文章摘要
杨雨玲,李伟,陈伟洲,徐军田.二氧化碳和阳光紫外辐射对坛紫菜丝状体光合生理特性的影响[J].水产学报,2013,37(8):1198~1205
二氧化碳和阳光紫外辐射对坛紫菜丝状体光合生理特性的影响
Effects of CO2 and UV radiation on photosynthetic performance of conchocelis of Porphyra haitanensis
投稿时间:2012-09-15  修订日期:2013-04-21
DOI:DOI:10.3724/SP.J.1231.2013.38337
中文关键词: CO2  紫外辐射  坛紫菜丝状体  生长、光合特性
英文关键词: CO2  UV radiation  conchocelis of Pyropia haitanensis  growth  photosynthetic performance
基金项目:国家自然科学基金
作者单位E-mail
杨雨玲 汕头大学广东省海洋生物技术重点实验室 11ylyang2@stu.edu.cn 
李伟 厦门大学近海海洋环境科学国家重点实验室  
陈伟洲 汕头大学广东省海洋生物技术重点实验室  
徐军田 淮海工学院海洋学院 xjtlsx@126.com 
摘要点击次数: 1755
全文下载次数: 1736
中文摘要:
      为了探索大型海藻生活史丝状体阶段对于海洋酸化与紫外辐射的响应,本文选取经济海藻坛紫菜 (Pyropia haitanensis)的自由丝状体作为实验材料。实验设置两个CO2浓度,正常CO2浓度 (390 ppmv)和高CO2浓度 (1000 ppmv);三种辐射处理,PAR处理 (仅接受可见光)、PA处理 (滤除UV-B)、PAB处理 (全波长辐射)。研究结果表明,高CO2显著提高了坛紫菜自由丝状体的生长速率,但高CO2处理下坛紫菜自由丝状体中藻红蛋白、藻蓝蛋白、叶绿素 a、类胡萝卜素及紫外吸收物质UVACs分别降低了7.3%、9.3%、19.8%、16.5%和18.7%。高CO2处理的坛紫菜自由丝状体最大光化学效率Fv/Fm,光能利用效率 (α)及最大相对电子传递速率 (rETRmax)都显著高于正常CO2处理。太阳模拟器下处理的坛紫菜自由丝状体,PAR与PA处理下的抑制率,正常CO2与高CO2处理间无显著差异,然而在PAB处理下,高CO2处理的抑制率要高于正常CO2处理,这可能与其体内紫外吸收物质含量下降有关。PAR处理下的抑制率,无论是在正常CO2还是在高CO2处理下,都显著低于PA及PAB处理,而PA与PAB之间无显著差异。在未来海洋持续酸化的背景下,UV辐射的增加将会影响到坛紫菜自由丝状体的光合生理及生长。
英文摘要:
      To study the effects of ocean acidification and UV radiation on early life cycle stage of macroalgae, we selected the economic algae conchocelis of Pyropia haitanensis as our material. Two CO2 levels (ambient CO2, 390 ppmv and high CO2, 1000 ppmv) and three irradiances ( PAR (400-700nm), PA (315-400nm) and PAB (280-400nm)) were set in the study. Our results showed that high CO2 significantly enhanced the relative growth rate of conchocelis of Pyropia haitanensis, but the contents of phycoerythrin, phycocyanin, chlorophyll a, carotenoid and UVACs were significantly reduced by 7.3%, 9.3%, 19.8%, 16.5% and 18.7% under high CO2 condition, respectively. Maximum photochemical efficiency (Fv/Fm), light using efficiency (α) and maximum relative electron transport rate (rETRmax)were all significantly increased under high CO2 condition. When exposed to different light treatments, inhibition induced by PAR and PA were no significant differences between the thalli grown at high and ambient CO2. However, significant inhibition under PAB was found in the thalli grown at high CO2, which was closed related to the low concentration of UVACs in the thalli of conchocelis of Pyropia haitanensis. Inhibition induced by PAR were all lower than PA and PAB in both high and ambient CO2 treatments, however, no difference were found between PA and PAB treatments. In future ocean, increased UVR would show great effects on photosynthesis and growth of Pyropia haitanensis, especially under the background of ocean acidification.
HTML   查看全文   下载PDF阅读器
关闭

手机扫一扫看