Affiliation:
1. College of Agronomy and Biotechnology , Yunnan Agricultural University , Kunming 650201 , P.R. China
2. College of Agronomy and Biotechnology , Yunnan Agricultural University , Kunming 650201 , P.R. China , e-mail:
Abstract
Abstract
Two new defensive constituents, solatuberenol A (1) and 3-O-β-d-glucopyranosyl stigmasta-5(6),24(28)-diene (2), were isolated from the potato tubers (Solanum tuberosum) infected with late blight disease. Their structures were identified by extensive spectroscopic analysis, including HRMS, IR, UV, 1D/2D NMR, ECD and quantum chemical calculations. Compounds 1 and 2 showed moderate activity against Phytophthora infestans with mycelia-growth inhibition of 30.1% and 52.4%, respectively, at the concentration of 500 ppm.