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Maturation process of top organs in delayed stem maturation soybean plant

Maturation process of top organs in delayed stem maturation soybean plant

Japanese Journal of Crop Science 57(1): 1-7

In order to elucidate the process of the occurrence of delayed stem maturation (DSM) plant, a comparative study on the difference of ripening process between normal matured plant and DSM plant (defined previously by author) were performed by using three varieties of soybean plant, Nagahajiro from Hokkaido, Kari-kei 73 from Tohoku, and Orihimie from Kyushu. There was a great difference between a normal matured soybean plant and a DSM plant. Leaves on the main stem of the DSM plant fell slowly in comparison with those in the normal matured plant. In DSM plants, the upper two or three leaves on their main stem remained stuck to the stem tightly while all the leaves of the normal matured plant fell by harvest. After physiological maturity, the water content in the stem on normal matured plants rapidly decreased, whereas in DSM plants, it remained at a high level. In normal matured plants, the color of the pod-walls changed into brown within several days. In contrast, the period for the color change in DSM plants, lasted for about 2 weeks. These facts indicate that there are harmonious maturation (normal matured) of top organs (leaf, petiole, stem, pod-wall, seed) and inharmonious maturation (DSM) in soybean plant. Therefore, we propose that the former be called conformable maturation (CM) and the later unconformable maturation (UCM).

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Accession: 005859029

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