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当前位置: 首页 > 文章 > 利用液相氧电极技术对鼠尾藻叶光合及呼吸作用的初步研究 水产学报 2012,36 (12) 1842-1853
Position: Home > Articles > Primary investigations on the photosynthesis and respiration of leaves of Sargassum thunbergii using liquid-phase oxygen measurement system Journal of Fisheries of China 2012,36 (12) 1842-1853

利用液相氧电极技术对鼠尾藻叶光合及呼吸作用的初步研究

作  者：
梁洲瑞;王飞久;孙修涛;张立敬;刘福利;汪文俊;丁昌玲;李涛;刘坤
单  位：
中国水产科学研究院黄海水产研究所
关键词：
鼠尾藻;异形叶;温度;盐度;光合作用;呼吸作用
摘  要：
为了揭示鼠尾藻叶的生理生态适应性,利用液相氧电极技术对鼠尾藻叶进行了光合及呼吸作用的初步研究:(1)对鼠尾藻异形叶(阔叶、狭叶、气囊)的最大表观光合速率、饱和光强、光补偿点、初始量子效率、暗呼吸速率、色素含量、比叶面积和显微结构等进行了差异比较,初步探讨了鼠尾藻产生叶形变化的可能原因;(2)研究温度和盐度胁迫对鼠尾藻初生阔叶的表观光合速率(Pn)与暗呼吸速率(Rd)的影响,初步分析了鼠尾藻初生阔叶的抗逆生理,可为基于营养繁殖的鼠尾藻人工栽培提供参考。结果表明:15~24℃是鼠尾藻初生枝条生长的适宜温度范围;5℃或大于30℃的温度胁迫1 h对初生阔叶的Pn有显著影响,低温(10℃以下)或高温(大于30℃)胁迫1 h对Rd也有显著影响,但是恢复培养24 h后,低温胁迫组的Pn和Rd均可基本恢复正常;短期的高盐或低盐胁迫对初生阔叶的Pn均有显著影响,尤其是盐度0和盐度60组,但是处理9 h后恢复培养24 h,盐度0组的Pn可恢复正常,而盐度60组的不能恢复;在整个胁迫过程中,盐度40和盐度50组均表现出较高的Rd,盐度0和盐度60胁迫对Rd均有显著影响(P<0.05),各个盐度处理组在处理9 h后恢复培养24 h,其Rd均可恢复正常。
译  名：
Primary investigations on the photosynthesis and respiration of leaves of Sargassum thunbergii using liquid-phase oxygen measurement system
作  者：
LIANG Zhou-rui1,2,WANG Fei-jiu1*,SUN Xiu-tao1,ZHANG Li-jing1,WANG Wen-jun1,LIU Fu-li1,DING Chang-ling1,LI Tao1,LIU Kun1,2 (1.Key Laboratory of Sustainable Development of Marine Fisheries,Ministry of Agriculture,Yellow Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Qingdao 266071,China;2.College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306,China)
关键词：
Sargassum thunbergii;heteromorphism leaf;temperature;salinity;photosynthesis;respiration
摘  要：
For clarifying the physiological and ecological adaptability of leaves of Sargassum thunbergii,the photosynthesis and respiration were investigated by using liquid-phase oxygen measurement system.The major results included two aspects:(1) The differences of maximal net photosynthetic rate(Pnmax),saturation irradiance(Isat),light compensation point(Ic),initial quantum yield α,dark respiration rate(Rd),pigment content,specific leaf area and microstructure of heteromorphism leaf(broad leaf,narrow leaf,pneumathode) were analyzed to reveal the probable reason about the change of leaf shape of S.thunbergii.(2) Effects of different temperatures and different salinities stress on Pn and Rd of broad leaves of newborn branch of S.thunbergii were researched.The preliminary analysis of the newborn branch about resistance physiology could provide reference for the artificial cultivation of S.thunbergii based on vegetative reproduction.The results are shown as follows: The optimum temperature for growth of newborn branch is 15-24 ℃ under the experimental conditions in this paper.Pn had significant reduction when temperature was 5 ℃ or higher than 30 ℃ and Rd was significantly affected by low temperature(10 ℃ or below) or high temperature(higher than 30 ℃) stress for one hour treatment.However,Pn or Rd of low temperature stress groups could nearly recover to normal level after 24 h under standard culture condition.Short-term high or low salinity tests,especially salinity 0 and salinity 60 stress,had significant influence on Pn of broad leaves.However,Pn of salinity 0 group could recover to normal level after a 24 h recovery period,but Pn could not recover after exposure to salinity 60 for 9 h.During the whole stress process,Rd of salinity 40 and salinity 50 treatments both showed high values.And salinity 0 and salinity 60 stress both had significant influence on Rd.However,Rd could recover to normal level after a 24 h recovery period after exposure to different salinities for 9 h.

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