TITLE:
Effect of Low Temperature on Chlorophyll and Carotenoid Content on the Seedlings of Some Selected Boro Rice Varieties
AUTHORS:
Md. Omar Kayess, Md. Mahmudul Hassan, Md. Nurhasan, Kawsar Ahmed
KEYWORDS:
Low Temperature, BORO Rice Seedling, Proline, Chlorophyll, Carotenoid Content
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.11 No.2,
February
14,
2020
ABSTRACT: A study was conducted to screen out the
low-temperature tolerant Boro rice seedlings from November 2012 to January 2013
for facing the upcoming rice production challenge in Northwest Bangladesh. The
experimental time was characterized by a prevailing low environmental
temperature of below 15°C. Five rice cultivars (V1: BR-2; V2: BR-16;
V3: Pariza;
V4: Minicate; V5: BRRI
dhan 50)
were selected for the study. The leaf proline, chlorophyll content and total
carotenoid content were investigated. The V2 (BR-16) seedling synthesized the
higher leaf proline (1.228 g·g-1) at a low temperature than those of other tested cultivars. Again, the
highest amount of chlorophyll-a (3.957 g·g-1), chlorophyll-b (2.118 g·g-1), chlorophyll-a/b ratio (3.6754 mg·g-1) and total chlorophyll (5.051 g·g-1) was measured in V2 (BR-16). The maximum total carotenoid (1.213 g·g-1) was also observed in V2. In this experiment, the V2 (BR-16) showed
comparatively better potentiality to survive at low temperatures (below 15°C) than other varieties.