Abstract
Poplars (Populus spp.) are widely used in the pulp and paper industry and as bioenergy resources. Poplars require a large amount of water for biomass accumulation and lack of water is a limiting factor for poplar growth. Arbuscular mycorrhizal (AM) fungi have been previously reported to afford some plant species with greater resistance to drought stress. However, the effects of AM fungi on hybrid poplar under drought stress and recovery have not been studied. The main aim of this study was to evaluate the effects of the AM fungus, Rhizophagus irregularis, on the growth, water status, chlorophyll (Chl) content and fluorescence, and photosynthesis of poplar seedlings. The experiment was divided into three stages. At each stage of the experiment, the seedlings were subjected to a different watering regime: well-watered (prior stress), drought, and then rewatering (recovery). Measurements were taken at the end of each stage of the experiment. The results showed that mycorrhizal plants had a higher net photosynthetic rate and Chl fluorescence compared with nonmycorrhizal plants, regardless of the stage. Mycorrhizal and nonmycorrhizal plants showed different responses to drought stress: mycorrhizal plants showed better water-use efficiency and water uptake under drought stress conditions. In general, the poplar seedlings that formed the AM symbiosis with R. irregularis showed enhanced growth and reduced loss of biomass during the drought stress compared with the nonmycorrhizal seedlings.
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Claims 4
Claim · model-written summary
Mycorrhizal hybrid poplar seedlings had a higher net photosynthetic rate and chlorophyll fluorescence than nonmycorrhizal plants at every stage of the experiment.
- Treatment
- mycorrhizal plantse0
- Interactor
- Rhizophagus irregularis
Rhizophagus irregularise1symbiont - Outcome
- net photosynthetic rate and Chl fluorescencee0
- Direction
- highere0
- Comparator
- nonmycorrhizal plantse0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mycorrhizal plants had a higher net photosynthetic rate and Chl fluorescence compared with nonmycorrhizal plants, regardless of the stage”
e1“the AM fungus, Rhizophagus irregularis”
t0“hybrid poplar”
Claim · model-written summary
Under drought stress, mycorrhizal poplar plants showed better water-use efficiency and water uptake than nonmycorrhizal plants.
- Treatment
- mycorrhizal plantse0
- Interactor
- Rhizophagus irregularisRhizophagus irregularise1symbiont
- Outcome
- water-use efficiency and water uptakee0
- Direction
- bettere0
- Qualifier
- under drought stress conditionse0
- Comparator
- nonmycorrhizal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mycorrhizal and nonmycorrhizal plants showed different responses to drought stress: mycorrhizal plants showed better water-use efficiency and water uptake under drought stress conditions”
e1“the AM fungus, Rhizophagus irregularis”
t0“hybrid poplar”
Claim · model-written summary
Poplar seedlings forming AM symbiosis with R. irregularis showed enhanced growth compared with nonmycorrhizal seedlings during drought stress.
- Treatment
- the AM symbiosis with R. irregularise0
- Interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- growthe0
- Direction
- enhancede0
- Qualifier
- during the drought stresse0
- Comparator
- the nonmycorrhizal seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the poplar seedlings that formed the AM symbiosis with R. irregularis showed enhanced growth and reduced loss of biomass during the drought stress compared with the nonmycorrhizal seedlings”
Claim · model-written summary
Poplar seedlings forming AM symbiosis with R. irregularis had reduced loss of biomass compared with nonmycorrhizal seedlings during drought stress.
- Treatment
- the AM symbiosis with R. irregularise0
- Interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- loss of biomasse0
- Direction
- reducede0
- Qualifier
- during the drought stresse0
- Comparator
- the nonmycorrhizal seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the poplar seedlings that formed the AM symbiosis with R. irregularis showed enhanced growth and reduced loss of biomass during the drought stress compared with the nonmycorrhizal seedlings”
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See all 13 papers →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.