Mulches bring several benefits to lettuce cultivation.A study on the lettuce ‘Red Rapids’ has been conducted to determine the influence of the different colored plastic mulch on its growth. The experiment consisted of five color treatments as follows; treatment 1- metallic silver (control), treatment 2- red, treatment 3- orange, treatment 4- yellow and treatment 5-green. Results showed that the...

Beneficial plant–microbe interaction for enhancing crop yield and quality is a sustainable way to achieve eco-friendly, desirable agricultural productions. The main objective of this experiment was evaluate the individual combined effects an arbuscular mycorrhizal fungus (AMF) strain (Funneliformis mosseae) seaweed extract (SWE) derived from Ascophyllum nodosum, on growth physiological response...

The objectives were to evaluate the effects of increasing metal micronutrient concentrations and silicon (Si) on plant growth susceptibility Pythium root rot with hydroponically grown lettuce (Lactuca sativa). In first experiment, was in hydroponic solutions micronutrients iron (Fe), manganese (Mn), copper (Cu), zinc (Zn) supplied at either 0, 2.5, 5, or 10 mg∙L−1. A standard commercial solutio...

Verocytotoxigenic Escherichia coli (VTEC) can contaminate crop plants, potentially using them as secondary hosts, which can lead to food-borne infection. Currently, little is known about the influence of the specific plant species on the success of bacterial colonization. As such, we compared the ability of the VTEC strain, E. coli O157:H7 'Sakai,' to colonize the roots and leaves of four leafy...

Allelopathic plants are important resources for the discovery of bioherbicides. Rosebay willowherb [Chamaenerion angustifolium (L.) Scop. syn. Epilobium L.] widely distributes in Western Asia, Europe, and North America, behaves as a dominant species within community due to production substances that restrict growth other plants. This study aims at investigating allelopathic potential rosebay by...

The survival and growth of Listeria monocytogenes on fresh lettuce (Lactuca sativa), cucumber (Cucumis sativus) epidermis and parsley (Petroselinum sativum) under different relative humidity (RH) conditions and storage temperatures was studied. Inoculated vegetable pieces were stored at 10C for 7 days, 20C for 5 days, and 30C for 24 h, and at 53 and 90% RH. L. monocytogenes was enumerated perio...

Allelopathy offers potential for weed control through the production and release of allelochemicals from leaves, flowers, seeds, stems and roots.  In this research, allelopathy potentials of ethanolic and aqueous extracts of Vinca rosea L. leaves were evaluated. Three extract concentrations, including 2.5, 5 and 10% (w/v) of both aqueous and ethanolic were prepared from a 10% w/v stock solution...

Leafy vegetables like lettuce (Lactuca sativa L.) naturally have high nitrate content and the European Commission has set maximum level for in lettuce. Glycinebetaine is an organic osmolyte alleviating plant stress, but its role leaf accumulation remains unknown. The uptake of glycinebetaine by roots, potential to regulate improve quality were investigated. Two hydroponic experiments conducted ...

in order to examine of the weed damage on corn and determination of the most suitable index for corn (zea mays l.) yield reduction in field condition and multi-species weed competition, an experiment as an interval mapping was carried out in the researching field of mashhad university during 2008-2009. treatments were complete control (pre-planting treflan and hand weeding), no control (no herb...