文章摘要
海带孢子体光合活性对不同温度和光照的响应
Response of photosynthetic activity on different temperatures and light intensities in Saccharina japonica sporophyte
投稿时间:2019-03-11  修订日期:2019-05-16
DOI:
中文关键词: 海带;叶绿素荧光特性;光合有效辐射  温度
英文关键词: Saccharina japonica  chlorophyll fluorescence characteristics  photosynthetically active radiation  temperature
基金项目:国家自然科学基金
作者单位E-mail
程晓鹏 上海海洋大学 chengxiaopeng595@sina.com 
章守宇 上海海洋大学 syzhang@shou.edu.cn 
林军 上海海洋大学  
汪振华 上海海洋大学  
赵旭 上海海洋大学  
黄琳 宁波市海洋与渔业研究院  
摘要点击次数: 352
全文下载次数: 0
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特征,探索海带孢子体对温度和光环境的生理响应机制。本研究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/Fm和Fv/F0最大,分别为0.71和2.40;在18℃水温条件下,其Fv/Fm和Fv/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 Saccharina japonica sporophyte,set up four water temperature gradient (6 ℃, 10 ℃ and 14 ℃ and 18 ℃) of the Saccharina japonica sporophyte in a laboratory experiment, and determined the chlorophyll fluorescence parameters at night under 9 photochemical light gradients (0, 25, 70, 133, 230, 317, 421, 582, 786 μmol·photons·m-2s-1). Results showed that ① under the condition of 6 ℃, Saccharina japonica sporophyte fluorescence parameters (Fv/Fm)and(Fv/F0)value maximum, 0.71 and 2.40 respectively; When water temperature 18 ℃, its (Fv/Fm)and(Fv/F0)minimum value of 0.65 and 1.85 respectively.② The maximum values of photochemical quenching and non-photochemical quenching of Saccharina 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 Saccharina 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 Saccharina 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.
HTML     下载PDF阅读器
关闭

手机扫一扫看