TY - J Integr Plant Biol A1 - Liu Cheng-yun T1 - Enzymatic Isolation of Archegonium of Pinus Yunnanensis Fr. and Observations on the Proembryo Development Y1 - JF - Journal of Integrative Plant Biology JO - J Integr Plant Biol SP - EP - VL - 28 IS - 5 UR - https://www.jipb.net N1 - ER -