摘要
玫瑰的花芽分化开始于混合芽完成营养生长阶段之后。整个分化过程可分为8个时期,各时期的形态分化与芽的外部特征具有一定的相关性。各花部的分化顺序是按花萼、花冠、雄蕊、雌蕊进行的。顶生花芽分化始于2月中旬,5月初分化完成。腋生花芽分化始于3月上旬。玫瑰花穿在开花的当年形成。此外,玫瑰的顶芽和假顶芽通常为混合芽,除形成枝、叶外,还分化出1个顶生花芽和数个腋生花芽,根据其生殖生长锥的形态变化以及花芽的发生方式来看,玫瑰应为聚伞花序,而不是单生或聚生。腋芽的性质则因发生时间、着生位置和营养状况等不同而异。
Flower bud differentiation of Rosa rugosa cv. 'Plena' begins in the formative stage of the mixed bud growth process.The whole process of flower bud differentiation can be divided into eight stages. At every stage, morphodifferentiation of floral primodium correlates with the external character of the bud. Every flower can be subdivided into the calyx, corolla, stamen and pistil. Apical flower bud differentiation commences in the middle of February and finishes in early May. Auxiliary flower bud differentiation starts in early March. Rose flower buds form the same year they blossom. Moreover, terminal bud and pseudo-terminal rose buds are generally mixed buds. In addition to forming shoots and leaves, they can produce an apical flower bud and several auxiliary flower buds. In accordance with the morphological change of the generative cone and the mode of genesis of the flower bud, the rose should be a cyme, but not individual or aggregate.The characteristics of auxiliary buds are,however, different, because of the difference in time, site and nutritional state.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1992年第1期39-45,T002,共8页
Journal of Beijing Forestry University
关键词
玫瑰
花芽分化
Rosa rugosa, flower bud differentiation, mixed bud, cyme
