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铝毒是酸性土壤中农业生产的限制因子,抑制植物根的生长,减低植物的耐旱性,引起营养缺乏和植物其他生理生化方面的改变。大豆是一种富营养植物,特别是蛋白含量很高,并且常被用于改良土壤。笔者对7个大豆基因型(品种),在含有2 mmol/L铝和不含有铝的溶液中培养 2 周,进行随机化完全区组设计实验,以研究不同基因型的大豆幼苗对铝胁迫的生长反应。结果显示,在铝胁迫下培养的幼苗,其上胚轴长度、株高、根长、鲜重、干重以及叶绿素含量等都有所下降,但不同基因型品种的幼苗对于铝胁迫呈现一定的差异反应。7个品种按照相应幼苗根生长的数据分为3组:在铝胁迫下,南农73 935 和大黄豆是供试品种中耐受性最好的基因型 (根生长仅减少15%) ;南农 87C 38 和 Williams是最敏感的(减少 37%~39%);1138 2,洪引1号和科丰1号(减少23%~27%)的反应则介于以上两者之间。
Aluminum toxicity is a limiting factor for agricultural production in acid soils, inhibiting the growth of plant roots, reducing plant drought tolerance, causing nutrient deficiencies and other physiological and biochemical changes in plants. Soy is an eutrophic plant, especially high in protein, and is often used to improve soil. Seven soybean genotypes (cultivars) were cultured in a solution containing 2 mmol / L aluminum and no aluminum for 2 weeks. Randomized complete block design experiments were conducted to investigate the effect of different genotypes of soybean seedlings on aluminum stress Growth response. The results showed that seedlings grown under aluminum stress had lower hypocotyls length, plant height, root length, fresh weight, dry weight and chlorophyll content, but the seedling of different genotypes showed certain tolerance to aluminum stress Differential response. Seven cultivars were divided into three groups according to the growth of corresponding seedling roots. Under aluminum stress, Nannong 73 935 and big bean were the most tolerant genotypes in the tested cultivars (root growth decreased by only 15%); Farmers 87C38 and Williams were the most sensitive (37% -39% reduction); 11382, Hongyin 1 and Kefeng 1 (23% -27% decrease) were in the range of above two.