首页> 中文期刊> 《生态环境学报》 >波斯婆婆纳的繁殖能力及其入侵原因探析

波斯婆婆纳的繁殖能力及其入侵原因探析

         

摘要

Invasive plants have become a hot research topic in recent years. For successful invasive species, the capacity of sexual and asexual reproduction contributes particularity and advantages to their invasion. Exploring the reproductive characteristics of certain invasive species can help us effectively respond and manage invasion from both ecological and economic perspectives. In this study, we examined the reproductive ability ofVeronica persica, with the aim of explaining how it can expand its distribution in a short period of time and finally become a worldwide invasive weed. We have conducted observational experiments on flowers and pollinators, surveys on the density of natural populations and segments of individual plant. We have also quantified the level of sexual and asexual reproduction inV. persica through the experiments of natural and artificial pollination, and common garden transplant and growth. The results showed that the sexual reproduction ofV. persica was pollinator-dependent and self-compatible. There was high level of fruit-set and seed-set under natural, self, and supplemental pollination, and the seeds germinated fast with 70% germination rate, suggesting a relatively strong sexual reproductive ability. Meanwhile, the density ofV. persica in natural populations was high, with highly developed stolons and around 8 ramets per genet. The transplant experiment ofV. persica yielded 83% survivorship and rapid growth of 6.5 cm in 40 days, indicating a high level of asexual reproduction. Our results have also pointed out that there is strong correlation between the vegetative growth and sexual reproduction inV. persica. As a whole, the strong reproductive ability and few restrictive environmental factors probably contribute a lot in the successful worldwide invasion of V. persica.%入侵植物是近年来生态关注的热点。成功入侵植物的有性和无性繁殖能力通常呈现特殊性和优势性。探究其繁殖特征,对于应对与管理植物入侵问题具有重要的生态与经济意义。以波斯婆婆纳(Veronica persica)为对象,多方面研究其繁殖能力,以期探究波斯婆婆纳在短时间内迅速扩张成为全球广泛入侵杂草的原因。进行了波斯婆婆纳开花与传粉机制的观察实验;对波斯婆婆纳自然种群的生长密度和植株构建进行调查;并通过自然传粉和人工授粉实验比较花、茎长、果实的差异,通过同质园移栽和生长实验对波斯婆婆纳的有性和无性繁殖能力进行量化和评价。结果表明,波斯婆婆纳的有性繁殖依赖于昆虫传粉,自交亲和;在自然环境、人工自花授粉和补充授粉3种方式下均有较高的座果率和结实率;种子萌发迅速,萌发率达70%,表明其有较强的有性繁殖能力。同时,波斯婆婆纳的营养生长密度大,匍匐茎发达,平均每个植株能产生8条左右的直立茎。波斯婆婆纳移栽实验的存活率达到83%,且茎长在40天平均增长6.5 cm,说明其具有较强的生长和无性繁殖能力。波斯婆婆纳的营养生长和有性繁殖之间有着极强的相关性。波斯婆婆纳繁殖能力强,环境限制因子少,为其成功地大范围扩张而成为全球广泛入侵杂草提供了重要条件。

著录项

  • 来源
    《生态环境学报》 |2016年第5期|795-800|共6页
  • 作者单位

    湖北大学资源环境学院;

    湖北武汉 430062;

    湖北大学资源环境学院;

    湖北武汉 430062;

    湖北省生物资源绿色转化协同创新中心;

    湖北武汉 430062;

    湖北大学资源环境学院;

    湖北武汉 430062;

    区域开发与环境响应湖北省重点实验室;

    湖北武汉 430062;

    湖北大学资源环境学院;

    湖北武汉 430062;

    湖北省生物资源绿色转化协同创新中心;

    湖北武汉 430062;

    区域开发与环境响应湖北省重点实验室;

    湖北武汉 430062;

  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 环境植物学;植物生态学和植物地理学;
  • 关键词

    无性繁殖; 传粉; 有性繁殖; 波斯婆婆纳;

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