1. Impacts of low pH and low salinity induced by acid rain on the photosynthetic activity of green tidal alga Ulva prolifera.
- Author
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ZHAO, Z. F., LIU, Z. Y., QIN, S., WANG, X. H., SONG, W. L., LIU, K., ZHUANG, L. C., XIAO, S. Z., and ZHONG, Z. H.
- Subjects
ACID rain ,GREEN algae ,SALINITY ,ULVA ,BANGIALES ,CHLOROPHYLL spectra ,EARTH tides - Abstract
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 almoction 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 decreast completely inhibited. Moreover, the low salinity (1‰ and 10‰) reduced the degree of photoprotese. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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