XVI International Botanical Congess
Abstract Number: 6180
Session = When the roots of Phaseolus vulgaris were gravistimulated after partial or perfect decapping, an initial rate of gravireaction gradually declined and the time-gap between gravistimulation and gravireaction enlarged as the size of excised root caps became large. The difference of gravireaction, however, became inconspicuous with time. When the root cap was mostly removed, the roots did not show a clear gravireaction for a while, but perfectly recovered gravitropism after a certain period. At this time, the root cap regenerated imperfectly. When the roots were gravistimulated for 1 h, the cortical microtubules in the 2nd and 3rd layers of cortex along the lower side in the 2-8 mm region of the roots frequently reoriented from transverse to oblique or random.
EFFECTS OF DECAPPING AND MICROTUBULE
ARRAYS ON GRAVITROPISM OF PRIMARY ROOTS OF PHASEOLUS VULGARIS
Y. Kodera and S. Sato, Department of Biology and Earth Sciences, Faculty of Science, Ehime University, Matsuyama, Japan
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