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Sensitivity of Xanthoria parietina to UV-A: Role of metabolic modulators

Paper ID Volume ID Publish Year Pages File Format Full-Text
29677 44429 2011 8 PDF Available
Title
Sensitivity of Xanthoria parietina to UV-A: Role of metabolic modulators
Abstract

Effects of methyl jasmonate (MeJA), salicylic acid (SA) or 2-aminoindane-2-phosphonic acid (AIP) pre-treatments on the sensitivity of Xanthoria parietina exposed to UV-A were studied. UV decreased chlorophylls and stimulated increase in hydrogen peroxide and superoxide level. Accumulation of soluble phenols and flavonoids increased in response to UV treatment. Metabolic modulators had negligible impact on these UV-induced changes. Within free amino acids, AIP (−UV variant) and SA and MeJA (+UV variants) altered their accumulation. AIP had no effect on the amount of phenylalanine. Benzoic and cinnamic acids were elevated by UV and mainly MeJA influenced their accumulations. Among lichen specific metabolites, vulpinic acid and ergosterol increased while usnic acid and atranorin decreased after exposure to UV; accumulation of parietin was not affected. Applied modulators showed a different effect on these lichen metabolites but biosynthetic pathway-specific trend of alteration was visible. Overall, MeJA showed the most pronounced effect among studied parameters. Accumulation of selected phenolics in response to UV-A seems to be an important feature of Xanthoria tolerance. Present finding in the context of phenolic metabolism in non-vascular plants and with respect to limited data about effect of studied modulators on non-vascular plants are discussed.

► UV-A decreased chlorophylls, elevated ROS and had no effect on soluble proteins. ► Amounts of phenols and flavonoids increased ca. 50% in response to UV treatment. ► AIP (-UV variant), SA and MeJA (+UV variants) altered accumulation of amino acids. ► Benzoic and cinnamic acids increased in UV and mainly MeJA had significant effect. ► Modulators differently affected lichen metabolites but in a pathway-specific manner.

Keywords
Lichens; Mycobiont; Proline; Signaling compounds; Total soluble phenols
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 103, Issue 3, 2 June 2011, Pages 243–250
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us