Root cap is an important determinant of rhizosphere microbiome assembly

Summary Plants impact the development of their rhizosphere microbial communities. It is yet unclear to what extent the root cap and specific root zones contribute to microbial community assembly. To test the roles of root caps and root hairs in the establishment of microbiomes along maize roots (Zea...

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Bibliographic Details
Published in:The New phytologist Vol. 239; no. 4; pp. 1434 - 1448
Main Authors: Rüger, Lioba, Ganther, Minh, Freudenthal, Jule, Jansa, Jan, Heintz‐Buschart, Anna, Tarkka, Mika Tapio, Bonkowski, Michael
Format: Journal Article
Language:English
Published: England Wiley Subscription Services, Inc 01.08.2023
Subjects:
Active control
Archaea
Assembly
Bacteria
Cercozoa
Community composition
community structure
Composition
Corn
Defence mechanisms
Gene expression
Hairless
Immune response
Immunity
Inbreeding
maize
Microbial activity
microbial communities
microbiome
Microbiomes
Microbiota
Microorganisms
molecular control points
mutants
Plant Roots - microbiology
prokaryotic cells
Protists
Rhizosphere
rhizosphere microbiome
root cap
root exudates
Root hairs
Roots
Soil Microbiology
Trophic levels
Zea mays
Zea mays - genetics
root cap
bacteria
rhizosphere microbiome
root exudates
protists
molecular control points
root hairs
maize
ISSN:0028-646X, 1469-8137, 1469-8137
Online Access:Get full text
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Summary:Summary Plants impact the development of their rhizosphere microbial communities. It is yet unclear to what extent the root cap and specific root zones contribute to microbial community assembly. To test the roles of root caps and root hairs in the establishment of microbiomes along maize roots (Zea mays), we compared the composition of prokaryote (archaea and bacteria) and protist (Cercozoa and Endomyxa) microbiomes of intact or decapped primary roots of maize inbred line B73 with its isogenic root hairless (rth3) mutant. In addition, we tracked gene expression along the root axis to identify molecular control points for an active microbiome assembly by roots. Absence of root caps had stronger effects on microbiome composition than the absence of root hairs and affected microbial community composition also at older root zones and at higher trophic levels (protists). Specific bacterial and cercozoan taxa correlated with root genes involved in immune response. Our results indicate a central role of root caps in microbiome assembly with ripple‐on effects affecting higher trophic levels and microbiome composition on older root zones.
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ISSN:0028-646X
1469-8137
1469-8137
DOI:10.1111/nph.19002