温度、光照强度和盐度对冬青叶马尾藻生长和光合生理的影响  

Effects of temperature,light intensity,salinity on growth and photosynthetic physiology of Sargassum ilicifolium

作　　者：徐孟杰 李青楠 姚丹丹 邹潇潇 黄惠琴[2,4] 鲍时翔[2,4] 宫春光[1] 朱军[2,4] 穆丹 XU Mengjie;LI Qingnan;YAO Dandan;ZOU Xiaoxiao;HUANG Huiqin;BAO Shixiang;GONG Chunguang;ZHU Jun;MU Dan(Ocean College of Hebei Agriculture University,Qinhuangdao 066003,China;Institute of Tropical Bioscience and Biotechnology,Chinese Academy of Tropical Agricultural Sciences/Hainan Institute for Tropical Agricultural Resources/Key Laboratory of Biology and Genetic Resources of Tropical Crops of Hainan Province,Haikou 571101,China;College of Biology and Agriculture,Jiamusi University,Jiamusi 154007,China;Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources,Chinese Academy of Tropical Agricultural Sciences,Haikou 571101,China)

机构地区：[1]河北农业大学海洋学院,河北秦皇岛066003 [2]中国热带农业科学院热带生物技术研究所/海南热带农业资源研究院/海南省热带农业资源保护与利用重点实验室,海南海口571101 [3]佳木斯大学生物与农业学院,黑龙江佳木斯154007 [4]中国热带农业科学院海南省海洋生物功能性成分研究与利用重点实验室,海南海口571101

出　　处：《南方水产科学》2023年第6期127-133,共7页South China Fisheries Science

基　　金：海南省科技专项(ZDYF2021SHFZ106);海南省自然科学基金高层次人才项目(321RC637);农业农村部财政专项(NFZX2021);中央级公益性科研院所基本科研业务费资金项目(1630052019010)。

摘　　要：冬青叶马尾藻(Sargassum ilicifolium)是海南岛近岸海藻场的重要建群种。利用叶绿素荧光技术,结合藻体光合色素含量和生长率变化,研究了冬青叶马尾藻的生理生态学适应性,为海藻场的保护和恢复提供技术支撑。在不同温度(10、14、18、22、26和30℃)、光照强度(10、20、40、80、120、140和200μmol·m^(−2)·s^(-1))和盐度(16‰、20‰、24‰、28‰、32‰、36‰和40‰)条件下,测定冬青叶马尾藻的特定生长率、叶绿素含量和最大光量子产量(Fv/Fm)等参数。结果显示,冬青叶马尾藻生长的适宜温度为18~26℃,适宜光照强度为20~120μmol·m^(−2)·s^(-1),适宜盐度为16‰~36‰。研究发现,冬青叶马尾藻是喜温的大型海藻,其对低温胁迫更为敏感,过低或过高的光照强度会导致藻体损伤。因此,在对以冬青叶马尾藻为主的海藻场进行保育和恢复的过程中,应充分考虑温度、光照强度对其生长和空间分布的影响。Sargassum ilicifolium is the dominant species in the coastal seaweed field of Hainan Island.To provide technical support for the protection and restoration of seaweed field,we studied the physiological and ecological adaptability of S.ilicifolium by using chlorophyll fluorescence technology in addition with analysis of changes in photosynthetic pigment content and growth rate under different growth conditions.At different temperatures(10,14,18,22,26 and 30℃),light intensities(10,20,40,80,120 and 200μmol·m^(−2)·s^(-1))and salinities(20‰,24‰,28‰,32‰,36‰and 40‰),we measured the specific growth rate,chlorophyll content and maximum fluorescence yield(Fv/Fm)of S.ilicifolium.The results show that the optimal temperature for the growth of S.ilicifolium was 18–26℃;the optimal light intensity was 20–120μmol·m−2·s−1;the optimal salinity was 16‰–36‰.These results indicate that S.ilicifolium is a temperature-loving macroalgae and is more sensitive to low temperature stress.Too low or too high light intensity will lead to algal damage.Therefore,the effects of temperature and light intensity on the growth and spatial distribution should be fully considered in the process of conservation and restoration of the seaweed fields dominated by S.ilicifolium.These results indicate that S.ilicifolium is a temperature-loving macroalgae and is more sensitive to low temperature stress.Too low or too high light intensity will lead to algal damage.Therefore,the effects of temperature and light intensity on the growth and spatial distribution should be fully considered in the process of conservation and restoration of the seaweed fields dominated by S.ilicifolium.

关 键 词：冬青叶马尾藻 温度 光照强度 盐度 光合生理 

分 类 号：S968.4[农业科学—水产养殖]