No Reproductive Interference from an Alien to a Native Species in Cerastium (Caryophyllaceae) at the Stage of Seed Production
No Reproductive Interference from an Alien to a Native Species in Cerastium (Caryophyllaceae) at the Stage of Seed Production
复制标题
DOI：
10.5402/2012/193807
复制
发表时间：
2012-12
期刊：
影响因子：
--
通讯作者：
K. Takakura
中科院分区：
文献类型：
--
作者：
K. Takakura
生殖干扰，即交配过程中不利的种间相互作用，被认为是物种之间物种迁移的强大驱动因素。最近的实证报告描述了其在生物入侵中的重要性。这项研究的目的是测试日本本土的一种稀有草本植物物种是否受到外来物种角藻属的生殖干扰。进行了实地观察和移植实验，以确定与外来物种共存对本地物种种子生产的影响。结果表明，与外来物种共存并没有显着减少种子数量，但仅在田间观察中显着影响种子重量。在这项研究中，仅在种子生产阶段或之前检查了本地物种的繁殖过程。由于种间花粉转移可能产生生活力或生育力较低的杂种，因此本研究不能否认生殖干扰。为了测试后期阶段的生殖干扰，应该进行额外的研究。因此，在某些物种中，检测生殖干扰需要很高的成本。基于这些结果和建议，讨论了缩小生殖干扰测试目标物种的必要性，以阐明生殖干扰的普遍性。
Reproductive interference, adverse interspecific interaction during the mating process, has been regarded as a powerful driver of species displacement between species. Recent empirical reports have described its importance in biological invasions. This study was undertaken to test whether a rare herbaceous plant species indigenous to Japan suffered reproductive interference from an alien species of the genus Cerastium. Field observations and a transplanting experiment were conducted to ascertain the effects of coexistence with an alien species on the seed production of the native species. Results show that coexistence with the alien species did not significantly decrease seed numbers, but it significantly affected the seed weight only in field observations. In this study, the reproductive process of the native species was examined only at or before the seed production stage. Because the interspecific pollen transfer might produce hybrids with low viability or fertility, reproductive interference cannot be denied in this study. To test reproductive interference at such latter stages, additional studies should be conducted. Consequently, detection of reproductive interference demands high costs in some species. Based on these results and suggestions, the necessity of narrowing down the target species for testing of reproductive interference is discussed to elucidate the universality of reproductive interference.