摘要
植物生态及生物学研究结果表明,玫瑰在野生状态下,由于受外力作用使种群被压缩在沿海、沿江漫滩沙丘有限狭小的特殊区域内,并且被分割成多个小群落。成熟果实中的种子饱满率只有2%,低温层积处理246 d后发芽率只有8%;由于种子具有先天性品质差及后熟的特性,造成种子更新动力很低,导致大量的异质基因得不到有效保存,拓殖新生态位的能力差,种群处于濒危状态。无性繁殖为主的繁衍方式及外界干扰是造成玫瑰基因资源贫乏及进入濒危状态的关键因素。
Research on plant ecology and biology shows that Rosa rugosa population has been limited in special narrow regions as coast,sand dunes along the river floodplain by the external force,and cut into many small communities.Its seed-filling is only 2% in ripe fruits,and only 8% after 246d by cold stratification.Due to genetic inferior quality and after-ripening characteristics of the seeds, resulted in a low regeneration capacity of seed,a poor effectively preservation of heterogeneous gene in a large number,an...
出处
《吉林林业科技》
2008年第2期1-6,共6页
Journal of Jilin Forestry Science and Technology
关键词
野生玫瑰
濒危机理
Rosa rugosa
endangered mechanism
