生物多样性 ›› 2021, Vol. 29 ›› Issue (1): 0-0.DOI: 10.17520/biods.2020072

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植物氮形态利用策略及其对外来植物入侵性的影响

孙思邈1  陈吉欣1  冯炜炜1    1    1 
  1,2  孙建坤1  刘明超1*  冯玉龙1*   

  1. 1 (辽宁省全球变化与生物入侵重点实验室, 沈阳农业大学生物科学技术学院, 沈阳 110866)

    2 (台州学院生命科学学院, 浙江台州 318000)

  • 收稿日期:2020-03-02 修回日期:2020-06-01 出版日期:2021-01-20 发布日期:2020-09-01
  • 通讯作者: 冯玉龙

Plant strategies for nitrogen acquisition and their effects on exotic plant invasions

Simiao Sun1, Jixin Chen1, Weiwei Feng1, Chang Zhang1, Kai Huang1, Ming Guan1,2, Jiankun Sun1, Mingchao Liu1*, Yulong Feng1*   

  1. 1 Liaoning Key Laboratory for Biological Invasions and Global Changes, College of BioScience and BioTechnology, Shengyang Agricultural University, Shenyang 110866

    2 School of Life Sciences, Taizhou University, Taizhou, Zhejiang 318000

  • Received:2020-03-02 Revised:2020-06-01 Online:2021-01-20 Published:2020-09-01
  • Contact: Yuloong Feng

摘要: 氮是影响外来植物入侵性的重要因素之一, 但相关研究多关注土壤氮水平的效应, 较少考虑氮形态的作用。为从土壤氮形态利用的角度阐释外来植物的入侵机制, 本文在植物氮形态利用策略分析的基础上, 综述了外来植物氮形态利用的偏好性及其对入侵性的影响。植物具有偏好性和可塑性两种不同的氮形态利用策略, 这可能与植物对土壤氮形态特性的长期适应有关; 植物不仅可以对土壤氮形态做出响应, 而且还能改造土壤氮形态, 并对改变后的土壤氮形态做出反馈响应。很多外来植物入侵硝氮占优势的干扰生境, 偏好硝氮的外来植物与本地植物竞争硝氮; 而偏好铵氮的外来植物通过抑制土壤硝化作用, 营造铵氮环境, 促进自身生长, 同时抑制偏好硝氮的本地植物生长。然而, 植物氮形态利用策略不是一成不变的, 而是受多种生物和非生物因素共同作用影响的复杂过程, 今后应加强多因素交互作用对外来入侵植物氮形态利用策略的影响及机制研究, 更好地揭示氮形态利用策略、尤其是氮形态利用的可塑性与外来植物入侵性的关系。

关键词: 植物氮形态利用策略, 氮形态偏好, 氮形态塑性, 土壤氮形态, 适应进化, 外来植物入侵

Abstract: Available nitrogen is a major factor that influences invasion success of exotic plants. However, our understanding behind the effects of different forms of soil nitrogen on exotic plant invasions remains inconclusive. To elucidate invasion mechanisms of exotic plants in context of soil nitrogen, we reviewed nitrogen form preferences of invasive plants and their effects on invasiveness in comparison to native plant strategies. Different plants have different nitrogen acquisition strategies, including preference and plasticity, which may be associated with long-term adaptive characteristics and occur at different scales. In addition, some plants can modulate soil nitrogen forms, and respond to altered soil nitrogen. Many invasive plants succeed in disturbed habitats where nitrate is the dominant form of soil nitrogen, as invasive plants prefer nitrate and compete for nitrate with co-occurring native plants. Whereas ammonium-preferring invasive plants may accumulate ammonium in soil by inhibiting soil nitrification, thereby facilitating their own growth and inhibiting native plant growth, further contributing to invasion success. However, plant strategies for nitrogen acquisition are not invariable and can be influenced by many biotic and abiotic factors and interactions. Therefore, in future research we should study plant nitrogen acquisition strategies along with their ecological and evolutionary mechanisms in conjunction with ecosystem and environmental factors.

Key words: adaptive evolution, exotic plant invasions, plant nitrogen form preference, plant strategies for using different nitrogen forms, plasticity of nitrogen form utilization, soil nitrogen forms