The mechanisms behind the contrasting responses to waterlogging in black-grass (Alopecurus myosuroides) and wheat (Triticum aestivum)

A - Papers appearing in refereed journals

Harrison, C., Noleto-Dias, C., Ruvo, G., Hughes, D. J., Smith, D., Mead, A., Ward, J. L., Heuer, S. and Macgregor, D. 2024. The mechanisms behind the contrasting responses to waterlogging in black-grass (Alopecurus myosuroides) and wheat (Triticum aestivum). Functional Plant Biology. 51, p. FP23193. https://doi.org/10.1071/FP23193

AuthorsHarrison, C., Noleto-Dias, C., Ruvo, G., Hughes, D. J., Smith, D., Mead, A., Ward, J. L., Heuer, S. and Macgregor, D.
Abstract

Black-grass (Alopecurus myosuroides) is one of the most problematic agricultural weeds of Western Europe causing significant yield losses in winter wheat (Triticum aestivum) and other crops through competition for space and resources. Previous studies link black-grass patches to water-retaining soils, yet its specific adaptations to these conditions remain unclear. We designed pot-based waterlogging experiments to compare thirteen biotypes of black-grass and six cultivars of wheat. These showed that wheat roots induced aerenchyma when waterlogged whereas aerenchyma-like structures were constitutively present in black-grass and aerial biomass of waterlogged wheat was smaller, while black-grass was similar or larger. Variability in waterlogging responses within and between these species was correlated with transcriptomic and metabolomic changes in leaves of control or waterlogged plants. In wheat, transcripts associated with regulation and utilisation of phosphate compounds were upregulated and sugars and amino acids concentrations were increased. Black-grass biotypes showed limited molecular responses to waterlogging. Some black-grass amino acids were decreased and one transcript commonly upregulated was previously identified in screens for genes underpinning metabolism-based resistance to herbicides. Our findings provide insights into the different waterlogging tolerances of these species and may help to explain the previously observed patchiness of this weed’s distribution in wheat fields.

KeywordsWaterlogging tolerance; Black-grass; Wheat; Non-target site resistance; Aerenchyma; OPR1; Metabolomics; Transcriptomics; Metabolism-based herbicide resistance
Year of Publication2024
JournalFunctional Plant Biology
Journal citation51, p. FP23193
Digital Object Identifier (DOI)https://doi.org/10.1071/FP23193
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeGrowing Health [ISP]
Growing Health (WP1) - bio-inspired solutions for healthier agroecosystems: Understanding biointeractions
Output statusPublished
Publication dates
Online29 Feb 2024
Publication process dates
Accepted07 Feb 2024
PublisherCSIRO Publishing
ISSN1445-4408

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