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为探究不同素质上部鲜烟叶及根系生理生化特征,研究了正常烟叶、营养过旺烟叶、早衰发白烟叶的烟叶的丙二醛(MDA)、超氧化物歧化酶活性(SOD)、叶绿素酶活性、淀粉酶活性、中微量元素含量、化学成分指标及烟株根系鲜干重和活力差异。结果表明:与正常烟叶相比,早衰发白烟叶根系鲜重、干重、根系活力分别低41.22%、14.44%、60.29%;早衰发白烟叶MDA含量高了34.82%,早衰发白烟叶叶绿素酶、α-淀粉酶、β-淀粉酶活性、SOD活性分别低89.55%、65.71%、71.26%、37.25%。营养过旺烟叶叶绿素酶、α-淀粉酶、β-淀粉酶活性分别低58.76%、36.19%、41.93%。营养过旺和早衰发白烟叶的中微量元素含量相对较低;正常烟叶的淀粉、总糖、还原糖、钾含量要高于营养过旺和早衰发白烟叶。
In order to explore the physiological and biochemical characteristics of upper fresh leaves and roots of different qualities, the effects of malondialdehyde (MDA), superoxide dismutase (SOD) and chlorophyllase activity in tobacco leaves of normal tobacco leaves, over-fluxed tobacco leaves and premature aging white tobacco leaves were studied. , Amylase activity, trace elements, chemical composition and root dry weight and vigor of tobacco plants. The results showed that the root fresh weight, dry weight and root activity of premature senility white tobacco leaves were 41.22%, 14.44% and 60.29% lower than those of normal tobacco leaves respectively. The MDA content of premature senility white tobacco leaves was 34.82% higher. The content of chlorophyllase , Α-amylase, β-amylase activity and SOD activity were 89.55%, 65.71%, 71.26% and 37.25% lower respectively. Overexpression of tobacco leaf chlorophyll, α-amylase, β-amylase activity were low 58.76%, 36.19%, 41.93%. The content of trace elements in overfeeding and premature aging hay leaves was relatively low. The contents of starch, total sugar, reducing sugar and potassium in normal leaf were higher than those in over-nutrition and premature aging.