科研成果
  成果统计  
  获奖
  论文
  专著
  专利
  新品种
  软件著作权
  成果转化  
  成果
  案例
  动态
  · 最新动态
  · 人才招聘
  · 专题
  ·
  · 学会学报
  · 信息服务
  您现在的位置:首页 > 科研成果 > 论文
 
论文编号:
作者:
作者: Jiang, Hong Sheng; Jin, Quan; Li, Pengpeng; Zhao, Suting; Liao, Zuying; Yin, Liyan*; Li, Wei.
作者所在部门:
作者所在部门:
通讯作者:
通讯作者: Yin, Liyan
刊物名称:
刊物名称: AQUATIC BOTANY
论文题目:
论文题目: Different mechanisms of bicarbonate use affect carbon isotope composition in Ottelia guayangensis and Vallisneria denseserrulata in a karst stream
摘要:
摘要:

Macrophytes live in extremely different carbon environments compared to terrestrial plants. In response to bicarbonate dominated inorganic carbon in natural aquatic systems, the ability for HCO3- use has been developed in many macrophytes to alleviate a limitation by CO2 in aquatic systems. In the present study, all present macrophytes in a karst stream were investigated, and we found that seven of nine species were able to use HCO3- and two species at the source of the karst stream were restricted to CO2 use. Two different inhibitors were used to determine the HCO3- use mechanisms in Ottelia guanyangensis and Vallisneria denseserrulata, the only species coexisting from up- to down-stream. External carbonic anhydrase (CAext) mediated HCO3- use was present in O. guanyangensis up-stream, and then O. guanyangensis shifted to a combined mechanism of CAext and anion exchange (AE) mediated HCO3- use down-stream. In these two species, high HCO3- concentration induced the ability to use HCO3-, but high CO2 concentration inhibited this ability. From up-stream to down-stream, the decreasing CO2 induced increasing proportion of HCO3- use that led to changes in the delta C-13 in O. guanyangensis. However, a constant CAext and AE mediated HCO3- use caused a relatively stable delta C-13 in V. denseserrulata from river source to 330 m and then increased the proportion of HCO3- use at the stream outlet associated with the change in delta C-13.

年: 2021
卷: 168
期:
页: 103310
收录类别:
影响因子:
论文出处:
论文出处:
外单位作者单位:
外单位作者单位:
备注:

关闭窗口