S10.12 Is the salicylic acid glucoside bioactive

J. Hennig; J. Malamy; D. F. Klessig; G. Grynkiewiez; J. Indulski

doi:10.1007/bf01210019

Salicylic acid and salicylic acid glucoside in xylem sap of Brassica napus infected with Verticillium longisporum

Journal of Plant Research ◽

10.1007/s10265-009-0237-5 ◽

2009 ◽

Vol 122 (5) ◽

pp. 571-579 ◽

Cited By ~ 40

Author(s):

Astrid Ratzinger ◽

Nadine Riediger ◽

Andreas von Tiedemann ◽

Petr Karlovsky

Keyword(s):

Salicylic Acid ◽

Brassica Napus ◽

Xylem Sap ◽

Verticillium Longisporum ◽

Salicylic Acid Glucoside

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Salicylic Acid Glucoside Acts as a Slow Inducer of Oxidative Burst in Tobacco Suspension Culture

Zeitschrift für Naturforschung C ◽

10.1515/znc-2004-9-1013 ◽

2004 ◽

Vol 59 (9-10) ◽

pp. 684-692 ◽

Cited By ~ 20

Author(s):

Tomonori Kawano ◽

Shigeo Tanaka ◽

Takashi Kadono ◽

Shoshi Muto

Keyword(s):

Cell Death ◽

Salicylic Acid ◽

Protein Kinase ◽

Suspension Culture ◽

Oxidative Burst ◽

Low Dose ◽

Secondary Messengers ◽

Salicylic Acid Glucoside ◽

Gradual Release ◽

Sa Signaling

Abstract Salicylic acid β-glucoside (SAG) is a storage form of a defense signal against pathogens, releasing free salicylic acid (SA), to meet the requirements in plants. Since excess SA induces locally restricted cell death following oxidative burst and Ca2+ influx in plants, the effects of SAG on cell viability, Ca2+ influx, and generation of superoxide (O•−) were examined in suspension-cultured tobacco BY-2 cells expressing aequorin. Among SA-related chemicals tested, only SAG induced the slow and long-lasting O2•− generation, although SAG was less active in acute O2•− generation, Ca2+ influx and induction of cell death. The prolonging action of SAG is likely due to gradual release of SA and the data suggested that a peroxidasedependent reaction is involved. Notably, pretreatment with low-dose SA (50 μm) enhanced the response to SAG by 2.5-fold. There are four possible secondary messengers in early SA signaling detectable in the BY-2 culture, namely O2•−, H2O2, Ca2+ and protein kinase (PK). If these messengers are involved in the low-dose SA-dependent priming for SAG response, they should be inducible by low-dose SA. Among the four SA-inducible signaling events, PK activation was excluded from the low-dose SA action since a much higher SA dose (> 0.4 mм) was required for PK activation.

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Production of Defense Phenolics in Tomato Leaves of Different Age

Molecules ◽

10.3390/molecules25214952 ◽

2020 ◽

Vol 25 (21) ◽

pp. 4952

Author(s):

Kateřina Dadáková ◽

Tereza Heinrichová ◽

Jan Lochman ◽

Tomáš Kašparovský

Keyword(s):

Salicylic Acid ◽

Pseudomonas Syringae ◽

Essential Role ◽

Total Phenolics ◽

Hydroxybenzoic Acid ◽

Defense Reaction ◽

Tomato Dc3000 ◽

Age Related ◽

Phenolic Profiles ◽

Salicylic Acid Glucoside

Phenolics play an essential role in the defense reaction of crop plants against pathogens. However, the intensity of their production induced by infection may differ during the life of a plant. Here, we identified age-related differences in phenolic biosynthesis in the pathosystem Solanum lycopersicum cv. Amateur and Pseudomonas syringae pv. tomato DC3000. We analyzed concentrations of total phenolics, phenolic profiles, and concentrations of selected phenolic acids. The influence of bacterial infection, together with leaf and plant age, was assessed. The changes in concentrations of caffeic acid, 4-hydroxybenzoic acid, and salicylic acid glucoside caused by infection were found to be influenced by age. In concrete, the increases in the concentrations of these metabolites were all evident only in young plants.

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