After submergence, elongation of all plants was observed
in both the genotypes. The control plants of both
FR13A and FR43B elongated as much as 30 cm during
submergence. The depth of water, however, was sufficient
to keep all plants completely submerged. However,
a minor difference in the rate of elongation was observed
with increase in radiation dosage. The average elongation
of FR13A with GR 20 Kr and 25 Kr was 31.2 cm and
35 cm respectively (Table 3). Similarly, the elongation of
FR43B with 20 Kr and 25 Kr was 30.2 and 33.5cm
respectively. The submergence tolerance testing at 30 Kr
dosages could not be performed because there was no
germination of calli at 30 Kr dosages in both the genotypes.