thallus

[thal´us]

1. a simple plant body not differentiated into root, stem, and leaf, characteristic of mycelial fungi and some algae.

2. the actively growing vegetative organism as distinguished from reproductive or resting portions, as in fungi.

thal·lus

(thal'ŭs),

A simple plant or fungus body that is devoid of roots, stems, and leaves. The vegetative growth of a fungus.

[G. thallos, a young shoot]

Farlex Partner Medical Dictionary © Farlex 2012

thallus

(thăl′əs)

n. pl. thalli (thăl′ī) or thal·luses

1. A plant body undifferentiated into stem, root, or leaf.

2. The main body of an alga, fungus, or lichen.

thal·lus

(thal'ŭs)

A simple plant or fungus body that is devoid of roots, stems, and leaves. The vegetative growth of a fungus.

[G. thallos, a young shoot]

Medical Dictionary for the Health Professions and Nursing © Farlex 2012

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References in periodicals archive

Trouble with lichen: the re-evaluation and re-interpretation of thallus form and fruit body types in the molecular era.

Humedad relativa, temperatura, tipo de sustrato y altura de los liquenes del suelo en un paramo tropical

Parmotrema screminiae (Figure 1) has a sorediate, saxicolous thallus and eciliate lobes.

Parmotrema screminiae (Parmeliaceae), a Novel Lichen Species from Brazil with Potent Antimicrobial Activity

The sporophyte is a multicellular thallus typically consisting of internal (i.e.

The occurrence of the green algal leaf endophyte Stomatochroon (Trentepohliales) in Mississippi

They are usually prostrate, with a dorsiventral thallus, 20-50 x 0.80-1.20 mm, without hairs; section of thallus shows the lamina and the border unistratose throughout; border cells have thickened walls, clearly distinct from the rest of the lamina, and single spines, 15-35 [micron]m long; the spines are sparsely distributed along the marginal cells.

Nueva cita y novedades para la flora briofitica Argentina

Taxonomic features used for identification included type of cell connections (fusions and secondary pits), thallus organization, presence/absence and position of mega cells (trichocytes), and characteristics of the reproductive structures (conceptacles) (Appendix Table A1; Appendix Figs.

Effects of ocean acidification on population dynamics and community structure of crustose coralline algae

Even if upper parts of the thallus are under oversaturated light conditions, the productivity of the rest of the algal thallus compensates for this reduced photosynthetic production (Sand-Jensen et al., 2007).

Effect of short-term elevated nutrients and mesoherbivore grazing on photosynthesis of macroalgal communities/Eutrofeerumise ja herbivooride luhiajaline moju makrovetikate koosluste fotosunteesile

Collections and observations were often made at marked locations or along semi-permanent transect lines, which allowed us to note species occurrence, reproductive periodicity, and in some instances, seasonal thallus growth.

The Boulder Patch (North Alaska, Beaufort Sea) and its benthic algal flora

Their equisetum-like body called "thallus" forms neither tissues nor typical organs, such as stems, leaves, roots, or flowers.

Seasonality of water chemistry, carbonate production, and biometric features of two species of Chara in a shallow clear water lake