Following the free nuclear development of the proembryo of Zamia, a cellular proembryo is formed in the base of the old archegonium. Scattered elsewhere in the old archegonium are a variable number of ...

As a part of a study dealing with the effects of external and internal sources of irradiation on developing plant embryos, barley embryos in varying stages of development have been subjected in situ ...

Embryos have two distinct ends, which become apparent early on. Quite how this initial polarity is sustained in plant embryos has been unclear. Step forward the agent provocateur of plant development ...