The results of experiments in which intact plants of Lemna paucicostata were labeled with either l-[(3)H(3)C]methionine, l-[(14)CH(3)]methionine, or [1,2-(14)C]ethanolamine support the conclusion that growth in concentrations of choline of 3.0 micromolar or above brings about marked decreases in the rate of biosynthesis of methylated forms of ethanolamine (normally present chiefly as phosphatid...

IIn June 2021, parasitism by leeches of the genus Helobdella was observed for first time in Hyla eximia during an irrigation canal monitoring. This event occurred shortly after canals were opened to supply agroecosystem The Cerrillo, Piedras Blancas, Toluca de Lerdo, State Mexico, Mexico. frog trapped one beds, which had abundant presence duckweed (Lemna minor). We analyzed load and distributio...

The Lemna genus is a group of monocotyledonous plants with tiny, floating bodies. Lemna gibba G3 and L. paucicostata 6746 were once intensively analyzed for physiological timing systems of photoperiodic flowering and circadian rhythms since they showed obligatory and sensitive photoperiodic responses of a long-day and a short-day plant, respectively. We attempted to approach the divergence of b...

The strategies of metal tolerance developed by several plants that enable them to survive in metal contaminated and polluted sites. Some of them may accumulate significant concentration of a specific element. The work presented here is part of the on going study in Central Portugal, and it focus only in a preliminary description. We have observed that Apium nodiflorum, Callitriche stagnalis, Le...

The aim of the present study was to introduce an alternative way for insects control through biodegradable plants materials. The different cold water extracts dilutions of Acacia modesta and Glycyrrhiza glabra were tested against Tribolium castaneum. The extracts dilutions of both plants caused mortality of the Tribolium castaneum. ANOVA revealed that dilutions and plants were highly significan...

It was shown scientifically substantiated the use of lesser duckweed (Lemna minor L.) as a test object for environmental monitoring purposes when contaminated with copper (II), iron lead and zinc cations. The influence metal cations in concentration range from 0.1 to 10.0 mg/l on specific growth rate dynamics changes total area leaf blades (fronds) freshwater plants has been studied. that Cu2+ ...

Lemna spp. of the family Lemnaceae have been widely studied for their potential application in phytoremediation. A few Lemna species are already being adopted to enhance natural attenuation for both organic and inorganic pollution in polishing ponds of wastewater treatment facilities, and constructed wetland designed for decontamination of metal pollution. In view of this growing interest, we r...