Effect of light intensity on bound EPS characteristics of two<italic style="font-style: italic">Microcystis</italic>morphospecies: the role of bEPS in the proliferation of<italic style="font-style: italic">Microcystis</italic>

Xianzhe WANG; Xingye HAN; Hongmei GE

doi:10.1007/s00343-022-1362-4

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Effect of light intensity on bound EPS characteristics of twoMicrocystismorphospecies: the role of bEPS in the proliferation ofMicrocystis

Special Section: Cyanobacterial blooms in China: ecology, toxicity, and treatment | Updated：2023-05-19

- Effect of light intensity on bound EPS characteristics of twoMicrocystismorphospecies: the role of bEPS in the proliferation ofMicrocystis
- Journal of Oceanology and Limnology Vol. 40, Issue 5, Pages: 1706-1719(2022)
- Affiliations：
  
  1.School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China
  2.Hubei Key Laboratory of Ecological Restoration for River-Lakes and Algal Utilization, Wuhan 430068, China
- Author bio：
  
  Hongmei GE,gehongmei@hbut.edu.cn
- Funds：
- DOI：10.1007/s00343-022-1362-4
  CLC：
- Received：30 October 2021，
  
  Accepted：04 January 2022，
  
  Online First：28 April 2022，
  
  Published：2022-09
- Accepted：
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Xianzhe WANG, Xingye HAN, Hongmei GE. Effect of light intensity on bound EPS characteristics of twoMicrocystismorphospecies: the role of bEPS in the proliferation ofMicrocystis[J]. Journal of Oceanology and Limnology, 2022, 40(5): 1706-1719.
DOI：

Xianzhe WANG, Xingye HAN, Hongmei GE. Effect of light intensity on bound EPS characteristics of twoMicrocystismorphospecies: the role of bEPS in the proliferation ofMicrocystis[J]. Journal of Oceanology and Limnology, 2022, 40(5): 1706-1719. DOI： 10.1007/s00343-022-1362-4.

摘要

Abstract

Bound extracellular polymeric substances (bEPS) play an important role in the proliferation of

Microcystis

. However

the understanding of bEPS characterization remains limited. In this study

three-dimensional fluorescence excitation-emission matrix (3D-EEM) spectroscopy and zeta potentiometer were used to characterize the loosely bound EPS (LB-EPS) and tightly bound EPS (TB-EPS) from two dominant

Microcystis

morphospecies from Taihu Lake (China) at different light intensities. Physiochemical analysis showed that the growth and TB-EPS or bEPS contents in

Microcystis aeruginosa

were higher than those in

Microcystis flos

aquae

at each light intensity. The 3D-EEM contour demonstrated that the intensities of peak B (tryptophan-like substances) in the TB-EPS from

aeruginosa

were stronger than those from

flos

aquae

when the light intensity was higher than 10 μE/(m

ds). Zeta potential analysis showed that the absolute values of the zeta potential of TB-EPS in the two species both increased with rising light intensity

except those of TB-EPS in

aeruginosa

at 105 μE/(m

ds). Moreover

the absolute values of the zeta potential of

aeruginosa

were higher than those of

flos

aquae

at each light intensity. All these results indicated that

aeruginosa

may more quickly proliferate than

flos

aquae

through increased negative charges

bEPS contents

growth

and tryptophan-like substance contents at certain light intensities.

关键词

Keywords

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Effect of light intensity on bound EPS characteristics of twoMicrocystismorphospecies: the role of bEPS in the proliferation ofMicrocystis

DOI：10.1007/s00343-022-1362-4

摘要

Abstract

关键词

Keywords

references