified in L. draba root extracts (Kiemnec and McInnis 2002) and these or their hydrolysis products (isothiocyanates and ionic thiocyanate) have been shown to function as allelopathic agents (Choesin and Boerner 1991;Borek et al 1994Borek et al , 1996Brown et al 1991;Warton et al 2003). The greater negative effect of L. draba on native North American grass species and the differential effects of US and European L. draba on the European grass species could be due to allelopathic effects.…”

Section: Plantmentioning

confidence: 99%

No difference in competitive ability between invasive North American and native European Lepidium draba populations

et al. 2007

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The evolution of increased competitive ability (EICA) hypothesis states that plants introduced into a new range experience reduced herbivory, which in turn results in a shift in resource allocation from herbivore defense to growth. If genotypes of an invasive plant species from its native and introduced ranges are grown under common conditions, introduced genotypes are expected to grow more vigorously than conspecific native genotypes. We tested predictions of the EICA hypothesis with the invasive species Lepidium draba by comparing the growth of genotypes from its native European and introduced western US ranges under common conditions. To test potential differences in competitive ability, we grew L. draba from both continents with either Festuca idahoensis, a weak competitor native to North America, or Festuca ovina, a strong competitor native to Europe. Contrary to EICA predictions, there were no differences in the performance of native and introduced L. draba, independent of whether plants were grown with F. idahoensis, F. ovina, or alone. The strong competitor, F. ovina impaired the growth of L. draba more than the weak competitor F. idahoensis and conversely, F. idahoensis was generally more impaired by L. draba than was F. ovina. While the native F. idahoensis was equally affected by L. draba regardless of range, F. ovina was not: US L. draba had a stronger negative effect on F. ovina growth than European L. draba. Our data suggest that the EICA hypothesis is not suitable to explain the invasion success of L. draba in the US. Instead, the greater competitive effect of L. draba on the North American F. idahoensis and the asymmetric competitive effect of L draba from different origins on F. ovina may indicate superior competitive ability for resources, or the presence of allelopathic traits in L. draba, to which plant species in non-native ranges are maladapted.

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Allelochemicals Produced during Sinigrin Decomposition in Soil

Cited by 70 publications

References 10 publications

Reaction of glucosinolate-myrosinase defence system in Brassica plants to pathogenicity factor of Sclerotinia sclerotiorum

Reaction of glucosinolate-myrosinase defence system in Brassica plants to pathogenicity factor of Sclerotinia sclerotiorum

Phytochemicals of Brassicaceae in plant protection and human health – Influences of climate, environment and agronomic practice

No difference in competitive ability between invasive North American and native European Lepidium draba populations

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