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Tillering Behavior in Oryza sativa L. : III. The pattern and the relative rate of increase in tiller number
[摘要] The properties of the growth curves of the tiller number per plant in case of the single-planted rice plants in a pot culture were investigated. The tiller number increased with time, and the pattern fitted the logistic curves. On the other hand, when the tiller number was plotted against the plant age expressed by leaf number (the number of spread leaves plus the ratio of the length of the emerged part of the emerging leaf blade on the main stem), the exponential curves fitted to it closely. Therefore, as a time-scale, we used the age expressed by leaf number to calculate the relative rate of increase in tiller number (Rt). In a rice plant, there are differences (D) in growth speed between the main stem and each tiller. In the previous paper, we supposed the "synchronous growth" (the leaf of each tiller and that of the main stem expanded synchronously in a plant) to rid the tillering pattern of the influence of D. The increasing pattern of tillering against the plant age expressed by leaf number in the "synchronous growth" more closely fitted the exponential curve. Therefore, we expressed the all-inclusive Rt of the tillering stage by using the coefficient of the formula of the exponential curves.
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[效力级别]  [学科分类] 农业科学(综合)
[关键词] Exponential curve;茎数増加曲線;Growth analysis;指数曲線;Growth curve;相対分げつ増加率;Logistic curve;同周期生長;Relative rate;分げつ;Synchronous growth;分げつ型;Tiller;分げつ体系;Tillering;ロジスチック曲線 [时效性] 
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