We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Fungal nutrient allocation in common mycorrhizal networks is regulated by the carbon source strength of individual host plants.
- Authors
Fellbaum, Carl R.; Mensah, Jerry A.; Cloos, Adam J.; Strahan, Gary E.; Pfeffer, Philip E.; Kiers, E. Toby; Bücking, Heike
- Abstract
Common mycorrhizal networks ( CMNs) of arbuscular mycorrhizal ( AM) fungi in the soil simultaneously provide multiple host plants with nutrients, but the mechanisms by which the nutrient transport to individual host plants within one CMN is controlled are unknown., Using radioactive and stable isotopes, we followed the transport of phosphorus ( P) and nitrogen ( N) in the CMNs of two fungal species to plants that differed in their carbon ( C) source strength, and correlated the transport to the expression of mycorrhiza-inducible plant P ( Mt Pt4) and ammonium ( 1723.m00046) transporters in mycorrhizal roots., AM fungi discriminated between host plants that shared a CMN and preferentially allocated nutrients to high-quality (nonshaded) hosts. However, the fungus also supplied low-quality (shaded) hosts with nutrients and maintained a high colonization rate in these plants. Fungal P transport was correlated to the expression of Mt Pt4. The expression of the putative ammonium transporter 1723.m00046 was dependent on the fungal nutrient supply and was induced when the CMN had access to N., Biological market theory has emerged as a tool with which the strategic investment of competing partners in trading networks can be studied. Our work demonstrates how fungal partners are able to retain bargaining power, despite being obligately dependent on their hosts.
- Subjects
MYCORRHIZAL fungi; HOST plants; PLANT nutrients; CHEMICAL composition of plants; PHOSPHORUS; NITROGEN content of plants; STABLE isotopes
- Publication
New Phytologist, 2014, Vol 203, Issue 2, p646
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1111/nph.12827