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Metabolic Response of Strawberry (Fragaria x ananassa) Leaves Exposed to the Angular Leaf Spot Bacterium (Xanthomonas fragariae)

Title
Metabolic Response of Strawberry (Fragaria x ananassa) Leaves Exposed to the Angular Leaf Spot Bacterium (Xanthomonas fragariae)
Authors
Kim, Min-SunJin, Jong SungKwak, Youn-SigHwang, Geum-Sook
Ewha Authors
황금숙
SCOPUS Author ID
황금숙scopusscopus
Issue Date
2016
Journal Title
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
ISSN
0021-8561JCR Link1520-5118JCR Link
Citation
vol. 64, no. 9, pp. 1889 - 1898
Keywords
metabolic profilingdefense mechanismstrawberry leavesbacterial angular leafspotUPLC-QTOF/MS
Publisher
AMER CHEMICAL SOC
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
Plants have evolved various defense mechanisms against biotic stress. The most common mechanism involves the production of metabolites that act as defense compounds. Bacterial angular leaf spot disease (Xanthomonas fragariae) of the strawberry (Fragaria x ananassa) has become increasingly destructive to strawberry leaves and plant production. In this study, we examined metabolic changes associated with the establishment of long-term bacterial disease stress using UPLC-QTOF mass spectrometry. Infected leaves showed decreased levels of gallic acid derivatives and ellagitannins, which are related to the plant defense system. The levels of phenylalanine, tryptophan, and salicylic acid as precursors of aromatic secondary metabolites were increased in inoculated leaves, whereas levels of coumaric acid, quinic acid, and flavonoids were decreased in infected plants, which are involved in the phenylpropanoid pathway. In addition, phenylalanine ammonia-lyase (PAL) activity, a key enzyme in the phenylpropanoid pathway, was decreased following infection. These results suggest that long-term bacterial disease stress may lead to down-regulation of select molecules of the phenylpropanoid metabolic pathway in strawberry leaves. This approach could be applied to explore the metabolic pathway associated with plant protection/breeding in strawberry leaves.
DOI
10.1021/acs.jafc.5b05201
Appears in Collections:
자연과학대학 > 화학·나노과학전공 > Journal papers
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