文章摘要
程晓鹏,章守宇,林军,汪振华,赵旭,黄琳,王凯.海带孢子体光合活性对不同温度和光照的响应[J].水产学报,2020,44(2):234~244
海带孢子体光合活性对不同温度和光照的响应
Response of photosynthetic activity to different temperature and light intensities in Saccharina japonica sporophyte
投稿时间:2019-03-11  修订日期:2019-05-16
DOI:10.11964/jfc.20190311686
中文关键词: 海带  孢子体  叶绿素荧光特性  光合有效辐射  温度
英文关键词: Saccharina japonica  sporophyte  chlorophyll fluorescence characteristics  photosynthetically active radiation(PAR)  temperature
基金项目:国家自然科学基金(41876191);现代农业产业技术体系专项(CARS-50)
作者单位E-mail
程晓鹏 上海海洋大学海洋生态与环境学院, 上海 201306  
章守宇 上海海洋大学海洋生态与环境学院, 上海 201306  
林军 上海海洋大学海洋生态与环境学院, 上海 201306  
汪振华 上海海洋大学海洋生态与环境学院, 上海 201306  
赵旭 上海海洋大学海洋生态与环境学院, 上海 201306  
黄琳 宁波市海洋与渔业研究院, 浙江 宁波 315000  
王凯 上海海洋大学海洋生态与环境学院, 上海 201306 kwang@shou.edu.cn 
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中文摘要:
      为了从生理生态学角度解答温度和光照对海带孢子体生长过程的影响,探索海带孢子体对温度和光环境的生理响应机制,实验在测定养殖海域海带孢子体生长参数的基础上,设定了6、10、14和18 ℃ 4个水温梯度的海带孢子体暂养实验,以及它们在0、25、70、133、230、317、421、582、786 μmol photons/(m2·s) 9个光合有效辐射(PAR)梯度下的光合活性荧光参数测定。结果显示:①在6 ℃水温条件下,海带孢子体荧光参数Fv /FmFv /F0最大,分别为0.71和2.40;在18 ℃水温条件下,其Fv /FmFv /F0最小,分别为0.65和1.85;②暂养海带孢子体的光化学淬灭(qP)和非光化学淬灭(qN或NPQ)在18 ℃水温条件下达到最大,分别为0.92和3.29;③海带孢子体的快速光曲线随着光合有效辐射(PAR)的增强呈现先上升后下降的趋势;④海域养殖海带孢子体的最大叶长增长速率、叶宽增长速率和干重增重率分别为1.34 cm/d、0.33 cm/d和1.01 g/d。研究表明,海带孢子体干重生长率变化与不同水温条件下的快速光曲线变化一致,高温抑制了海带孢子体光合效率;当环境光合有效辐射大于样品光饱和点(Em)后,海带孢子体相对电子传递速率下降,光合作用受到抑制。
英文摘要:
      In order to explain the influence of temperature and light intensity on the growth process of Saccharina japonica sporophyte and explore the physiological response mechanism of the temperature and light environment from the perspective of physiological ecology. In this study, based on the growth parameters of S. japonica sporophyte,we set up four water temperature gradient (6, 10, 14 and 18℃) of S. japonica sporophyte in a laboratory experiment, and determined the chlorophyll fluorescence parameters at night with 9 photochemical light gradients (0, 25, 70, 133, 230, 317, 421, 582, 786 μmol photons/(m2·s)). Results showed that:① under the condition of 6℃, S. japonica sporophyte fluorescence parameters (Fv/Fm) and (Fv/F0) maximum value was 0.71 and 2.40 respectively; when water temperature 18℃, its (Fv/Fm) and (Fv/F0) minimum value was 0.65 and 1.85 respectively. ② The maximum values of photochemical quenching and non-photochemical quenching of S. japonica sporophyte occur at 18℃ (0.92 and 3.29, respectively). ③ The light response curve of kelp first increased and then decreased with the enhancement of PAR. ④ The maximum leaf length growth rate, leaf width growth rate and dry weight growth rate of S. japonica sporophyte were 1.34 cm/d, 0.33 cm/d and 1.01 g/d, respectively. These results indicated that the change of dry weight growth rate was consistent with the change of light response curve under different water temperature conditions, and high temperature inhibited the photosynthetic efficiency of S. japonica sporophyte. When the ambient photosynthetic effective radiation was larger than the light saturation point (Em), the relative electron transfer rate of kelp decreased and photosynthesis was inhibited.
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