Hibernacle

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A hibernacle (from Latin hibernare: to winter) is a rarely used expression for a vegetative permanent stage as a wintering organ created by some plants and some aquatic animals .

In the case of plants, the term is only used for aquatic plants and marsh plants, such as sundew and butterflies . These are differently developed buds that arise at the tips of elongated shoots , in leaf axils or at the tips of runners growing in water . These detach from the mother plant when the mother plant dies and sink to the bottom of the water. They contain stored reserve substances that are stored either in the axis tissue or in the bud scales that envelop the bud . Vegetative reproductive organs of a similar structure in land plants, such as brood bulbs, are not usually referred to as hibernacles. Common synonyms for hibernacles in botany are winter buds, turions , brood bodies , gems or bulbils.

Even with immovable usually little or mobile, often colony forming , aquatic animals are vegetative propagation serving zooids sometimes called Hibernakel. They are used here to survive unfavorable living conditions, in addition to winter dormancy, for example also in the event of overheating, drying out of the water or greatly reduced oxygen content, and also for reproduction and distribution. The term is approximately at bryozoans (Bryozoa) Class Gymnolaemata for such resting stages needed. Alternative names include permanent buds and statoblasts (in bryozoa), gemmulae (in freshwater sponges ), podocysts in cnidarians .

Note that the similar-sounding term hibernacle has a different meaning. This denotes winter quarters, for example of hibernating animal species such as bats .

Individual evidence

  1. ↑ Helmut Mühlberg (2010): Growth forms of aquatic angiosperms (Part 1). Bad Endalia 20: 5–20.
  2. ↑ ER Wöss (2005): Biology of freshwater moss animals (Bryozoa). Denisia 16: 21-48.
  3. ^ Matthias Schaefer: Dictionaries of Biology. Ecology. Gustav Fischer Verlag Jena, 3rd edition 1992. ISBN 3 334 60362 8 .

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