New discovery of natural product nanoparticles constructed from active metabolites from Chaetomium brasiliense for immunity to brown spot of rice var. RD 47
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Abstract
Natural product nanoparticles constructed from active metabolites from Chaetomium brasiliense is firstly presented as a new elicitor for immunity to brown spot of rice var. RD 47 caused by Drechslera oryzae. The nano-CBH, nano-CBE, nano-CBM from C. brasiliense at 15 μg/ml are treated to rice leaves after 3 days expressed Rf of 0.61 which supposing to be Oryzalexin C. Moreover, ethyl acetate, hexane and methanol crude extract derived from C. brasiliense that shown to be inhibited D. oryzae which the ED50 were 0.24, 0.32 and 0.35 μg/ml, respectively. Nano-CBH, nano-CBE, nano-CBM inhibited D. oryzae with ED50 values of 5.86, 4.92, and 2.86 μg/ml, respectively. All nanoparticles derived from C. brasiliense were more actively responded to suppress the pathogen inoculum of D. oryzae at the lower concentration than crude extracts at lower concentrations.
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