植物铁蛋白与植物发育

植物铁蛋白是一类铁贮存蛋白,可以贮藏可溶、无毒和生物体可以利用形式的铁.简要介绍了植物铁蛋白在植物发育方面的作用.     

植物系统获得抗病性与抗病诱导剂(综述)

植物抗病诱导剂是近年来发展的一类新型植物杀菌剂,它们本身没有杀菌活性,但能够诱导植物产生系统获得抗病性(SAR),极具应用潜力.本文对近年来抗病诱导剂的研究情况做一简要综述.     

植物病毒与植物激素的相互作用关系

回顾了植物病毒侵染寄主植物后,引起植物体内激素代谢的变化,生长素信号的影响和对赤霉素合成的影响,植物激素和抗病信号转导的关系,以及适宜的外源激素对病毒病的效应。     

Plant speciation

Like the formation of animal species, plant speciation is characterized by the evolution of barriers to genetic exchange between previously interbreeding populations. Prezygotic barriers, which impede mating or fertilization between species, typically contribute more to total reproductive isolation in plants than do postzygotic barriers, in which hybrid offspring are selected against. Adaptive divergence in response to ecological factors such as pollinators and habitat commonly drives the evolution of prezygotic barriers, but the evolutionary forces responsible for the development of intrinsic postzygotic barriers are virtually unknown and frequently result in polymorphism of incompatibility factors within species. Polyploid speciation, in which the entire genome is duplicated, is particularly frequent in plants, perhaps because polyploid plants often exhibit ecological differentiation, local dispersal, high fecundity, perennial life history, and self-fertilization or asexual reproduction. Finally, species richness in plants is correlated with many biological and geohistorical factors, most of which increase ecological opportunities.     

植保工作要适应农业种植业结构调整

当前正在进行的农业种植业结构调整,是以优化品种、提高质量、增加经济效益为中心的战略性调整,也是今后很长一段时间内大通县农业生产发展的首要任务.