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- W1985394753 abstract "Our understanding of plant responses to enhanced ultraviolet-B (UV-B) radiation has improved over recent decades. However, research on cryptogams is scarce and it remains controversial whether UV-B radiation causes changes in physiology related to photosynthesis. To investigate the effects of supplementary UV-B radiation on photosynthesis and chloroplast ultrastructure in Bryum argenteum Hedw., specimens were cultured for 10 days under four UV-B treatments (2.75, 3.08, 3.25 and 3.41 W m–2), simulating depletion of 0% (control), 6%, 9% and 12% of stratospheric ozone at the latitude of Shapotou, a temperate desert area of northwest China. Analyses showed malondialdehyde content significantly increased, whereas chlorophyll (Chl) fluorescence parameters and Chl contents decreased with increased UV-B intensity. These results corresponded with changes in thylakoid protein complexes and chloroplast ultrastructure. Overall, enhanced UV-B radiation leads to significant decreases in photosynthetic function and serious destruction of the chloroplast ultrastructure of B. argenteum. The degree of negative influences increased with the intensity of UV-B radiation. These results may not only provide a potential mechanism for supplemental UV-B effects on photosynthesis of moss crust, but also establish a theoretical basis for further studies of adaptation and response mechanisms of desert ecosystems under future ozone depletion." @default.
- W1985394753 created "2016-06-24" @default.
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- W1985394753 date "2012-09-20" @default.
- W1985394753 modified "2023-09-26" @default.
- W1985394753 title "Responses of photosynthetic properties and chloroplast ultrastructure of<i>Bryum argenteum</i>from a desert biological soil crust to elevated ultraviolet-B radiation" @default.
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- W1985394753 doi "https://doi.org/10.1111/j.1399-3054.2012.01679.x" @default.
- W1985394753 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22901234" @default.
- W1985394753 hasPublicationYear "2012" @default.
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