The Remobilization of Nitrogen Related to Leaf Growth and Senescence in Rice Plants (Oryza sativa L.) :

NDLデジタルコレクション 被引用文献53件
  • Mae,Tadahiko
    Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University
  • Ohira,Koji
    Department of Agricultural Chemistry, Faculty of Agriculture, Tohoku University

この論文をさがす

抄録

Rice plants (Oryzae sativa L.) grown in a nutrient solution were fed with (^<15>NH_4)_2SO_4 during the 5 days of their young panicle formation. At the end of that time in the youngest leaf blade, which had started to emerge during the labelling, absorbed-nitrogen accounted for 37% of the increased nitrogen of the tissue ; in the next developing leaf blade it accounted for 55%. Thus, remobilized-nitrogen originating from older patrs of the plant made up 63 and 45%, respectively, of their total nitrogen. The important contribution of the remobilized-nitrogen to the development ova leaf is evident. The remobilization of nitrogen in the. 12th leaf blade on the main stem was examined in detail after labelling during its developing stage. The ^<15>N level started to decrease soon after the end of the labelling period and continued to decrease until full senescence, although the total nitrogen in the same leaf increased until just after its complete expansion, suggesting that even a young leaf plays a role as a supplier of remobilized-nitrogen. During the rapid decrease in the total nitrogen after its peak at full expansion of the leaf, the actual proportion of labelled absorbed nitrogen remained nearly the same, indicating that influx of new nitrogen into a senescing leaf is very limited.

収録刊行物

被引用文献 (53)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ