1-3-dihydroxy-4-4-5-5-tetramethyl-2-(4-carboxyphenyl)tetrahydroimidazole has been researched along with Disease-Resistance* in 2 studies
2 other study(ies) available for 1-3-dihydroxy-4-4-5-5-tetramethyl-2-(4-carboxyphenyl)tetrahydroimidazole and Disease-Resistance
| Article | Year |
|---|---|
Chitosan nanoparticles having higher degree of acetylation induce resistance against pearl millet downy mildew through nitric oxide generation.
Downy mildew of pearl millet caused by the biotrophic oomycete Sclerospora graminicola is the most devastating disease which impairs pearl millet production causing huge yield and monetary losses. Chitosan nanoparticles (CNP) were synthesized from low molecular weight chitosan having higher degree of acetylation was evaluated for their efficacy against downy mildew disease of pearl millet caused by Sclerospora graminicola. Laboratory studies showed that CNP seed treatment significantly enhanced pearl millet seed germination percentage and seedling vigor compared to the control. Seed treatment with CNP induced systemic and durable resistance and showed significant downy mildew protection under greenhouse conditions in comparison to the untreated control. Seed treatment with CNP showed changes in gene expression profiles wherein expression of genes of phenylalanine ammonia lyase, peroxidase, polyphenoloxidase, catalase and superoxide dismutase were highly upregulated. CNP treatment resulted in earlier and higher expression of the pathogenesis related proteins PR1 and PR5. Downy mildew protective effect offered by CNP was found to be modulated by nitric oxide and treatment with CNP along with NO inhibitors cPTIO completely abolished the gene expression of defense enzymes and PR proteins. Further, comparative analysis of CNP with Chitosan revealed that the very small dosage of CNP performed at par with recommended dose of Chitosan for downy mildew management. Topics: Acetylation; Benzoates; Catalase; Catechol Oxidase; Chitosan; Disease Resistance; Gene Expression Regulation, Plant; Germination; Imidazoles; Nanoparticles; Nitric Oxide; Pennisetum; Peronospora; Peroxidase; Phenylalanine Ammonia-Lyase; Plant Diseases; Plant Proteins; Seedlings; Seeds; Superoxide Dismutase | 2018 |
The role of nitric oxide in basal and induced resistance in relation with hydrogen peroxide and antioxidant enzymes.
Nitric oxide (NO) is one of the main signal molecules, which is involved in plant growth and development and can change regular physiological activity in biotic and abiotic stresses. In this study, the role of NO in induced resistance with Pseudomonas fluorescent (CHA0) and basal resistance against Rhizoctonia solani in bean plant was investigated. Our results revealed that P. fluorescent and R. solani can increase NO production at 6h post inoculation (hpi). Also, using the NO donor S-nitroso-N-acetyl D-penicillamine (SNAP) led to increase NO and bean plant resistance against R. solani. Utilizing the NO scavenger, 2-(4-carboxyphenyl)-4,4,5,5-tetramethy-limidazoline-1-oxyl-3-oxide (cPTIO), not only decreased basal resistance but also reduced induced resistance. In continue, the activity of antioxidant enzymes was studied in the former treatments. SNAP, CHA0 and R. solani increased the activity of peroxidase (POX), catalase (CAT) and ascorbate peroxidase (APX) at 6, 12 and 24h post inoculation (hpi). In contrast, using cPTIO and R. solani simultaneously (cPTIO+R) showed reduction in activity of POX and APX at 6 hpi. The cPTIO+R treatment increased POX, APX and CAT activity at 12 and 24 hpi. Hydrogen peroxide (H Topics: Antioxidants; Ascorbate Peroxidases; Benzoates; Biological Control Agents; Catalase; Disease Resistance; Hydrogen Peroxide; Imidazoles; Nitric Oxide; Nitric Oxide Donors; Peroxidases; Phaseolus; Plant Diseases; Plant Leaves; Pseudomonas fluorescens; Rhizoctonia; S-Nitroso-N-Acetylpenicillamine | 2016 |