Abstract
Black locust (Robinia pseudoacacia L.) is an important legume tree species that is widely used for revegetation in the arid and semi-arid areas of China, where it frequently encounters drought stress. This study investigated how the presence of AM fungi affected the photosynthesis and antioxidant gene-enzymes response of black locust seedlings to drought stress. Here, pot experiments were performed to investigate the effects of Rhizophagus irregularis (synonym for Glomus intraradices), an AM fungus, on the tissue water content, photosynthesis, reactive oxygen species (ROS) production, antioxidant enzyme activity and gene expression in black locust (Robinia pseudoacacia L.) seedlings which were subjected to well watered or moderate drought stress. Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes. Mycorrhizal plants had higher SOD, POD, CAT, APX, and GR activities, and the transcript levels of Cu/Zn-SOD, APX and GR, but lower O2, H2O2 and MDA concentrations in leaves and roots of black locust under drought and well watered conditions. Results from the present study indicate that AM fungus (R. irregularis) symbiosis can enhance photosynthesis and ROS scavenging capabilities and increase relative water content of leaves and roots to alleviate drought stress in black locust. Further research is needed to elucidate the relations among AM fungi and the metabolic pathways of antioxidant enzymes, and the function of antioxidant genes regulated by mycorrhizal symbiosis with the purpose of revealing the mechanisms of mycorrhiza-induced plant tolerance to drought stress.
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Claims 7
Claim · model-written summary
Mycorrhizal symbiosis increased the relative water content of black locust roots and leaves regardless of watering regime.
- Taxon
- Robinia pseudoacacia L.
Robinia pseudoacaciat0 - Treatment
- Mycorrhizal symbiosise1
- Interactor
- Rhizophagus irregularis
Rhizophagus irregularist1symbiont - Outcome
- relative water content of plant roots and leavese1
- Direction
- increasede1
- Qualifier
- regardless of watering regimese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
Claim · model-written summary
Mycorrhizal symbiosis promoted the accumulation of biomass and chlorophyll content of black locust regardless of watering regime.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Treatment
- Mycorrhizal symbiosise1
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Outcome
- biomass and chlorophyll (Chl) contente1
- Direction
- promotede1
- Qualifier
- regardless of watering regimese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
Claim · model-written summary
Mycorrhizal symbiosis improved the photochemistry efficiency of black locust regardless of watering regime.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Treatment
- Mycorrhizal symbiosise1
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Outcome
- photochemistry efficiencye1
- Direction
- improvede1
- Qualifier
- regardless of watering regimese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
Claim · model-written summary
Mycorrhizal black locust had higher SOD, POD and CAT activities.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Treatment
- Mycorrhizale2
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Outcome
- SOD, POD, CATe2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
e2“Mycorrhizal plants had higher SOD, POD, CAT, APX, and GR activities”
Claim · model-written summary
Mycorrhizal black locust had higher APX and GR activities.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Treatment
- Mycorrhizale2
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Outcome
- APX, and GRe2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e2“Mycorrhizal plants had higher SOD, POD, CAT, APX, and GR activities”
Claim · model-written summary
Mycorrhizal black locust had higher transcript levels of Cu/Zn-SOD, APX and GR.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Treatment
- Mycorrhizal symbiosise1
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Gene
- Cu/Zn-SOD, APX and GRe3
- Outcome
- transcript levels of Cu/Zn-SOD, APX and GRe3
- Direction
- higherinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
e3“the transcript levels of Cu/Zn-SOD, APX and GR”
Claim · model-written summary
Mycorrhizal black locust had lower O2, H2O2 and MDA concentrations in leaves and roots.
- Taxon
- Robinia pseudoacacia L.Robinia pseudoacaciat0
- Organ / stage
- leaves and rootse4
- Treatment
- Mycorrhizal symbiosise1
- Interactor
- Rhizophagus irregularisRhizophagus irregularist1symbiont
- Outcome
- O2, H2O2 and MDA concentrationse4
- Direction
- lowere4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Robinia pseudoacacia L.”
t1“Effects of Rhizophagus irregularis on Photosynthesis”
e1“Mycorrhizal symbiosis increased relative water content of plant roots and leaves, promoted the accumulation of biomass and chlorophyll (Chl) content, and improved photochemistry efficiency, regardless of watering regimes”
e4“lower O2, H2O2 and MDA concentrations in leaves and roots of black locust”
The same questions in other papers
mycorrhiza · Rhizophagus irregularis · Robinia pseudoacacia (black locust)Results agree
2 papers in the same direction as this paper
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.