Impacts of low pH and low salinity induced by acid rain  on the photosynthetic activity of green tidal alga Ulva prolifera

Z.F.  ZHAO; Z.Y.  LIU; S.  QIN; X.H.  WANG; W.L.  SONG; K.  LIU; L.C.  ZHUANG; S.Z.  XIAO; Z.H.  ZHONG

doi:10.32615/ps.2021.036

Photosynthetica (Dec 2021)

Impacts of low pH and low salinity induced by acid rain on the photosynthetic activity of green tidal alga Ulva prolifera

Z.F. ZHAO,
Z.Y. LIU,
S. QIN,
X.H. WANG,
W.L. SONG,
K. LIU,
L.C. ZHUANG,
S.Z. XIAO,
Z.H. ZHONG

Affiliations

Z.F. ZHAO: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
Z.Y. LIU: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
S. QIN: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
X.H. WANG: Center for Ocean Mega-Science, Chinese Academy of Sciences, 266071 Qingdao, Shangdong, China
W.L. SONG: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
K. LIU: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
L.C. ZHUANG: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China
S.Z. XIAO: Changdao Dongyuan Seafood Co. Ltd., 265800 Yantai, Shangdong, China
Z.H. ZHONG: Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 264003 Yantai, Shangdong, China

DOI: https://doi.org/10.32615/ps.2021.036
Journal volume & issue: Vol. 59, no. 4
pp. 468 – 477

Abstract

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Acid rain is a serious environmental problem and has obvious impacts on the growth, reproduction, and photosynthesis of terrestrial plants. Ulva prolifera, a main blooming species of green tides, was studied on its physiological response to acid rain. The photosynthetic parameters were determined under different conditions (salinity: 1, 10, 30‰; pH: 3.0, 3.5, 4.5; duration: 0.5, 1.0, 2.0 h) followed by 24-h recovering under natural conditions. Results showed 1-h treatment with pH 3.5 caused 50-70% reduction in the maximal quantum yield of PSII photochemistry (Fv/Fm) and effective quantum yield of PSII photochemistry (ФPSII) at normal salinity but when the low pH was combined with a salinity of 10‰ or lower, PSII activity was almost completely inhibited. Moreover, the low salinity (1‰ and 10‰) reduced the degree of photoprotection under low pH (3.5) conditions. Finally, we speculated if the pH of acid rain ≤ 3.5, with 1‰ salinity and 2-h rainfall time, the amount of U. prolifera and the scale of green tides would decrease.

Published in Photosynthetica

ISSN: 0300-3604 (Print); 1573-9058 (Online)
Publisher: Academy of Sciences of the Czech Republic, Institute of Experimental Botany
Country of publisher: Czechia
LCC subjects: Science: Botany
Website: https://ps.ueb.cas.cz/

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