Übersetzung für 'prothallium' von Englisch nach Deutsch

prothallium

Prothallium {n}bot.

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fern prothallium

Farnprothallium {n}bot.

• A prothallus, or prothallium, (from Latin "pro" = forwards and Greek "θαλλος" ("thallos") = twig) is usually the gametophyte stage in the life of a fern or other pteridophyte.
• The prothallium developed from the spore is a subterranean mass of tissue of considerable size, and bears both the male and female organs (antheridia and archegonia).
• The fertilization takes place when the eggs and sperm are produced on the different gametophyte, and the results are placed in the tissue of prothallium until the embryo breaks its dormancy and cell division takes place, which finally leads to the development of gametophyte.