English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effects of UV-B radiation (UVBR) on photosynthetic activity (Fv/Fm) of aquatic  Synechocystis  sp. and desert  Chroococcus minutus  and effects on composition and fluorescence property of extracellular polymeric substances (EPSs) from  Synechocystis  sp. and  C. minutus  were comparatively investigated. The desert cyanobacterium species  C. minutus  showed higher tolerance of PSII activity (Fv/Fm) to UVBR than the aquatic  Synechocystis  sp., and the inhibited PSII activity of  C. minutus  could be fully recovered while that of  Synechocystis  sp. could be partly recovered. UVBR had significant effect on the yield and biochemical composition of EPS of both species. Protein-like and humic acid-like substances were detected in EPS from  Synechocystis  sp., and protein-like and phenol-like fluorescent compounds were detected in EPS from  C. minutus.  Proteins in EPS of desert and aquatic species were significantly decomposed under UVBR, and the latter was more easily decomposed. The polysaccharides were much more resistant to UVBR than the proteins for both species. Polysaccharides of  Synechocystis  sp. was degraded slightly but those of  C. minutus  was little decomposed. The higher tolerance to UVBR of the desert cyanobacterium can be attributed to the higher resistance of its EPS to photodegradation induced by UVBR in comparison with the aquatic species.

Different Resistance to UV-B Radiation of Extracellular Polymeric Substances of Two Cyanobacteria from Contrasting Habitats