SEXUAL DIMORPHISM IN BIOMASS ALLOCATION AND CLONAL GROWTH OF XANTHOXYLUM AMERICANUM
SEXUAL DIMORPHISM IN BIOMASS ALLOCATION AND CLONAL GROWTH OF XANTHOXYLUM AMERICANUM
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DOI：
10.1002/j.1537-2197.1988.tb11249.x
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发表时间：
1988-11
影响因子：
3
通讯作者：
J. W. Popp;J. Reinartz
中科院分区：
文献类型：
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作者：
J. W. Popp;J. Reinartz
繁殖可能会产生很高的资源成本。有人认为，雌性雌雄异株植物在有性生殖方面的更多投资导致雌性的营养生长率低于雄性。本研究对雌雄异株克隆灌木北方花椒（Xanthoxylum americanum）的生物量分配和基株生长的性二型性进行了研究。在一个生长季节的过程中，生殖组织，叶片，地上第一年的木材生长的生物量的分配，进行了比较，在18个克隆生长在外地和6个克隆在树林中东南部威斯康星州在1985年和1986年。此外，每个克隆的芽数，和重量nonfirst-year木材（累积生物量）以上和地下进行了估计。在开放的领域网站，男性克隆分配更多的生物量，新的木材和生殖比女性少，虽然男性分配更多的花。因此，雄性无性系比雌性无性系具有更多的地上部和地下部生物量。在树林中，坐果率接近零，有几个显着差异，无论是在生物量分配或累积生物量的男性和女性之间的克隆。这些结果支持了这样的假设，即女性在水果生产中的高资源投资减少了他们的营养生长相对于男性。植物的有性生殖在开花所需的资源方面是昂贵的
Reproduction can have a high resource cost. It has been suggested that greater investments in sexual reproduction by female dioecious plants leads to a lower rate of vegetative growth in females than in males. In this study, we investigated sexual dimorphism in biomass allocation and genet growth ofthe dioecious clonal shrub, northern prickly ash (Xanthoxylum americanum). The allocation of biomass over the course of one growing season to reproductive tissue, leaves, and growth of aboveground first-year wood, was compared in 18 clones growing in fields and six clones in woods in southeastern Wisconsin during 1985 and 1986. In addition, the number of shoots per clone, and weight of nonfirst-year wood (accumulated biomass) above- and belowground were estimated. In open field sites, male clones allocated more biomass to new wood and less to reproduction than females, although males allocated more to flowers alone. Accordingly, male clones had significantly more shoots and more accumulated biomass both aboveand below-ground than female clones. In the woods, where fruit set was near zero, there were few significant differences between male and female clones in either biomass allocation or accumulated biomass. These results support the hypothesis that the high resource investment in fruit production by females reduces their vegetative growth relative to males. SEXUAL REPRODUCTION in plants is costly in terms of the resources required for flowering