2.5.1.79 embryo strong ACL5 expression is present in the procambial cells of the embryo 759258 2.5.1.79 embryo strong ACL5 expression is present in the procambial cells of the embryo and in the megagametophyte cells destined to die via morphologically necrotic cell death 759258 2.5.1.79 flower stems and flowers contain two- to threefold more thermospermine compared to whole seedlings and mature leaves 723444 2.5.1.79 leaf - 739304 2.5.1.79 leaf stems and flowers contain two- to threefold more thermospermine compared to whole seedlings and mature leaves 723444 2.5.1.79 megagametophyte strong ACL5 expression is present in the megagametophyte cells destined to die via morphologically necrotic cell death 759258 2.5.1.79 root - -, 739287 2.5.1.79 seed in developing seeds, the expression of both ACL5 and diamine oxidase increases as embryogenesis proceeds 759258 2.5.1.79 seedling - -, 689505, 739287 2.5.1.79 seedling stems and flowers contain two- to threefold more thermospermine compared to whole seedlings and mature leaves 723444