笔竹(Pseudosasa viridula)开花生物学特性研究
Flowering biological characteristics of Pseudosasa viridula
投稿时间:2019-12-16  修订日期:2020-01-13
DOI:
中文关键词:  笔竹  开花  生物学特性  林相
英文关键词:Pseudosasa viridula  Flowering  Biological characteristics  Forest form
基金项目:国家自然科学基金项目(31460177、31000289)
作者单位E-mail
赵婉琪 江西农业大学 wanqzhao@163.com 
于芬 江西农业大学 yufen930@163.com 
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中文摘要:
      摘 要:目的:以江西农业大学竹类植物种质园内的笔竹(Pseudosasa viridula)为材料,观察研究其开花林相、开花动态、花器官构造、结实情况等开花生物学特性。结果:笔竹为连续开花型竹种,花期为每年1月至5月,盛花期为3月初至4月中旬,开花类型复杂多样;自然条件下结实率极低,仅为0.12%,花后竹林更新主要通过无性繁殖。花序由3-4枚小穗组成,每枚小穗上具小花8-10朵,小花含1枚外稃、1枚内稃、3枚浆片、雄蕊多数为3枚,极少数为6枚、1枚雌蕊,柱头3裂,羽毛状;整个花序的开花顺序为自上而下,各小穗上小花的开花顺序为自下而上,为混合花序;雌雄同熟;果实为颖果。本研究为竹类植物的杂交育种工作提供理论参考依据。
英文摘要:
      Abstract: The biological characteristics of flowering of Pseudosasa viridula including appearance of flowering forest, the type of flowering, the morphology of floret, opening of floret and fruit were studied. The results are as follows: Pseudosasa viridula is a kind of continuous flowering bamboo species, and its flowering period is from January to May of each year, and the period of full bloom is from March 1 to April 15. Its flowering types are complex and diverse. The whole inflorescence consists of 3 or 4 spikelets, with 8 - 10 florets on each spikelet. Each floret contains 1 lemma, 1 palea, 3 lodicules, stamens mostly 3 (very few are 6), and 1 pistil with feather-shaped tripetalae stigma. The flowering order of the whole inflorescence was top-down, while the flowering order of florets on the same spikelet was bottom-up, so the inflorescence of Pseudosasa viridula belongs to the mixed inflorescence. The floret is monochogamy. Under natural conditions, the seed setting rate is very low, only 0.12%,and the fruit is caryopsis. This study provides a theoretical reference for sexual breeding and cross breeding of bamboo, as well as a certain basis for the study of low seed setting rate and cross breeding of Pseudosasa viridula.
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