CAJ | 학술논문

目的了解尖叶杜英Elaeocarpus apiculatus、米老排Mytilaria laosensis和藜蒴Castanopsis fissa的抗臭氧和干旱生理机制，为华南地区筛选抗逆树种提供参考。方法以3种幼苗为研究对象，进行人工臭氧熏气和干旱处理后，测定其叶绿素荧光参数时间动态。结果和结论随着胁迫处理时间的延长最小初始荧光（ F0）先升后降， PSⅡ最大光化学效率（Fv／Fm）保持稳定；臭氧胁迫的PSⅡ实际光量子效率Y（Ⅱ）先降后升，其余处理的保持稳定；尖叶杜英的非光化学淬灭（ NPQ）保持稳定，其余幼苗的先升后降。主成分分析表明，幼苗抗臭氧胁迫和干旱胁迫的能力为：黎朔＞尖叶杜英＞米老排，幼苗抗臭氧和干旱交叉胁迫的能力为：尖叶杜英＞黎朔＞米老排。总体来看，臭氧胁迫和干旱胁迫下，3种幼苗能够启动光保护作用的调节机制，具有一定的抗臭氧或干旱的能力。
목적료해첨협두영Elaeocarpus apiculatus、미로배Mytilaria laosensis화려삭Castanopsis fissa적항취양화간한생리궤제，위화남지구사선항역수충제공삼고。방법이3충유묘위연구대상，진행인공취양훈기화간한처리후，측정기협록소형광삼수시간동태。결과화결론수착협박처리시간적연장최소초시형광（ F0）선승후강， PSⅡ최대광화학효솔（Fv／Fm）보지은정；취양협박적PSⅡ실제광양자효솔Y（Ⅱ）선강후승，기여처리적보지은정；첨협두영적비광화학쉬멸（ NPQ）보지은정，기여유묘적선승후강。주성분분석표명，유묘항취양협박화간한협박적능력위：려삭＞첨협두영＞미로배，유묘항취양화간한교차협박적능력위：첨협두영＞려삭＞미로배。총체래간，취양협박화간한협박하，3충유묘능구계동광보호작용적조절궤제，구유일정적항취양혹간한적능력。
Objective] This study was conducted to demonstrate the fluorescent physiology of ozone resist -ance and drought physiology mechanism in the seedlings of three native tree species and provide reference for screening stress-resistant tree species in South China .[Method] Seedlings of Elaeocarpus apiculatus, Mytilaria laosensis and Castanopsis fissa were treated with ozone fumigation and drought condition , and their chlorophyll fluorescence parameters were determined .[Result and conclusion] The results showed that with increasing treatment time , minimal initial fluorescence ( F0 ) of the three seedling types increased and then decreased , and their PSⅡmaximum photochemical efficiency ( Fv/Fm ) remained stable; active quantum efficiency of PSⅡ[ Y (Ⅱ) ] treated with ozone stress decreased , followed by an increase and other treatments remained stable;non-photochemical quenching ( NPQ) of E.apiculatus seedlings remained sta-ble and other seedling types increased and then decreased .Principal component analyses showed that re-sistance of the three seedling types to ozone stress and drought stress was C.fissa >E.apiculatus >M. laosensis, whereas their resistance to intercross stress of ozone and drought was E.apiculatus >C.fissa >M.laosensis.In general, the three seedling types have a certain ability to resist ozone or drought by start -ing an adjustment mechanism of photoprotection under ozone stress or drought stress .