Systemic Induction of Salicylic Acid Accumulation in Cucumber after Inoculation with Pseudomonas syringae pv syringae
TLDR
In this paper, Salicylic acid was found to be an endogenous inducer of resistance in Cucumis sativus L. plants with Pseudomonas syringae Pathovar Syringae.Abstract:
Inoculation of one true leaf of cucumber (Cucumis sativus L.) plants with Pseudomonas syringae pathovar syringae results in the systemic appearance of salicylic acid in the phloem exudates from petioles above, below, and at the site of inoculation. Analysis of phloem exudates from the petioles of leaves 1 and 2 demonstrated that the earliest increases in salicylic acid occurred 8 hours after inoculation of leaf 1 in leaf 1 and 12 hours after inoculation of leaf 1 in leaf 2. Detaching leaf 1 at intervals after inoculation demonstrated that leaf 1 must remain attached for only 4 hours after inoculation to result in the systemic accumulation of salicylic acid. Because the levels of salicylic acid in phloem exudates from leaf 1 did not increase to detectable levels until at least 8 hours after inoculation with P. s. pathovar syringae, the induction of increased levels of salicylic acid throughout the plant are presumably the result of another chemical signal generated from leaf 1 within 4 hours after inoculation. Injection of salicylic acid into tissues at concentrations found in the exudates induced resistance to disease and increased peroxidase activity. Our results support a role for salicylic acid as an endogenous inducer of resistance, but our data also suggest that salicylic acid is not the primary systemic signal of induced resistance in cucumber.read more
Citations
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Stress-Induced Phenylpropanoid Metabolism.
Richard A. Dixon,Nancy L. Paiva +1 more
TL;DR: Limiting discussion to stress-induced phenylpropanoids eliminates few of the structural classes, because many compounds that are constitutive in one plant species or tissue can be induced by various stresses in another species or in another tissue of the same plant.
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Systemic acquired resistance
W.E. Durrant,Xinnian Dong +1 more
TL;DR: A model describing the sequence of events leading from initial infection to the induction of defense genes is presented and exciting new data suggest that the mobile signal for SAR might be a lipid molecule.
Journal ArticleDOI
Salicylic Acid, a multifaceted hormone to combat disease.
TL;DR: Genetic studies reveal an increasingly complex network of proteins required for SA-mediated defense signaling, and this process is amplified by several regulatory feedback loops.
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Requirement of Salicylic Acid for the Induction of Systemic Acquired Resistance
Thomas Gaffney,Leslie Friedrich,Bernard Vernooij,David Vincent Negrotto,Gordon Nye,Scott Uknes,Eric R. Ward,Helmut Kessmann,John Ryals +8 more
TL;DR: Salicylic acid is essential for the development of systemic acquired resistance in tobacco and was investigated in transgenic tobacco plants harboring a bacterial gene encoding salicylate hydroxylase.
Journal ArticleDOI
Systemic Acquired Resistance
TL;DR: Current knowledge of molecular, biochemical and physiological mechanisms that are associated with systemic acquired resistance (SAR) are reviewed.
References
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Journal ArticleDOI
Salicylic acid : a likely endogenous signal in the resistance response of tobacco to viral infection
TL;DR: Findings suggest that salicylic acid functions as the natural transduction signal in resistant, but not susceptible, cultivars that synthesize pathogenesis-related proteins upon infection.
Journal ArticleDOI
Increase in Salicylic Acid at the Onset of Systemic Acquired Resistance in Cucumber
Jean-Pierre Métraux,H. Signer,John Ryals,Eric R. Ward,M. Wyss-Benz,J. Gaudin,K. Raschdorf,E. Schmid,W. Blum,B. Inverardi +9 more
TL;DR: Monitoring of cucumber plants inoculated with either tobacco necrosis virus or the fungal pathogen Colletotrichum lagenarium suggested that salicylic acid could function as the endogenous signal in the transmission of SAR in cucumber.
Journal ArticleDOI
Acetylsalicylic acid (aspirin) induces resistance to tobacco mosaic virus in tobacco.
TL;DR: Xanthi-nc becomes resistant to tobacco mosaic virus (TMV) and produces b proteins when injected with the interferon inducer polyacrylic acid and injection of acetylsalicylic acid (aspirin) induces resistance and the formation of new proteins in the White Burley and Samsun NN cultivars of tobacco.
Journal ArticleDOI
Isolation of a complementary DNA encoding a chitinase with structural homology to a bifunctional lysozyme/chitinase
Jean-Pierre Métraux,William Burkhart,Mary Pat Moyer,Sandra Dincher,Wayne Middlesteadt,Williams Shericca Cherrer,George Payne,Michael Carnes,John Ryals +8 more
TL;DR: Genomic Southern analysis indicates that a single gene in the cucumber genome encodes this protein, which was purified to homogeneity from tobacco necrosis virus-infected leaves of Cucumis sativis.
Journal ArticleDOI
Induction of systemic resistance to anthracnose in cucumber by phosphates.
H. D. Gottstein,J. A. Kuc +1 more
TL;DR: Induced resistance in leaves 3 and 4 depended on the concentration of K 3 PO 4 applied to leaves 1 and 2, which indicated systemic resistance to anthracnose caused by Colletotrichum lagenarium.