to determine the effective bio-control agents of water fern, azolla filiculoides, adults and nymphs of water lily aphid, rhopalosiphum nymphaeae (l.), were collected on a. filiculoides in guilan province, iran, during october 2013. this aphid has been collected extensively from almost all water fern samples during 2013 and 2014. although r. nymphaeae was reported from numerous host plants in ir...

Treatment with ethylene accelerated the abscission of branches of Azolla filiculoides plants. An Azolla plantlet treated with ethylene at 10 microl liter(-1) divided into 4-5 fragments after a lag period of 6-8 h. Ethylene-induced abscission was effectively inhibited by cycloheximide and was associated with an increase in the activities of cellulase and polygalacturonase. At the fracture surfac...

A new PVC membrane mercury(II) ion electrode based on N,N-dimethylformamide-salicylacylhydrazone (DMFAS) as an ionophore is described, which shows excellent potentiometric response characteristics and displays a linear log[Hg(2+)] versus EMF response over a wide concentration range between 6.2 x 10(-7) and 8.0 x 10(-2) M with a Nerstian slope of 29.6 mV per decade and a detection limit of 5.0 x...

The phytohormones cytokinin and auxin orchestrate the root meristem development in angiosperms by determining embryonic bipolarity. Ferns, having the most basal euphyllophyte root, form neither bipolar embryos nor permanent embryonic primary roots but rather an adventitious root system. This raises the questions of how auxin and cytokinin govern fern root system architecture and whether this ca...

background: one of the most important environmental pollutants is industrial wastewaters. discharging of colorful industrial effluents to receptive waters can lead to eutrification and it has the carcinogenic and mutagenic properties. therefore, the aim of this study is evaluation of acid blue 15 dye removal by dried azolla from aqueous solution. material and methods: the azolla biomass was dri...

Nitrogen Fixation, Symbiotic Cyanobacteria, Photosynthesis, Respiration, Heterotrophic Growth Fructose supported the heterotrophic growth of the cyanobiont Anabaena azollae, isolated from the water fern Azolla filiculoides, and also enhanced its growth in the light by 2-3fo ld . Fructose was taken up at a high rate in the light and in the dark, in an energy-dependent reaction. The photosyntheti...