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Title (Primary) Nutrients and environment influence arbuscular mycorrhizal colonization both independently and interactively in Schizachyrium scoparium
Author Frater, P.N.; Borer, E.T.; Fay, P.A.; Jin, V.; Knaeble, B.; Seabloom, E.; Sullivan, L.; Wedin, D.A.; Harpole, W.S.;
Journal Plant and Soil
Year 2018
Department PHYDIV;
Volume 425
Issue 1–2
Language englisch;
POF III (all) T11;
Supplements https://static-content.springer.com/esm/art%3A10.1007%2Fs11104-018-3597-6/MediaObjects/11104_2018_3597_MOESM1_ESM.pdf
https://static-content.springer.com/esm/art%3A10.1007%2Fs11104-018-3597-6/MediaObjects/11104_2018_3597_MOESM2_ESM.pdf
Keywords Arbuscular mycorrhizal fungi (AMF); Schizachyrium scoparium; Mycorrhizal root colonization; Ridge regression; Long-term nutrient fertilization
Abstract

Background and aims

Arbuscular mycorrhizal fungi (AMF) are important for plant nutrient and water acquisition. Much is known about how nutrient addition and environment affect AMF, but little is known about nutrient by environment interactions. We measured AMF colonization with nutrient additions and along an environmental gradient to assess these interactions.

Methods

We measured AMF colonization in roots of little bluestem (Schizachyrium scoparium (Michx) Nash) with nutrient addition and across an environmental gradient. We assessed how AMF colonization changed across different fertilization treatments, and used ridge regression to determine nutrient, environment, and nutrient by environment interaction variables that predicted AMF colonization.

Results

The addition of nitrogen decreased AMF colonization, while mean annual temperature (MAT) and soil pH both positively predicted the percentage of AMF colonization in Schizachyrium scoparium. Additionally, we found an interaction term between MAT and phosphorus treatments that significantly affected percent AMF colonization.

Conclusions

Our results show the importance of understanding environmental conditions on AMF as well as nutrient by environment interactions when assessing how AMF respond to nutrient addition. Here we present a full-factorial nutrient addition study along an environmental gradient to assess how AMF root colonization is influenced by abiotic factors in addition to nutrients.

ID 20270
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=20270
Frater, P.N., Borer, E.T., Fay, P.A., Jin, V., Knaeble, B., Seabloom, E., Sullivan, L., Wedin, D.A., Harpole, W.S. (2018):
Nutrients and environment influence arbuscular mycorrhizal colonization both independently and interactively in Schizachyrium scoparium
Plant Soil 425 (1–2), 493 - 506