<正>刚竹属竹种开花枯败后,能通过有性或无性途径自然更新。花后产生大量能育种子的竹种依靠实生苗更新,花后种子基本不育者依靠更新鞭更新。刚竹属竹种的鞭生长型式属单轴型,但在实生苗阶段呈合轴型生长。现有的单轴型竹种不是从现有的合轴型竹种进化而来,二者可能有共同的二倍体祖先。外源赤霉素能影响某些竹种的有性更新过程。

Flowering bamboo groves can be renewed by sexual or asexual rejuvenation. In genus Phyllostachys, some species with a lof of fertile seeds after flowering are rejuvenated via sexual way, i.e. renewed by seedling; the rest are generally rejuvenated by vegetative process, i.e. renewed by rejuvenating rhizomes sprouted from, basal nodes of flowering culms. Because the sympodial growth appears in the seedling stage of monopodial species, the sympodial type seems to be an original characteristic. However, the chromosome numbers of most monopodial bamboo species are 36 or 48, but that of most sympodial bamboo species are 72. Therefore, monopodial bamboo species do not seem to evolve from the present sympodial bamboo species. Vegetative rejuvenation of some bamboo species can be effected by exogenous GA3.