Isoenzymatic variations in populations of Chenopodium album L. resistant and susceptible to triazines

J. Gasquez, J.P. Compoint
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引用次数: 38

Abstract

As part of a study of triazine resistance in weed species, the authors have collected several resistant populations of Chenopodium album in different areas in France. A study of intra- and inter-population variability between different susceptible and resistant populations has been made using polyacrylamide gel electrophoresis of foliar isoenzymes. The separation of esterases and malate dehydrogenase isoenzymes was carried out in a modified vertical apparatus.

Within each resistant population, all individuals have the same pattern of esterase and populations collected in the same area have the same zymogram. However, populations from different areas have distinct zymograms. These data suggest that the resistant populations originated in the region where they now occur, and that there is a high rate of self-pollination in each resistant population.

After treating a susceptible population with a low dose of atrazine, about 1% of plants survived and these have a high frequency of the esterase zymogram typical of resistant individuals. The offspring of these plants are completely resistant. The resistant and susceptible populations grew near each other so that they may have a common origin. The pattern of occurrence of resistance in relation to its inheritance and the level of inbreeding in populations is discussed.

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三嗪类抗性和敏感性藜麦群体的同工酶变异
作为一项杂草物种对三嗪抗性研究的一部分,作者在法国不同地区收集了几个具有抗性的Chenopodium album种群。利用聚丙烯酰胺凝胶电泳技术对不同易感和抗性群体间的变异进行了研究。在改良的立式装置上进行了酯酶和苹果酸脱氢酶同工酶的分离。在每个耐药群体中,所有个体具有相同的酯酶模式,在同一地区收集的群体具有相同的酶谱。然而,来自不同地区的种群具有不同的酶谱。这些数据表明,抗性种群起源于它们现在出现的地区,并且每个抗性种群的自花授粉率很高。在用低剂量的阿特拉津处理易感群体后,约1%的植物存活下来,这些植物具有抗性个体典型的酯酶酶谱的高频率。这些植物的后代具有完全的抗性。抗性种群和易感种群生长在彼此附近,因此它们可能有一个共同的起源。讨论了抗性的发生模式与其遗传和种群近交水平的关系。
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Publisher's Note Subject index Author index Elsevier's dictionary of weeds of western Europe Energy and economics of intensive animal production
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