The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species but also on their different development stages. Even different parts of the same plant sometime...The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species but also on their different development stages. Even different parts of the same plant sometimes have different light demands. Light control is an important procedure at large scale Lamnaria nursery stations in China. Technicians and scientists have different viewpoints on the best method to regulate light. A culture study on Lamnaria japonica starting from zoospores to several centimeter sporophytes to find the optimal and critical irradiance ranges for juvenile Laminaria at different development stages added more knowledge on this aspect. Experiment results show gametophytes can not tolerate irradiance of more than 150uEm-2s-1 while sporophytes can tolerate more than 519 uEm-2s-1. This big difference starts from the very early stage of 1-to 2-celled sporophytes. The biological basis and mechanism of this phenomenon need further research.展开更多
文摘The light demands of seaweeds is an interesting and rather complex phenomenon because they depend not only on the species but also on their different development stages. Even different parts of the same plant sometimes have different light demands. Light control is an important procedure at large scale Lamnaria nursery stations in China. Technicians and scientists have different viewpoints on the best method to regulate light. A culture study on Lamnaria japonica starting from zoospores to several centimeter sporophytes to find the optimal and critical irradiance ranges for juvenile Laminaria at different development stages added more knowledge on this aspect. Experiment results show gametophytes can not tolerate irradiance of more than 150uEm-2s-1 while sporophytes can tolerate more than 519 uEm-2s-1. This big difference starts from the very early stage of 1-to 2-celled sporophytes. The biological basis and mechanism of this phenomenon need further research.
