| 摘要: |
| 对太白山独叶草种群的生殖物候、开花结果率、花粉活力、果实特性、种子发芽率、花期和果期的生物量配置等进行了研究，结果表明：（1）独叶草种群为花先叶开放植物，其盛花期、结果盛期、果实成熟盛期分别为05-11,06-30和07-21，花期长达29 d，果期长达59 d，生殖期为108 d；（2）独叶草种群的开花率及结果率分别为13.20%和40.59%，但不同群落间差异较大，金背杜鹃林下独叶草种群的开花率及结果率均较高，分别为25.32%和65.85%，而牛皮桦林下独叶草种群的开花率及结果率仅为6.92%和2.08%；（3）独叶草种群果实的平均长度、宽度和千果重分别为0.667 cm,0.111 cm和1.780 g，果实大小群落间差异不显著，而千果重差异显著；（4）独叶草种群花期和果期的生物量配置中，根状茎所占的比例较大，均超过50%，而生殖构件花、果所占的比例最小，约5%；（5）独叶草种群花粉萌发率只有4.01%，室内种子发芽率为零。 |
| 关键词: 有性生殖 独叶草 太白山 |
| DOI： |
| 分类号: |
| 基金项目:陕西省自然科学基金项目(98SM08) |
|
| Property of sexual reproduction of Kingdonia uniflora population in Mountain Taibai |
|
|
| Abstract: |
| The study was made on the reproductive phenology,rate of blossoming and seeding,pollen energy and property of thin seed and rate of seed germinate,configuration of biomass blossoming and seeding period of Kingdonia uniflora population.The results showed that:(1) Kingdonia uniflora population is plants whose blossom opening is early than leaf,and their prevalent blossoming period,prevalent seeding period and seeding maturity period is May 11 and June 30 and July 21 respectively;blossoming period are 29 days,seeding are 59 days and reproduction period are 108 days.(2) Rate of blossoming and seeding of Kingdonia uniflora population respectively is 13.20% and 40.59%.Difference is obvious in different community.Rate of blossoming and seeding of Kingdonia uniflora in Rhododendron clementinae subsp is larger,which respectively is 25.32% and 65.85%,but rate of blossoming and seeding of Kingdonia uniflora in Betulatilis only is 6.92% and 2.08%.(3) Average length and width and weight of a thousand seed of thin seed of Kingdonia uniflora population respectively is 0.667 cm and 0.111 cm and 1.780 g.Difference of size of seed in different community is not obvious,difference of weight of a thousand seed is not obvious.(4) The percent of rhizome is the largest in configuration of biomass of blossoming and seeding period of Kingdonia uniflora population,which exceeded 50%,but percent of blossom and seed in reproduction modular is smallest,about 5%.(5) Rate of pollen germinating of Kingdonia uniflora population is only 4.01%,and rate of seed in house is zero. |
| Key words: sexual reproduction Kingdonia uniflora Mountain Taibai |
