Pre-treatment of salicylic acid enhances resistance of soybean seedlings to Fusarium solani

2019 ◽  
Vol 101 (3) ◽  
pp. 315-323 ◽  
Author(s):  
George Bawa ◽  
Lingyang Feng ◽  
Li Yan ◽  
Yongli Du ◽  
Jing Shang ◽  
...  
2014 ◽  
Vol 58 (1) ◽  
pp. 195-199 ◽  
Author(s):  
X. M. Li ◽  
L. J. Ma ◽  
N. Bu ◽  
Y. Y. Li ◽  
L. H. Zhang

2018 ◽  
Vol 10 (11) ◽  
pp. 44 ◽  
Author(s):  
George Bawa ◽  
Lingyang Feng ◽  
Yan Li ◽  
Jing Shang ◽  
Xiaoling Wu ◽  
...  

Sudden death syndrome (SDS) of soybean is a complex root rot disease caused by the semi-biotrophic fungus Fusarium solani (F. solani) and a leaf scorch disease; caused by toxins produced by pathogen in the roots. However, the mechanism of soybean resistant to F. solani is still poorly understood. Eighteen soybean cultivars were screened for SDS resistance, with one cultivar showing susceptibility and one cultivar showing resistance to F. solani infection. Histochemical analysis with diaminobenzidine (DAB) and Trypan blue staining indicated an accumulation of reactive oxygen species (ROS) and cell death in surrounding area of SDS which was higher in susceptible cultivar than in resistant cultivar. Furthermore, exogenous salicylic acid (SA) application also induced some level of resistance to F. solani by the susceptible cultivar. A biochemical study revealed that the activities of superoxide dismutase (SOD), peroxidase (POD), and enzymes involved in scavenging ROS, increased in susceptible cultivar after SDS infection. In addition, hydrogen peroxide (H2O2) and malondialdehyde (MDA) content also increased in the susceptible cultivar than in resistant cultivar. High-performance liquid chromatography (HPLC) analysis indicated that free and total salicylic acid (SA) content increased in the susceptible cultivar than in resistant cultivar. In addition, a real-time quantitative PCR analysis showed an accumulation of pathogen related (PR) genes in the resistant cultivar than in susceptible cultivar. Our results show that (i). F. solani infection can increase endogenous SA levels, antioxidase activities, ROS and cell death in susceptible soybean cultivar to induce resistance against Fusarium solani. (ii). F. solani infection induced the expression of SA marker genes in resistant soybean cultivar to enhance resistance.


2021 ◽  
Vol 13 (2) ◽  
pp. 10917
Author(s):  
Venu SREELAKSHMY ◽  
Gunasekar ANBARASI ◽  
Benaltraja VISHNUPRIYA

Agricultural crop production around the world is adversely affected by excess salt accumulation in the soil. Plants initiate broad range of signal transduction pathways to respond any stress. Salicylic acid (SA) is an endogenous plant growth regulator that acts as a signal molecule to modulate plant response by reducing the effects of abiotic stress on plants. The main objective of this study is to examine whether exogenous salicylic acid pre-treatment may reduce the adverse effects of salt stress and enhance salt tolerance in Solanum lycopersicum. For this experiment, two weeks old seedlings were subjected to salt stress by adding salt water (100 mM NaCl) for three days with or without salicylic acid pre-treatment. After salt stress exposure plant leaves were harvested and the various measures were recorded. Results of this study exhibited that salicylic acid pre-treatment mitigates various advers effects of salt stress on plant growth by stimulating plant biomass, water relations, protein content, chlorophyll pigment, and inorganic osmolytes accumulation. Simultaneously, an increase in activity of antioxidant enzymes of SOD, CAT and POX were also triggered.  This current study suggested that pre-treating of Solanum lycopersicum with salicylic acid attenuates the depressive effect of salinity by accelerating the osmolyte accumulation and triggering activity of free radical scavenging enzymes.


Author(s):  
O. Vasylyshyna ◽  

Currently, the problem of environmental pollution has become important, so the development of biodegradable films based on polysaccharide coatings, which could completely replace plastic is relevant. The purpose of research conducted with cherries of the varieties Alpha and Memory Artemenko, grown at the research station of pomology named after LP Simirenko IS NAAS − to establish the effect of treatment (100 mg/l) with a solution of salicylic acid; (1 %) chitosan with (100 mg/l) salicylic acid; (1 %) chitosan; on physical indicators: microstructure, density and weight loss of cherry fruits during storage at a temperature of 1 ± 0.5°C and relative humidity of 95±1 %. As a result of the conducted researches it was established that pre-treatment of cherry fruits with 100 mg/l with salicylic acid and 1 % chitosan affected the microstructure of mesocarp. The density of cherries of the varieties Alpha and Memory Artemenko, after storage decreased by 40.8 % and 45.2 %. In fruits treated with salicylic acid, the losses were 29.2 and 31.4 %, and 1 % solution of chitosan with salicylic acid −18,2 % and 12,6 %. Fruits pre-treated with a solution of salicylic acid have a lower weight loss of 3,5−3,4 %, and with the combined action of salicylic acid and chitosan – 2,7−3,0 %. The prospect of further research is to determine the physical changes of cherry fruits of different varieties by pre-treatment with a solution of salicylic acid and chitosan.


Author(s):  
Marin SOARE ◽  
Paula IANCU ◽  
Elena BONCIU ◽  
Ovidiu PĂNIȚĂ

The present paper analyses the effect of pre-treatment with salicylic acid (SA) on germination and the growth of winter wheat seedlings in water stress conditions induced by polyetylene glycol (PEG). A two-factor experiment was conducted in a completely randomized projection. The first factor (A) included three levels: a1- distilled water - control; a2 - 0.25 mM SA; a3 - 0.75 mM SA and the second factor (B) included three levels: b1- distilled water; b2 - 15% PEG and b3 - 25% PEG. Biological material was represented by a DH winter wheat line. It were made observations on germination percentage (GP), root length (RL), cotyledons length (CL), seedling fresh weight (SFW) and vigor index (VI). After the analysis of the obtained results it can appreciate that the 25% PEG concentration played the main role for the significant decrease of the germination percentage (GP) and vigor index (VI). Also, seeds pre-treatment with 0.75 mM SA could be a way to improve germination characteristics in drought conditions.


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