Evaluation of recurrent selection for drought tolerant tall fescue (<i>Festuca arundinacea</i>) using rain‐out shelters

Qu, Yuanshuo; Green, Edwin J.; Bonos, Stacy A.; Meyer, William A.

doi:10.1111/jac.12570

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…Deep and functional root systems may delay water stress by providing a continuous supply of water during droughts (Garwood & Sinclair, 1979; Ludlow et al., 1989; Volaire et al., 1998), and thus strengthen dehydration avoidance in summer‐dry environments (Norton et al., 2016). Deep roots could help resolve the trade‐off between growth potential and dehydration survival during summer in non‐dormant plants (Keep et al., 2021) by accessing moist soil horizons (Errecart et al., 2020; Gonzalez‐Dugo et al., 2005), and deeper rooting is a sought‐after trait in breeding programs (Crush et al., 2007; Ludemann & Chapman, 2019; Qu et al., 2022).…”

Section: Introductionmentioning

confidence: 99%

Tall fescue tiller survival over summer in a subtropical environment: The role of the size and depth of root systems

Jáuregui,

Michelini,

Sevilla

et al. 2024

J Agronomy Crop Science

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Pasture persistence is a key determinant of the economic and environmental performance of pastoral animal production systems. Large and deep root systems that help resist summer water stress have been proposed as a relevant trait for vegetative persistence of perennial temperate forage species growing in subtropical climates or under future climatically challenging scenarios. In a previous study [Jauregui et al., 2017. Persistence of tall fescue in a subtropical environment: Tiller survival over summer in response to flowering control and nitrogen supply. Grass and Forage Science 72, 454–466] we have shown that nitrogen fertilization and grazing management aimed at ‘control flowering’ increased the survival of tall fescue tillers during harsh summers in Uruguay (lat. 32°S). Here we assessed: (i) to what extent tiller survival is mediated by root system size in spring and (ii) what consequences tiller survival entails for root mass, depth and morphology the following autumn. In two field experiments, significant increases in tiller survival in response to nitrogen fertilization and grazing management (+60% and +80% in 2011/12 and 2012/13, respectively) were not related to concomitant effects on the size or depth of the root system in spring (p > .10). Even when six‐fold within‐treatment variation in root mass was observed, within‐treatment variation in summer tiller survival was little affected (<15%, p = .08). In turn, differences in tiller survival over summer affected little root system characteristics the following autumn. Therefore, we found scant support for the hypothesis that large and deep root systems contribute to survival of tall fescue tillers in this subtropical humid climate. Except for soils with less than 30 mm of plant available water holding capacity, summer water deficits did not induce severe tiller mortality in tall fescue in this climate.

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Section: Introductionmentioning

confidence: 99%

Tall fescue tiller survival over summer in a subtropical environment: The role of the size and depth of root systems

Jáuregui,

Michelini,

Sevilla

et al. 2024

J Agronomy Crop Science

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Techniques of Plant Stress Management, Including Genetic Engineering, Agronomic Practices, and the Creation of New Crop Types

Siddique,

Ahmed,

Khan

2024

Molecular Dynamics of Plant Stress and Its Management

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Mycobiome Analysis of Tall Fescue Grass Under Drought Stress Using the Illumina MiSeq and Oxford Nanopore Technology MinION

Groben

Clarke

Kerkhof³

et al. 2023

Phytobiomes Journal

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The effects mycobiomes have on physiological traits in turfgrasses are poorly understood. Drought tolerance, an economically and ecologically important trait, can be influenced by symbiotic fungi. In this two-year study, we evaluated the mycobiome associated with tall fescue exposed to prolonged periods of drought stress in a rainout shelter. Twelve plants, comprised of six sets of half-sibs (progenies having one parent in common), one exhibiting a drought tolerant phenotype and the other a susceptible phenotype were selected for analysis each year. The mycobiomes associated with the shoot, root, and rhizosphere soil was evaluated for each tall fescue half-sib pair using both short-read Illumina MiSeq and long-read Oxford Nanopore Technology (ONT) MinION sequencing pipelines. Both platforms sequenced portions of the fungal nuclear ribosomal RNA genes. The Illumina MiSeq sequenced the internal transcribed spacer region (ITS, 600 bp), while the ONT MinION covered the small subunit, ITS, and partial large subunit (4,600 bp). Both sequencing pipelines revealed that the mycobiomes associated with the roots, shoots, and soil were significantly different. The ONT MinION pipeline identified more diverse fungal lineages and had higher taxonomic resolution compared to the Illumina pipeline. Our results also indicated that root pathogens may play a more important role than the endophytic or mycorrhizal symbionts in tall fescue drought stress tolerance.

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Evaluation of recurrent selection for drought tolerant tall fescue (Festuca arundinacea) using rain‐out shelters

Cited by 3 publications

References 42 publications

Tall fescue tiller survival over summer in a subtropical environment: The role of the size and depth of root systems

Tall fescue tiller survival over summer in a subtropical environment: The role of the size and depth of root systems

Techniques of Plant Stress Management, Including Genetic Engineering, Agronomic Practices, and the Creation of New Crop Types

Mycobiome Analysis of Tall Fescue Grass Under Drought Stress Using the Illumina MiSeq and Oxford Nanopore Technology MinION

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