Translocation of serine from leaves to roots in tobacco plants |
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| Authors: | Daisuke Yoshida Akiko Hirato |
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| Institution: | Hatano Tobacco Experiment Station , Japan Monopoly Corporation , Hatano , Japan |
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| Abstract: | It has been reported that nitrogen in the leaves of tobacco plant was translocated to the stem and root during the ripening period (1). Free amino acids in the leaves would play an important role in the translocation of nitrogen. It was also reported that the amino acids injected into the tobacco leaves were translocated to the roots (2,3). It seems probable that the translocation of amino acids would be characteristic among the individual amino acid. As reported previously, 14C assimilated in the leaves is translocated rapidly to the roots (2). Although it has been well known that the photosynthetic product was translocated mainly in the form of sugar, possibility that a part of photosynthetic products is translocated in the form of amino acid would be expected, because the carbon is incorporated rapidly into some of the amino acids, such as glycine, serine and alanine (4). |
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