Shiba Masayuki, Kobayashi Nagisa, Harada Shiori, Fukuda Tatsuya
Graduate School of Integrative Science and Engineering, Tokyo City University, Tokyo, Japan.
Department of Natural Sciences, Faculty of Knowledge Engineering, Tokyo City University, Tokyo, Japan.
Front Plant Sci. 2024 Nov 8;15:1445437. doi: 10.3389/fpls.2024.1445437. eCollection 2024.
We conducted comparative analyses using an open-top chamber (OTC) to reduce wind stress to clarify the impact of decreased wind stress on the invasive species L. (Asteraceae), which ranks among the worst 100 species on the Invasive Alien Species List in Japan. Morphological analyses revealed that the number and size of leaves in the OTC group were significantly higher than those in the control group (wind). There was also a significantly higher investment in stems in the former than in the latter. No significant differences were observed in root dry mass; however, the resource allocation ratio to the roots was significantly higher in the wind group than in the OTC group. Although the total seed mass was greater in the OTC group, there were no significant differences in the ratio of resource allocation to seeds between the groups, and no significant differences were observed in the mass of each seed. However, the number of seeds was significantly higher in the OTC group. Adaptive changes in the leaves, stems, and roots to avoid and/or resist wind were reflected in differences in the number of seeds. In addition, a decrease in wind stress contributed to an increase in the number of seeds in . Such mechanisms are likely widespread because is often highly abundant in urban systems.
我们使用开顶式气室（OTC）进行了比较分析，以降低风应力，从而阐明风应力降低对入侵物种L.（菊科）的影响，该物种在日本外来入侵物种名单中位列最严重的100种物种之中。形态学分析表明，OTC组的叶片数量和大小显著高于对照组（有风组）。前者在茎上的投入也显著高于后者。根干质量未观察到显著差异；然而，有风组对根的资源分配比例显著高于OTC组。虽然OTC组的种子总质量更大，但两组之间种子资源分配比例没有显著差异，且每粒种子的质量也未观察到显著差异。然而，OTC组的种子数量显著更高。叶片、茎和根为避免和/或抵抗风而发生的适应性变化反映在种子数量的差异上。此外，风应力的降低导致了L.种子数量的增加。由于L.在城市系统中通常数量众多，这样的机制可能很普遍。
