Sako Kaori, Sunaoshi Yuji, Tanaka Maho, Matsui Akihiro, Seki Motoaki
a Plant Genomic Network Research Team , RIKEN Center for Sustainable Resource Science, Yokohama , Kanagawa , Japan.
d CREST, JST , Kawaguchi, Saitama , Japan.
Plant Signal Behav. 2018;13(8):e1500065. doi: 10.1080/15592324.2018.1500065. Epub 2018 Aug 1.
High-salinity stress affects plant growth and crop yield, so the development of techniques to enhance plant tolerance to such stress is important. Recently, we revealed that ethanol enhances high-salinity stress tolerance in Arabidopsis thaliana and rice by detoxifying Reactive Oxygen Species (ROS). However, we did not investigate how long salt stress tolerance was maintained following treatment with ethanol. Therefore, we herein analyzed survival rates and expression levels of AtZAT12, which is a transcriptional factor of ROS detoxification enzymes, under different conditions in Arabidopsis. Our results showed that ethanol-mediated high-salinity stress tolerance was lost after a 24 h break in ethanol treatment in ~ 1-week-old plants. Although ethanol enhanced salt stress tolerance, high concentrations of ethanol negatively affected plant growth. Thus, these data support the idea that adjustments of the frequency and amount of ethanol application to plants is useful to enhance salt stress tolerance without growth inhibition in the agricultural field.
高盐胁迫会影响植物生长和作物产量，因此开发提高植物对这种胁迫耐受性的技术很重要。最近，我们发现乙醇通过清除活性氧（ROS）来增强拟南芥和水稻对高盐胁迫的耐受性。然而，我们没有研究用乙醇处理后盐胁迫耐受性能维持多长时间。因此，我们在此分析了拟南芥在不同条件下AtZAT12（一种ROS解毒酶的转录因子）的存活率和表达水平。我们的结果表明，在约1周龄的植物中，乙醇处理中断24小时后，乙醇介导的高盐胁迫耐受性丧失。虽然乙醇增强了盐胁迫耐受性，但高浓度的乙醇对植物生长有负面影响。因此，这些数据支持这样一种观点，即在农业领域中调整向植物施用乙醇的频率和量，有助于在不抑制生长的情况下增强盐胁迫耐受性。
