Zhang Chengming, Hiradate Syuntaro, Kusumoto Yoshinobu, Morita Sayaka, Koyanagi Tomoyo F, Chu Qingnan, Watanabe Toshihiro
Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan.
National Institute for Agro-Environmental Sciences (NIAES), Tsukuba, Japan.
Front Plant Sci. 2021 Mar 29;12:614613. doi: 10.3389/fpls.2021.614613. eCollection 2021.
Leaf ionome indicates plant phylogenetic evolution and responses to environmental stress, which is a critical influential factor to the structure of species populations in local edaphic sites. However, little is known about leaf ionomic responses of local plant species to natural edaphic mineral variations. In the present study, all plant species and soil samples from a total of 80 soil sites in Shiozuka Highland were collected for multi-elemental analysis. Ioniomic data of species were used for statistical analysis, representing 24 species and 10 families. Specific preferences to ionomic accumulation in plants were obviously affected by the phylogeny, whereas edaphic impacts were also strong but limited within the phylogenetic preset. Correlations among elements resulted from not only elemental synergy and competition but also the adaptive evolution to withstand environmental stresses. Furthermore, ionomic differences of plant families were mainly derived from non-essential elements. The majority of variations in leaf ionome is undoubtedly regulated by evolutionary factors, but externalities, especially environmental stresses also have an important regulating function for landscape formation, determining that the contributions of each factor to ionomic variations of plant species for adaptation to environmental stress provides a new insight for further research on ionomic responses of ecological speciation to environmental perturbations and their corresponding adaptive evolutions.
叶片离子组揭示了植物系统发育进化以及对环境胁迫的响应，这是影响当地土壤环境中物种种群结构的关键因素。然而，关于当地植物物种对天然土壤矿物质变化的叶片离子组响应，我们知之甚少。在本研究中，收集了静冈高地80个土壤位点的所有植物物种和土壤样本进行多元素分析。物种的离子组数据用于统计分析，涵盖24个物种和10个科。植物对离子组积累的特定偏好明显受系统发育影响，而土壤影响也很显著，但局限于系统发育预设范围内。元素之间的相关性不仅源于元素协同作用和竞争，还源于抵御环境胁迫的适应性进化。此外，植物科的离子组差异主要源于非必需元素。叶片离子组的大部分变异无疑受进化因素调控，但外部因素，尤其是环境胁迫对景观形成也具有重要调控作用，这决定了各因素对植物物种离子组变异以适应环境胁迫的贡献，为进一步研究生态物种形成对环境扰动的离子组响应及其相应的适应性进化提供了新的见解。
