El presente estudio tuvo como objetivo investigar los efectos de metales pesados Níquel (Ni), Zinc (Zn) y Cadmio (Cd) sobre diferentes parámetros morfométricos pigmentos la macrófita acuática Lemna gibba. Ni produjo una disminución del área ejes longitudinal transversal las frondes, a partir 0.37 mg/L 0.92 respectivamente. Zn en estos concentraciones exposición 4.6 mg/L. Cd, por su parte, ejerc...

Currently, mannan-oligosaccharides (MOS) are added to the production costs of Nile tilapia prevent and avoid diseases. An alternative aquatic plants rich in biologically active compounds such as Lemna gibba, a freshwater macrophyte, Ulva lactuca, green seaweed, which have shown productive economic efficiency feed for livestock, poultry, fish, but their effect functional ingredient has not been ...

Circadian rhythms are found in organisms from cyanobacteria to plants and animals. In flowering plants, the circadian clock is involved in the regulation of various physiological phenomena, including growth, leaf movement, stomata opening, and floral transitions. Molecular mechanisms underlying the circadian clock have been identified using Arabidopsis (Arabidopsis thaliana); the functions and ...

G udrun D. Trogisch*, H elm ut Köcher**, and W olfram R. Ullrich* * Institut für Botanik, Technische Hochschule, Schnittspahnstraße 3. D-6100 Darmstadt, Bundesrepublik Deutschland ** Hoechst AG, D-6230 Frankfurt 80. Bundesrepublik Deutschland Z. Naturforsch. 44c, 33 — 38 (1989); received July 13/November 11, 1988 Dedicated to Professor Wilhelm Simonis on the occasion o f his 80th birthday Ammon...

The effect of CN(-) and N(2) on the electrical membrane potential (E(m)) was compared with that of CN(-) on the ATP levels in cotyledons of Gossypium hirsutum and in Lemna gibba L. In mature cotton tissue, CN(-) depolarized E(m) to the energy-independent diffusion potential (E(D)) in the dark. In the light E(m) recovered transiently. The same was observed in leaves of Nicotiana, Avena, Impatien...