Journal of Applied Phycology

, Volume 25, Issue 2, pp 537–544 | Cite as

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

  • Lidiane Ângela Scariot
  • Ticiane Rover
  • Carmen Simioni Zitta
  • Paulo Antunes Horta
  • Eurico Cabral de Oliveira
  • Zenilda Laurita Bouzon
Article

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

Ontogenesis Red algae Spore germination Sporelings UV-B radiation damage 

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Lidiane Ângela Scariot
    • 1
  • Ticiane Rover
    • 2
  • Carmen Simioni Zitta
    • 2
  • Paulo Antunes Horta
    • 1
  • Eurico Cabral de Oliveira
    • 1
    • 3
  • Zenilda Laurita Bouzon
    • 1
    • 2
    • 4
  1. 1.Department of BotanyFederal University of Santa CatarinaFlorianópolisBrazil
  2. 2.Macroalgae Laboratory, Department of Cell BiologyEmbryology and Genetics, Federal University of Santa CatarinaFlorianópolisBrazil
  3. 3.Institute of Biosciences, Department of BotanyUniversity of São PauloSão PauloBrazil
  4. 4.Central Laboratory of Electron MicroscopyFederal University of Santa CatarinaSanta CatarinaBrazil

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