Figure 4.

A) Longitudinally dissected megagametophyte of M. fraseri stored for 6 months showing the results of TZ assessment—both the cut test and TZ assessment indicated that this megagametophyte + embryo were viable; B) Longitudinally dissected megagametophyte stored for 6 months showing the results of TZ assessment—both the cut test and TZ assessment indicate that this megagametophyte + embryo were not viable due to the internal browning within the embryo region and lack of TZ staining in this area.