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首页> 外文学位 >An examination of the interactions between garlic mustard (Alliaria petiolata (Beib.) Cavara & Grande); and vesicular-arbuscular mycorrhizal (VAM) fungi.
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An examination of the interactions between garlic mustard (Alliaria petiolata (Beib.) Cavara & Grande); and vesicular-arbuscular mycorrhizal (VAM) fungi.

机译：检查大蒜芥末（Alliaria petiolata（Beib。）Cavara＆Grande）之间的相互作用；和水泡-丛枝菌根（VAM）真菌。

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摘要

In this study, I examined the mycorrhizal relationships of garlic mustard (Alliaria petiolata) in central Illinois, USA. Garlic mustard, an invasive nonmycorrhizal plant species, is naturalized in portions of the United States and Canada where it often displaces native herbaceous forest understory. I found little evidence for a direct effect of mycorrhizal fungi on the growth of garlic mustard. Total biomass production was not significantly different between plants grown in autoclaved soil with or without added vesicular-arbuscular mycorrhizal (VAM) fungal spores. However, garlic mustard root growth was reduced in the presence of VAM fungal inoculum. Root growth of garlic mustard was also less in nonautoclaved soil than in autoclaved soil. This difference may have been caused by greater competition from soil microbes for nutrients in nonautoclaved than autoclaved soil. Nevertheless, leachates of garlic mustard tissue suppressed spore germination of the VAM fungus Gigaspora rosea, depressed seed germination of tomato, and root growth of tomato and sorghum. When garlic mustard, mycorrhizal tomato, or no plants were grown in soil for sixty days, the decline in mycorrhizal inoculum potential (MIP) was significantly greater with garlic mustard than tomato. There was no significant difference in MIP decline between soil containing no plant or garlic mustard. There was a significant negative correlation between the density of garlic mustard plants in 10 cm x 10 cm quadrats, and the MIP of soil extracted from the upper 0-15 cm of soil within the quadrats. These results suggest that garlic mustard's success in invading forest understories where a high percentage (75%) of plant species are mycorrhizal may be partially due to its ability to interfere with the production of mycorrhizae.
机译：在这项研究中，我研究了美国伊利诺伊州中部的大蒜芥末（Alliaria petiolata）的菌根关系。大蒜芥末是一种入侵性非菌根植物，在美国和加拿大的部分地区已归化，在该地区，大蒜芥末经常取代天然的草本林。我几乎没有证据表明菌根真菌对蒜芥的生长具有直接作用。在有或没有添加水泡-丛枝菌根（VAM）真菌孢子的高压灭菌土壤中种植的植物之间，总生物量生产没有显着差异。但是，在VAM真菌接种物的存在下，大蒜芥末根的生长会降低。在非高压灭菌的土壤中，大蒜芥末的根生长也比在高压灭菌的土壤中少。这种差异可能是由于土壤微生物对非高压灭菌土壤比高压灭菌土壤中养分的竞争更大。尽管如此，大蒜芥末组织的浸出液仍能抑制VAM真菌罗氏沼虾的孢子萌发，抑制番茄的种子发芽，并抑制番茄和高粱的根系生长。当蒜芥，菌根番茄或没有植物在土壤中生长60天时，蒜芥的菌根接种潜力（MIP）下降明显大于番茄。没有植物或蒜芥的土壤之间的MIP下降没有显着差异。在10 cm x 10 cm的正方形中，大蒜芥菜植物的密度与从该正方形中的上部0-15 cm土中提取的土壤的MIP之间存在显着的负相关。这些结果表明，蒜芥在入侵森林的林下成功，其中百分之七十五（75％）的植物为菌根，这可能部分是由于其干扰菌根产生的能力。

著录项

  • 作者

    Roberts, Karl Joseph.;

  • 作者单位

    Illinois State University.;

  • 授予单位 Illinois State University.;
  • 学科 Ecology.;Botany.
  • 学位 Ph.D.
  • 年度 1997
  • 页码 87 p.
  • 总页数 87
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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