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Vincent D, Bui A, Ezernieks V, Shahinfar S, Luke T, Ram D, Rigas N, Panozzo J, Rochfort S, Daetwyler H, Hayden M. A community resource to mass explore the wheat grain proteome and its application to the late-maturity alpha-amylase (LMA) problem. Gigascience 2022; 12:giad084. [PMID: 37919977 PMCID: PMC10627334 DOI: 10.1093/gigascience/giad084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/02/2023] [Accepted: 09/19/2023] [Indexed: 11/04/2023] Open
Abstract
BACKGROUND Late-maturity alpha-amylase (LMA) is a wheat genetic defect causing the synthesis of high isoelectric point alpha-amylase following a temperature shock during mid-grain development or prolonged cold throughout grain development, both leading to starch degradation. While the physiology is well understood, the biochemical mechanisms involved in grain LMA response remain unclear. We have applied high-throughput proteomics to 4,061 wheat flours displaying a range of LMA activities. Using an array of statistical analyses to select LMA-responsive biomarkers, we have mined them using a suite of tools applicable to wheat proteins. RESULTS We observed that LMA-affected grains activated their primary metabolisms such as glycolysis and gluconeogenesis; TCA cycle, along with DNA- and RNA- binding mechanisms; and protein translation. This logically transitioned to protein folding activities driven by chaperones and protein disulfide isomerase, as well as protein assembly via dimerisation and complexing. The secondary metabolism was also mobilized with the upregulation of phytohormones and chemical and defence responses. LMA further invoked cellular structures, including ribosomes, microtubules, and chromatin. Finally, and unsurprisingly, LMA expression greatly impacted grain storage proteins, as well as starch and other carbohydrates, with the upregulation of alpha-gliadins and starch metabolism, whereas LMW glutenin, stachyose, sucrose, UDP-galactose, and UDP-glucose were downregulated. CONCLUSIONS To our knowledge, this is not only the first proteomics study tackling the wheat LMA issue but also the largest plant-based proteomics study published to date. Logistics, technicalities, requirements, and bottlenecks of such an ambitious large-scale high-throughput proteomics experiment along with the challenges associated with big data analyses are discussed.
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Affiliation(s)
- Delphine Vincent
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - AnhDuyen Bui
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - Vilnis Ezernieks
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - Saleh Shahinfar
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - Timothy Luke
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - Doris Ram
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
| | - Nicholas Rigas
- Agriculture Victoria Research, Grains Innovation Park, Horsham, VIC 3400, Australia
| | - Joe Panozzo
- Agriculture Victoria Research, Grains Innovation Park, Horsham, VIC 3400, Australia
- Centre for Agricultural Innovation, University of Melbourne, Parkville, VIC 3010, Australia
| | - Simone Rochfort
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC 3083, Australia
| | - Hans Daetwyler
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC 3083, Australia
| | - Matthew Hayden
- Agriculture Victoria Research, AgriBio, Center Centre for AgriBioscience, Bundoora, VIC 3083, Australia
- School of Applied Systems Biology, La Trobe University, Bundoora, VIC 3083, Australia
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Abstract
Biostimulants are agronomic tools that have been gaining importance in the reduction of fertilizer applications. They can improve the yield of cropping systems or preventing crop yield losses under abiotic stresses. Biostimulants can be composed of organic and inorganic materials and most of the components are still unknown. The characterization of the molecular mechanism of action of biostimulants can be obtained using the omics approach, which includes the determination of transcriptomic, proteomic, and metabolomic changes in treated plants. This review reports an overview of the biostimulants, taking stock on the recent molecular studies that are contributing to clarify their action mechanisms. The omics studies can provide an overall evaluation of a crop’s response, connecting the molecular changes with the physiological pathways activated and the performance with or without stress conditions. The multiple responses of plants treated with biostimulants must be correlated with the phenotype changes. In this context, it is also crucial to design an adequate experimental plan and statistical data analysis, in order to find robust correlations between biostimulant treatments and crop performance.
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