Enhanced resistance to viruses in Nicotiana edwardsonii var. Columbia is dependent on salicylic acid, correlates with high glutathione levels and extends to plant-pathogenic bacteria and abiotic stress
Our earlier research showed that an interspecific tobacco hybrid (Nicotiana edwardsonii var. Columbia, NEC) displays elevated levels of salicylic acid (SA) and enhanced resistance to localized necrotic symptoms (hypersensitive response, HR) caused by tobacco mosaic virus (TMV) and tobacco necrosis v...
Elmentve itt :
| Szerzők: | |
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| Dokumentumtípus: | Cikk |
| Megjelent: |
2024
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| Sorozat: | MOLECULAR PLANT-MICROBE INTERACTIONS
37 No. 1 |
| Tárgyszavak: | |
| doi: | 10.1094/MPMI-07-23-0106-R |
| mtmt: | 34415003 |
| Online Access: | http://publicatio.bibl.u-szeged.hu/39834 |
| Tartalmi kivonat: | Our earlier research showed that an interspecific tobacco hybrid (Nicotiana edwardsonii var. Columbia, NEC) displays elevated levels of salicylic acid (SA) and enhanced resistance to localized necrotic symptoms (hypersensitive response, HR) caused by tobacco mosaic virus (TMV) and tobacco necrosis virus (TNV), as compared to another interspecific hybrid (Nicotiana edwardsonii, NE) derived from the same parents. In the present study, we investigated whether symptomatic resistance in NEC is indeed associated with the inhibition of TMV and TNV and whether SA plays a role in this process. We demonstrated that enhanced virus resistance in NEC is manifested as both milder local necrotic (HR) symptoms and reduced levels of TMV and TNV. The presence of an adequate amount of SA contributes to the enhanced defense response of NEC to TMV and TNV, since the absence of SA resulted in seriously impaired virus resistance. Elevated levels of subcellular GSH in NEC plants in response to viral infection suggest that in addition to SA, GSH may also contribute to the elevated virus resistance of NEC. Furthermore, we found that NEC displays an enhanced resistance not only to viral pathogens but also to bacterial infections and abiotic oxidative stress induced by paraquat treatments. |
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| Terjedelem/Fizikai jellemzők: | 15 36-50 |
| ISSN: | 0894-0282 |