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  Effect of Senescence Phenotypes and Nitrate Availability on Wheat Leaf Metabolome during Grain Filling

Heyneke, E., Watanabe, M., Erban, A., Duan, G., Buchner, P., Walther, D., et al. (2019). Effect of Senescence Phenotypes and Nitrate Availability on Wheat Leaf Metabolome during Grain Filling. Agronomy, 9(6): 305. doi:10.3390/agronomy9060305.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-CD50-C Version Permalink: http://hdl.handle.net/21.11116/0000-0003-CD51-B
Genre: Journal Article

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 Creators:
Heyneke, E.1, Author              
Watanabe, M.1, Author              
Erban, A.2, Author              
Duan, Guangyou3, Author
Buchner, Peter3, Author
Walther, D.4, Author              
Kopka, J.2, Author              
Hawkesford, Malcolm John3, Author
Hoefgen, R.1, Author              
Affiliations:
1Amino Acid and Sulfur Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753337              
2Applied Metabolome Analysis, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753338              
3External Organizations, ou_persistent22              
4BioinformaticsCIG, Infrastructure Groups and Service Units, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753303              

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 Abstract: The capacity for optimising grain yield depends largely on the timing of senescence and the processes underlying efficient remobilisation and cycling of nutrients from source tissues to the developing grain. This study describes how metabolism is adjusted during senescence in response to varying nitrogen application rates after anthesis. A comprehensive metabolite analysis was performed in field-grown Avalon/Cadenza using segregating doubled haploid wheat genotypes having contrasting traits relating to timing of the onset of senescence. Correlative matrices of metabolites and yield parameters determined the metabolic networks that underlie these phenotypes, and were helpful for identifying unique metabolites that are indicative of timing of senescence. They also revealed robust correlations between steady increases in hexose levels, a late senescence phenotype and high straw yield associated with low N fertiliser levels. Tryptophan, cis-aconitate, phosphate and 1-kestose demonstrated strong perturbations in response to nitrogen availability and progression towards developmental senescence. A comprehensive metabolic map of wheat leaf primary metabolites yielded a cumulative readout of processes that occur during developmental ripening and contribute to grain filling in plants with differential senescence timing.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published in print
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 Identifiers: DOI: 10.3390/agronomy9060305
BibTex Citekey: agronomy9060305
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Title: Agronomy
Source Genre: Journal
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Pages: - Volume / Issue: 9 (6) Sequence Number: 305 Start / End Page: - Identifier: ISSN: 2073-4395