Translocation and Distribution of Assimilated Carbon in Peanut Plant
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概要
- 論文の詳細を見る
An attempt was made to monitor ^<13>C that had been photosynthetically assimilated in the foliage of the main stem and branches of peanut plant, as well as in a single leaf at different positions on a branch. When the foliage of the main stem or branch was supplied with ^<13>CO_2 for 8 h at the vegetative stage, ^<13>C assimilated in the branches was detected in the roots and nodules in addition to the foliage immediately after the exposure, whereas when the main stem was supplied with ^<13>CO_2, ^<13>C was not detected in the roots and nodules immediately after ^<13>CO_2 feeding. At the reproductive stage, ^<13>C assimilated in the main stem or branch was found in the leaves, stems, fruit (shell, seed coat, and seed), roots, and nodules immediately after assimilation. Photoassimilates from each leaf of the branch at the reproductive stage were exported to the fruit and leaves that were attached to the same branch. Namely, photoassimilates in the leaves of odd nodes were mainly translocated to the fruits attached to the first node, whereas such photoassimilates from the leaf of even nodes were mainly translocated to the fruit attached to the second node. When the foliage of a branch had been fed ^<13>CO_2 at the vegetative stage, the loss of the assimilated ^<13>C by respiration was about 40% of the total assimilated ^<13>C within 23 d and about 65% within 93 d after the exposure, and a small amount of photoassimilates was detected in the fruit. On the other hand, at the seed-filling stage, about 35% of the photoassimilates were utilized for seed growth within 10 d after the end of exposure. These results suggest that in the peanut plant, the carbon source of nodules mainly depends on the branch, and the main stem plays an important role as carbon source for the fruit, that a sink organ for carbon is connected with a specific sources leaf by the vascular bundles, and that most of the carbon sources for the growth of peanut fruit depend on the photoassimilates at the reproductive stage.
- 一般社団法人日本土壌肥料学会の論文
著者
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INANAGA Shunji
Faculty of Agriculture, Kagoshima University
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Inanaga Shunji
Faculty Of Agriculture Kagoshima University
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Yoshihara Ryuta
Faculty of Agriculture, Kagoshima University
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Yoshihara Ryuta
Faculty Of Agriculture Kagoshima University
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