Pratylensus scribneri

Phytoalexins can be elicited in plants by a variety of agents, including viruses, microorganisms and nematodes [292, 293]. When resistant plants are infected by nematodes, phytoalexins with antinematodal activity can be produced [294]. Some coumestans have been implicated in the resistance of plants to nematodes. For example, when the roots of the resistant lima bean (Phaseolus lunatus) were inoculated with Pratylensus scribneri, coumestrol (181) accumulated at the site of nematode attack. In vitro, coumestrol (5 ig/ml) inhibited the motility of the nematode [294]. Correlative evidence for a functional role of related compounds in resistance towards nematodes has been obtained [295-297]. In particular, nematode attack on the roots elicits the transcription of genes encoding several enzymes of the shikimate pathway that leads to phytoalexin production. Induction of enzyme activity results from transcriptional activation of the genes leading to increased levels of translatable mRNA [298]. 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

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