Abstract
Exogenous polyamines applied to wheat roots increased both polyamine content and glycolate oxidase activity in leaves. -0.85 MPa osmotic stress not only increased the content of O-2(-) and H2O2, but also decreased glycolate oxidase activity in leaves, and 5 mM putrescine, 2 mM spermidine, and 1 mM spermine partly inhibited these effects. Exogenous oxalic acid decreased glycolate oxidase activity, increased O-2(-) content, and had no effect on H2O2 content. The correlation coefficient between glycolate oxidase activity and O-2(-) content was -0.89. These results suggest that exogenous polyamines inhibit O-2(-) accumulation under osmotic stress by enhancing glycolate oxidase activity. Exogenous polyamines also inhibit H2O2 accumulation in wheat seedlings under osmotic stress, but this does not correlate With the glycolate oxidase activity.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.