Lemna


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Related to Lemna: Lemna minor, Spirodela
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Lemna

 

(duckweed), a genus of perennial herbs of the family Lemnaceae. The small plants occur on or below the surface of water. They are in the form of green round or elongate leaflike plates, from which a long root departs. The flowers are unisexual and lack a perianth. The inflorescence consists of one pistillate and two staminate flowers, which are arranged in lateral depressions of the “leaf and are surrounded by a membranous spathe. The indehiscent and saclike fruit contains one to seven seeds. Duckweeds flower very seldom. There is, however, intensive reproduction by means of budding of the leaflike structures. The plants often form a solid covering on the surface of standing water.

There are approximately ten species, distributed almost throughout the world in standing and slow-moving freshwaters. In the USSR there are three species: ivy duckweed (L. trisulca), common duckweed (L. minor), and gibbous duckweed (L. gibba). Of the three, the gibbous duckweed is the least common. Duckweeds serve as food for waterfowl and, sometimes, as fodder for swine, ducks, and geese.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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References in periodicals archive ?
Phenol toxicity to the aquatic macrophyte Lemna paucicostata, Aquatic Toxicology 106: 182-188.
Results of the phytoremediation potential study on Lemna minor are given in Table 1.
Nuevo registro de flora para las Lomas de Lachay: Primer reporte de Lemna minuta Kunth (Araceae).
Chi Chang, "Effects of copper and cadmium on heavy metal polluted waterbody restoration by duckweed (Lemna minor)" Plant Physiology and Biochemistry, vol.
As shown in Figures 2-5, both PCA and OPLS-DA methods demonstrated that Spirodela polyrhiza, Landoltia punctata, and Lemna aequinoctialis were clustered together with each other in the score plot.
A report from Jain et al., (48) showed the BCF values for floating species; Azolla pinnata and Lemna minor growing with Pb and Zn gradually decreased with increasing metal concentration in the test solution.
Further PVPP has been used to remove polyphenols from beverages to improve the quality of transgenic Lemna minor extracts expressing mAb [5].
The studies were further performed on four common Romanian wetland plants: Cattail (Typha latifolia), Flowering-rush (Butomus umbellatus), Duckweed (Lemna minor), and Water-pepper (Polygonum hydropiper).
Baker, "Influence of nutrients on the development of gibbosity in fronds of the duckweed Lemna gibba L," Journal of Experimental Botany, vol.