Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress

Yi Tao; Xianzhong Mao; Jiangyong Hu; H. O L Mok; Lingyun Wang; D. W T Au; Jia Zhu; Xihui Zhang

doi:10.1016/j.chemosphere.2013.06.031

Author(s)

Yi Tao
Xianzhong Mao
Jiangyong Hu
H. O L Mok
Lingyun Wang
Jia Zhu
Xihui Zhang

Related Research Unit(s)

State Key Laboratory of Marine Pollution (City University of Hong Kong)

Detail(s)

Original language	English
Pages (from-to)	637-644
Journal / Publication	Chemosphere
Volume	93
Issue number	4
Publication status	Published - Oct 2013

Link(s)

DOI	DOI https://doi.org/10.1016/j.chemosphere.2013.06.031 Final Published version
	Check@CityULib
Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-84884354877&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(1bf453bd-f8d1-45c7-8778-9889f7be98cf).html

Abstract

This study aims to investigate the effects of UV-C irradiation on photosynthetic processes of Microcystis aeruginosa to unravel the mechanism(s) involved in how and in what ways UV-C mediates growth suppression and cellular recovery. Changes in the concentration of photosynthetic pigments, photochemical efficiency, PS II core protein (D1) content, and the coding genes expressions were measured. The results indicate that UV-C doses at 20-200mJcm^-2 lead to rapid reduction in gene expression of both psbA (for D1) and cpc (for phycocyanin), but the suppression was short term and recoverable within 3 d of post-UV incubation. Conversely, UV-C doses at ≥50mJcm^-2 could induce marked decline in photochemical efficiency (represented by the optimal PS II quantum yield, F_V/F_M, and the effective PS II quantum yield, Y) as well as decreases in D1 content and water soluble pigments (phycoerythrins, phycocyanins, allophycocyanins) in M. aeruginosa during the post UV-C incubation period. The results suggest that interruption of both the light energy harvesting apparatus (especially the water soluble pigments) and the photochemical process mainly accounted for the growth suppression effect in UV-C irradiated M. aeruginosa. © 2013 Elsevier Ltd.

Research Area(s)

Gene expression, Microcystis aeruginosa, Photoinhibition, Photosystem II, Phycobilisome, UV-C irradiation

Citation Format(s)

[ RIS ] [ BibTeX ]

Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress. / Tao, Yi; Mao, Xianzhong; Hu, Jiangyong et al.
In: Chemosphere, Vol. 93, No. 4, 10.2013, p. 637-644.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Tao, Y, Mao, X, Hu, J, Mok, HOL, Wang, L, Au, DWT, Zhu, J & Zhang, X 2013, 'Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress', Chemosphere, vol. 93, no. 4, pp. 637-644. https://doi.org/10.1016/j.chemosphere.2013.06.031

Tao, Y., Mao, X., Hu, J., Mok, H. O. L., Wang, L., Au, D. W. T., Zhu, J., & Zhang, X. (2013). Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress. Chemosphere, 93(4), 637-644. https://doi.org/10.1016/j.chemosphere.2013.06.031

Tao Y, Mao X, Hu J, Mok HOL, Wang L, Au DWT et al. Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress. Chemosphere. 2013 Oct;93(4):637-644. doi: 10.1016/j.chemosphere.2013.06.031

Tao, Yi ; Mao, Xianzhong ; Hu, Jiangyong et al. / Mechanisms of photosynthetic inactivation on growth suppression of Microcystis aeruginosa under UV-C stress. In: Chemosphere. 2013 ; Vol. 93, No. 4. pp. 637-644.