克隆整合对白草克隆生长的影响

Effects of Clonal Integration on Clonal Growth in Pennisetum centrasiaticum

为了研究克隆植物的克隆整合特性和生长特征,对根茎型禾草白草进行了切断根茎的处理,结果表明:破坏克隆整合(切断根茎使分株与基株分离)对白草的克隆生长产生明显影响,切断根茎后白草分株的根茎数量、地上枝数量、根茎总长度、地上枝总长度的增量均明显减少。与基株分离后白草分株的根茎是否具茎尖、分株是否保留地上枝及地上枝的多少、分株根茎的长短都会影响分株的生长表现:切断根茎后无地上枝的分株无法生存,与基株分离后分株保留较多的地上枝、较长的根茎且根茎具茎尖有利于分株自身的生存和生长。

An experiment was conducted with severing rhizome of Pennisetum centrasiaticum to investigate the characteristics of clonal integration and growth of clonal plants. The results showed that the treatment of severing rhizome had obvious impact on clonal growth of Pennisetum centrasiaticum. The number of rhizome, number of remets, total length of rhizome and total length of remets were obviously decreased after severing rhizome. The rhizome with stem tip or no, the number of remets, the length of rhizome all af- fected remet growth after severing rhizome and be separated from its genets. Remets could not survive with no branches after severing rhizome; remets with more branchs, longer rhizomes and with stem tip were beneficial for it＇s survival and growth .