Structural Identification of Siderophore∧AH18 from Bacillus subtilis AH18, a Biocontrol agent of Phytophthora Blight Disease in Red-pepper

The siderophore () of Bacillus subtilis AR18 was determined to be one of catechol type and purified by using Amberlite XAD-2, Sephadex LR-20 chromatography, and reversed-phase RPLC. The was identified bacillibactin with its structure by GC-MS, -NMR, and -NMR. (bacillibactin) had been confirmed its molecular weight of 883 and chemical structure of . Purified showed strong biocontrol ability towards the spore of Phytophthora capsici on PDA and able to effectively suppress (55%) P. capsici causing red-pepper blight in the pot in vivo test.