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Plant Ecology

, Volume 216, Issue 7, pp 989–998 | Cite as

Effect of soil pH on growth, nutrient uptake, and mycorrhizal colonization in exotic invasive Lygodium microphyllum

  • Pushpa G. SotiEmail author
  • Krish Jayachandran
  • Suzanne Koptur
  • John C. Volin
Article

Abstract

Lygodium microphyllum is an invasive exotic plant species taking over many sites in freshwater and moist habitats in Florida. Managing it has been a significant challenge for land resource managers and researchers due to its extensive rapid invasion. To assess the effects of soil pH on growth, nutrient uptake, and mycorrhizal colonization in the roots of L. microphyllum, we conducted a 60-day greenhouse experiment by growing it in pots filled with pH-adjusted soils to a range from 4.5 to 8.0. L. microphyllum was able to survive and grow at all soil pH levels; however, final biomass, relative growth rate, photosynthesis, and specific leaf area were all greater in soil pH 5.5–6.5 compared to the other treatments. Correspondingly, nitrogen concentration was also related to these four plant parameters. Root colonization by mycorrhizal fungi was higher in soil pH 5.5–7.5 and lowest for plants growing in 4.5 or 8.0 and was correlated with plant growth parameters as well as elemental concentration in the leaves. Soil pH 8.0 was not strong enough for a pronounced growth decline, thus further increasing soil pH could provide a desired outcome and merit further investigation, although its potential negative impact on native flora (both plants and microorganisms) would need to be assessed.

Keywords

Element toxicity Invasive species management Mycorrhizal fungi Plant–soil interactions Relative growth rate 

Notes

Acknowledgments

We thank Steven Oberbauer, Department of Biological Sciences, Florida International University and Stewart T Reed, USDA, ARS, Miami, Florida for their help in analyzing the samples. This research was supported by the Dissertation Evidence Acquisition Fellowship, to Pushpa Soti from the Graduate School, Florida International University.

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Copyright information

© Springer Science+Business Media Dordrecht 2015

Authors and Affiliations

  • Pushpa G. Soti
    • 1
    Email author
  • Krish Jayachandran
    • 1
  • Suzanne Koptur
    • 2
  • John C. Volin
    • 3
  1. 1.Department of Earth and EnvironmentFlorida International UniversityMiamiUSA
  2. 2.Department of Biological SciencesFlorida International UniversityMiamiUSA
  3. 3.Department of Natural Resources and the EnvironmentUniversity of ConnecticutStorrsUSA

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