Journal of Applied Phycology

, Volume 25, Issue 3, pp 787–794 | Cite as

Effects of irradiance and salinity on the growth of carpospore-derived tetrasporophytes of Gracilaria edulis and Gracilaria tenuistipitata var liui (Rhodophyta)

Article

Abstract

Gracilaria edulis and Gracilaria tenuistipitata var liui are agarophytes with high commercial value which are currently cultivated in countries like India and Thailand. They have great potential for mariculture in Malaysia. Experiments were carried out to study carpospore germination and determine the effects of irradiance and salinity on the growth of these two species. Both species showed the Dumontia type of carpospore development. Both species showed increased daily growth rate (% day−1) with increasing irradiance and tolerance for a wide range of salinity with a preference for low salinity. G. edulis grew best at 100 μmol photons m−2 s−1 and 15 psu while G. tenuistipitata var liui grew best at 60–130 μmol photons m−2 s−1 and 15 psu. The highest growth rate obtained for G. edulis and G. tenuistipitata var liui was 13.57 and 19.7 % day−1 respectively. tenuistipitata var liui. ANOVA showed that both irradiance and salinity have significant effect on the growth of both species (P < 0.05). The results showed that G. tenuistipitata var liui is a good candidate for mass cultivation in Malaysian brackish waters. Besides, this study also showed the feasibility of using spore culture to provide stocks for sustainable farming of Gracilaria.

Keywords

Carpospore culture Gracilaria edulis Gracilaria tenuistipitata var liui Irradiance Salinity Rhodophyta 

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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  • Chew-Hock Yu
    • 1
    • 2
  • Phaik-Eem Lim
    • 1
    • 2
  • Siew-Moi Phang
    • 1
    • 2
  1. 1.Institute of Biological Sciences, Faculty of ScienceUniversity of MalayaKuala LumpurMalaysia
  2. 2.Institute of Ocean and Earth SciencesUniversity of MalayaKuala LumpurMalaysia

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