The flavanone naringenin, an intermediate in flavonoid biosynthesis, was tested for its effect on root growth, phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities, as well as phenolic compounds and lignin contents in soybean (Glycine max L. Merrill) seedlings. Three-day-old seedlings were cultivated in half-strength Hoagland nutrient solution (pH 6.0), with or without 0.1 to 0.4 m...

Single clover plants were grown in the vegetative state, at 20 +/- 1 degrees , 85 +/- 5% relative humidity, 320 +/- 10 ppm CO(2), 12-hour day, with Hoagland nutrient in Perlite, and 100 w . m(-2) of photosynthetically active radiation (0.4-0.7 mu) from mercury-fluorescent lamps. Each plant was confined within a circle 18 cm in diameter by means of a wire framework. The CO(2) exchange rate of th...

This study evaluated the tolerance of mango cultivars ‘Haden’, ‘Palmer’, ‘Tommy Atkins’ and ‘Uba’ grafted on rootstock ‘Imbú’ to salt stress using chlorophyll fluorescence. Plants were grown in modified Hoagland solution containing 0, 15, 30, and 45 mmol L-1 NaCl. At 97 days the parameters of the chlorophyll fluorescence (F0, Fm, Fv, F0/Fm, Fv/Fm, Fv’/Fm’, ΦPSII = [(Fm’-Fs)/(Fm’)], D = (1Fv’/Fm...

To investigate the effects of domestic sewage on photosynthesis and chromium migration plants in chromium-contaminated constructed wetlands, small vertical flow wetlands Coix lacryma-jobi L. were set up. These used to treat wastewater containing 0, 20, 40 mg/L hexavalent (Cr (VI)), prepared with (DS), 1/2 Hoagland nutrient solution (NS), (DN), respectively. The aim was indicators, such as plant...

Hydroponic leafy green production offers high productivity and quality of crops but requires good management pH electrical conductivity (EC) to optimize the nutrient uptake. Nutrient solution is typically managed between 5.5 6.5, whereas lowering more acidic range (e.g., <5.0) can potentially mitigate problematic waterborne diseases. Plant response low species specific generally involves dir...