Flufenacet herbicide treatment phenocopies the fiddlehead mutant in Arabidopsis thaliana

In order to study the mode of action of herbicides we conducted a pilot study analysing phenotype and gene expression of flufenacet- and benfuresate-treated Arabidopsis thaliana (L) Heynhoe plants. Treatments with either herbicide caused phenocopies of the known Arabidopsis mutant fiddlehead, displaying fused organs and the typical fiddlehead-like inflorescence. Herbicide treatments of other plant species, including monocots, also gave rise to analogous organ fusions, indicating the presence of the target in a broad range of plants. Furthermore, many other herbicides with a proposed similar mode of action, eg chloroacetanilides, produced comparable fusion phenotypes in plants. The fiddlehead gene encodes a putative very-long-chain fatty acid elongase (VLCFAE), which corroborates earlier biochemical results pointing to the inhibition of VLCFA synthesis as mode of action of flufenacet. Gene expression profiles of herbicide-treated plants using the first 8247 gene Arabidopsis gene array of Affymetrix provided additional clues in support of inhibition of VLCFA synthesis. We discuss fiddlehead-like elongases as plant specific targets for flufenacet and many other herbicides.     

天然林区蕨菜人工促进恢复试验初报

根据植物演替理论,在太岳林区灵空山天然松杨混交林内,采取割灌＋撒播荞麦人工促进技术,可使蕨菜3年内恢复种群群落,并可加快主要乔木树种高生长。     

信阳地区蕨菜的营养成分分析

信阳地处山区 ,山野菜种类繁多、资源丰富。因其很高的营养价值 ,无污染的优越性 ,受到人们的青睐 ,其开发前景十分广阔。为对山野菜———蕨菜的开发利用提供充分的依据 ,我们对其营养成分进行了分析测定 ,结果表明 :粗水分为 89 1% ,干制品粗蛋白为 2 4 6 2 %、纯蛋白为 4 6 1%、粗纤维含量为 15 1% ,除此还含有钙、磷、铁、胡萝卜、维生素C等其它成分