Genotypic variation and nitrogen stress effects on root anatomy in maize are node specific

Yang, Jennifer T.; Schneider, Hannah; Brown, Kathleen M.; Lynch, Jonathan P.

doi:10.1093/jxb/erz293

Cited by 55 publications

(62 citation statements)

References 72 publications

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“…Natural variation in these phenes has been hypothesized to indicate adaptive value of reduced metabolic burden in maize (Lynch, ). In general, the anatomical variation we observed was similar to other studies with maize grown in the field (Yang, et al, ; York et al, ) and in mesocosms (Burton et al, ; Chimungu et al, , ). The larger root diameters in MC‐14 and stronger phosphorus effect found in MC‐15 compared with MC‐14 may be attributable to the differences in phosphorus buffering of the two experiments, to a possible positive effect of mycorrhiza on root growth in MC‐14, or to a possible negative effect of F. verticillioides on root growth in MC‐15 (although we observed no significant effect of F. verticillioides on shoot growth; Figure S14).…”

Section: Discussionsupporting

confidence: 90%

“…Natural variation in these phenes has been hypothesized to indicate adaptive value of reduced metabolic burden in maize (Lynch, 2015). In general, the anatomical variation we observed was similar to other studies with maize grown in the field (Yang, et al, 2019;York et al, 2015) and in mesocosms (Burton et al, 2015;Chimungu et al, 2014aChimungu et al, , 2014b. Figure S14).…”

Section: Discussionsupporting

confidence: 88%

“…For example, the effect of node position of the nodal root system and the effects of node-specific anatomy on fungal colonization are interesting topics as fungal colonization may change during the season. Recent research has shown that anatomy across nodes significantly changes in younger roots(Yang et al, 2019). In the present study, we found that AMC did…”

supporting

confidence: 65%

“…For example, the effect of node position of the nodal root system and the effects of node‐specific anatomy on fungal colonization are interesting topics as fungal colonization may change during the season. Recent research has shown that anatomy across nodes significantly changes in younger roots (Yang et al, ). In the present study, we found that AMC did not differ among nodes under low‐phosphorus availability (Figure S9), but we speculate that further studies of the nodal colonization and root anatomy by node with more genotypes may reveal new patterns.…”

Section: Discussionmentioning

confidence: 99%

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

Galindo-Castañeda

Brown

Kuldau

et al. 2019

Plant Cell & Environment

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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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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 88%

supporting

confidence: 65%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

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

Galindo-Castañeda

Brown

Kuldau

et al. 2019

Plant Cell & Environment

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“…This report with a small panel of modern winter oilseed rape cultivars compared root phenotypes, field harvest and NUE components. Similar investigation sought to evaluate genotypic variation for root systems and NUE were successfully conducted in core sets of other crop species (Yang et al, 2019;Iqbal et al, 2020). To strengthen this pilot experiment, further studies with a larger diversity panel should assess yield stability in multi-environment trials and across N rates (Thorup-Kristensen and Kirkegaard, 2016;Stahl and Snowdon, 2018).…”

Section: Root Traits Observed At a Seedling Stage Are Predictors Of Fmentioning

confidence: 99%

Root Morphological Traits of Seedlings Are Predictors of Seed Yield and Quality in Winter Oilseed Rape Hybrid Cultivars

2020

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The root system is responsible for soil resources acquisition. Hence, optimizing crop root characteristics has considerable implications for agricultural production. This study evaluated a panel of twenty-eight European modern cultivars of oilseed rape (Brassica napus L.) cultivated in laboratory and field environments. Root morphology was screened using a high-throughput hydroponic growth system with two divergent nitrogen supplies. The panel showed an important diversity for biomass production and root morphological traits. Differences in root and shoot dry biomasses and lateral root length were mainly explained by the genotype, and differences in primary root length by nitrogen nutrition. The cultivars were tested in a pluriannual field trial. The field variation for yield and seed quality traits attributed to the genotype was more important than the year or the genotype × year interaction effects. The total root length measured at the seedling stage could predict the proportion of nitrogen taken up from the field and reallocated to seed organs, a component of the nitrogen use efficiency. The genetic interrelationship between cultivars, established with simple sequence repeat markers, indicated a very narrow genetic base. Positive correlations were found between the genetic distance measures, root morphological traits during nitrogen depletion and yield components. This study illustrates a root phenotyping screen in the laboratory with a proof of concept evaluation in the field. The results could assist future genetic improvements in oilseed rape for desirable root characteristics to reduce nutrient losses in the environment.

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Root Phenes for Improving Nutrient Capture in Low‐Fertility Environments

Strock

Schneider

2022

Plant Breeding Reviews

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Genotypic variation and nitrogen stress effects on root anatomy in maize are node specific

Abstract: Anatomical phenotypes of maize nodal roots vary significantly across nodes and nitrogen levels, which affects the evaluation of genotypic variation, allometry, and adaption among field-grown hybrid and inbred lines.

Cited by 55 publications

References 72 publications

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

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

Root Morphological Traits of Seedlings Are Predictors of Seed Yield and Quality in Winter Oilseed Rape Hybrid Cultivars

Root Phenes for Improving Nutrient Capture in Low‐Fertility Environments

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