Figure 4From: Early PCD events in male gametophyte development of isopropyl-N-phenyl carbamate resistant Nicotiana sylvestrismutant linesDisturbances on the stage of late tetrad in N. sylvestris mutant plant anthers: 1 – dyad, 2 – triad, 3 – atypical tetrad, 4 – pentad, 5 – hexad, 6 – polyad. Bar = 0.005 mm.Back to article page