The Role of Benzoic Acid Derivatives in Systemic Acquired Resistance

1996 ◽  
pp. 253-263 ◽  
Author(s):  
Scott Uknes ◽  
Shericca Morris ◽  
Bernard Vernooij ◽  
John Ryals
Keyword(s):  
Benzoic Acid ◽  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Benzoic Acid Derivatives

Benzoic acid, salicylic acid, and the role of black galls on aspen in protection against decay

1995 ◽  
Vol 25 (9) ◽  
pp. 1479-1483 ◽  
Author(s):  
M. Gabrielle Pausler ◽  
William A. Ayer ◽  
Yasuyuki Hiratsuka
Keyword(s):  
Salicylic Acid ◽  
Benzoic Acid ◽  
Systemic Acquired Resistance ◽  
Analytical Procedure ◽  
Acquired Resistance ◽  
Significant Activity ◽  
High Concentration ◽  
Signal Molecule ◽  
Acidic Components

Trembling aspen (Populustremuloides Michx.) bearing certain types of black galls have a lower incidence of Phellinustremulae (Bond.) Bond. & Boriss. heartwood rot than do nongall-bearing trees. Extraction of finely ground black gall tissue with ethyl acetate and separation of the acidic components of the extract led to the isolation of benzoic acid, trans-cinnamic acid, p-hydroxybenzoic acid, p-hydroxycinnamic acid, naringenin, 7′-methyl-3-hydroxynaringen, aromadendrin, and taxifolin. Bioassays revealed that among these compounds, only benzoic acid showed significant activity against P. tremulae. An analytical procedure was developed to measure the concentration of benzoic acid in various types of aspen tissue. Tissue from the black galls showed a high concentration of benzoic acid, and tissue from gall-bearing trees contained significantly more benzoic acid than healthy nongalled trees. However, the amount of benzoic acid present in the gall-bearing trees may not be sufficient to prevent Phellinus decay. It is suggested that perhaps the benzoic acid serves as a precursor of salicylic acid, a signal molecule in systemic acquired resistance of plants.

scholarly journals Long distance movement of DIR1 and investigation of the role of DIR1-like during systemic acquired resistance in Arabidopsis

2013 ◽  
Vol 4 ◽  
Author(s):  
Marc J. Champigny ◽  
Marisa Isaacs ◽  
Philip Carella ◽  
Jennifer Faubert ◽  
Pierre R. Fobert ◽  
...  
Keyword(s):  
Systemic Acquired Resistance ◽  
Acquired Resistance ◽  
Long Distance ◽  
Long Distance Movement

scholarly journals Studies on Activation of Systemic Acquired Resistance (SAR) by Heterocyclic Compounds Having Azole Groups in Vigna radiata (L.) Wilczek.

2012 ◽  
Vol 40 (1) ◽  
pp. 74 ◽  
Author(s):  
Indu RAVI ◽  
Shipra VARSHNEY ◽  
Gunjan SHARMA ◽  
Vandana DWIVEDI ◽  
Kambaska Kumar BEHERA
Keyword(s):  
Vigna Radiata ◽  
Heterocyclic Compounds ◽  
Systemic Acquired Resistance ◽  
Biological Activities ◽  
Acquired Resistance ◽  
Flavonoid Content ◽  
Polyphenol Content ◽  
Pal Activity ◽  
New Compounds

Heterocyclic compounds are known to activate the defense response or resistance in plants. In order to study their effect as activatorsof systemic acquired resistance (SAR), two series of heterocyclic compounds having azole group were used for the present study i.e.,substituted triazolothiadiazoles and thiazolidine thioureas to obtain new compounds with improved biological activities in mung beans(Vigna radiata (L.)Wilczek, is an important pulse crop of India. These compounds could be used as a solution to chemically mediateddisease control both at the farm level as well as chemical fungicides. For this polyphenol content, flavonoid content, PAL activity,peroxidase activity and protein content were determined in control and after chemical treatment in mung beans var. ‘RMG-344’. Theresults indicated significant changes and a distinct role of polyphenols, flavonoids, PAL, peroxidase and proteins in the defense responseof mung beans after treatment with these chemicals.

scholarly journals Trichoderma asperelloides enhances local and systemic acquired resistance response under low nitrate nutrition in Arabidopsis

2018 ◽  
Author(s):  
Aakanksha Wany ◽  
Pradeep K. Pathak ◽  
Alisdair R Fernie ◽  
Kapuganti Jagadis Gupta
Keyword(s):  
Pseudomonas Syringae ◽  
Systemic Acquired Resistance ◽  
N Uptake ◽  
Acquired Resistance ◽  
Marker Genes ◽  
Defense Gene Expression ◽  
Resistance Response ◽  
Defense Gene ◽  
Protein Levels

AbstractNitrogen (N) is essential for growth, development and defense but, how low N affects defense and the role of Trichoderma in enhancing defense under low nitrate is not known. Low nitrate fed Arabidopsis plants displayed reduced growth and compromised local and systemic acquired resistance responses when infected with both avirulent and virulent Pseudomonas syringae DC3000. These responses were enhanced in the presence of Trichoderma. The mechanism of increased local and systemic acquired resistance mediated by Trichoderma involved increased N uptake and enhanced protein levels via modulation of nitrate transporter genes. The nrt2.1 mutant is compromised in local and systemic acquired resistance responses suggesting a link between enhanced N transport and defense. Enhanced N uptake was mediated by Trichoderma elicited nitric oxide (NO). Low NO producing nia1,2 mutant and nsHb+ over expressing lines were unable to induce nitrate transporters and thereby compromised defense in the presence of Trichoderma under low N suggesting a signaling role of Trichoderma elicited NO. Trichoderma also induced SA and defense gene expression under low N. The SA deficient NahG transgenic line and the npr1 mutant were also compromised in Trichoderma-mediated local and systemic acquired resistance responses. Collectively our results indicated that the mechanism of enhanced plant defense under low N mediated by Trichoderma involves NO, ROS, SA production as well as the induction of NRT and marker genes for systemic acquired resistance.One-sentence summaryTrichoderma enhances local and systemic acquired resistance under low nitrate nutrition

scholarly journals EFFECT OF DIFFERENT PLANT ACTIVATORS AGAINST RHIZOCTONIA SOLANI CAUSING ROOT ROT OF CHILLI

2018 ◽  
Vol 30 (1) ◽  
pp. 45
Author(s):  
Muhammad S. Baloch ◽  
Nasir A. Rajput ◽  
Muhammad Atiq ◽  
Abdul Rehman ◽  
Samiya M. Khan ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Citric Acid ◽  
Benzoic Acid ◽  
Rhizoctonia Solani ◽  
Root Rot ◽  
Systemic Acquired Resistance ◽  
Disease Incidence ◽  
Acquired Resistance ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate

Chilli is an important horticultural crop all over the world. Root rot of chilli is the most important disease caused by Rhizoctonia solani responsible for immense losses. Systemic acquired resistance (SAR) acting as a significant part in the proficiency of plants to protect themselves by means of hyper-sensitive reaction (HR) of plants toward the destructive pathogens. Additionally, SAR reveals as long time defense approach that may be weeks to months or sometimes throughout the entire season. The aim of this study was to induce systemic acquired resistance (SAR) against R. solani in chilli crop. Five plant activators salicylic acid, potassium dihydrogen phosphate (KH2PO4), di-potassium hydrogen phosphate (K2HPO4), benzoic acid and citric acid were evaluated under Lab. and field conditions with three different concentrations (1, 2 and 3%). Salicylic acid gave better result at 3% concentration. After 3rd application, salicylic acid at 21 days interval expressed minimum disease incidence as compared to others treatments. At concentration of 3 % after twenty-one days of spraying salicylic acid showed minimum disease incidence (9.667%) followed by KH2PO4 (16.433%), K2HPO4 (20.241%), benzoic acid (23.367%) and citric acid (28.667%) while control expressed maximum disease incidence (86.467%). So, it is concluded that salicylic acid gave better result than others treatments.

scholarly journals Altering Expression of Benzoic Acid/Salicylic Acid Carboxyl Methyltransferase 1 Compromises Systemic Acquired Resistance and PAMP-Triggered Immunity in Arabidopsis

2010 ◽  
Vol 23 (1) ◽  
pp. 82-90 ◽  
Author(s):  
Po-Pu Liu ◽  
Yue Yang ◽  
Eran Pichersky ◽  
Daniel F. Klessig
Keyword(s):  
Salicylic Acid ◽  
Benzoic Acid ◽  
Pseudomonas Syringae ◽  
Systemic Acquired Resistance ◽  
Transgenic Arabidopsis ◽  
Acquired Resistance ◽  
Pathogen Infection ◽  
Carboxyl Methyltransferase ◽  
Effector Triggered Immunity ◽  
Methyltransferase 1

Methyl salicylate (MeSA), which is synthesized in plants from salicylic acid (SA) by methyltransferases, has roles in defense against microbial and insect pests. Most of the MeSA that accumulates after pathogen attack is synthesized by benzoic acid/SA carboxyl methyltransferase 1 (AtBSMT1). To investigate the role of AtBSMT1 in plant defense, transgenic Arabidopsis with altered AtBSMT1 function or expression were assessed for their ability to resist pathogen infection. A knockout mutant (Atbsmt1) failed to accumulate MeSA following pathogen infection; these plants also failed to accumulate SA or its glucoside in the uninoculated leaves and did not develop systemic acquired resistance (SAR). However, the Atbsmt1 mutant exhibited normal levels of effector-triggered immunity and pathogen-associated molecular pattern (PAMP)-triggered immunity to Pseudomonas syringae and Hyaloperonospora arabidopsidis. Analyses of transgenic Arabidopsis plants overexpressing AtBSMT1 revealed that they accumulate elevated levels of MeSA in pathogen-infected leaves but fail to develop SAR. Since the levels of SA and its glucoside were reduced in uninoculated systemic leaves of these plants whereas MeSA levels were elevated, AtBSMT1-mediated conversion of SA to MeSA probably compromised SAR development by suppressing SA accumulation in uninoculated leaves. PAMP-triggered immunity also was compromised in the AtBSMT1 overexpressing plants, although effector-triggered immunity was not.

Role of Salicylic Acid and NIM1/NPR1 in Race-Specific Resistance in Arabidopsis

Genetics ◽  
2002 ◽  
Vol 161 (2) ◽  
pp. 803-811
Author(s):  
Gregory J Rairdan ◽  
Terrence P Delaney
Keyword(s):  
Salicylic Acid ◽  
Pseudomonas Syringae ◽  
Leucine Zipper ◽  
Systemic Acquired Resistance ◽  
Specific Resistance ◽  
Strong Dependence ◽  
Acquired Resistance ◽  
R Genes ◽  
Resistance Response

Abstract Salicylic acid (SA) and the NIM1/NPR1 protein have both been demonstrated to be required for systemic acquired resistance (SAR) and implicated in expression of race-specific resistance. In this work, we analyzed the role that each of these molecules play in the resistance response triggered by members of two subclasses of resistance (R) genes, members of which recognize unrelated pathogens. We tested the ability of TIR and coiled-coil-class (also known as leucine-zipper-class) R genes to confer resistance to Pseudomonas syringae pv. tomato or Peronospora parasitica in SA-depleted (NahG) and nim1/npr1 plants. We found that all of the P. syringae pv. tomato-specific R genes tested were dependent upon SA accumulation, while none showed strong dependence upon NIM1/NPR1 activity. A similar SA dependence was observed for the P. parasitica TIR and CC-class R genes RPP5 and RPP8, respectively. However, the P. parasitica-specific R genes differed in their requirement for NIM1/NPR1, with just RPP5 depending upon NIM1/NPR1 activity for effectiveness. These data are consistent with the hypothesis that at least in Arabidopsis, SA accumulation is necessary for the majority of R-gene-triggered resistance, while the role of NIM1/NPR in race-specific resistance is limited to resistance to P. parasitica mediated by TIR-class R genes.

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