But microscopic
observations of the cross section of root nodules revealed
that the effective areas of N2-fixing zone were reduced in
plants grown in arsenic contaminated field (Fig.1). Effects
on nodulation and growth were recorded in each week after
seedling.We observed that the number of nodules and
growth of the plants were affected by the presence of
arsenic in composite.In first and second week nodule
number was highly affected by arsenic (Table1). It is clear
that arsenic produced a drastic effect in nodule number in
early stage of nodulation when the inoculum was prepared
without arsenic supplemented medium but it recovers when
the inoculum was prepared with arsenic supplemented
YEM medium.This is may be due to the effect of arsenic
onRhizobiumsurvivability and initial tolerance.