Fungal community assembly in drought-stressed sorghum shows stochasticity, selection, and universal ecological dynamics

Cheng Gao, Liliam Montoya, Ling Xu, Mary Madera, Joy Hollingsworth, Elizabeth Purdom, Vasanth Singan, John Vogel, Robert B. Hutmacher, Jeffery A. Dahlberg, Devin Coleman-Derr, Peggy G. Lemaux and John W. Taylor ()
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Cheng Gao: University of California
Liliam Montoya: University of California
Ling Xu: University of California
Mary Madera: University of California
Joy Hollingsworth: University of California Kearney Agricultural Research & Extension Center
Elizabeth Purdom: University of California
Vasanth Singan: Department of Energy Joint Genome Institute, 1 Cyclotron Rd.
John Vogel: Department of Energy Joint Genome Institute, 1 Cyclotron Rd.
Robert B. Hutmacher: University of California West Side Research & Extension Center, UC Davis Department of Plant Sciences
Jeffery A. Dahlberg: University of California Kearney Agricultural Research & Extension Center
Devin Coleman-Derr: University of California
Peggy G. Lemaux: University of California
John W. Taylor: University of California

Nature Communications, 2020, vol. 11, issue 1, 1-14

Abstract: Abstract Community assembly of crop-associated fungi is thought to be strongly influenced by deterministic selection exerted by the plant host, rather than stochastic processes. Here we use a simple, sorghum system with abundant sampling to show that stochastic forces (drift or stochastic dispersal) act on fungal community assembly in leaves and roots early in host development and when sorghum is drought stressed, conditions when mycobiomes are small. Unexpectedly, we find no signal for stochasticity when drought stress is relieved, likely due to renewed selection by the host. In our experimental system, the host compartment exerts the strongest effects on mycobiome assembly, followed by the timing of plant development and lastly by plant genotype. Using a dissimilarity-overlap approach, we find a universality in the forces of community assembly of the mycobiomes of the different sorghum compartments and in functional guilds of fungi.

Date: 2020
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DOI: 10.1038/s41467-019-13913-9

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