duckweed - определение. Что такое duckweed
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Что (кто) такое duckweed - определение

GENUS OF PLANTS
Staurogeton; Lenticularia; Lenticula; Hydrophace; Telmatophace; Thelmatophace
  • Lemna in small stream, Usti nad Labem, Czech Republic

duckweed         
  • Duckweeds belong to the order Alismatales and the family Araceae. (a) is a phylogenetic tree based on ribulose-1, 5-bisphosphate carboxylase large-subunit genes. (b) is a schematic ventral view of ''Spirodela'', to show the clonal, vegetative propagation of duckweeds. Daughter fronds (F1) originate from the vegetative node (No), from the mother frond F0 and remain attached to it by the stipule (Sti), which eventually breaks off, thereby releasing a new plant cluster. Daughter fronds may already initiate new fronds (F2) themselves before full maturity. Roots are attached at the prophyllum (P). (c) shows the progressive reduction from a leaf-like body with several veins and unbranched roots to a thallus-like morphology in the Lemnoideae.
SUBFAMILY OF PLANTS
Duckweeds; Duck weed; Lemnaceae; Duckweed; Lemnaoideae; Water lentils
¦ noun a tiny aquatic flowering plant that floats in large quantities on still water. [Lemna and other genera, family Lemnaceae.]
Duckweed         
  • Duckweeds belong to the order Alismatales and the family Araceae. (a) is a phylogenetic tree based on ribulose-1, 5-bisphosphate carboxylase large-subunit genes. (b) is a schematic ventral view of ''Spirodela'', to show the clonal, vegetative propagation of duckweeds. Daughter fronds (F1) originate from the vegetative node (No), from the mother frond F0 and remain attached to it by the stipule (Sti), which eventually breaks off, thereby releasing a new plant cluster. Daughter fronds may already initiate new fronds (F2) themselves before full maturity. Roots are attached at the prophyllum (P). (c) shows the progressive reduction from a leaf-like body with several veins and unbranched roots to a thallus-like morphology in the Lemnoideae.
SUBFAMILY OF PLANTS
Duckweeds; Duck weed; Lemnaceae; Duckweed; Lemnaoideae; Water lentils
·noun A genus (Lemna) of small plants, seen floating in great quantity on the surface of stagnant pools fresh water, and supposed to furnish food for ducks;
- called also duckmeat.
Lenticula         
·noun A lens of small size.
II. Lenticula ·noun A Lenticel.
III. Lenticula ·noun A kind of eruption upon the skin; lentigo; freckle.

Википедия

Lemna

Lemna is a genus of free-floating aquatic plants referred to by the common name "duckweed". They are morphologically divergent members of the arum family Araceae. These rapidly growing plants have found uses as a model system for studies in community ecology, basic plant biology, ecotoxicology, and production of biopharmaceuticals, and as a source of animal feeds for agriculture and aquaculture. Currently, 14 species of Lemna are recognised.

Примеры употребления для duckweed
1. Commercial breeders raise the creatures on wheat and duck pellets, but when the ducks are left to feed themselves they will eat worms, slugs, insects, grass and duckweed.
2. In the spring, blue tits began nesting nine days earlier than usual, while in the summer waterways become clogged with algae and green duckweed, reservoirs dried up and tar melted on the roads as temperatures peaked at 36.5C.
3. The water level in the lake is expected to sink beneath the red line in July, at which point ecological damage such as salinization and duckweed infestation is feared.