摘要
通过水培试验研究了打顶后烟株喷施2,4-D对烟株根中合成烟碱的关键酶鸟氨酸脱羧酶(ODC)、腐胺N-甲基转移酶(PMT)和N-甲基腐胺氧化酶(MPO)以及碳氮代谢重要转化酶(InV)和硝酸还原酶(NR)的活性及烟叶中烟碱含量和钾含量的影响。结果表明,喷施2,4-D的烟叶与对照相比InV活性降低,NR活性升高,协调了烟叶的碳氮代谢,根系活力降低,抑制烟株根中合成烟碱的3种酶活性,减少烟叶中的烟碱积累,同时提高烟叶中钾含量。2,4-D降碱增钾效果的最适宜浓度分别为20 mg/kg和30 mg/kg。
Solution pot experiments were conducted to study the effects of 2, 4-D on the activities of nitrate reductase （NR）, invertase （InV）, ornithine decarboxylase （ODC）, putrescine N-methyl transferase （PMT）, and N-methyl-putrescine oxidase （MPO）, and on the contents of nicotine and potassium in flue-cured tobacco. The results showed that, by spraying 2, 4-D on tobacco leaves after topping, leaf InV activity decreased, NR activity increased, carbon-nitrogen metabolism was better balanced, root activity decreased, three enzyme activities in nicotine synthesis of tobacco roots were constrained, nicotine accumulation decreased, and potassium content in tobacco leaves increased. The optimum 2,4-D concentrations were 20 mg/kg and 30 mg/kg for decreasing nicotine content and increasing potassium content, respectively.
出处
《中国烟草科学》
CSCD
2007年第5期15-18,共4页
Chinese Tobacco Science
基金
河南省烟草专卖局科技攻关项目(HYJK200202)
关键词
烤烟
2
4-D
烟碱
钾
flue-cured tobacco
2, 4-D
nicotine
potassium
