Senescent Leaves of Artemisia annua are One of the Most Active Organs for Overexpression of Artemisinin Biosynthesis Responsible Genes upon Burst of Singlet Oxygen - Yang, Rui-Yi; Zeng, Xiao-Mei; Lu, Yuan-Yuan; Lu, Wen-Jie; Feng, Li-Ling; Yang, Xue-Qin; Zeng, Qing-Ping (Planta Medica, 2010)