Dependence of UV-B-induced camptothecin production on nitrate reductase-mediated nitric oxide signaling in Camptotheca acuminata suspension cell cultures - Jiazhao Ruan; Jinjie Zhang; Mengya Li; Yun Zhu; Lina Sun; Haihong Jin; Hu Su; Maojun Xu (Plant Cell, Tissue and Organ Culture (PCTOC), 2014)