青藏高原天山报春高寒湿地种群的花期资源分配  

Resource Allocation of Primula nutans Population in the Alpine Wetland of the East Qinghai-Tibetan Plateau,China

作　　者：何亚平[1] 段元文[1] 费世民[2] 刘建全[1] 杨慧玲[1] 

机构地区：[1]中国科学院西北高原生物研究所高原生物适应与进化重点实验室,西宁810001 [2]四川省林业科学研究院,成都610081

出　　处：《应用与环境生物学报》2008年第2期180-186,共7页Chinese Journal of Applied and Environmental Biology

基　　金：中国科学院研究生创新项目;国家自然科学基金“重大研究计划”项目(No.90211006);国家自然科学基金(No.30572329);国家林业局生态环境与资源实验室资助~~

摘　　要：研究了青藏高原东部海北高寒湿地植物天山报春的花期资源分配.有性繁殖的天山报春根系投资较低(22·6%),地上投资大约是地下投资的4倍,花期繁殖投资占20·8%,具有相对较大的地上投资.天山报春对繁殖、茎叶和根系的绝对投资和相对投资均具有极为明显的个体效应,绝对投资和茎叶的相对投资均随着个体大小线性增加,而繁殖和根系的相对投资线性降低.天山报春各器官间资源的绝对投资均表现为相关生长,相对资源分配均为负相关,在繁殖和营养、繁殖和根系以及繁殖和茎叶器官间都表现为权衡关系,但在茎叶和根系间不为权衡关系.和资源分配一致,天山报春的繁殖适合度存在明显的个体大小依赖性.结合影响植物资源分配的各因素,探讨了个体效应在解释资源分配中的重要意义.The resource allocation of sexual plants at anthesis stage was first studied in a Primula nutans population in the alpine wetland of the east Qinghai - Tibetan Plateau. Using this plant species growing in the alpine wetland, some important questions were synthesized involved in the resource allocation and the significance of size-dependent effects was emphasized to explain the patterns of resource allocation. P. nutans of sexual reproduction allocated relatively few resources to underground （22.6%） and to reproductive organs （20. 8% ）, and the aboveground allocation was about four times more than the underground allocation, which indicated that wetland plants of sexual reproduction had relative higher underground allocation of resources. The absolute and relative resources allocated to reproduction, stem and underground part of P. nutans were obviously size-dependent, and the absolute allocation to all organs and relative allocation to stems increased, but the relative allocation to reproduction and underground decreased with the increasing of individual size. The absolute resource allocation among reproduction, stem organs and underground part exhibited correlation-growth regularity. There were trade-off relations between reproduction and vegetation, reproduction and underground, and reproduction and stem in the resource allocation of P. nutans, but not between underground and stem. As organ resource allocation, the reproduction fitness of P. nutans also was size-dependent, implying that the bigger indi- vidual had more flowers to produce more seeds. Combined with the factors influencing the resource allocation, the size-dependent effects at the individual level provided a good explanation for the resource allocation of plant. Fig 2, Tab 3, Ref 42

关 键 词：青藏高原 高寒湿地 天山报春 资源分配 繁殖投资 权衡 大小依赖 

分 类 号：Q948[生物学—植物学]