Journal of Applied Phycology

, Volume 25, Issue 2, pp 537–544

Effects of UV-B radiation on Gelidium floridanum (Rhodophyta, Gelidiales): germination of tetraspores and early sporeling development

Authors

    • Department of BotanyFederal University of Santa Catarina
  • Ticiane Rover
    • Macroalgae Laboratory, Department of Cell BiologyEmbryology and Genetics, Federal University of Santa Catarina
  • Carmen Simioni Zitta
    • Macroalgae Laboratory, Department of Cell BiologyEmbryology and Genetics, Federal University of Santa Catarina
  • Paulo Antunes Horta
    • Department of BotanyFederal University of Santa Catarina
  • Eurico Cabral de Oliveira
    • Department of BotanyFederal University of Santa Catarina
    • Institute of Biosciences, Department of BotanyUniversity of São Paulo
  • Zenilda Laurita Bouzon
    • Department of BotanyFederal University of Santa Catarina
    • Macroalgae Laboratory, Department of Cell BiologyEmbryology and Genetics, Federal University of Santa Catarina
    • Central Laboratory of Electron MicroscopyFederal University of Santa Catarina
Article

DOI: 10.1007/s10811-012-9888-z

Cite this article as:
Scariot, L.Â., Rover, T., Zitta, C.S. et al. J Appl Phycol (2013) 25: 537. doi:10.1007/s10811-012-9888-z

Abstract

The increased incidence of UV-B radiation, particularly in southern South America, has sparked more interest in its effects on marine organisms. Here we describe the effects of UV-B on the early life stages of Gelidium floridanum, an agar-producing species abundant on rocky coasts in southern Brazil. Treated samples were submitted to 0.12 W m−2 of artificial UV-B radiation for 2 h per day over a 15-day period. UV-B exposure induced impairment of tetraspore germination and germling development. We observed a delay in germination, a reduced growth rate of tetrasporelings, and morphological changes, such as a different length-to-width ratio, twisted thallus, loss of pigmentation, and differentiation of more than one apical cell, all leading to a different growth pattern in sporelings that survived treatment. Results indicated a great susceptibility of early-developing Gelidium to UV-B, even at low irradiance and short exposure time.

Keywords

OntogenesisRed algaeSpore germinationSporelingsUV-B radiation damage

Copyright information

© Springer Science+Business Media B.V. 2012