Root cortical anatomy is associated with differential pathogenic and symbiotic fungal colonization in maize

Tania Galindo-Castañeda, Kathleen Marie Brown, Gretchen Anna Kuldau, Gregory W. Roth, Nancy G. Wenner, Swayamjit Ray, Hannah Schneider, Jonathan Paul Lynch

Research output: Contribution to journalArticle

Abstract

Root anatomical phenotypes vary among maize (Zea mays) cultivars and may have adaptive value by modifying the metabolic cost of soil exploration. However, the microbial trade-offs of these phenotypes are unknown. We hypothesized that nodal roots of maize with contrasting cortical anatomy have different patterns of mutualistic and pathogenic fungal colonization. Arbuscular mycorrhizal colonization in the field and mesocosms, root rots in the field, and Fusarium verticillioides colonization in mesocosms were evaluated in maize genotypes with contrasting root cortical anatomy. Increased aerenchyma and decreased living cortical area were associated with decreased mycorrhizal colonization in mesocosm and field experiments with inbred genotypes. In contrast, mycorrhizal colonization of hybrids increased with larger aerenchyma lacunae; this increase coincided with larger root diameters of hybrid roots. F. verticillioides colonization was inversely correlated with living cortical area in mesocosm-grown inbreds, and no relation was found between root rots and living cortical area or aerenchyma in field-grown hybrids. Root rots were positively correlated with cortical cell file number and inversely correlated with cortical cell size. Mycorrhizae and root rots were inversely correlated in field-grown hybrids. We conclude that root anatomy is associated with differential effects on pathogens and mycorrhizal colonization of nodal roots in maize.

Original languageEnglish (US)
Pages (from-to)2999-3014
Number of pages16
JournalPlant Cell and Environment
Volume42
Issue number11
DOIs
StatePublished - Nov 1 2019

Fingerprint

Zea mays
Anatomy
corn
root rot
Genotype
Mycorrhizae
Phenotype
Fusarium
Cell Size
phenotype
genotype
Soil
Cell Count
mycorrhizae
Costs and Cost Analysis
cells
pathogens
cultivars
aerenchyma
soil

All Science Journal Classification (ASJC) codes

  • Physiology
  • Plant Science

Cite this

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title = "Root cortical anatomy is associated with differential pathogenic and symbiotic fungal colonization in maize",
abstract = "Root anatomical phenotypes vary among maize (Zea mays) cultivars and may have adaptive value by modifying the metabolic cost of soil exploration. However, the microbial trade-offs of these phenotypes are unknown. We hypothesized that nodal roots of maize with contrasting cortical anatomy have different patterns of mutualistic and pathogenic fungal colonization. Arbuscular mycorrhizal colonization in the field and mesocosms, root rots in the field, and Fusarium verticillioides colonization in mesocosms were evaluated in maize genotypes with contrasting root cortical anatomy. Increased aerenchyma and decreased living cortical area were associated with decreased mycorrhizal colonization in mesocosm and field experiments with inbred genotypes. In contrast, mycorrhizal colonization of hybrids increased with larger aerenchyma lacunae; this increase coincided with larger root diameters of hybrid roots. F. verticillioides colonization was inversely correlated with living cortical area in mesocosm-grown inbreds, and no relation was found between root rots and living cortical area or aerenchyma in field-grown hybrids. Root rots were positively correlated with cortical cell file number and inversely correlated with cortical cell size. Mycorrhizae and root rots were inversely correlated in field-grown hybrids. We conclude that root anatomy is associated with differential effects on pathogens and mycorrhizal colonization of nodal roots in maize.",
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Root cortical anatomy is associated with differential pathogenic and symbiotic fungal colonization in maize. / Galindo-Castañeda, Tania; Brown, Kathleen Marie; Kuldau, Gretchen Anna; Roth, Gregory W.; Wenner, Nancy G.; Ray, Swayamjit; Schneider, Hannah; Lynch, Jonathan Paul.

In: Plant Cell and Environment, Vol. 42, No. 11, 01.11.2019, p. 2999-3014.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Root cortical anatomy is associated with differential pathogenic and symbiotic fungal colonization in maize

AU - Galindo-Castañeda, Tania

AU - Brown, Kathleen Marie

AU - Kuldau, Gretchen Anna

AU - Roth, Gregory W.

AU - Wenner, Nancy G.

AU - Ray, Swayamjit

AU - Schneider, Hannah

AU - Lynch, Jonathan Paul

PY - 2019/11/1

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N2 - Root anatomical phenotypes vary among maize (Zea mays) cultivars and may have adaptive value by modifying the metabolic cost of soil exploration. However, the microbial trade-offs of these phenotypes are unknown. We hypothesized that nodal roots of maize with contrasting cortical anatomy have different patterns of mutualistic and pathogenic fungal colonization. Arbuscular mycorrhizal colonization in the field and mesocosms, root rots in the field, and Fusarium verticillioides colonization in mesocosms were evaluated in maize genotypes with contrasting root cortical anatomy. Increased aerenchyma and decreased living cortical area were associated with decreased mycorrhizal colonization in mesocosm and field experiments with inbred genotypes. In contrast, mycorrhizal colonization of hybrids increased with larger aerenchyma lacunae; this increase coincided with larger root diameters of hybrid roots. F. verticillioides colonization was inversely correlated with living cortical area in mesocosm-grown inbreds, and no relation was found between root rots and living cortical area or aerenchyma in field-grown hybrids. Root rots were positively correlated with cortical cell file number and inversely correlated with cortical cell size. Mycorrhizae and root rots were inversely correlated in field-grown hybrids. We conclude that root anatomy is associated with differential effects on pathogens and mycorrhizal colonization of nodal roots in maize.

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