Parthenolide accumulation and expression of genes related to parthenolide biosynthesis affected by exogenous application of methyl jasmonate and salicylic acid in Tanacetum parthenium

2015 ◽  
Vol 34 (11) ◽  
pp. 1909-1918 ◽  
Author(s):  
Mohammad Majdi ◽  
Mohammad Reza Abdollahi ◽  
Asad Maroufi
Keyword(s):  
Salicylic Acid ◽  
Methyl Jasmonate ◽  
Exogenous Application ◽  
Tanacetum Parthenium ◽  
Expression Of Genes

scholarly journals Exogenous Application of Methyl Jasmonate and Salicylic Acid Mitigates Drought-Induced Oxidative Damages in French Bean (Phaseolus vulgaris L.)

Plants ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 2066
Author(s):  
Mohammed Mohi-Ud-Din ◽  
Dipa Talukder ◽  
Motiar Rohman ◽  
Jalal Uddin Ahmed ◽  
S. V. Krishna Jagadish ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Methyl Jasmonate ◽  
Antioxidant Defense ◽  
Foliar Application ◽  
Antioxidant Defense System ◽  
French Bean ◽  
Defense System ◽  
Growth Physiology ◽  
Exogenous Application ◽  
Combined Application

Drought stress impairs the normal growth and development of plants through various mechanisms including the induction of cellular oxidative stresses. The aim of this study was to evaluate the effect of the exogenous application of methyl jasmonate (MeJA) and salicylic acid (SA) on the growth, physiology, and antioxidant defense system of drought-stressed French bean plants. Application of MeJA (20 μM) or SA (2 mM) alone caused modest reductions in the harmful effects of drought. However, combined application substantially enhanced drought tolerance by improving the physiological activities and antioxidant defense system. The drought-induced generation of O2●− and H2O2, the MDA content, and the LOX activity were significantly lower in leaves when seeds or leaves were pre-treated with a combination of MeJA (10 μM) and SA (1 mM) than with either hormone alone. The combined application of MeJA and SA to drought-stressed plants also significantly increased the activities of the major antioxidant enzymes superoxide dismutase, catalase, peroxidase, glutathione peroxidase, and glutathione-S-transferase as well as the enzymes of the ascorbate–glutathione cycle. Taken together, our results suggest that seed or foliar application of a combination of MeJA and SA restore growth and normal physiological processes by triggering the antioxidant defense system in drought-stressed plants.

Exogenous application of methyl jasmonate induces defence against Meloidogyne hapla in soybean

Nematology ◽  
2017 ◽  
Vol 19 (3) ◽  
pp. 293-304 ◽  
Author(s):  
Yanfeng Hu ◽  
Jia You ◽  
Chunjie Li ◽  
Cui Hua ◽  
Congli Wang
Keyword(s):  
Methyl Jasmonate ◽  
Plant Defence ◽  
Pcr Analysis ◽  
Parasitic Nematodes ◽  
Meloidogyne Hapla ◽  
Exogenous Application ◽  
Expression Of Genes ◽  
Pathogenesis Related ◽  
Pathogenesis Related Gene ◽  
Soybean Resistance

Phytohormones play important roles in plant defence against plant-parasitic nematodes, although the role of jasmonate (JA) in defence against root-knot nematodes (RKN, Meloidogyne spp.) in soybean (Glycine max) was unknown. In this study, two commercial soybean cultivars, cvs DongSheng1 (DS1) and SuiNong14 (SN14), were identified as susceptible and resistant, respectively, to M. hapla. Quantitative reverse transcription (qRT)-PCR analysis showed that the expression of genes involved in JA synthesis or signalling was significantly induced in both susceptible and resistant roots at 24 and 48 h after inoculation. Exogenous application of methyl jasmonate induced defence against RKN in susceptible cv. DS1, which might be involved in altered activities of defence-related enzymes (chitinase and β-1,3 glucanase) and pathogenesis-related gene PR5 expression. The results indicate that exogenous application of JA might be an alternative strategy to induce soybean resistance against RKN.

scholarly journals Restoration of Defective Cross Talk in ssi2 Mutants: Role of Salicylic Acid, Jasmonic Acid, and Fatty Acids in SSI2-Mediated Signaling

2003 ◽  
Vol 16 (11) ◽  
pp. 1022-1029 ◽  
Author(s):  
Pradeep Kachroo ◽  
Aardra Kachroo ◽  
Ludmila Lapchyk ◽  
David Hildebrand ◽  
Daniel F. Klessig
Keyword(s):  
Cell Death ◽  
Salicylic Acid ◽  
Jasmonic Acid ◽  
Cross Talk ◽  
Pr Genes ◽  
Exogenous Application ◽  
Basal Level Expression ◽  
Sa Signaling ◽  
Spontaneous Cell Death

The Arabidopsis mutants ssi2 and fab2 are defective in stearoyl ACP desaturase, which causes altered salicylic acid (SA)- and jasmonic acid (JA)-mediated defense signaling. Both ssi2 and fab2 plants show spontaneous cell death, express PR genes constitutively, accumulate high levels of SA, and exhibit enhanced resistance to bacterial and oomycete pathogens. In contrast to constitutive activation of the SA pathway, ssi2 and fab2 plants are repressed in JA-mediated induction of the PDF1.2 gene, which suggests that the SSI2-mediated signaling pathway modulates cross talk between the SA and JA pathways. In this study, we have characterized two recessive nonallelic mutants in the ssi2 background, designated as rdc (restorer of defective cross talk) 2 and rdc8. Both ssi2 rdc mutants are suppressed in constitutive SA signaling, show basal level expression of PR-1 gene, and induce high levels of PDF1.2 in response to exogenous application of JA. Interestingly, while the rdc8 mutation completely abolishes spontaneous cell death in ssi2 rdc8 plants, the ssi2 rdc2 plants continue to show some albeit reduced cell death. Fatty acid (FA) analysis showed a reduction in 16:3 levels in ssi2 rdc8 plants, which suggests that this mutation may limit the flux of FAs into the pro-karyotic pathway of glycerolipid biosynthesis. Both rdc2 and rdc8 continue to accumulate high levels of 18:0, which suggests that 18:0 levels were responsible for neither constitutive SA signaling nor repression of JA-induced expression of the PDF1.2 gene in ssi2 plants. We also analyzed SA and JA responses of the fab2-derived shs1 mutant, which accumulates levels of 18:0 over 50% lower than those in the fab2 plants. Even though fab2 shs1 plants were morphologically bigger than fab2 plants, they expressed PR genes constitutively, showed HR-like cell death, and accumulated elevated levels of SA. However, unlike the ssi2 rdc plants, fab2 shs1 plants were unable to induce high levels of PDF1.2 expression in response to exogenous application of JA. Together, these results show that defective cross talk in ssi2 can be restored by second site mutations and is independent of morphological size of the plants, cell death, and elevated levels of 18:0.

Exogenous application of methyl jasmonate induces defense response and develops tolerance against mungbean yellow mosaic India virus in Vigna mungo

2019 ◽  
Vol 46 (1) ◽  
pp. 69 ◽  
Author(s):  
Nibedita Chakraborty ◽  
Jolly Basak
Keyword(s):  
Methyl Jasmonate ◽  
Molecular Mechanisms ◽  
Stability Index ◽  
Protective Role ◽  
Membrane Stability ◽  
Vigna Mungo ◽  
Marker Genes ◽  
Exogenous Application ◽  
Ros Homeostasis

Vigna mungo (L.)Hepper is an economically important leguminous crop in south-east Asia. However, its production is severely affected by Mungbean yellow mosaic India virus (MYMIV). It is well established that methyl jasmonate (MeJA) is effective in inducing resistance against pathogens in several plants. To assess the role of MeJA in developing MYMIV tolerance in V. mungo, we analysed time-dependent biochemical and molecular responses of MYMIV susceptible V. mungo after exogenous application of different MeJA concentrations, followed by MYMIV infection. Our analysis revealed that exogenous application of different concentrations of MeJA resulted in decreased levels of malondialdehyde with higher membrane stability index values in MYMIV susceptible V. mungo, suggesting the protective role of MeJA through restoring the membrane stability. Moreover, the level of expression of different antioxidative enzymes revealed that exogenous MeJA is also very effective in ROS homeostasis maintenance. Enhanced expressions of the defence marker genes lipoxygenase and phenylalanine ammonia-lyase and the reduced expression of the MYMIV coat-protein encoding gene in all MeJA treated plants post MYMIV infection revealed that exogenous application of MeJA is effective for MYMIV tolerance in V. mungo. Our findings provide new insights into the physiological and molecular mechanisms of MYMIV tolerance in Vigna induced by MeJA.

Exogenous Application of Salicylic Acid and Glycine Betaine as Tools to Enhance Biomass and Tolerance of Potato Cultivars

2018 ◽  
Vol 71 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Mouhamad Alhoshan ◽  
Morteza Zahedi ◽  
Ali Akbar Ramin ◽  
Mohammad R. Sabzalian
Keyword(s):  
Salicylic Acid ◽  
Glycine Betaine ◽  
Potato Cultivars ◽  
Exogenous Application
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