中山大学学报自然科学版 ›› 2018, Vol. 57 ›› Issue (2): 160-166.

• 论文 • 上一篇    

种植不同植物的生态浮床对浮游藻类的化感作用

雷纯义1, 2,朱术超1,关易云1,李善1,刘蔚秋1   

  1. 1.广东省植物资源重点实验室∥中山大学生命科学学院,广东 广州 510275;
    2. 广东黑石顶省级自然保护区,广东 肇庆 526536
  • 收稿日期:2017-07-21 出版日期:2018-03-25 发布日期:2018-03-25

Allelopathy of ecological foating-bed vegetated with different plants on planktonic algae

LEI Chunyi1,2, ZHU Shuchao1, GUAN Yiyun1, LI Shan1, LIU Weiqiu 1   

  1. 1. Guangdong Key Laboratory of Plant Sciences∥School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China;
    2. Department of Scientific Research and Education, Heishiding Nature Reserve of Guangdong Province, Zhaoqing 526536, China
  • Received:2017-07-21 Online:2018-03-25 Published:2018-03-25

摘要:

以香根草 Vetiveria zizanioides 、黄菖蒲 Iris pseudacorus 、西芹 Apium graveolens 及其不同组合等密度种植构建生态浮床,研究种植不同植物浮床的水体对6种浮游藻类的化感作用,结果表明:香根草大幅抑制藻类的细胞生长及叶绿素 a (Chl.a)含量,而黄菖蒲则对一些藻类的生长及Chl.a含量具有一定的促进作用,西芹对Chl.a含量无显著影响。但是香根草+黄菖蒲+西芹混种浮床对藻类的抑制效率与香根草单种浮床接近,高于种植香根草+黄菖蒲及香根草+西芹的浮床,显示这3种植物共同种植于浮床上产生了某种种间协同作用。香根草浮床和香根草+黄菖蒲+西芹浮床对藻类产生明显的氧化胁迫,导致其膜脂过氧化程度大幅上升,而黄菖蒲和西芹则对MDA含量影响不显著。

关键词: 生态浮床, 富营养化, 化感作用, 浮游植物, 香根草, 黄菖蒲, 西芹

Abstract:

Ecological floating-beds vegetated with  Vetiveria zizanioides ,  Iris pseudacorus  and  Apium graveolens , as well as their combinations were constructed to evaluate their allelopathic effects on 6 phytoplankton species. The results showed that  V. zizanioides  floatingbed significantly inhibited the growth and Chl a  content of tested algae, while  I. pseudacorus  floating bed stimulated the growth and Chl. a  content of some phytoplankton species. Foatingbed vegetated with  V. zizanioides  +  I. pseudacorus  +  A. graveolens  also inhibited the growth and Chl. a  content of the tested algae, and the inhibitory rate was similar to  V. zizanioides  floatingbed   , but higher than that of  V. zizanioides  +  I. pseudacorus  and  V. zizanioides  +  A. graveolens . Study of MDA content in the tested algae showed that floating-beds of  V. zizanioides  and  V. zizanioides  +  I. pseudacorus  +  A. graveolens  caused a significant oxidative stress to the algae, inducing an increase in the lipid peroxidation in the algal cells. On the contrary, floating-beds vegetated with  I. pseudacorus ,  A. graveolens  or  I. pseudacorus  +  A. graveolens  had no effects on MDA content of the algae. Our study indicated that  V. zizanioides  has significant allelopathic effects on phytoplankton, while the allelopathic effects of  A. graveolens  and  I. pseudacorus  are much weaker. Our results also suggested that planting the three species together might caused interspecific synergism, which increased the inhibitory efficiency of the floatingbeds to the phytoplankton. The results are of importance value in the design and plant selection of ecological floating bed.

Key words: ecological floating-bed, eutrophication, allelopathy, phytoplankton; , Vetiveria zizanioides ; , Iris pseudacorus ; , Apium graveolens

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