张玉,许军阁,刘雨昕,周玥瑶,刘欣,贺星,张沛东

• 1:海水养殖教育部重点实验室(中国海洋大学)

摘要(Abstract)：

在人工模拟大气CO_2浓度升高的调节系统条件下,研究了4个不同大气CO_2浓度(380×10~(-6)(对照组,当前大气CO_2浓度)、750×10~(-6)(对应21世纪末大气CO_2浓度)、1 900×10~(-6)(对应23世纪末大气CO_2浓度)、变化组(CO_2浓度由380×10~(-6)逐步升高至1 900×10~(-6)))对鳗草(Zostera marina)存活、生长、光合色素含量、过氧化物酶(POD)活力、可溶性糖含量及叶片和茎节气道面积的影响,分析了鳗草植株应对大气CO_2浓度升高的生长响应和生理适应过程。研究显示,经过30 d培育实验,大气CO_2浓度升高对鳗草植株的存活率(> 98%)、生产力和叶片光合色素含量等指标无明显影响;大气CO_2浓度升高显著提高了植株叶片延伸率和茎节直径,均在1 900×10~(-6)时达到最大值,分别是对照组的1.4和1.1倍;随大气CO_2浓度升高,鳗草植株的叶绿素a/叶绿素b、可溶性糖含量和气道面积等指标均呈现逐渐升高的趋势,在1 900×10~(-6)时达到最大值,显著高于对照组(P<0.05)。研究结果表明,大气CO_2浓度升高对鳗草植株的生长、光合作用、物质代谢和气体交换等生理过程具有促进作用,且CO_2浓度越高促进作用越显著。

关键词(KeyWords)： 鳗草;大气CO_2浓度;存活率;生长;叶片延伸率;可溶性糖;气道面积

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41576112);; 中央高校基本科研业务费专项(201822021);; 山东省重点研发计划项目(2017GSF217002);; 中国海洋大学本科生研究发展计划项目(201710423145X)资助~~

作者(Author): 张玉,许军阁,刘雨昕,周玥瑶,刘欣,贺星,张沛东

DOI: 10.16441/j.cnki.hdxb.20180284

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