草本竹Mniochloa abersend的开花生物学特性

草本竹的开花现象鲜有报道。为了全面了解竹子的开花特性，以引种至浙江省临安市的原产于巴西的Mniochloa abersend为研究对象，首先对其形态特征和引种适应性进行了分析，之后采用定时定株的方法，对其开花预兆、开花次序、开花周期及持续时间、花序结构以及结实情况等开花生物学特性进行系统的观察与研究。结果表明:M. abersend为多年生丛生草本竹，植株矮小，不适宜在0 ℃以下环境下生长。开花前出现变型小叶，花期较长；花序属于穗形总状花序，为真花序；基本单位是孪生小穗，结实情况良好。M. abersend具有每年开花结实的特性。这将为竹子的杂交育种等研究提供参考。图 2 参22

Floral biology of Mniochloa abersend

There is few research on the flowering phenomena of herbaceous bamboo. To fully understand the characteristics of bamboo flowering, the herbaceous bamboo Mniochloa abersend which was native to Brazil and introduced to Lin'an, Zhejiang was studied. The research examined the morphological characteristics and adaptability of Mniochloa abersend, and observed the selected plants at the stated hours to study their flowering biological characteristics including flowering omens, blooming sequence of florets, flowering period and duration, inflorescence structure as well as seed setting. The results demonstrated that M. abersend was perennial and tufted herbaceous bamboo, which grew not so well under 0 ℃ environment. Deform leaves would appear before flowering. Besides, M. abersend had long florescence, good seed production and spike-shaped raceme, belonging to the genuine inflorescence, whose basic units were twin spikes. In conclusion, M. abersend blossomed and set seeds annually, which could be a reference for crossing breeding and other research on bamboos.[Ch, 2 fig. 22 ref.]