Research on Crops
Open Access
  • Year: 2014
  • Volume: 15
  • Issue: 1

Different modes of proline accumulation in response to saline-alkaline stress factors in rice (Oryza sativa L.)

  • Author:
  • Bing-Sheng Lv1, Xiao-Wei Li2, Hong-Yuan Ma2, Hao-Yu Yang2, Li-Xing Wei1, Hai-Yan Lv1, Chang-Jie Jiang3,, Zheng-Wei Liang2,4,
  • Total Page Count: 8
  • Page Number: 14 to 21

1University of Chinese Academy of Sciences, Beijing-100 049, China

2Da'an Sodic Land Experiment Station, Da'an, Jilin-131 317, China

3Disease Resistant Crop Research and Development Unit, National Institute of Agrobiological Sciences, Kannondai 2-1-2, Tsukuba-305 8602, Japan

4Key Laboratory of Soybean Molecular Design Breeding, Chinese Academy of Sciences, Harbin, Heilongjiang-150 081, China

North-east Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin-130 102, China

*E-Mail: cjjiang@affrc.go.jp

**liangzw@neigae.ac.cn

Online published on 27 March, 2014.

Abstract

Proline accumulation is a common physiological response to various abiotic stresses in plants. In this study, we show that rice seedlings accumulate proline to different levels in response to different saline-alkaline stress factors including osmotic, saline and alkaline stresses. Expression analysis of genes for proline biosynthesis (OsP5CS1, OsP5CS2 and OsP5CR) and catabolism (OsPDH1 and OsP5CDH) revealed up-regulation of the proline synthesis genes under osmotic and alkaline stresses. In comparison, under the salt stress, a decrease in catabolic enzyme gene expressions was observed. Our results suggest that rice seedlings employ different gene regulation in proline accumulation in response to different saline-alkaline stress factors.

Keywords

Proline accumulation, saline-alkaline stress, stress response, transcriptional regulation