Cellular Responses of Gelidium floridanum (Gelidiales, Rhodophyta) Tetraspores Under Heat Wave and Copper Pollution

• DOI: 10.1111/jpy.12921
• Publication Date: 2019-09-13T22:13:51Z
• Authors: Marianne Kreusch; Elisa Poltronieri; Fernanda Bouvie; Débora T. Pereira; Deonir Batista; Fernanda Ramlov; Marcelo Maraschin; Zenilda L. Bouzon; Carmen Simioni
• Keywords: Porphyra

Spore settlement and development are bottlenecks for resilience of habitat‐forming macroalgal species. These processes directly related to temperature, a global stressor protagonist ocean warming. The toxic effects local pollutants such as copper may be worsened under warming scenario. Therefore, in this paper, we investigated the increased temperature combined with elevated concentrations on viability, photosynthetic pigments, ultrastructure Gelidium floridanum tetraspores. Tetraspores were cultivated slides sterilized seawater or enriched CuCl 2 , incubated 24°C 30°C 24 h. 3.0 μM had lower viability. Both significant effect phycocyanin phycoerythrin concentrations. Samples presented heavily altered cellular structure, vesicles throughout cytoplasm, chloroplasts structure cells degenerated cytoplasm cell walls. Our findings show that significantly affect G. tetraspores, presenting an additive interaction physiology seaweed's early stages.