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Research on Crops

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

DOI: 10.5958/j.2348-7542.15.1.002    | Article Id: 002 | Page : 14-21
Citation :- Different modes of proline accumulation in response to saline-alkaline stress factors in rice (Oryza sativa L.). Res. Crop. 15: 14-21
Bing-Sheng Lv, Xiao-Wei Li, Hong-Yuan Ma, Hao-Yu Yang, Li-Xing Wei, Hai-Yan Lv, Chang-Jie Jiang, Zheng-Wei Liang cjjiang@affrc.go.jp; liangzw@neigae.ac.cn
Address : North-east Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, Jilin-130 102, China; 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
Online Published:

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.

References

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