Abstract:
The experiment was conducted at the Research Field of the Sher-e-Bangla
Agricultural University, Dhaka-1207 during the period from November, 2018 to May,
2019 to investigate the role of halopriming (HP) in improving growth and yield of salt
stress (S) affected rice (Oryza sativa L. cv. BRRI dhan67) plant. The experiment
consists of nine treatments viz. T
1
=Control, T
2
= HP
1
(0.25 dSm
-1
), T
3
(0.5
dSm
-1
), T
4
= S
1
(8 dSm
-1
), T
5
= S
2
(12 dSm
-1
), T
6
= S
1
HP
1
(8 dSm
-1
= HP
2
+ 0.25 dSm
= S
1
HP
2
(8 dSm
-1
+ 0.5 dSm
-1
),T
8
= S
2
HP
1
(12 dSm
-1
+ 0.25 dSm
=
S
2
HP
2
(12 dSm
-1
+ 0.5 dSm
-1
) based on a randomized complete block design (RCBD)
with three replications. Data on different growth parameters, physiological parameters
and yield contributing characters of rice plants were recorded. Salt stress drastically
decreased plant height (cm), number of tillers plant
-1
, leaf area, SPAD meter reading (
chlorophyll measurement of leaf), days to flowering, number of effective tillers plant
1
, panicle length, number of fertile grains plant
-1
-1
-1
) and T
9
, number of unfertile grains plant
,
1000 seed weight, total weight of grains, dry weight of stem, leaf, root leaf membrane
stability index (LMSI), relative water content (RWC) and K contents in shoot and root
whereas as increased Na in root and shoot. Between two salinity level (S
1
and S
2
1
, 12 dSm
-1
), the damaging effect was higher in higher salinity level (S
2
). On the other hand, the damaging effects of salt stress were improved by
halopriming. The rice plants performed better in response to halopriming under salt
stress condition. Between the different levels, halopriming with 0.50 dSm
NaCl
(HP
2
) showed the better results in terms of growth, physiology, yield attributes and
yield.
Description:
A Thesis Submitted to
The Department of Agricultural Botany, Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka-1207
In partial fulfillment of the requirements
For the degree
Of
MASTER OF SCIENCE (MS)
IN
AGRICULTURAL BOTANY
SEMESTER: JANUARY-JUNE, 2018
