The main differences between emitter and collector are doping concentration and size. The emitter is heavily doped, while the collector is lightly doped. You could try to swap them, but you'll get a very low \$H_{FE}\$, probably even less than 1.
Image Credit: Photo: Oxmoor House. SEASON: Although available year-round, eggplant is at its peak from July to October. CHOOSING: When selecting, look for eggplants with firm, glossy skin. Size and color vary widely among types, but the eggplant should feel heavy. Avoid those with wrinkled skin, soft spots, or brown patches.
There is no particular eggplant seed preparation necessary prior to sowing. Eggplant seeds germinate at temps between 60-95 degrees F. (15-35 C) and seedlings will emerge in 7-10 days. When growing with eggplant seeds instead of nursery starts, the seeds will remain viable for about four years.