大百合花序上花大小的变化

Flower Size Variation along the Inflorescences in Cardiocrinum cordatum(Liliaceae)

研究了大百合两个种群花序上3个部位(基部、中部和顶部)花梗直径和花大小(重量)的变化.结果表明:花梗直径在两个种群中均以中部最大,顶部最小.花大小在两个种群中变化趋势不一致,在种群1中,花部位对花大小没有影响.在种群2中,顶部花最大,基部最小.大百合花序上花大小的变化可能是由构建效应决定的.

Variations in flower size （weight） and flower peduncle diameter along the inflorescences were examined in two populations of Cardiocrinum cordatum （Liliaceae）. Flower peduncle diameter was largest at the middle positions and smallest at the distal positions in both populations. No significant difference was observed in the size of flowers at different positions in Population-1 however, distal flowers were the heaviest at the distal positions and lightest at the basal positions in Population-2. Flower size variation within the inflorescence of C. cordatum could be explained by architectural effects.