thallophyte


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thal·lo·phyte

(thal'ō-fīt),
A member of the division Thallophyta.

thallophyte

(thăl′ə-fīt′)
n.
Any of a group of organisms, including the algae, fungi, and lichens, that show no differentiation into stem, root, or leaf and were formerly regarded as constituting a subkingdom of the plant kingdom.

thal′lo·phyt′ic (-fĭt′ĭk) adj.

thallophyte

any plant of the group (or former division) Thallophyta, containing the most primative types of plants characterized by the possession of a THALLUS. They vary in size from unicellular types to giant seaweeds up to 75 m in length. The group includes Algae, Bacteria, Fungi, slime fungi (Myxomycetes) and lichens. The Thallophyta clearly have several different evolutionary origins and the term is not used in modern systematics.
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References in periodicals archive ?
While the terminology of the units has still not been fixed, researchers mostly followed the procedures of the Braun-Blanquet approach: studied releves and described floristically delimited units for the thallophyte vegetation using the rank-indicating terminations of the ICPN (-etum, -ion, -alia, -etea).
The extensive number of already described thallophyte syntaxa shows that construction of a meaningful syntaxonomic system for the thallophytic vegetation is feasible (see also WILMANNS, 1998).
In Pringsheim's (1876b) experience, the first neutral generation of thallophytes (i.e., the spore-producing thallus that develops from the fertilized egg) often proceeded directly to spore-production, with greater or lesser suppression of the vegetative parts relative to subsequent neutral generations.
Homologous alternation occurred in most thallophytes and "might be described as a mere differentiation--often a very slight one--of successive gametophytes." In support of his theory, Bower disputed the hitherto generally accepted homology between the zoospores of thallophytes and the spores of archegoniates.
A consideration of the evolutionary and taxonomic significance of some biochemical, micromorphological and physiological characteristics in the Thallophytes. Q.