Open Access

Effect of temperature and photon fluence rate on gametophytes and young sporophytes of Laminaria ochroleuca Pylaie

  • José Izquierdo1,
  • Isabel M. Pérez-Ruzafa1Email author and
  • Tomás Gallardo1
Helgoland Marine Research200155:87

Received: 2 April 2001

Accepted: 17 September 2001

Published: 1 November 2001


We analysed the effects of temperature and photon fluence rate on meiospore germination, growth and fertility of gametophytes, and growth of young sporophytes of Laminaria ochroleuca. Maximum percentages of germination (91–98%) were obtained at 15°C and 18°C, independent of photon fluence rate. Optimal development of female gametophyte and maximum fecundity and reproductive success of gametophytes occurred at 15°C and 18°C and at 20 and 40 µmol m–2 s–1. Maximum relative growth rate of young sporophytes after 2 weeks of culture was achieved under the same conditions. L. ochroleuca gametophytes cannot reproduce and growth of its sporophytes is not competitive at temperatures close to 10°C.

Laminaria Gametophyte Sporophyte Cultures Seaweed