Priming effect of abscisic acid on alkaline stress tolerance in rice (Oryza sativa L.) seedlings
| 第一作者： |
魏立兴 |
| 英文第一作者： |
Wei, L. X. |
| 联系作者： |
梁正伟，姜昌杰 |
| 英文联系作者： |
Liang, Z. W., Jiang, C. J. |
| 发表年度： |
2015 |
| 卷： |
90 |
| 摘要： |
Saline alkaline stress is characterized by high salinity and high alkalinity (high pH); alkaline stress has been shown to be the primary factor inhibiting rice seedling growth. In this study, we investigated the potential priming effect of abscisic acid (ABA) on tolerance of rice seedlings to alkaline stress simulated by Na2CO3. Seedlings were pretreated with ABA at concentrations of 0 (control), 10, and 50 mu M by root-drench for 24 h and then transferred to a Na2CO3 solution that did not contain ABA. Compared to control treatment, pretreatment with ABA substantially improved the survival rate of rice seedlings and increased biomass accumulation after 7 days under the alkaline condition. ABA application at 10 mu M also alleviated the inhibitory effects of alkaline stress on the total root length and root surface area. Physiologically, ABA increased relative water content (RWC) and decreased cell membrane injury degree (MI) and Na+/K+ ratios. In contrast, fluridone (an ABA biosynthesis inhibitor) decreased the RWC and increased MI in shoots under the alkaline conditions. These data suggest that ABA has a potent priming effect on the adaptive response to alkaline stress in rice and may be useful for improving rice growth in saline alkaline paddy fields. |
| 刊物名称： |
Plant Physiology and Biochemistry |
| 参与作者： |
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