College of Agriculture, Henan University of Science and Technology, Luoyang, China; Luoyang Key Laboratory of Symbiotic Microorganism and Green Development, Luoyang, China; Henan Engineering Research Center of Human Settlements, Luoyang, China.
College of Agriculture, Henan University of Science and Technology, Luoyang, China; Luoyang Key Laboratory of Symbiotic Microorganism and Green Development, Luoyang, China; Henan Engineering Research Center of Human Settlements, Luoyang, China.
Sci Total Environ. 2024 Nov 1;949:175117. doi: 10.1016/j.scitotenv.2024.175117. Epub 2024 Jul 29.
Mycorrhiza is an important functional feature of plants, which plays a vital role in regulating plant phenology in response to environmental changes. However, the effect of mycorrhiza on plant phenological asymmetry in response to climate changes is still rarely reported. Based on a global database of mycorrhizal statuses (obligately mycorrhizal, OM and facultatively mycorrhizal, FM) and phenology, we demonstrated that mycorrhizas reduce the phenological mismatches between above- and below-ground plant responses to climate warming under OM status. The mismatch of above- and below-ground growing season length of FM plants to warming was as high as 10.65 days, 9.1925 days and 12.36 days in total, herbaceous and woody plants, respectively. The mismatch of growing season length of OM plants was only 2.12 days, -0.61 days and 7.64 days among plant groups, which was much lower than that of FM plants. Correlation analysis indicated that OM plants stabilized plant phenology by regulating the relationship between the start of the growing season and the length of the growing season. Path analysis found that herbaceous plants and woody plants reduced phenological mismatches by stabilizing below-ground and above-ground phenology, respectively. In exploring the effects of mycorrhizal status on early- or late-season phenophases, we found that different mycorrhizal statuses affected the response of early- or late-season phenophase to warming. OM promoted the advance of early-season phenophase, and FM promoted the delay of late-season phenophase among different plant groups. In different regions, OM and FM promoted the advance of early-season phenophase in temperate and boreal regions, respectively. Our results indicate that mycorrhizal status mediates plant phenological response to warming, so the potential effects of mycorrhizal status should be considered when studying plant phenology changes.
菌根是植物的一个重要功能特征，它在调节植物物候对环境变化的响应方面起着至关重要的作用。然而，菌根对植物物候对气候变化的非对称性的影响却很少有报道。基于一个全球的菌根状态（专性菌根，OM 和兼性菌根，FM）和物候数据库，我们证明了在 OM 状态下，菌根减少了地上和地下植物对气候变暖响应的物候不匹配。FM 植物地上和地下生长季节长度对变暖的不匹配高达 10.65 天、9.1925 天和 12.36 天，分别为草本植物和木本植物。OM 植物的生长季节长度不匹配仅为 2.12 天、-0.61 天和 7.64 天，远低于 FM 植物。相关分析表明，OM 植物通过调节生长季节开始和生长季节长度之间的关系来稳定植物物候。路径分析发现，草本植物和木本植物通过稳定地下和地上物候来减少物候不匹配。在探索菌根状态对早期或晚期物候期的影响时，我们发现不同的菌根状态影响了早期或晚期物候期对变暖的响应。OM 促进了早期物候期的提前，FM 促进了不同植物群落在晚期物候期的延迟。在不同地区，OM 和 FM 分别促进了温带和寒带地区早期物候期的提前。我们的结果表明，菌根状态介导了植物对变暖的物候响应，因此在研究植物物候变化时应考虑菌根状态的潜在影响。
