Fig. 2

SEM micrographs of cowpea exposed to different plasma exposure times [(a) non-treated, (b,c) and (d) treating seeds with plasma for 1.0, 2.0 and 3.0-min, respectively]. The images are shown at different scales as indicated.

SEM micrographs of cowpea exposed to different plasma exposure times [(a) non-treated, (b,c) and (d) treating seeds with plasma for 1.0, 2.0 and 3.0-min, respectively]. The images are shown at different scales as indicated.