王展¹, 孙彬凯¹, 刘雪华^2,3,4,5,6, 郇丽^2,3,4,5, 王广策^2,3,4,5, 秦雨彤¹, 刘家赫¹, 陈雨¹, 奚鹤鸣¹
1.山东省青岛第五十八中学, 山东 青岛 266100;2.中国科学院海洋研究所, 山东 青岛 266071;3.中国科学院实验海洋生物学重点实验室, 山东 青岛 266071;4.中国科学院海洋大科学研究中心, 山东 青岛 266071;5.青岛海洋科学与技术试点国家实验室海洋生物学与生物技术功能实验室, 山东 青岛 266237;6.中国科学院大学, 北京 100049

摘要:
测定了不同辐射强度的中波紫外线（UV-B）对潮间带海藻—孔石莼相对生长率、光合生理活性以及孢子萌发情况的影响。研究表明：UV-B抑制孔石莼的生长，随着辐射强度增加，抑制作用加强，同时UV-B也会抑制孢子萌发，4 kJ/m²的辐射强度即可达到明显的抑制作用。此外，UV-B辐射使孔石莼叶绿素荧光参数（F_v/F_m、Y_Ⅰ、Y_Ⅱ）值降低，随着处理时间延长，孔石莼光合生理活性显著降低。相对于光系统Ⅰ，光系统Ⅱ对于UV-B造成的环境胁迫更为敏感。本研究为UV-B可能影响其它潮间带生物或生态系统的研究提供了理论基础。
关键词:孔石莼中波紫外线孢子萌发光合活性
DOI：10.11759/hykx20180605001
分类号:Q418
基金项目:国家自然科学基金（41676157，41606159，41606161）；现代农业产业技术体系专项资金（CARS-50）

Effects of ultraviolet-B radiation enhancement on the growth and spore germination of Ulva pertusa
WANG Zhan¹, SUN Bin-kai¹, LIU Xue-hua^2,3,4,5,6, HUAN Li^2,3,4,5, WANG Guang-ce^2,3,4,5, QIN Yu-tong¹, LIU Jia-he¹, CHEN Yu¹, XI He-ming¹
1.Qingdao No. 58 High School, Qingdao 266100, China;2.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;3.CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;4.Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao 266071, China;5.Marine Biology and Biotechnology Loboratory, Pilot National Laboratory for Marine Science and Technology(Qingdao), Qingdao 266237, China;6.University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:
In the present study, the relative growth rate, photosynthetic activity, and spore germination of Ulva pertusa were determined under different ultraviolet-B (UV-B) radiation intensities. Results revealed that the growth of U. pertusa was inhibited by UV-B and that the inhibition was strengthened along with increase in UV-B radiation intensity. Spore germination was also influenced, as indicated by the significant inhibition effect of 4 kJ/m² UV-B. In addition, photosynthetic activity (F_v/F_m, Y_Ⅰ, Y_Ⅱ) decreased with prolonged treatment. Compared with photosystem Ⅰ, photosystem Ⅱ was more sensitive to environmental stress caused by UV-B. This study provides a theoretical basis for the possible influences of UV-B on other intertidal organisms or ecosystems.
Key words:Ulva pertusaultraviolet-B(UV-B)spore germinationphotosynthetic activity





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