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Agronomy 2018, 8(12), 279; https://doi.org/10.3390/agronomy8120279

Growth Performance and Antioxidant Enzyme Activities of Advanced Mutant Rice Genotypes under Drought Stress Condition

1
Department of Crop Sciences, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
2
Institute of Tropical Agriculture and Food Security, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
3
Agrotechnology and Biosciences Division, Malaysian Nuclear Agency, 43600 Kajang, Selangor, Malaysia
*
Author to whom correspondence should be addressed.
Received: 17 October 2018 / Revised: 2 November 2018 / Accepted: 3 November 2018 / Published: 26 November 2018
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Abstract

Drought stress affects various physiological and metabolic processes in rice (Oryza sativa L.) plant. Non-availability of high-yielding varieties suitable for cultivation under drought condition lead towards a sharp decline in rice yield. Induce mutation is an essential auxiliary approach to counterpart conventional breeding to produce stress-tolerance rice variety. The current study was aimed to identify two advanced mutant rice genotypes as drought-tolerant using growth parameters and antioxidant enzyme activities. The advanced mutant rice genotypes, MR219-4 and MR219-9, showed a minimal reduction on all growth parameters, yield, and yield components measured for drought tolerance. MR219-4 had a slight reduction on total dry weight and chlorophyll content under drought stress condition. Proline content increased significantly in drought-tolerant rice genotypes and the highest proline content was obtained from MR219-4 followed by MR219-9 under drought stress. Catalase, ascorbate peroxidase, and guaiacol peroxidase activities were significantly increased in drought stress treatment in all the rice genotypes. MR219-4 and MR219-9 were identified as high-yielding drought-tolerant genotypes as they maintained good performance under drought stress condition for all the measured traits compared to the drought-tolerant check varieties, Aeron1 and MR219, thus, this might be underlying selection criteria for a drought tolerance rice breeding programme. View Full-Text
Keywords: antioxidant enzyme; drought; chlorophyll content; proline content; rice antioxidant enzyme; drought; chlorophyll content; proline content; rice
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Kamarudin, Z.S.; Yusop, M.R.; Tengku Muda Mohamed, M.; Ismail, M.R.; Harun, A.R. Growth Performance and Antioxidant Enzyme Activities of Advanced Mutant Rice Genotypes under Drought Stress Condition. Agronomy 2018, 8, 279.

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