1. Plenary Lectures

Hydrobiologia

, Volume 260, Issue 1, pp 1-14

Environmental and internal control of seasonal growth in seaweeds

  • Klaus LüningAffiliated withBiologische Anstalt Helgoland

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Abstract

Elaborate control systems activate and inactivate growth meristems of certain seaweeds so that their seasonal phases of growth and rest are exactly synchronized to the environmental annual course. Recent tank experiments with kelp species demonstrate the existence of endogenous, circannual clocks which are synchronized to the period of the natural year by the annual course of daylength.

Key words

Laminariales growth rhythm circannual seasonal