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Volume 34 Issue 4
Jul.  2015
Article Contents

Citation:

Effects of pH limitation on population growth,nutrient uptake and photosynthesis physiological processes of Karenia mikimotoi

  • Received Date: 2014-04-18
    Accepted Date: 2014-07-25
  • with the acidification and increased pH caused by the outbreak of red tides in coastal water,the effects of pH on the marine algae physiological and ecological impact have caused human's concern gradually.In this experiment,we use Karenia mikimotoi as research object to study the effects on its physiological state in different pH.The results showed that pH significantly affect the growth,nutrient absorption,chlorophyll concentration,photosynthetic rate and affinity for inorganic carbon of the alga K.mikimotoi.When pH = 6.2,the cell growth was inhibited.Growth rate,nutrient absorption,maximum photosynthetic rate and affinity for inorganic carbon are the lowest; When pH = 8.2,the growth of cells,absorption of nutrients and highest maximum photosynthetic rate are the fastest; pH = 7.2 and 9.2,the algal cells can still maintain higher growth and higher affinity for inorganic carbon is larger than those in pH = 8.2.In short,high or low pH stress can cause adverse changes in the physiological state of the alga K.mikimotoi,especially when the pH is too low.
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  • [1] 陏永年.海水pH及其影响因素[J].山东海洋学院学报,1986(1):146-159.[2]汪思茹,殷克东,蔡卫君,等.海洋酸化生态学研究进展[J].生态学报,2012(18):5859-5869.[6]戴芳芳,周成旭,严小军.pH及光照对两种赤潮甲藻种群生长和胞外碳酸酐酶活性的影响[J].海洋环境科学,2011,30(5):694-698.[10]赵光强,毕 蓉,南春蓉,等.3种赤潮微藻生长过程中pH的变化及其耐受力研究[J].海洋环境科学,2010,29(5):679-682.[11]陈雄文,戴新宾,张荣铣.pH值和氮素对莱氏衣藻(Chlamydomonas reinhardtii)胞外碳酸酐酶活性的影响[J].南京农业大学学报,2000,23(1):27-29.[12]黄凯旋,谢雅慧,吕颂辉.米氏凯伦藻对氮源的吸收利用特征[J].生态环境学报,2009,18(2):453-457.[13]姚炜民,潘晓东,华丹丹.浙江海域米氏凯伦藻赤潮成因的初步研究[J].水利渔业,2007,27(6):57-58.[14]龙 华,杜 琦.福建沿海米氏凯伦藻赤潮的初步研究[J].福建水产,2005(4):22-26.[15]GUILLARD R L.Culture of phytoplankton for feeding marine invertebrates[C]//SMITH W L,CHANLEY M H.Culture of marine invertebrate animals.USA:Springer,1975:26-60.[16]余锦兰,夏建荣,邹永东.小新月菱形藻碳酸酐酶活性和光合作用对高盐度胁迫的响应[J].水产学报,2011,35(4):515-523.[17]李小梅,夏建荣.氮磷营养限制影响三角褐指藻光合无机碳利用和碳酸酐酶活性[J].水生生物学报,2013,37(3):405-412.[18]杨 波,储昭升,金相灿,等.CO2/pH对三种藻生长及光合作用的影响[J].中国环境科学,2007,27(1):54-57.[19]邓 光,李夜光,胡鸿钧,等.温度、光照和pH值对锥状斯氏藻和塔玛亚历山大藻光合作用的影响及光暗周期对其生长速率和生物量的影响[J].植物科学学报,2004,22(2):129-135.[20]张清春.东海大规模甲藻赤潮种吞噬特性及其在赤潮形成中的作用初探[D].青岛:中国科学院研究生院(海洋研究所),2011.[21]张淑雯,欧林坚,吕颂辉,等.光照及营养盐对3种赤潮甲藻吞噬营养行为的影响[J].海洋科学,2011(4):94-99.[27]王 宪,李文权.盐度、pH对海洋藻类光合作用速率的影响[J].海洋环境科学,1991,10(1):37-40.
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Effects of pH limitation on population growth,nutrient uptake and photosynthesis physiological processes of Karenia mikimotoi

  • 1. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China;
  • 2. East China Sea Fisheries Research Institute, Shanghai 200090, China

Abstract: with the acidification and increased pH caused by the outbreak of red tides in coastal water,the effects of pH on the marine algae physiological and ecological impact have caused human's concern gradually.In this experiment,we use Karenia mikimotoi as research object to study the effects on its physiological state in different pH.The results showed that pH significantly affect the growth,nutrient absorption,chlorophyll concentration,photosynthetic rate and affinity for inorganic carbon of the alga K.mikimotoi.When pH = 6.2,the cell growth was inhibited.Growth rate,nutrient absorption,maximum photosynthetic rate and affinity for inorganic carbon are the lowest; When pH = 8.2,the growth of cells,absorption of nutrients and highest maximum photosynthetic rate are the fastest; pH = 7.2 and 9.2,the algal cells can still maintain higher growth and higher affinity for inorganic carbon is larger than those in pH = 8.2.In short,high or low pH stress can cause adverse changes in the physiological state of the alga K.mikimotoi,especially when the pH is too low.

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