Oikonomou, Adriana published the artcileDefence against Bremia lactucae conferred by the resistance gene Dm7 in lettuce is broken by treatment with dichloroisonicotinic acid, Name: 4-Hydroxy-3,5-dimethoxybenzaldehyde, the publication is Plant Pathology (2022), 71(3), 611-620, database is CAplus.
The effect of inducers of systemic acquired resistance, dichloroisonicotinic acid (DCINA) and acibenzolar-S-Me (BION), on compatible interactions between Bremia lactucae and lettuce were examined using a detached cotyledon infection assay. Treatment with both activators caused a reduction in sporulation on susceptible cultivars Cobham Green challenged with isolate CL9W and Diana inoculated with isolate Tv, with DCINA being more effective than BION on an equimolar basis. Unexpectedly, treatment with both compounds suppressed the resistance conferred by the Dm7 gene in cv. Diana challenged by isolate CL9W (A7). The frequency of sporulation was greatly increased by DCINA in the incompatible interaction. The suppression of defense was associated with a delay in the onset of the Dm7-based hypersensitive reaction as indicated by the extended viability of penetrated epidermal cells, and reductions in both the accumulation of the phytoalexin lettucenin A and the deposition of autofluorescent phenolics such as syringaldehyde on plant and oomycete cell walls. The anal. of DCINA homologues indicated that 2-chloroisonicotinic acid was as effective as the dichloro-derivative in suppressing resistance in cv. Diana, whereas the absence of the carboxyl group rendered 2,6-dichloropyridine inactive. Infection of cotyledons by Botrytis cinerea was also found to be enhanced by DCINA treatment. Based on our results, we discuss the possibility that DCINA reduces Dm7 transcription through an epigenetic mechanism, as is supported by bioinformatic analyses of the resistance gene, and that it suppresses jasmonate-dependent resistance to B. cinerea.
Plant Pathology published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Name: 4-Hydroxy-3,5-dimethoxybenzaldehyde.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem