| dc.contributor.advisor | Professor Dr. Bikash Chandra Sarker | |
| dc.contributor.author | BASUNIA, SUBOTH CHANDRA | |
| dc.date.accessioned | 2022-04-25T05:24:12Z | |
| dc.date.available | 2022-04-25T05:24:12Z | |
| dc.date.issued | 2015-06 | |
| dc.identifier.uri | http://localhost:8080/xmlui/handle/123456789/857 | |
| dc.description | Rice is one of the most important crops, being a staple food for half of the world
population. It is produced annually at worldwide levels of more than 600 million tons and
will be more than 800 million tons as early as 2025 (Green et al., 2005). Unlike the other
major cereals, more than 90% of rice is consumed by humans (Tuteja et al., 2012).
Approximately, half of the world’s population derives a significant proportion of their
caloric intake from rice consumption. Rice sector contributes one-half of the agricultural
GDP and one-sixth of the national income in Bangladesh (BRRI, 2011). Bangladesh has a
large agrarian base with 76% of total population living in the rural areas and 90% of the
rural population directly related with agriculture. The population growth rate is two
million per year. According to this rate, the total population will become 233.2 million
within 2050 (BBS, 2008). However, she faces a tremendous challenge for providing food
security to the increasing population. Therefore, it is imperative to increase rice
production in order to meet the growing demand for food emanating from population
growth.
Stress in physical | en_US |
| dc.description.abstract | A study was conducted to screen out the low temperature tolerant Boro rice
seedlings during the period of December, 2014 to January, 2015, Hajee
Mohammad Danesh Science and Technology University, Dinajpur. The
experiment time was characterized by prevailing low environmental
temperature of below 15oC. Eight rice cultivars (V1: Pariza; V2:
BRRIdhan29; V3: Shaita boro; V4: BRRIdhan28; V5: Jotapari; V6: BR-16;
V7: Pashushail; V8: Hybrid dhan SL-8H) from both local, and HYV origin
were selected for the study. Two temperature regime was applied for
seedling culture. Ambient temperature (T0) was for field investigation and
4
oC temperature (T1) environment was maintained only for physiological
parameters. The changes of leaf proline, chlorophyll content, seedling shoot
length, shoot weight, root length and root weight were investigated. The V8
(Hybrid dhan SL.-8H) and V2 (BRRIdhan29) seedling synthesized the higher
leaf proline at low temperature than those of other tested cultivars. The
highest amount of chlorophyll-a, was in V8T0 seedlings (10.03 mg g
-1
), while
chlorophyll-b (2.063 mg g
-1
) and total carotenoid (4.0470 mg g
-1
) were the
highest in V3T0. The highest chlorophyll-a/b ratio (6.729 mg) was observed
in V7T0. The highest shoot length was measured in V1 (10.11 mm at 30
DAS) and the highest shoot dry weight was found in V8 (84.03 mg at 30
DAS). Again, the highest root length (5.713 mm) and root dry weight (44.83
mg) was measured in V8 at 30 DAS. In this study, the V8 cultivars (among
the HYV and local cultivars) showed comparatively better potentiality to
survive at low temperature (below 15oC) by over synthesizing proline,
chlorophyll-a, chlorophyll-b and higher partitioning dry biomass in root and
shoot. The study inferred that HYV, V8 (Hybrid dhan SL-8H) might be
selected for cultivating as boro rice in the low temperature environment in
Northwest Bangladesh. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | HAJEE MOHAMMAD DANESH SCIENCE AND TECHNOLOGY UNIVERSITY, DINAJPUR. | en_US |
| dc.subject | INVESTIGATION OF LOW TEMPERATURE | en_US |
| dc.subject | BORO RICE SEEDLINGS | en_US |
| dc.subject | SCREENING IN NORTHWEST | en_US |
| dc.title | INVESTIGATION OF LOW TEMPERATURE EFFECT ON BORO RICE SEEDLINGS FOR SCREENING IN NORTHWEST BANGLADESH | en_US |
| dc.type | Thesis | en_US |
