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ANTIOXIDANT RESPONSES IN SCYTOSIPHON LOMENTARIA (PHAEOPHYCEAE) INHABITING COPPER‐ENRICHED COASTAL ENVIRONMENTS 1
TLDR
It is concluded that S. lomentaria inhabiting the copper‐enriched area buffered oxidative stress by a simultaneous involvement of antioxidant enzymes and water‐soluble antioxidant compounds and that copper enrichment of the area did not result in a locally adapted copper‐tolerant ecotype. Expand
Kinetics of copper accumulation in Lessonia nigrescens (Phaeophyceae) under conditions of environmental oxidative stress.
TLDR
It was found that the high ROS levels generated by copper accumulation within the cells persists after the oxidative burst has ceased, suggesting a limited capacity of the algal tissue to buffer the increases of ROS caused by the environmental copper levels. Expand
TWO‐DIMENSIONAL GEL ELECTROPHORESIS ANALYSIS OF BROWN ALGAL PROTEIN EXTRACTS 1
TLDR
The protocol, which includes an initial step to remove salts from the algal tissues, allowed the use of highly resolving two‐dimensional gel electrophoresis (2‐DE) protein analyses, providing the opportunity to unravel potentially novel physiological processes unique to this group of marine organisms. Expand
Differential responses to copper-induced oxidative stress in the marine macroalgae Lessonia nigrescens and Scytosiphon lomentaria (Phaeophyceae).
TLDR
It is suggested that copper toxicity induced an uncontrolled lipoperoxide accumulation which may lead to cell damage and dysfunction in L. nigrescens, explaining at least partially, the absence of this kelp in a copper-enriched coastal environment. Expand
Proteomic analysis and identification of copper stress-regulated proteins in the marine alga Scytosiphon gracilis (Phaeophyceae).
TLDR
A proteomic analysis combining peptide de novo sequencing and BLAST analysis was used to identify novel proteins involved in copper tolerance in the marine alga Scytosiphon gracilis, finding 19 over-expressed proteins, including a chloroplast peroxiredoxin and a cytosolic phosphomannomutase. Expand
Experimental transplants of the large kelp Lessonia nigrescens (Phaeophyceae) in high-energy wave exposed rocky intertidal habitats of northern Chile : Experimental, restoration and management
TLDR
A simple and inexpensive device for re-planting kelps into the lower intertidal zone of wave-swept rocky habitats, using Lessonia nigrescens Bory as a model organism, confirms the feasibility of using this technique to tackle a variety of highly relevant questions involving ecological, physiological, conservation, restoration and management issues. Expand
Effects of copper on early developmental stages of Lessonia nigrescens Bory (Phaeophyceae).
TLDR
It is suggested that the absence of L. nigrescens from copper-enriched environments results from the high sensitivity of its early life cycle stages, which limits growth and maturation of the gametophytic microscopic phase and, as a consequence, prevents development of the macroscopic sporophytic phase. Expand
Molecular and morphologically distinct Scytosiphon species (Scytosiphonales, Phaeophyceae) display similar antioxidant capacities 1
TLDR
The taxonomic status of an alga with complanate thalli, occurring in central Chile and belonging to the genus Scytosiphon, was elucidated and biochemical analyses of copper‐induced antioxidant responses in S. gracilis and S. lomentaria showed an identical increase in antioxidant enzyme activities, suggesting that copper tolerance might be a constitutive trait in these species of Scytosaurs. Expand
LAMINARIOCOLAX SP. (PHAEOPHYCEAE) ASSOCIATED WITH GALL DEVELOPMENTS IN LESSONIA NIGRESCENS (PHAEOPHYCEAE) 1
TLDR
Results showed that galls affecting natural populations of L. nigrescens were associated with the infection by a filamentous brown algal endophyte of the genus Laminariocolax, and identification at the species level of the endophytes infecting Lessonia awaits further studies. Expand
First approach of characterization of bioactive compound in Pyropia orbicularis during the daily tidal cycle
The red seaweed Pyropia orbicularis is an economic important species that occurs predominantly in the high intertidal zone along the chilean coast where it experiences extreme conditions under dailyExpand