4438最大成人|麻豆传媒国产AV手机在线播放|泉州市麻豆文化传媒公司|麻豆传媒md0076沈芯语在线|m麻豆传媒映画微博|yy4080香蕉视频|91制片厂制作厂|国产网红主播精品一区二区|sd肉蒲团|国产成人高清亚洲一区潘金莲,爱豆传媒网站视频资源,兔子先生第一,swag在哪看

    高級(jí)檢索

    2, 4-D對(duì)烤煙煙堿和鉀含量的影響

    Effects of 2, 4-D on Contents of Nicotine and Potassium in Flue-cured Tobacco

    • 摘要: 通過水培試驗(yàn)研究了打頂后煙株噴施2, 4-D對(duì)煙株根中合成煙堿的關(guān)鍵酶鳥氨酸脫羧酶（ODC）、腐胺N-甲基轉(zhuǎn)移酶（PMT）和N-甲基腐胺氧化酶（MPO）以及碳氮代謝重要轉(zhuǎn)化酶（InV）和硝酸還原酶（NR）的活性及煙葉中煙堿含量和鉀含量的影響,。結(jié)果表明,，噴施2, 4-D的煙葉與對(duì)照相比InV活性降低，NR活性升高，協(xié)調(diào)了煙葉的碳氮代謝,，根系活力降低,，抑制煙株根中合成煙堿的3種酶活性，減少煙葉中的煙堿積累,，同時(shí)提高煙葉中鉀含量,。2, 4-D降堿增鉀效果的最適宜濃度分別為20 mg/kg和30 mg/kg。

       

      Abstract: 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.

       

      • HTML全文

    /

    返回文章
    返回