Bibliographic Details
| Title: |
A novel xylanase from a myxobacterium triggers a plant immune response in Nicotiana benthamiana. |
| Authors: |
Zhao, Yuqiang1,2 (AUTHOR), Yang, Kun3 (AUTHOR), Wang, Yanxin2,4 (AUTHOR), Li, Xu2 (AUTHOR), Xia, Chengyao2 (AUTHOR), Huang, Yan2 (AUTHOR), Li, Zhoukun2 (AUTHOR), Zhu, Cancan1 (AUTHOR), Cui, Zhongli2 (AUTHOR), Ye, Xianfeng2 (AUTHOR) yxf@njau.edu.cn |
| Source: |
Molecular Plant Pathology. Jun2024, Vol. 25 Issue 6, p1-14. 14p. |
| Subject Terms: |
*NICOTIANA benthamiana, *CELL receptors, *GLYCOSIDASES, *XYLANASES, *IMMUNE response, *PHYTOPATHOGENIC fungi |
| Abstract: |
Xylanases derived from fungi, including phytopathogenic and nonpathogenic fungi, are commonly known to trigger plant immune responses. However, there is limited research on the ability of bacterial‐derived xylanases to trigger plant immunity. Here, a novel xylanase named CcXyn was identified from the myxobacterium Cystobacter sp. 0969, which displays broad‐spectrum activity against both phytopathogenic fungi and bacteria. CcXyn belongs to the glycoside hydrolases (GH) 11 family and shares a sequence identity of approximately 32.0%–45.0% with fungal xylanases known to trigger plant immune responses. Treatment of Nicotiana benthamiana with purified CcXyn resulted in the induction of hypersensitive response (HR) and defence responses, such as the production of reactive oxygen species (ROS) and upregulation of defence gene expression, ultimately enhancing the resistance of N. benthamiana to Phytophthora nicotianae. These findings indicated that CcXyn functions as a microbe‐associated molecular pattern (MAMP) elicitor for plant immune responses, independent of its enzymatic activity. Similar to fungal xylanases, CcXyn was recognized by the NbRXEGL1 receptor on the cell membrane of N. benthamiana. Downstream signalling was shown to be independent of the BAK1 and SOBIR1 co‐receptors, indicating the involvement of other co‐receptors in signal transduction following CcXyn recognition in N. benthamiana. Moreover, xylanases from other myxobacteria also demonstrated the capacity to trigger plant immune responses in N. benthamiana, indicating that xylanases in myxobacteria are ubiquitous in triggering plant immune functions. This study expands the understanding of xylanases with plant immune response‐inducing properties and provides a theoretical basis for potential applications of myxobacteria in biocontrol strategies against phytopathogens. [ABSTRACT FROM AUTHOR] |
|
Copyright of Molecular Plant Pathology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
|
Full text is not displayed to guests. |
Login for full access.
|
