Kudoh Hiroshi, Ishiguri Yoshio, Kawano Shoichi
Department of Botany, Faculty of Science, Kyoto University, 606-01, Kyoto, Japan.
Institute of Genetic Ecology, Tohoku University, 980, Sendai, Japan.
Oecologia. 1995 Aug;103(2):148-156. doi: 10.1007/BF00329074.
Variability in the plastic responses of seven life history traits to different chilling and photoperiod regimes was studied in four wild populations of Cardamine flexuosa. This species, a winter-green or year-long annual, showed a facultative long-day and chilling requirement for flowering. Considerable variation among populations was noted in plasticity of all traits. Differences in plasticity were greater among three paddy field populations from different climatic areas than between adjacent populations under different disturbance regimes. A paddy field population (OP) and an adjacent orchard population (OG) exhibited similar plasticity, in both amounts and patterns of response. TP, a Japan Sea coast population, was distinct from three other populations, especially in the small amounts of plasticity. Differences in amount of response were much more common than differences in pattern of response. Character expressions of five traits were significantly correlated with the number of days to flowering. Days to flowering and the numbers of inflorescences and siliques showed high negative correlations because the branching ability of meristems decreased with delay of flowering.
在弯曲碎米荠的四个野生种群中，研究了七个生活史性状对不同低温和光周期处理的可塑性反应的变异性。该物种为冬绿植物或一年生植物，开花需要兼性长日照和低温条件。所有性状的可塑性在种群间存在显著差异。来自不同气候区的三个稻田种群之间的可塑性差异，大于不同干扰条件下相邻种群之间的差异。一个稻田种群（OP）和相邻的果园种群（OG）在反应量和反应模式上表现出相似的可塑性。日本海沿岸种群TP与其他三个种群不同，尤其是可塑性较低。反应量的差异比反应模式的差异更为常见。五个性状的特征表达与开花天数显著相关。开花天数与花序数和角果数呈高度负相关，因为分生组织的分枝能力随开花延迟而降低。
