Large areas of soils have been contaminated by heavy metals, which are deleterious to the existence, reproduction and development of living organisms including plants, animals and microorganisms. The contamination of nature compartments by heavy metals has become a serious environmental problem. Due to the high cost of conventional clean-up technologies, there is an increasing interest in the r...

Introduction Sunflower (Helianthus annus) seeds and byproduct meals are of importance in some parts of the world because they provide a source of high-oil protein material for livestock diets. The major sunflower producing areas of the world today are Argentina, China, Eastern Europe, and the United States. Although Australia produces only relatively small amounts of sunflower meal (Table 1), i...

Direct sequencing of cytochrome oxidase subunit III (coxIII) mRNA with a specific primer confirms RNA editing in sunflower (Helianthus annus) mitochondria. Six instances of mRNA editing could be verified, one of these specific to this species. All the editing events involve C to U transitions in the coxIII mRNA causing codon changes that lead to amino acids better conserved in evolution than th...

abstract in order to determine the critical period of weed control in euro-flour variety of sunflower (helianthus annus, l.) an experimental was conducted with a randomized complete block design with 10 treatments and three replications in islamic azad university astara-branch-agricultural college in 2006 growing season. experimental treatments were conducted in two sets, the first set included...

heavy metals such as cadmium mainly enter in the environment and ecosystem as a result of human activities. this study was conducted in order to evaluate the ability of bacterial inoculants to enhance efficiency of phytoextraction in a calcareous soil. three plants (amaranthus retroflexus, helianthus annus and medicago sativa), along with three levels of inoculants and four levels of cd were ev...