Plant Physiology Reports

, Volume 24, Issue 3, pp 376–387 | Cite as

Proline and carbohydrate metabolism in rice varieties (Oryza sativa L.) under various drought and recovery conditions

  • Doan Cong DienEmail author
  • Thieu Thi Phong Thu
  • Kyi Moe
  • Takeo Yamakawa
Original Article


Drought stress is a main limitation of rice production in many regions worldwide, as most improved rice varieties are not drought tolerant. This study analyzed the effects of various drought stresses and subsequent recovery on dry weight accumulation and biochemical characteristics of different rice varieties (the drought-tolerant variety DA8, the drought-sensitive variety Malagkit Pirurutong, and the fast-recovering variety Kinandang Patong). The water treatments were irrigated (control), drought stress, and subsequent re-watering. The results showed that under the same drought stress level, DA8 retained higher water content than the other varieties. In addition, water content in sheaths was higher than that in leaves. DA8 obtained a higher dry weight accumulation than the other varieties under both the control and drought conditions. Proline content in all varieties increased significantly after drought stress. In addition, it accumulated more in leaves than in sheaths. DA8 expressed a higher ability to accumulate proline than Malagkit Pirurutong or Kinandang Patong. Total soluble sugar and starch contents of the three varieties decreased under drought stress compared to control. However, the change in total soluble sugar and starch levels depended not only on the drought stress condition but also on the environment and variety. Proline-accumulating ability under drought stress may be a useful indicator of the drought tolerance of rice.


Drought stress Proline metabolism Rice Soluble sugar Starch 



This research was supported by a Monbukagakusho Scholarship from the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT). The authors would like to thank Dr. Toshihiro Mochizuki, Agricultural Ecology Laboratory, Faculty of Agriculture, Kyushu University, for providing research facilities.


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Copyright information

© Indian Society for Plant Physiology 2019

Authors and Affiliations

  1. 1.Laboratory of Plant Nutrition, Graduate School of Bioresource and Bioenvironmental Sciences, School of AgricultureKyushu UniversityFukuokaJapan
  2. 2.Department of Cultivation Science, Faculty of AgronomyVietNam National University of AgricultureHa NoiViet Nam
  3. 3.Laboratory of Plant Nutrition, Division of Molecular Biosciences, Department of Bioscience and Biotechnology, Faculty of AgricultureKyushu UniversityFukuokaJapan

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