Chemical constituents from Gnaphlium affine Chemical constituents from fruits of Vitex negundo Study on chemical constituents of Daphne gracilis Antidepression constituents from Angelica Sinensis Radix in Xiaoyao Powder Characteristics of dominant tree species stem sap flow and their relationships with environmental factors in a mixed conifer-broadleaf forest in Dinghushan, Guangdong Province of South China. Expression Analysis of 12 miRNA Families Specific to Conifers during Somatic Embryogenesis of Larch Isolation of total DNA from Pinaceae plants