J. Hrib et al., Protein bodies in the pine megagametophyte in vitro culture: ultrastructural, histochemical and electrophoretic observations, BIOL PLANT, 43(3), 2000, pp. 329-336
The megagametophytes of the European black pine (Pinus nigra Am.) were cult
ured on modified MS medium. After 10 d, protein bodies showed well-marked d
egradation on freeze-etched replicas and in preparations observed by scanni
ng electron microscopy. After 20 d of cultivation, the megagametophyte cell
s were completely empty. Proteins secreted into the agar medium were determ
ined by electrophoresis and 15 different proteins, in the range of 6.5 to 7
1 kDa, were identified.