Abstract
As an initial step towards evaluating whether mycorrhizas influence composition and diversity in calcareous fen plant communities, we surveyed root colonization by arbuscular mycorrhizal fungi (AMF) and dark septate endophytic fungi (DSE) in 67 plant species in three different fens in central New York State (USA). We found colonization by AMF and DSE in most plant species at all three sites, with the type and extent of colonization differing between monocots and dicots. On average, AMF colonization was higher in dicots (58±3%, mean±SE) than in monocots (13±4%) but DSE colonization followed the opposite trend (24±3% in monocots and 9±1% in dicots). In sedges and cattails, two monocot families that are often abundant in fens and other wetlands, AMF colonization was usually very low (<10%) in five species and completely absent in seven others. However, DSE colonization in these species was frequently observed. Responses of wetland plants to AMF and DSE are poorly understood, but in the fen communities surveyed, dicots appear to be in a better position to respond to AMF than many of these more abundant monocots (e.g., sedges and cattails). In contrast, these monocots may be more likely to respond to DSE. Future work directed towards understanding the response of these wetland plants to AMF and DSE should provide insight into the roles these fungal symbionts play in influencing diversity in fen plant communities.
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Acknowledgements
We are grateful for comments made by Ben Wolfe, Tim Fahey, Janice Thies, and anonymous reviewers on earlier drafts of this manuscript. Additionally, we are thankful for the help of several Cornell University undergraduates for their help in the laboratory and the field: Sara Alcorn, Julie Baribeau, Cristen Mendoza, Erin O’Neil, Alani Taylor, and Ben Wolfe. Lastly, we thank F. Robert Wesley, Carmen Chapin, and Kathy Bailey for providing data and expertise on fen plant communities, soils, and hydrology.
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Weishampel, P.A., Bedford, B.L. Wetland dicots and monocots differ in colonization by arbuscular mycorrhizal fungi and dark septate endophytes. Mycorrhiza 16, 495–502 (2006). https://doi.org/10.1007/s00572-006-0064-7
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DOI: https://doi.org/10.1007/s00572-006-0064-7