Studies on the characteristics of dry matter production and seed yield of soybean [Glycine max] plant, 3: Dry matter and seed production influenced by the angle of petiole to main stem.
1993
Sagawa S.
Influences of petiole-angle on the dry matter and seed production of soybean were examined. The petiole-angle of whole leaves on the main stem were controlled into 30 degrees (the erect type) and 90 degrees (the horizontal type) to the main stem. These two types were compared with control. In the erect type, the elongation of a main stem and petioles were notable, especially in petioles. Both the dry matter weight and the leaf area were less in the erect type than in the horizontal type and control. Those originated from branches were extremely less than the others. In the horizontal type, the elongation of the main stem and petioles tended to be inhibited, and leaf area tended to be increased. In yield survey, the erect type was inferior to the others in the number of branches, pods and seeds originated from branches. It is presumed that differences in position and distribution of the foliage made differences in the photosynthetic capacity, and in the erect type, the clear inhibition on growth of branches was resulted in the decrease of yield. Even in the horizontal type, the increase of dry matter and yield were slight as compared with control. Therefore, it was little significance that the petiole-angle of leaves on the main stem were controlled to horizontal type.
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