R. Robles, R. C. Longo, E. G. Noya, A. Vega, and L. J. Gallego Departamento de Fı́sica Teórica, Atómica, Molecular y Nuclear, Universidad de Valladolid, E-47011 Valladolid, Spain Departamento de Fı́sica de la Materia Condensada, Facultad de Fı́sica, Universidad de Santiago de Compostela, E-15782 Santiago de Compostela, Spain ~Received 22 October 2002; revised manuscript received 4 November 2003; p...

Roots of taro (Colocasia esculenta [L.] Schott cvs Bun-long and Lehua maoli) exuded increasing concentrations of oxalate with increasing Al stress. This exudation was a specific response to excess Al and not to P deficiency. Addition of oxalate to Al-containing solutions ameliorated the toxic effect of Al.

Post-transcriptional gene silencing (PTGS) is an important mechanism for regulation of plant gene expression and virus-plant interactions. To better understand this process, the heavy metal cadmium was identified as a specific inhibitor in two different PTGS systems, constitutive and inducible. The pattern of cadmium-induced inhibition of PTGS allowed several insights into PTGS development. Fir...

AtALMT1 (Arabidopsis thaliana ALuminum activated Malate Transporter 1) encodes an Arabidopsis thaliana malate transporter that has a pleiotropic role in Arabidopsis stress tolerance. Malate released through AtALMT1 protects the root tip from Al rhizotoxicity, and recruits beneficial rhizobacteria that induce plant immunity. To examine whether the overexpression of AtALMT1 can improve these trai...

Over the last two years, the Coors Brewing Company has been conducting a pollution prevention and energy conservation project jointly with the DOE, EPA and Colorado Office of Energy Conservation, utilizing the NICE (National Industrial Competitiveness through Energy, Environment, and Economics) program. The goals of the project are to investigate a can printing technology developed at Coors, an...

Environmental stresses are the most important factors that reduce plant growth in stages of development. The presence of aluminum in acidic soils as an environmental stress has an impact on different parts of the plant and reduces root growth, water absorption and nutrients and increases susceptibility to drought.  In order to evaluate the effect of aluminum stress levels on wheat at germinatio...

Aloe plants can be grown autotrophically in a maintenance-free, sterile, ex vitro environment. Excel, 15-5-15 plus minors fertilizer formulation and Plant Preservative Medium (PPM) biocide was used as a very economical basal medium. In vitro micropropagated plantlets were regenerated in Excel media with 2 g /L sucrose and 2.2 μM 6-Benzylamino purine (BA) and used to initiate ex vitro cultures i...

Objective: The aim of the present work was to assess the total phenolic content (TPC), total flavonoid content (TFC), and total alkaloid content (TAC) of crude hydro-methanolic seed extract of Abrus precatorius L. which is one of the beautiful seed bearing plant belonging to family Fabaceae and used extensively in many Ayurvedic preparations with significant therapeutic significance. Methods: T...

In the fishmeal industry, seawater is used to transport fish factories. Due this, “pumping water” with high concentrations of organic matter generated that treated via chemical coagulation before letting it into sea. The objective this study characterize and compare sludge obtained from conventional electrocoagulation process. A pilot plant was built next a plant. both methodologies analyzed fo...

Aluminum (Al), cobalt (Co), sodium (Na), selenium (Se), and silicon (Si) are considered beneficial elements for plants: they are not required by all plants but can promote plant growth and may be essential for particular taxa. These beneficial elements have been reported to enhance resistance to biotic stresses such as pathogens and herbivory, and to abiotic stresses such as drought, salinity, ...