气候变化下三种栎类光合系统高温适应性对其分布的影响
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中图分类号：Q945 文献标识码：A 文章编号：1000-3142（2025）08-1465-10
Abstract： Climate change-induced temperature rise significantlyinfluences the photosynthesis and geographic distribution pattrnsof temperate forests.Quercusspeciesare pivotalcomponentsof temperateforests，yettheir photosynthetic performanceand distribution patterns under warming conditions remain insuffciently studied.This paper focuses on Quercus liaotungensis，Q. coccinea，and Q .rubra，investigating their photosynthetic system's adaptability to high temperature atboth canopyand leaf levelsand its influenceongeographic distribution paterns.Theresults were as follows：（1） There were significant variation in high-temperature adaptabilityof the photosynthetic systems among the three Quercus species，which directly impacted their geographic distribution patterns.（2）At the canopy level， Q liaotungensis exhibited stronger photosynthetic capacityunder high temperature，indicating robustadaptabilityof its photosyntheticsystem tohightemperatures.（3）Atthe leaf level，itsphotosystemI（PSII）showed enhanced greater stabilityunder high temperature，particularlyin theelectron transferchain from PSI to photosystem I（PSI）.In contrast， Q .coccinea and Q .rubra demonstrated weaker adaptability of their photosynthetic systems to high temperature， withsignificantdeclinesin photochemicalactivityunderextremelyhigh temperature.Overall，thehigh-temperature response mechanisms of the photosynthetic systems of three Quercus species determine their temperature adaptability， therebyinfluencing theirgeographic distributionpaterns.Theresultsof the studyofersanovel perspectiveonpredicting changes in the distribution patterns of Quercus species under climate change，emphasizing the critical role of photosynthesis inspeciesadaptabilityand providing theoretical significancefortheevolution of temperate forest ecosystems and forest management.
Key words： Quercus liaotungensis， Quercus coccinea，Quercus rubra，climate change，photosynthetic system，high temperature adaptability
目前，气候变化已对全球森林生态系统产生深远影响，其导致的极端高温事件频率和强度正不断增加（Bastien-Olveraetal.，2024）。（剩余18293字）
