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发芽试验是种子检验的一项重要内容,目的是测定种子批最大发芽潜力。发芽床作为发芽试验的介质,其PH值是保证种子能否正常萌发和生长的重要条件之一。国家技术监督局于1995年颁发的《农作物种子检验规程》规定,发芽试验通常用纸和砂作为发芽床,其PH值为6.5～7.5。研究证明种子内大多数酶在PH为6.5～7.5的环境中活性最高,过酸或过碱都会抑制酶的活性,影响种子萌发生长,其作用机理为:一是使酶的空间结构破坏,引起酶活性丧失,二是影响酶活性部位结合基因或催化基因的解离状态,使底物不能与
Germination tests are an important part of seed testing to determine the maximum seed germination potential. Germination bed germination test as a medium, the PH value is to ensure that the seed germination and growth of one of the important conditions. State Bureau of Technical Supervision issued in 1995, “Crop Seed Inspection Regulations” provides that the germination test is usually used as a germination bed of paper and sand, the PH value of 6.5 to 7.5. Studies have shown that most of the enzymes in the seed in the PH of 6.5 to 7.5 the highest activity environment, over or acid will inhibit the enzyme activity, affecting the seed germination and growth, its mechanism of action: First, the spatial structure of the enzyme damage caused The loss of enzyme activity, the second is to affect the site of enzyme activity binding gene or catalytic dissociation state, so that the substrate can not be