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Agronomy 2017, 7(1), 15;

Metabolite Profiling for Leaf Senescence in Barley Reveals Decreases in Amino Acids and Glycolysis Intermediates

INRA-AgroParisTech, Institut Jean-Pierre Bourgin, UMR1318, ERL CNRS 3559, Saclay Plant Sciences, Versailles 78000, France
Author to whom correspondence should be addressed.
Academic Editor: Karin Krupinska
Received: 10 January 2017 / Revised: 26 January 2017 / Accepted: 6 February 2017 / Published: 17 February 2017
(This article belongs to the Special Issue Senescence of Crop Plants)
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Leaf senescence is a long developmental phase important for plant performance and nutrient management. Cell constituents are recycled in old leaves to provide nutrients that are redistributed to the sink organs. Up to now, metabolomic changes during leaf senescence have been mainly studied in Arabidopsis (Arabidopsis thaliana L.). The metabolite profiling conducted in barley (Hordeum vulgare L.) during primary leaf senescence under two nitrate regimes and in flag leaf shows that amino acids, hexose, sucrose and glycolysis intermediates decrease during senescence, while minor carbohydrates accumulate. Tricarboxylic acid (TCA) compounds changed with senescence only in primary leaves. The senescence-related metabolite changes in the flag leaf were globally similar to those observed in primary leaves. The effect of senescence on the metabolite changes of barley leaves was similar to that previously described in Arabidopsis except for sugars and glycolysis compounds. This suggests a different role of sugars in the control of leaf senescence in Arabidopsis and in barley. View Full-Text
Keywords: metabolome; leaf senescence; amino acids; glycolysis; TCA metabolome; leaf senescence; amino acids; glycolysis; TCA

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Avila-Ospina, L.; Clément, G.; Masclaux-Daubresse, C. Metabolite Profiling for Leaf Senescence in Barley Reveals Decreases in Amino Acids and Glycolysis Intermediates. Agronomy 2017, 7, 15.

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