ISSN:
1399-3054
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
The isoenzymatic pattern of Superoxide dismutase (SOD; EC 1.15.1.1) was studied in the symbiosis of Glomus mosseae (Nicol. and Gerd.) Gerd. and Trappe-Trifolium prarense L A Cu.Zn-SOD (M, 40500) was found in spores of G. mosseae. while one Mn-SOD (Mn-SOD I) and two Cu.Zn-SODs (Cu.Zn-SOD 1 and Cu.Zn-SOD II) were present in both roots and leaves of T. pratense. Molecular masses for Cu.Zn-SOD I and Cu.Zn-SOD II were 31000 and 34300. respectively. However, when T. prateme and G. mosseae were associated, mycorrhizal roots showed two new iso-zymes, Mn-SOD II and mycCu.Zn-SOD, which have relative molecular masses of 37 800 and 33 300, respectively. The mycCu.Zn-SOD was found to be specific for this association, whereas Mn-SOD II was also present in nodules of Rhizobium-T. pra-tense. Results suggest that both enzymes are induced in the T. praiense roots in response to invasion by mycorrhizal fungi, perhaps as a result of an increase in the generation of O-2 radicals in plant roots.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1399-3054.1993.tb08793.x
