Physiological and molecular characterization of drought responses and screening of drought tolerant rice varieties

Authors

  • Loo Lean Fen Universiti Putra Malaysia
  • Mohd Razi Ismail Universiti Putra Malaysia
  • B. Zulkarami Universiti Putra Malaysia
  • Mohammad Shukri Abdul Rahman Universiti Putra Malaysia
  • M. Robiul Islam Rajshahi University

DOI:

https://doi.org/10.14393/BJ-v31n3a2015-23461

Keywords:

Drought stress, Leaf rolling score, Drought score, Rice, OsLEA 30 gene

Abstract

Drought stress has now become a severe threat to ensure food security in the developing world as well as in Malaysia. To dertermine physiological and molecular determinants of drought stress and screeneng of drought tollarent rice varieties, an experiment was conducted in a greenhouse at Universiti Putra Malaysia using eleven rice varieties and two irrigation regimes (well irrigated and water stressed). The present study indicated that traditional rice variety Puteh Perak and Siam is superior drought tolerant while IRRI 2011- IRLON Plot no: 064, MR 220 and BRRI Dhan 56 are moderately drought tolerant and IRRI 2011- IRLON Plot no: 050 and MR 84 are drought sensitive rice variety. Drought tolerance of those varieties were measured based on rate of tiller reduction, leaf rolling score and drought score during water stress condition. Leaf rolling score was positively correlated to drought score, chlorophyll content and proline accumulation. Significant increase in the proline accumulation and antioxidant enzyme activities (peroxidase and catalase) were also observed under drought stress in all the rice varieties except Siam and Puteh Perak. All the rice varieties including drought tolerant and sensitive variety showed the existence of OsLEA 30 genes.

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Published

2015-05-06

How to Cite

FEN, L.L., ISMAIL, M.R., ZULKARAMI, B., RAHMAN, M.S.A. and ISLAM, M.R., 2015. Physiological and molecular characterization of drought responses and screening of drought tolerant rice varieties . Bioscience Journal [online], vol. 31, no. 3, pp. 709–718. [Accessed28 November 2022]. DOI 10.14393/BJ-v31n3a2015-23461. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/23461.

Issue

Section

Agricultural Sciences