| 摘要: |
| 气候变化导致的温度升高对温带森林光合作用及其地理分布格局产生了显著影响。栎类树种是温带森林的重要组成部分,但其升温条件下的光合作用表现和分布格局变化尚未得到充分研究。该文以辽东栎(Quercus liaotungensis)、猩红栎(Q. coccinea)和北美红栎(Q. rubra)为研究对象,结合冠层和叶片2个层面,探讨了它们的光合系统高温适应性,及其对地理分布格局的影响。结果表明:(1)3种栎类光合系统高温适应性存在显著性差异,直接影响其地理分布格局。(2)冠层层面,辽东栎在高温条件下表现出较强的光合能力,其光合系统高温适应性较强。(3)叶片层面,高温下辽东栎的光系统Ⅱ(photosystem Ⅱ, PS Ⅱ)具有较强的稳定性,尤其是PS Ⅱ至光系统Ⅰ(photosystem Ⅰ, PS Ⅰ)的电子传递链。相比之下,猩红栎和北美红栎光合系统高温适应性较弱,极端高温出现时,其光化学活性显著下降。综上认为,3种栎类光合系统的高温响应机制决定了它们的温度适应性,从而影响了地理分布格局。该研究为气候变化背景下栎类树种分布格局变化的预测提供了新的视角,强调了光合作用在树种适应性中的关键作用,对温带森林生态系统的演变和森林管理具有重要的理论意义。 |
| 关键词: 辽东栎, 猩红栎, 北美红栎, 气候变化, 光合系统, 高温适应性 |
| DOI：10.11931/guihaia.gxzw202410036 |
| 分类号:Q945 |
| 文章编号:1000-3142(2025)08-1465-10 |
| 基金项目:山西省林草重点研发项目(JLYF-2025-28); 2025年中央财政林业科技推广示范项目(晋 [2025]TG10)。 |
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| Impacts of high temperature adaptability of photosynthetic systems in three Quercus species on their distribution under climate change |
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WANG Limin1, ZHOU Shuai2, 3*
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1. Shanxi Forestry Vocational Technical College, Taiyuan 030009, China;2. Shanxi Academy of Forestry and Grassland
Sciences, Taiyuan 030012, China;3. College of Forestry, Shanxi Agricultural University, Taigu 030800, Shanxi, China
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| Abstract: |
| Climate change-induced temperature rise significantly influences the photosynthesis and geographic distribution patterns of temperate forests. Quercus species are pivotal components of temperate forests, yet their photosynthetic performance and distribution under warming conditions remain insufficiently studied. This paper focuses on Quercus liaotungensis, Q. coccinea, and Q. rubra, investigating their photosynthetic system's adaptability to high temperature at both canopy and leaf levels and its influence on geographic distribution patterns. The results were as follows:(1)Significant variation in high-temperature adaptability among the three Quercus species, which directly impacted their geographic distribution patterns.(2)At the canopy level, Q. liaotungensis exhibited stronger photosynthetic capacity under high temperature, indicating robust adaptability to high temperatures.(3)At the leaf level, its photosystem Ⅱ(PS Ⅱ)showed enhanced stability under high temperature, particularly in the electron transfer chain from PS Ⅱ to photosystem Ⅰ(PS Ⅰ). In contrast, Q. coccinea and Q. rubra demonstrated weaker adaptability to high temperature, with significant declines in photochemical activity under high temperature. Overall, the high-temperature response mechanisms of three Quercus species determine their temperature adaptability, thereby influencing their geographic distribution patterns. This study offers a novel perspective on predicting changes in the distribution patterns of Quercus species under climate change, emphasizing the critical role of photosynthesis in species adaptability and its theoretical significance for the evolution of temperate forest ecosystems and forest management. |
| Key words: Quercus liaotungensis, Quercus coccinea, Quercus rubra, climate change, photosynthetic system, high temperature adaptability |
