We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Contribution of both lignin content and sinapyl monomer to disease resistance in tobacco.
- Authors
Ma, Q.‐h.; Zhu, H.‐h.; Qiao, M.‐y.
- Abstract
As a major component of the cell wall, lignin has been suggested to play an important role in the plant defence response to various pathogens. However, how lignin is involved in plant pathogen interaction is still unclear. Here, a series of transgenic tobacco lines were cultivated with a range of differences in lignin content and composition. Evaluation of pathogen resistance in these plants indicated that lower total lignin content aggravated the severity of tobacco black shank and bacterial wilt diseases, while increased sinapyl lignin (S) alleviated the disease symptoms. The regression analysis indicated both lignin content and S lignin were positively correlated with disease resistance. These two factors had additive effects, exhibiting stronger correlation with disease resistance when they were combined. Neither guaiacyl lignin (G) nor S/G ratio showed close correlation with disease resistance. The expression of pathogenesis‐related protein genes <italic>PR2</italic> and <italic>PR3</italic> was induced after pathogen inoculation. However, the up‐regulation of <italic>PR2</italic> and <italic>PR3</italic> was not associated with a disease resistance‐induced increase in lignin content. These data collectively suggest that both total lignin content and S lignin are main factors that contribute to the basic defence response in tobacco.
- Subjects
DISEASE resistance of plants; LIGNINS; TOBACCO disease &; pest resistance; PHYTOPHTHORA nicotianae; RALSTONIA solanacearum
- Publication
Plant Pathology, 2018, Vol 67, Issue 3, p642
- ISSN
0032-0862
- Publication type
Article
- DOI
10.1111/ppa.12767