NDLI: Changes in phenolic metabolism in salicylic acid-treated shoots of Cistus heterophyllus

Content Provider	Springer Nature Link
Author	López Orenes, Antonio Martínez More, Juana M. Calderón, Antonio A. Ferrer, María A.
Copyright Year	2013
Abstract	The exogenous application of salicylic acid (SA) not only protects plants against stress, but also enhances their growth and productivity. In this study, proliferating shoots of Cistus heterophyllus subsp. carthaginensis, an endangered plant species, were incubated in the presence of 0, 10, 100, and 1,000 μM SA for a period of 2 months. Overall growth, phenylpropanoid metabolism and antioxidant capacity were then determined. At low SA concentration, the efficiency of photosystem II (PSII) and shoot growth remained stable, while chlorophyll and carotenoid levels increased. Furthermore, there were no major changes in the levels of H$_{2}$O$_{2}$ in the different treatments (less than 10 % compared with the control), but an increase in lipid peroxidation, proline content and free and bound SA concentrations was observed in 100 μM SA-treated shoots. SA treatments resulted in increased activities of phenylalanine ammonia lyase (EC 4.3.1.24) and soluble peroxidases (EC 1.11.1.7), which strongly correlated with the decrease in soluble flavanols and the increase of proanthocyanidins, whereas cell wall-bound peroxidases exhibited a SA-concentration-dependent down-regulation. The results provided evidence that the differences in SA-induced changes in phenolic metabolism, especially the oxidation of flavanols by soluble peroxidases, could serve as a backup defence system contributing to a reduction in oxidative cellular damage, as suggested by the high anti-lipid oxidation activity displayed by Cistus extracts.
Starting Page	417
Ending Page	427
Page Count	11
File Format	PDF
ISSN	01676857
Journal	Plant Cell, Tissue and Organ Culture (PCTOC)
Volume Number	113
Issue Number	3
e-ISSN	15735044
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-03-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cistus heterophyllus Phenylpropanoid metabolism Flavanols Proanthocyanidins Antioxidant activity Plant Sciences Plant Physiology Plant Genetics & Genomics Plant Pathology
Content Type	Text
Resource Type	Article
Subject	Horticulture

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