论文
论文标题: Significance of HCO3- alkalinity in calcification and utilization of dissolved inorganic carbon in Chara vulgaris
作者: Wang, Heyun; Ni, Leyi; Yu, Dan
出版刊物: AQUATIC BIOLOGY
出版日期:
出版年份: 2017
卷/期:
DOI: 10.3354/ab00684
论文摘要: To investigate the influence of HCO3- alkalinity on calcification in thalli of the genus Chara, we studied the effects of increased light level and additional HCO3- on calcification rate in C. vulgaris at various hours (30 min, 8 h, 12 h, 12.5 h, 20 h and 24 h after treatment) in a 24 h experiment (12 h light: 12 h dark). We identified a significant Pearson's correlation between exogenous dissolved inorganic carbon (DIC) concentrations and the utilization of DIC (mu mol C g(-1) fresh weight). Plotting the daily rhythm of DIC utilization produced negative quadratic curves. Furthermore, calcification rate (mu mol Ca h(-1) g(-1)) was linearly related to DIC utilization rate (DICuptake; mu mol C h(-1) g(-1)), indicating that the calcification rate is dependent on DICuptake. However, ratios of calcification to the utilization of DIC were decreased at high light intensity and increased with HCO3- addition, which was mainly ascribed to changes in the ratio of calcification to photosynthesis. Chlorophyll fluorescence results provided direct evidence for the promotion of photosynthesis in Chara thalli by both high light and DIC addition and their positive influence on maximum relative electron transport rate. These results suggest that calcification in calcareous C. vulgaris is mainly restrained by HCO3- alkalinity, which could explain the correlation between calcification of Chara thalli and alkalinity of water bodies in the field.
== 实验室与学会 ==
  • == 实验室与学会 ==
  • 淡水生态与生物技术国家重点实验室
  • 中国科学院藻类生物学重点实验室
  • 农业部淡水养殖病害防治重点实验室
  • 武汉白暨豚保护基金会
  • 湖北省海洋湖沼学会
  • 中国动物学会原生动物学分会
  • 中国动物学会斑马鱼分会
  • 湖北省暨武汉动物学会
  • 中国水产学会鱼病学专业委员会
  • 中国鱼类学会
== 平台建设 ==
  • == 平台建设 ==
  • “一带一路”海域赤潮数据库
  • 国家水生生物种质资源库
  • 国家斑马鱼资源中心
  • 中国科学院淡水藻种库
  • 中国科学院武汉生命科学大型仪器区域中心
  • 湿地生态系统观测研究野外站联盟
  • 中国科学院水生生物研究所分析测试中心
  • 中国科学院超级计算武汉分中心
  • 水生生物博物馆
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