Antioxidant defenses of mycorrhizal fungus infection against SO(2)-induced oxidative stress in Avena nuda seedlings.
Colonization of arbuscular mycorrhizal fungi Glomus mosseae increased Avena nuda seedling tolerance to SO(2) exposure, as indicated by elevated total plant biomass and ameliorative photosynthetic rate, when compared to the non-mycorrhizal plants. This is associated with an improved antioxidant capacity as shown by enhanced superoxide dismutase and catalase activity, increased ascorbic acid and glutathione content, and reduced malondialdehyde and hydrogen peroxide level in the mycorrhizal plants relative to the non-mycorrhizal plants under SO(2) exposure. The mycorrhizal fungi colonization had no effect on the stomatal conductance. To our knowledge, this is the first finding of this sort.
Huang
L L
LL
College of Chemistry and Life Sciences, Shenyang Normal University, Shenyang 110034, People's Republic of China.
Yang
C
C
Zhao
Y
Y
Xu
X
X
Xu
Q
Q
Li
G Z
GZ
Cao
J
J
Herbert
S J
SJ
Hao
L
L
D000975:Antioxidants / Q000378:metabolism*; D001205:Ascorbic Acid / Q000378:metabolism; D018554:Avena / Q000378:metabolism* / Q000382:microbiology; D018533:Biomass; D002374:Catalase / Q000378:metabolism; D005651:Fumigation; D005658:Fungi / Q000378:metabolism*; D005978:Glutathione / Q000378:metabolism; D008315:Malondialdehyde / Q000378:metabolism; D018384:Oxidative Stress / Q000187:drug effects* / Q000502:physiology*; D010788:Photosynthesis / Q000187:drug effects / Q000502:physiology; D010935:Plant Diseases / Q000382:microbiology*; D018517:Plant Roots / Q000254:growth & development; D054046:Plant Stomata / Q000187:drug effects / Q000378:metabolism; D036226:Seedlings / Q000378:metabolism; D013458:Sulfur Dioxide / Q000494:pharmacology*; D013482:Superoxide Dismutase / Q000378:metabolism
D000975:Antioxidants; D013458:Sulfur Dioxide; D008315:Malondialdehyde; D002374:Catalase; D013482:Superoxide Dismutase; D005978:Glutathione; D001205:Ascorbic Acid