Abstract
To investigate the effect of arbuscular mycorrhizal fungi (AMF) inoculation and short-term cold exposer on Elymus nutans Griseb, 45 day old seedlings of two cultivars, Zhengdao (ZD) and Kangma (KM), were subjected to a 5 day cold treatment after inoculated with Glomus mosseae. The effects of AMF on the physiology of the two cultivars were determined, and we were especially interested in oxidative indexes under cold stress. Accumulation of reactive oxygen species (ROS), including superoxide and hydrogen peroxide, was very high in cold-stressed plants and caused lipid peroxidation in membranes, which measured as relative electrolyte leakage (REL), malondialdehyde (MDA) content. Less oxidative damage was detected in AMF colonized plants, which was associated with higher activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR). Mycorrhizal inoculum application promoted plant growth and enhanced the level of chlorophyll and antioxidant compounds such as glutathione and soluble sugars. We also measured the extent of mycorrhizal colonization. These protective mechanisms were found to be more efficient in temperature-tolerant KM than temperature-sensitive ZD. Overall, we suggest that AMF inoculation can improve plant resistance to cold stress in E. nuatans seedlings by directly scavenging ROS and by modulating redox balance and other defense mechanisms.
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Claims 7
Claim · model-written summary
Cold-stressed plants accumulated high reactive oxygen species and showed membrane lipid peroxidation.
- Taxon
- Elymus nutans GrisebCampeiostachys nutanst0
- Treatment
- cold-stressede0
- Outcome
- Accumulation of reactive oxygen species (ROS)e0
- Direction
- very highe0
Verbatim
e0“Accumulation of reactive oxygen species (ROS), including superoxide and hydrogen peroxide, was very high in cold-stressed plants and caused lipid peroxidation in membranes, which measured as relative electrolyte leakage (REL), malondialdehyde (MDA) content”
t0“Elymus nutans Griseb”
Claim · model-written summary
AMF-colonized plants had less oxidative damage.
- Taxon
- Elymus nutans GrisebCampeiostachys nutanst0
- Treatment
- AMF colonizede0
- Interactor
- AMFe0symbiont
- Outcome
- oxidative damagee0
- Direction
- Lesse0
Not reportedComparator
Verbatim
e0“Less oxidative damage was detected in AMF colonized plants”
t0“Elymus nutans Griseb”
Claim · model-written summary
Less oxidative damage in AMF-colonized plants was associated with higher antioxidant enzyme activities.
Verbatim
e0“Less oxidative damage was detected in AMF colonized plants, which was associated with higher activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX) and glutathione reductase (GR)”
t0“Elymus nutans Griseb”
Claim · model-written summary
Mycorrhizal inoculum promoted plant growth.
- Taxon
- Elymus nutans GrisebCampeiostachys nutanst0
- Treatment
- Mycorrhizal inoculum applicatione0
- Outcome
- plant growthe0
- Direction
- promotede0
Not reportedComparator
Verbatim
e0“Mycorrhizal inoculum application promoted plant growth”
t0“Elymus nutans Griseb”
Claim · model-written summary
Mycorrhizal inoculum enhanced chlorophyll and antioxidant compounds.
- Taxon
- Elymus nutans GrisebCampeiostachys nutanst0
- Outcome
- the level of chlorophyll and antioxidant compounds such as glutathione and soluble sugarse0
- Direction
- enhancede0
Not reportedTreatmentComparator
Verbatim
e0“enhanced the level of chlorophyll and antioxidant compounds such as glutathione and soluble sugars”
t0“Elymus nutans Griseb”
Claim · model-written summary
Protective mechanisms were more efficient in KM than ZD.
Verbatim
e0“These protective mechanisms were found to be more efficient in temperature-tolerant KM than temperature-sensitive ZD”
t0“Elymus nutans Griseb”
Claim · model-written summary
The authors suggest AMF inoculation can improve cold resistance through ROS scavenging and redox modulation.
Verbatim
e0“AMF inoculation can improve plant resistance to cold stress in E. nuatans seedlings by directly scavenging ROS and by modulating redox balance and other defense mechanisms”
t0“Elymus nutans Griseb”
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