Root cortical anatomy is associated with differential pathogenic and symbiotic fungal colonization in maize
| Autor: | Tania Galindo-Castañeda, Kathleen M. Brown, Gregory W. Roth, Swayamjit Ray, Hannah M. Schneider, Gretchen A. Kuldau, Nancy G. Wenner, Jonathan P. Lynch |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
0301 basic medicine Fusarium Physiology Plant Science Biology 01 natural sciences Plant Roots Zea mays Aerenchyma Mesocosm 03 medical and health sciences Mycorrhizae Fungal colonization Colonization Cultivar mycorrhizae Symbiosis Soil Microbiology Hybrid Plant Diseases Mycelium food and beverages Anatomy plant roots biology.organism_classification soil microbiology 030104 developmental biology Phenotype Soil microbiology plant diseases 010606 plant biology & botany |
| Zdroj: | Plant Cell and Environment 42 (2019) 11 Plant Cell and Environment, 42(11), 2999-3014 |
| ISSN: | 1365-3040 0140-7791 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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