大麦钾高效基因型钾吸收和生理生化特性研究  

Study on K absorption and its physiological and biochemical characteristics of K-efficient barley genotype

作　　者：吴金涛[1] 张锡洲[1] 李廷轩[1] 余海英[1] 

机构地区：[1]四川农业大学资源环境学院,四川雅安625014

出　　处：《植物营养与肥料学报》2010年第4期906-912,共7页Journal of Plant Nutrition and Fertilizers

基　　金：国家自然科学基金(40901138);四川省青年基金(06ZQ026-020);四川省教育厅重点项目(07ZA059);四川省教育厅青年基金(07ZB063)资助

摘　　要：盆栽试验研究了大麦钾高效基因型的吸钾特性和生理生化特性。结果表明,在不同供钾水平下,大麦钾高效基因型（Sandrime）含钾量均小于低效基因型（AC Westech）;但生物量显著大于低效基因型,在苗期和分蘖期,两基因型生物量最大差异分别为2.4和2.1倍。大麦钾高效基因型（Sandrime）根系活力小于钾低效基因型（AC West-ech）,并随供钾水平的提高,其变化趋势不及低效基因型明显。两基因型叶绿素含量在正常供钾水平下达最大值,且高效基因型含量大于低效基因型;钾高效基因型的SOD活性大于低效基因型,基因型差异在苗期最大为2.74倍,分蘖期最大为3.26倍;而POD活性则为高效基因型小于低效基因型,基因型差异在苗期为2.94-4.98倍,分蘖期为2.12-2.76倍,在各供钾水平下均达显著差异水平。高效基因型的MDA和可溶性糖含量小于低效基因型,并随供钾水平的提高逐渐减少。The experiments of soil culture with different potassium（K） levels were carried out to study K absorption and its physiological and biochemical characteristics of K-efficient barley genotype.The results show that K content of the K-efficient barley genotype（Sandrime）is lower than that of the K-inefficient genotype（AC Westech）under the K levels,while biomass of the K-efficient barley genotype is significantly higher than that of the AC Westech（p0.05）.At seedling and tillering stages,the biggest differences in biomass of these two genotypes are 2.4 times and 2.1 times respectively.Root vigor of the K-efficient barley genotype is lower than that of the AC Westech.The chlorophyll contents of the two genotypes reach their maximums when the K is offered normally,and the chlorophyll content of the K-efficient genotype is higher than that of the K-inefficient genotype.SOD activity of the K-efficient genotype is higher than that of the K-inefficient genotype,and the biggest difference is 2.74 times at seedling stage,and 3.26 times at tillering stage.However,POD activity of the K-efficient barley genotype is lower than that of the K-inefficient genotype,and the biggest difference is 2.94-4.98 times at seedling stage and 2.12-2.76 times at tillering stage.MDA and soluble sugar contents of the K-efficient genotype are lower than those of the K-inefficient genotype at the two stages.

关 键 词：大麦 钾 基因型 生理生化 差异 

分 类 号：S512.3[农业科学—作物学]