Endogenous salicylic acid shows different correlation with baicalin and baicalein in the medicinal plant Scutellaria baicalensis Georgi subjected to stress and exogenous salicylic acid

Salicylic acid (SA) is synthesized via the phenylalanine lyase (PAL) and isochorismate synthase (ICS) pathways and can influence the stress response in plants by regulating certain secondary metabolites. However, the association between SA and particular secondary metabolites in the Chinese medicina...

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Bibliographic Details
Published in:PloS one 2018-02, Vol.13 (2), p.e0192114-e0192114
Main Authors: Su, Hu, Song, Shurui, Yan, Xin, Fang, Limin, Zeng, Bin, Zhu, Youlin
Format: Article
Language:English
Subjects:
Abiotic stress
Acids
Ammonia
Arabidopsis
Baicalin
Biology and Life Sciences
Biosynthesis
Botanical research
Correlation
Drought
Ecology and Environmental Sciences
Gene expression
Herbal medicine
Isochorismate synthase
Life sciences
Medicinal plants
Metabolites
Pharmaceutical research
Phenylalanine
Physiology
Plant metabolites
Plant physiology
Polyethylene glycol
Properties
Research and Analysis Methods
Salicylic acid
Salts
Scullcap
Scutellaria baicalensis
Secondary metabolites
Seedlings
Stresses
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Summary:Salicylic acid (SA) is synthesized via the phenylalanine lyase (PAL) and isochorismate synthase (ICS) pathways and can influence the stress response in plants by regulating certain secondary metabolites. However, the association between SA and particular secondary metabolites in the Chinese medicinal plant Scutellaria baicalensis Georgi is unclear. To elucidate the association between SA and the secondary metabolites baicalin and baicalein, which constitute the primary effective components of S. baicalensis, we subjected seedlings to drought and salt stress and exogenous SA treatment in a laboratory setting and tested the expression of PAL and ICS, as well as the content of free SA (FSA), total SA (TSA), baicalin, and baicalein. We also assessed the correlation of FSA and TSA with PAL and ICS, and with baicalin and baicalein accumulation, respectively. The results indicated that both FSA and TSA were positively correlated with PAL, ICS, and baicalin, but negatively correlated with baicalein. The findings of this study improve our understanding of the manner in which SA regulates secondary metabolites in S. baicalensis.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0192114