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Exogenous Glycinebetaine Application Contributes to Abiotic Stress Tolerance in Maize
Journal of Plant Biology ( IF 2.9 ) Pub Date : 2020-07-10 , DOI: 10.1007/s12374-020-09265-3
Laming Pei , Hongmei Li , Yuanyuan Zhou , Weijun Li , Yuhang Jiang , Hui Li

Plant growth and development are adversely affected by various environmental stresses. In this study, we investigated the possible function of glycinebetaine (GB) in improving abiotic stress tolerance in maize plants by exogenous application. Results indicated that GB application could effectively improve maize germination percentages, biomass weights and grain yield per plant under abiotic stresses. Moreover, GB-treated plants showed higher reactive oxygen species (ROS)-scavenging capacities, therefore less oxidative destruction than control plants under stresses. In addition, abscisic acid (ABA) levels were increased in GB-treated plants compared to control plants. The comparison of transcriptome profile was performed to analyze the possible mechanism underlying the enhanced tolerance mediated by GB. Many differentially expressed genes (DEGs) between GB-treated and control plants were found to be involved in responses to oxidative stress, abiotic stress and ABA. Taken together, these results indicated that GB might enhance abiotic stress tolerance in maize by regulating ROS-scavenging capacities and ABA-mediated stress-responsive pathways.



中文翻译:

外源甘氨酸甜菜碱的应用有助于玉米的非生物胁迫耐受性

植物生长和发育受到各种环境压力的不利影响。在这项研究中,我们调查了甘氨酸甜菜碱(GB)通过外源施用改善玉米植物非生物胁迫耐受性的可能功能。结果表明,在非生物胁迫下,GB的施用可以有效提高玉米发芽率,生物量和单株籽粒产量。此外,GB处理的植物表现出更高的活性氧清除能力,因此在胁迫下比对照植物的氧化破坏更少。另外,与对照植物相比,GB处理的植物中脱落酸(ABA)水平增加。进行转录组图谱的比较以分析GB介导的耐受性增强的潜在机制。发现GB处理植物和对照植物之间的许多差异表达基因(DEG)参与了对氧化胁迫,非生物胁迫和ABA的反应。综上所述,这些结果表明,GB可能通过调节ROS清除能力和ABA介导的胁迫响应途径来增强玉米的非生物胁迫耐受性。

更新日期:2020-07-10
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