Back to Search
Start Over
Chitosan signaling in guard cells requires endogenous salicylic acid
- Source :
- Bioscience, Biotechnology, and Biochemistry; August 2017, Vol. 81 Issue: 8 p1536-1541, 6p
- Publication Year :
- 2017
-
Abstract
- An elicitor chitosan (CHT) induces stomatal closure but the mechanism remains to be clarified. A phytohormone salicylic acid (SA) is crucial for elicitor-induced defense signaling in plants. Here we investigated whether endogenous SA is required for CHT signaling in guard cells. In the SA-deficient nahGmutant, treatment of CHT did not induce either apoplastic reactive oxygen species (ROS) production or stomatal closure but co-treatment of CHT and SA induced both apoplastic ROS production and stomatal closure, indicating the involvement of endogenous SA in CHT-induced apoplastic ROS production and CHT-induced stomatal closure. Furthermore, CHT induced transient cytosolic free calcium concentration increments in the nahGmutant in the presence of exogenous SA but not in the absence of exogenous SA. These results provide evidence that endogenous SA is a crucial element in CHT-induced stomatal closure.
Details
- Language :
- English
- ISSN :
- 09168451 and 13476947
- Volume :
- 81
- Issue :
- 8
- Database :
- Supplemental Index
- Journal :
- Bioscience, Biotechnology, and Biochemistry
- Publication Type :
- Periodical
- Accession number :
- ejs42701246
- Full Text :
- https://doi.org/10.1080/09168451.2017.1332979