Wolffia


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Related to Wolffia: Wolffian duct, Utricularia

Wolffia

 

a genus of plants of the family Lemnaceae; the genus comprises 17 species. In the USSR there is one species, Wolffia arrhira. It consists of a spherical-oval petiole 0.3 to 2.0 mm in cross section; there are no leaves or roots. The plant grows on the surface of stagnant water. Usually it reproduces by budding as frequently as twice a day; more rarely it reproduces by means of seeds. The plant contains starch (up to 65 percent), protein (up to 10 percent), fat (up to 20 percent), and vitamins. It is possible to cultivate the plant for food and fodder purposes.

References in periodicals archive ?
Chareontesprasit y Jiwyam [6], reemplazaron la harina de soya por harina de Wolffia, en dietas que contenian 0; 15; 30 y 45% de sustitucion, obteniendo excelentes resultados en la ganancia de peso en las tilapias del Nilo (Oreochromis niloticus), que fueron alimentadas con un 15% de sustitucion de la harina de pescado por harina de Wolffia.
Similarmente Arrivillaga [3] y Essa (1997), citado por El-Sayed [8], en sus estudios con dietas que contenian Wolffia y Lemna respectivamente, reemplazaron hasta un 50% las dietas comerciales para tilapia con un contenido de 35% de proteina cruda, sin ningun efecto adverso en el crecimiento, ganancia de peso y composicion corporal.
Chareontesprasit y Jiwyam [6], reportan valores de 1,6; 1,8; 1,9; y 2,14 cuando sustituyeron en un 0; 15; 30 y en un 45% respectivamente, la harina de soya, por harina de Wolffia, en alevines de tilapia del Nilo (Orechromis niloticus).
Changes in growth, biochemical components, and antioxidant activity in aquatic plant Wolffia arrhiza (Lemnaceae) exposed to cadmium and lead.
One of Britain's rarest bumblebees, the shrill carder, birds like the lapwing, and plants including frogbit, arrowhead and wolffia - better known as duckweed - could be impacted if work goes ahead.
minima, Azolla filiculoides, Limnobium laevigatum, Pistia stratiotes, Spirodella intermedia, Wolffiella oblonga and Wolffia colombiana) that varies in species composition according to the season of the year and the amount and quality of nutrients (Lahitte and Hurrell, 1996).
tenuissimus 4 7 M H C E Saururus cernuus 4 9 M EH C D Spirodela polyrrhiza 5 7 M H C E Utricularia gibba 4 10 M EH C E Utricularia macrorhiza 5 9 M EH C D Wolffia brasiliensis 6 7 M H C D Wolffia columbiana 5 7 M H C E Zannichellia palustris 6 10 M EH D E Eleocharis palustris 8 10 H EH D E Sparganium emersum 8 10 H EH D D Vallisneria americana 7 7 H H E E Ceratophyllum echinatum 10 10 EH EH E E Myriophyllum verticillatum 10 10 EH EH E E Potamogeton amplifolius 10 10 EH EH Table 2.
The rootless duckweed Wolffia globosa showed substantial
Maxwell 3136 Wolffia brasiliensis Lemnaceae Crawford W.
Colonies of Lemna minor and Wolffia papulifera may develop in quiet backwaters if sufficient sunlight is available.