Subcellular localization of wt-PhHA78scSEC in developing Arabidopsis seeds by IEM. A, Gold label was mainly found in the extracellular space. B and C, Label was also found in association with the Golgi apparatus. B, The marginal rims/attached dense vesicles and vesicles budding from the Golgi are labeled (arrows). C, Label was also found in more central parts of the Golgi apparatus. CW, Cell wall; EC, extracellular space; rER, rough ER. Bars = 200 nm.