Author(s)

Md. Omar Kayess^1*, Md. Mahmudul Hassan², Md. Nurhasan³, Kawsar Ahmed⁴

¹Department of Genetics and Plant Breeding, Hajee Mohammad Danesh Science and Technology University, Dinajpur, Bangladesh.
²Upazila Agriculture Officer, Department of Agricultural Extension, Ministry of Agriculture, Chirirbandar, Dinajpur, Bangladesh.
³Agriculture Extension Officer, Department of Agriculture Extension, Ministry of Agriculture, Kaharole, Dinajpur, Bangladesh.
⁴Agriculture Extension Officer, Department of Agriculture Extension, Ministry of Agriculture, Biral, Dinajpur, Bangladesh.

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.

Low Temperature, BORO Rice Seedling, Proline, Chlorophyll, Carotenoid Content

Kayess, M. , Hassan, M. , Nurhasan, M. and Ahmed, K. (2020) Effect of Low Temperature on Chlorophyll and Carotenoid Content on the Seedlings of Some Selected Boro Rice Varieties. American Journal of Plant Sciences, 11, 125-136. doi: 10.4236/ajps.2020.112010.