Fan Jibiao, Xu Jilei, Zhang Weihong, Amee Maurice, Liu Dalin, Chen Liang
College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu 225009, China.
Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China.
Plants (Basel). 2019 Sep 13;8(9):347. doi: 10.3390/plants8090347.
Excess salinity is a major environmental stress that limits growth and development of plants. Improving salt stress tolerance of plants is important in order to enhance land utilization and crop yield. Cold priming has been reported to trigger the protective processes in plants that increase their stress tolerance. Bermudagrass () is one of the most widely used turfgrass species around the world. However, the effect of cold priming on salt tolerance of bermudagrass is largely unknown. In the present study, wild bermudagrass was pre-treated with 4 °C for 6 h before 150 mM NaCl treatment for one week. The results showed that the cell membrane stability, ion homeostasis and photosynthesis process which are usually negatively affected by salt stress in bermudagrass were alleviated by short-term pre-cold treatment. Additionally, the gene expression profile also corresponded to the change of physiological indexes in bermudagrass. The results suggest that cold priming plays a positive role in improving salt stress tolerance of bermudagrass.
盐分过高是限制植物生长发育的主要环境胁迫因素。提高植物的耐盐胁迫能力对于提高土地利用率和作物产量至关重要。据报道，冷驯化可触发植物体内的保护过程，从而提高其胁迫耐受性。狗牙根（）是世界上使用最广泛的草坪草种之一。然而，冷驯化对狗牙根耐盐性的影响在很大程度上尚不清楚。在本研究中，野生狗牙根在150 mM NaCl处理一周前，先在4°C下预处理6小时。结果表明，短期冷预处理缓解了通常受盐分胁迫负面影响的狗牙根细胞膜稳定性、离子稳态和光合作用过程。此外，基因表达谱也与狗牙根生理指标的变化相对应。结果表明，冷驯化对提高狗牙根的耐盐胁迫能力具有积极作用。
