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作 者:任瑛 李广科[1] 桑楠[1] LI Guangke;SANG Nan(College of Environment and Resource,Research Center of Environment and Health,Shanxi University,Taiyuan,030006,China)
机构地区:[1]山西大学环境与资源学院,环境与健康研究中心,太原030006
出 处:《环境化学》2024年第11期3658-3664,共7页Environmental Chemistry
基 金:国家自然科学基金(22076108);山西省科技创新人才团队专项(202204051002024)资助.
摘 要:近年来,多环芳烃衍生物—氧化多环芳烃(OPAHs)因其较高的环境检出和生态风险而备受关注.为明确植物幼苗对OPAHs累积的响应,本研究采用水培实验和植物生理学手段探讨不同浓度OPAHs(1、3、10μmol·L^(−1))胁迫下大麦生长发育、光合作用和氧化损伤及其抗氧化防御能力.结果表明,OPAHs降低大麦种子萌发率、根芽伸长率和根芽干鲜重等指标,增加活性氧、过氧化氢水平以及抗氧化物质含量,但对叶绿素等光合色素无显著影响.相关性分析显示,超氧化物歧化酶、还原型谷胱甘肽和类胡萝卜素参与叶片抑制氧化损伤过程,其中超氧化物歧化酶在1,2-苯并奎宁酮胁迫下的抗氧化防御中起到关键作用.Recently,polycyclic aromatic hydrocarbons derivatives—oxygenated polycyclic aromatic hydrocarbons(OPAHs)are widely noticed due to their high environment detection and ecological risk.To clarify the reponse of OPAHs accumulation in plant seedlings,this study investigated growth,photosynthesis,oxidative damages and antioxidant defense in barley under OPAHs stresses at different concentrations(1,3,10µmol·L^(-1))via hydroponic experiments and plant physiological methods.The results showed that OPAHs inhibited index,such as barley seed germination,root elongation,bud elongation,shoot and root biomass,elevated the levels of ROS and H_(2)O_(2),and induced antioxidant accumulation,but not significantly affecting photosynthetic pigment content such as chlorophylls.The correlation analysis further indicated superoxide dismutase,glutathione and carotenoid were involved in the inhibition of oxidative damages in barley leaves.Among them,superoxide dismutase was essential for antioxidant defense under 1,2-benzan-thraquinone stress.REN Ying,
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