Among the treatments, few of them significantly stimulated
seed germination (Figs. 1–3). Germination in UPS commenced onday 4 under 25 ◦C, and on day 6 in lowest temperature (10 ◦C)
while in primed seeds (PS) germination commenced on days 2,
3 and 4 in 25, 15 and 10 ◦C, respectively. However, germination
of unprimed seeds was significantly commenced later with lesser
slopes (Fig. 1). Higher temperature caused rapid germination in
UPS and PS. Germination started in primed seeds (PS1 and PS2)
on day 2 and 3 under 15 and 25 ◦C, respectively and on day 5
under 10 ◦C (Fig. 1). Osmopriming with
−0.8 and
−1.2 Mpa PEG
solution increased seed germination (20 and 30%) at the first four
days compared to UPS, thus confirming its role as a stimulatory
agent (Fig. 1). Results also indicated that Osmopriming with
−0.8
and −1.2 Mpa PEG solution accelerated seed germination of cumin
in drought stress as seed germination in UPS commenced on day 4
and 6 under
−0.8 and
−1.2 Mpa PEG solutions and on day 2 and 3 in
PS1 and PS2, respectively (Fig. 2). However drought stress significantly
decreased germination percentage and reduced germination
trend (Figs. 2 and 3).