RESPIRATORY METABOLISM IN THE PHLOEM, XYLEM AND CAMBIUM OF CARROT ROOT
スポンサーリンク
概要
- 論文の詳細を見る
Comparisons of respiratory metabolism among the phloem, cambium and xylem of mature carrot root were carried out and the following results were obtained. 1) The activity of O_2 uptake on a dry weight basis in the cambium was higher than that in the xylem. The phloem showed the lowest activity. 2) RQ was close to unity in ail the three tissues. 3) The Inhibition rate of O_2 uptake by malonate was considerably high in the three tissues. The highest inhibition was observed in the cambium. 4) In the phloem and xylem the malonic inhibition rate of ^<14^gt;CO_2 release from G-U-^<14^gt;C was not so high as compared with that of O_2 uptake. In the cambium, however, those of O_2 uptake and ^<14^gt;CO_2 output were comparable. 5) Malonate treatment did not cause any significant change in RQ. 6) The C_6/C_1 ratio was highest in the cambium and lowest in the phloem. From these it is concluded that the participation of the TCA cycle in respiration is great in all the three tissues of carrot root, and among the three the cambium has the highest activity of the cycle. As for the PP pathway, the xylem and phloem have a higher activity than the cambium.
- 日本植物生理学会の論文
著者
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Komamine Atsushi
Department Of Botany Faculty Of Science The University Of Tokyo:(present)biological Institute Facult
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Shimokoriyama Masami
Department Of Botany Faculty Of Science University Of Tokyo
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MOROHASHI YUKIO
Department of Botany, Faculty of Science, University of Tokyo
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Morohashi Yukio
Department Of Botany Faculty Of Science University Of Tokyo
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Komamine Atsushi
Department of Botany, Faculty of Science, University of Tokyo
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SHIMOKORIYAMA Masami
Department of Biology, Faculty of Science, Toho University
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