• 作者： 黃啟穎
• 作者服務機構： 國立臺灣大學植物學系
• 中文摘要： 硝酸還原酵素活性於植物根部處理硝酸銨後，在根瘤或是葉片中均有促進之現象，而葉片中此酵素活性比其在根瘤
  中高。植物根瘤的固氮作用可被硝酸銨所抑制，而固氮作用減少趨勢與根瘤中所含的豆科植物血紅素含量減低之現象相
  吻合。根瘤固氮作用與根瘤中硝酸還原作用並沒有競爭利用糖之現象。另外硝酸銨之處理對麩醯胺合成?活性沒有多大
  影響。
  別
• 英文摘要： In addition to the seedling stage, the soybean plants, cv. Shih-Shih, were once again watered with a100 mM ammonium nitrate at the 31st day after seed germination. The nitrate reductase activity wasinduced and significantly increased following the treatment. Ammonium did not inhibit the induction ofnitrate reductase in nodules. Leaves rather than the nodules were the major organ of the plant to utilizeand assimilate the combined nitrogen. The acetylene reduction activity of nitrogenase was sharply inhibit-ed by ammonium nitrate, and this reduction was closely related to the decrease of leghaemoglobin concen-trations in nodules. No significant competitive demand of carbohydrate between the acetylene reductionby nitrogenase and nitrate reduction by nitrate reductase was found in treated plants.
• 中文關鍵字： --
• 英文關鍵字： --