Photosynthetic metabolism and major organic compounds in the marine brown alga Desmarestia menziesii from King George Island (Antarctica)

Seasonal changes in the contents of two photosynthates, namely, mannitol and laminaran, were investigated in Ecklonia cava Kjellman with reference to its maturation. The samples were collected from a depth of 8 m in Nishiki Bay, central Japan. The mannitol and laminaran contents in the bladelets were measured. We also determined the content of these photosynthates in the bladelets occupying different positions on the frond and in the sorus and non-sorus portions of the bladelets. The maturation of sori initiated in July and peaked in October. The content of the two photosynthates in the bladelets was low in winter; this coincided with the active formation of new bladelets. Mannitol levels were high during the beginning of the maturation season in summer. Laminaran, in particular, was present in the bladelets only in summer. The laminaran content was higher in the sorus portions than in the non-sorus ones; however, the mannitol content was almost equal in both portions. The laminaran content was high only in the bladelets just prior to maturation and in the mature bladelets at the beginning of the maturation season. These results suggested that mannitol and laminaran were important energy sources for the maturation of E. cava from summer to autumn, and laminaran in particular was closely associated with the maturation of reproductive structures.

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“…1984, 1988; Kremer 1984; Germann 1989; Honya et al . 1993, 1999; Gómez & Wiencke 1998; Gómez et al . 1998).…”

Section: Introductionmentioning

confidence: 99%

“…1998). With regard to Laminaria hyperborea (Gunnerus) Foslie in Helgoland (North Sea) and Ascoseira mirabilis Skottsberg in Potter Cove (King George Island) in the Antarctic, photosynthates have been used as a source of energy for winter growth and/or winter survival (Kremer 1984; Gómez & Wiencke 1998; Gómez et al . 1998).…”

Section: Introductionmentioning

confidence: 99%

Effect of seasonal changes in the photosynthates mannitol and laminaran on maturation of Ecklonia cava (Phaeophyceae, Laminariales) in Nishiki Bay, central Japan

Iwao¹,

Kurashima

Maegawa

2008

Phycological Research

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Life strategy, ecophysiology and ecology of seaweeds in polar waters

Wiencke¹,

Clayton²,

Gómez³

et al. 2006

Life in Extreme Environments

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Polar seaweeds are strongly adapted to the low temperatures of their environment, Antarctic species more strongly than Arctic species due to the longer cold water history of the Antarctic region. By reason of the strong isolation of the Southern Ocean the Antarctic marine flora is characterized by a high degree of endemism, whereas in the Arctic only few endemic species have been found so far. All polar species are strongly shade adapted and their phenology is finely tuned to the strong seasonal changes of the light conditions. The paper summarises the present knowledge of seaweeds from both polar regions with regard to the following topics: the history of seaweed research in polar regions; the environment of seaweeds in polar waters; biodiversity, biogeographical relationships and vertical distribution of Arctic and Antarctic seaweeds; life histories and physiological thallus anatomy; temperature demands and geographical distribution; light demands and depth zonation; the effect of salinity, temperature and desiccation on supraand eulittoral seaweeds; seasonality of reproduction and the physiological characteristics of C. Wiencke (&) AE U. H. Lü der

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Morpho-functionality of Carbon Metabolism in Seaweeds

Gómez

Huovinen

2012

Ecological Studies

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Photosynthetic metabolism and major organic compounds in the marine brown alga Desmarestia menziesii from King George Island (Antarctica)

Cited by 16 publications

References 34 publications

Effect of seasonal changes in the photosynthates mannitol and laminaran on maturation of Ecklonia cava (Phaeophyceae, Laminariales) in Nishiki Bay, central Japan

Effect of seasonal changes in the photosynthates mannitol and laminaran on maturation of Ecklonia cava (Phaeophyceae, Laminariales) in Nishiki Bay, central Japan

Life strategy, ecophysiology and ecology of seaweeds in polar waters

Morpho-functionality of Carbon Metabolism in Seaweeds

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