Feng Di, Zhang Mingxia, Xu Jianhua, Gao Qian, Liu Jiao, Li Caixia, Sun Xiaoan, Xu Wanli
Key Laboratory of Saline-alkali Soil Improvement and Utilization (Saline-alkali Land in Arid and Semiarid Regions), Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumchi, China.
Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.
Front Plant Sci. 2025 Apr 7;16:1478692. doi: 10.3389/fpls.2025.1478692. eCollection 2025.
Cold stress (CS) is one of the main factors that limits the crop or plant growth and development in many regions of the world. Many researchers have been endeavoring to break the natural temperature barrier to grow plants in extremely cold areas or to alleviate erratic cold devastation on crops in temperate or subtropical regions for years. Numerous studies and research papers published recently for the last two decades have proven that exogenous substances (ESs) are effective and practical in helping plants tolerate CS. Here, we systematically summarize and characterize all 72 ESs that have been tried against CS, analyze research hotspots in the Web of Science database from 2000 to 2024 using VOSviewer with the keywords "cold stress" and "exogenous substances", and grouped them accordingly. Based on their underlying mechanisms, five categories of ESs are clearly defined, described and discussed: 1) enhancement of cell osmotic adjustment, 2) improvement of antioxidant pathways, 3) involvement in phytohormone regulation, 4) promotion of photosynthesis; 5) enrichment of nutritional status. After clarifying these five categories, a detailed plant responses and their possible interactions through a signal cross-talk are proposed and followed by discussions on future perspectives on using ESs to fortify plants against CS. The accumulative knowledge and information provided here will be ultimately used to increase plant productivity and agricultural sustainability under CS through chemical and microbial approaches.
冷胁迫（CS）是限制世界许多地区作物或植物生长发育的主要因素之一。多年来，许多研究人员一直在努力打破自然温度障碍，以便在极寒地区种植植物，或减轻温带或亚热带地区作物遭受的不稳定冷害。最近二十年来发表的大量研究和论文证明，外源物质（ESs）在帮助植物耐受冷胁迫方面是有效且实用的。在此，我们系统地总结并描述了所有72种已被尝试用于应对冷胁迫的外源物质，使用VOSviewer以“冷胁迫”和“外源物质”为关键词分析了2000年至2024年Web of Science数据库中的研究热点，并据此进行了分类。基于其潜在机制，明确界定、描述并讨论了五类外源物质：1）增强细胞渗透调节；2）改善抗氧化途径；3）参与植物激素调节；4）促进光合作用；5）丰富营养状况。在阐明这五类物质后，提出了详细的植物反应及其通过信号串扰可能存在的相互作用，随后讨论了利用外源物质增强植物抗冷胁迫能力的未来前景。此处提供的累积知识和信息最终将用于通过化学和微生物方法提高冷胁迫条件下的植物生产力和农业可持续性。
