Scarifiation with H2SO4
Scarifiation of R. capitata seed with H2SO4 induced
seed germination in all treatments (Figure 1). The seed
germination percentage increased with increasing soaking
time (up to 80 min) and began to decrease with the further
increase in soaking time. Seeds soaked in H2SO4 for 60
and 80 min had the most rapid response time with 50%
of the seeds germinating in all replicates within 0.66 and
0.80 d, respectively (Figure 2). Minimum MGT (2.09
and 2.15 d) was detected with 60 and 80 min of soaking
in H2SO4. Maximum GI was recorded when seeds were
soaked in H2SO4 for 60 min. There was no germination in
the control treatment