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RNA-seq revealed counter effect of chitosan against Botrytis cinerea on grape berries

ABSTRACT: Plants have great potential to protect against pathogens and other abiotic stress, and thus the interaction between signaling networks of defense is incredible. This can be activated and express with the application of growth elicitors and antimicrobial natural compounds. In the present study we used natural polysaccharide, Chitosan (15kDa) against Grey mold in two grape varieties (Shine-muscat and Kyoho). The finding depicted that the interaction of DEG and KEGG in control and treated samples of grapevine, which provides the evidence for selection of gray mold related defense genes and chitosan for subsequent grapevine production/postharvest programs.

ORGANISM(S): Vitis vinifera

PROVIDER: GSE129046 | GEO | 2020/12/31

REPOSITORIES: GEO

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Project description:Chitosan has been widely used in food industry as a weight-loss aid and a cholesterol-lowering agent. Previous studies have shown that chitosan affects metabolic responses and contributes to anti-diabetic, hypocholestermic, and blood glucose-lowering effects; however, the in vivo targeting sites and mechanisms of chitosan remain to be clarified. In this study, we constructed transgenic mice which carried the luciferase genes driven by peroxisome proliferator-activated receptor (PPAR), a key regulator of fatty acid and glucose metabolism. Bioluminescent imaging of PPAR transgenic mice was applied to report the organs that chitosan acted on, and gene expression profiles of chitosan-targeted organs were further analyzed to elucidate the mechanisms of chitosan. Bioluminescent imaging showed that constitutive PPAR activities were detected in brain and gastrointestinal tract. Administration of chitosan significantly activated the PPAR activities in brain and stomach. Microarray analysis of brain and stomach showed that several pathways involved in lipid and glucose metabolism were regulated by chitosan. Moreover, the expression levels of metabolism-associated genes like apolipoprotein B (apoB) and ghrelin genes were down-regulated by chitosan. In conclusion, these findings suggested the feasibility of PPAR bioluminescent imaging-guided transcriptomic analysis on the evaluation of chitosan-affected metabolic responses in vivo. Moreover, we newly identified that downregulated expression of apoB and ghrelin genes were novel mechanisms for chitosan-affected metabolic responses in vivo . Mice (6 to 8 weeks old) were subcutaneously injected saline or 0.2 g/kg chitosan. Chitosan oligosaccharide lactate (MW=4000-6000, >90% deacetylation) was purchased from Sigma-Aldrich (St. Louis, MO, USA) and dissolved in DDW. For rosiglitazone treatment, mice were orally administered 50 mg/kg rosiglitazone. Mice were then imaged for the luciferase activity or sacrificed for microarray analysis at indicated periods.

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RNA-seq revealed counter effect of chitosan against Botrytis cinerea on grape berries

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