Abstract:
A pot experiment with BRRI dhan48 was conducted at the Experimental shed of the
Department of Agronomy, Sher-e Bangla Agricultural University, Bangladesh during
the summer season (April-August) to investigate the role of exogenous sodium
nitroprusside (SNP) in growth and yield of rice under different cadmium stress
condition. The experiment was carried out ten cadmium stress treatments viz. control
(without cadmium), control+SNP (without cadmium with 0.2 mM SNP), Cd0.5 (0.5
mM CdCl
2
), Cd0.5+SNP (0.5 mM CdCl
2
with 0.2 mM SNP), Cd1 (1 mM CdCl
2
),
Cd1+SNP (1 mM CdCl
2
with 0.2 mM SNP), Cd1.5 (1.5 mM CdCl
2
) and Cd1.5+SNP
(1.5 mM CdCl
2
with 0.2 mM SNP), Cd2 (2 mM CdCl
2
) and Cd2+SNP (2 mM CdCl
2
with 0.2 mM SNP). Cadmium stresses significantly reduced the plant height and
tillers hill
-1
at all growth duration. Leaf relative water content (RWC) and chlorophyll
(chl) content also reduced due to cadmium stresses. At harvest, cadmium stresses
reduced the effective tillers hill
-1
, number of filled grains panicle
-1
, 1000-grain weight,
grain yield, straw yield and harvest index. On the other hand, exogenous application
of sodium nitroprusside (SNP) improved the plant height, effective tillers hill
,
panicle length, filled grains panicle
-1
, 1000-grain weight, straw yield and grain yield
upto 1 mM cadmium stress. But SNP application could not improve crop growth
parameters, physiological parameters and yield at higher level of cadmium stress (1.5
and 2 mM CdCl
2
) significantly.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfilment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
AGRONOMY
