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| Content Provider | Springer Nature Link |
|---|---|
| Author | Sorahibar, Mona Niknam, Vahid Ebrahimzadeh, Hassan Soltanloo, Hassan Behmanesh, Mehrdad Enferadi, Sattar Tahmasebi |
| Copyright Year | 2015 |
| Abstract | Head blight caused by Fusarium graminearum (F. graminearum) is one of the major threats to wheat and barley around the world. The importance of this disease is due to a reduction in both grain yield and quality in infected plants. Currently, there is limited knowledge about the physiological mechanisms involved in plant resistance against this pathogen. To reveal the physiological mechanisms underlying the resistance to F. graminearum, spikes of resistant (Sumai3) and susceptible (Falat) wheat cultivars were analyzed 4 days after inoculation, as the first symptoms of pathogen infection appeared. F. graminearum inoculation resulted in a greater induction level and activity of salicylic acid (SA), callose, phenolic compounds, peroxidase, phenylalanine ammonia lyase (PAL), and polyphenol oxidase in resistant versus susceptible cultivars. Soil drench application to spikes of SA, 24 h before inoculation with F. graminearum alleviated Fusarium head blight symptoms in both resistant and susceptible cultivars. SA treated plants showed a significant increment in hydrogen peroxide (H2O2) production, lipid peroxidation, SA, and callose content. SA-induced H2O2 level seems to be related to increased superoxide dismutase and decreased catalase activities. In addition, real-time quantitative PCR analysis showed that SA pretreatment induced expression of PAL genes in both infected and non-infected head tissues of the susceptible and resistant cultivars. Our data showed that soil drench application of SA activates antioxidant defense responses and may subsequently induce systemic acquired resistance, which may contribute to the resistance against F. graminearum. These results provide novel insights about the physiological and molecular role of SA in plant resistance against hemi-biotrophic pathogen infection. |
| Starting Page | 477 |
| Ending Page | 491 |
| Page Count | 15 |
| File Format | |
| ISSN | 07217595 |
| Journal | Journal of Plant Growth Regulation |
| Volume Number | 35 |
| Issue Number | 2 |
| e-ISSN | 14358107 |
| Language | English |
| Publisher | Springer US |
| Publisher Date | 2015-11-06 |
| Publisher Place | New York |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Fusarium graminearum Fusarium head blight Resistance Salicylic acid Systemic acquired resistance Wheat Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Agronomy and Crop Science |
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