共查询到20条相似文献,搜索用时 46 毫秒
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科宝植物优生素——是用高新生物技术从天然植物原料中提取出特种有机质(基因诱导剂),加上植物必须的微量元素,科学配方、精制而成的新一代多功能叶面肥。它能激活植物体内各种酶的活性,诱导优良基因和抗逆基因的表达,充分发挥植物自身的潜能,增强免役功能和防御机制,抗病抗逆, 相似文献
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葡聚六糖对黄瓜幼苗活性氧代谢的影响 总被引:3,自引:0,他引:3
葡聚六糖是一种新型寡糖类抗病诱导剂,它能激活植物的防卫系统。采用10mg.L-1的葡聚六糖处理黄瓜幼苗后,叶片中H2O2含量明显增加,过氧化物酶(POD)和超氧化物歧化酶(SOD)活性上升,过氧化氢酶(CAT)活性明显下降,而丙二醛(MDA)含量变化不大。这些结果表明,活性氧积累与葡聚六糖诱导的抗病作用密切相关。 相似文献
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植物基因诱导剂是采用作物基因表型物理诱导,提高光合作用效率(净光合强度可提高50—400%),增强生理代谢,激发植物抗冷耐冻、抗旱耐涝、耐热、耐荫、抗倒伏、抗病虫、抗酸雨、耐盐碱等潜能。 相似文献
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春雨1号是世界第一粒胶囊农药,集八剂(细胞赋活剂、膨果生根剂、生长平衡剂、基因活化剂、抗病诱导剂、药肥增效剂、除草安全剂、饲料添加剂)、十效(促根、壮苗、保花、美果、抗病、抗寒、解毒、增效、优质、高产)于1粒的神奇物质。它能迅速渗透到植物体内,最大限度地吸收阳光,提高细胞活力,激发植物潜能。适用于所有植物 相似文献
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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. 相似文献
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Plant speciation 总被引:2,自引:0,他引:2
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. 相似文献
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