Abstract
Improving the quality of tree planting material for carbon sequestration through reforestation can help solve environmental problems, including the need to reduce the concentration of carbon dioxide in the atmosphere. The purpose of this study was to investigate the possibility of using humic substances in combination with rhizosphere microorganisms Pseudomonas protegens DA1.2 and Pseudomonas sp. 4CH as a means to stimulate the growth of seedlings of pine, poplar, large-leaved linden, red oak, horse chestnut, and rowan. Humic substances stimulated the growth of shoots and roots of pine, large-leaved linden, and horse chestnut seedlings. The effects of bacteria depended on both plant and bacteria species: Pseudomonas protegens DA1.2 showed a higher stimulatory effect than Pseudomonas sp. 4CH on pine and linden, and Pseudomonas sp. 4CH was more effective in the case of chestnut. An additive effect of humates and Pseudomonas protegens DA1.2 on the growth rate of pine and linden saplings was discovered. Poplar, red oak, and rowan seedlings were unresponsive to the treatments. The growth-stimulating effects of the treatments are discussed in connection with the changes in carbon, chlorophyll, and nitrogen contents in plants. The results show the need for further research in bacterial species capable of stimulating the growth of plant species that were unresponsive in the present experiments.
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Claims 11
Claim · model-written summary
Humic substances stimulated shoot and root growth of pine seedlings
PinusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Humic substances stimulated the growth of shoots and roots of pine, large-leaved linden, and horse chestnut seedlings.”
Claim · model-written summary
Humic substances stimulated shoot and root growth of large-leaved linden seedlings
- Taxon
- large-leaved lindene1
- Treatment
- Humic substancese1
- Outcome
- growth of shoots and rootse1
- Direction
- stimulatede1
Not reportedComparator
Verbatim
e1“Humic substances stimulated the growth of shoots and roots of pine, large-leaved linden, and horse chestnut seedlings.”
Claim · model-written summary
Humic substances stimulated shoot and root growth of horse chestnut seedlings
- Taxon
- horse chestnute1
- Treatment
- Humic substancese1
- Outcome
- growth of shoots and rootse1
- Direction
- stimulatede1
Not reportedComparator
Verbatim
e1“Humic substances stimulated the growth of shoots and roots of pine, large-leaved linden, and horse chestnut seedlings.”
Claim · model-written summary
Pseudomonas protegens DA1.2 had a higher stimulatory effect than Pseudomonas sp. 4CH on pine
- Treatment
- Pseudomonas protegens DA1.2e2
- Interactor
- Pseudomonas protegens DA1.2Pseudomonas protegense2symbiont
- Second interactor
- Pseudomonas sp. 4CHe2symbiont
- Outcome
- stimulatory effecte2
- Direction
- highere2
- Comparator
- Pseudomonas sp. 4CHe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“The effects of bacteria depended on both plant and bacteria species: Pseudomonas protegens DA1.2 showed a higher stimulatory effect than Pseudomonas sp. 4CH on pine and linden, and Pseudomonas sp. 4CH was more effective in the case of chestnut”
Claim · model-written summary
Pseudomonas protegens DA1.2 had a higher stimulatory effect than Pseudomonas sp. 4CH on linden
Verbatim
e2“The effects of bacteria depended on both plant and bacteria species: Pseudomonas protegens DA1.2 showed a higher stimulatory effect than Pseudomonas sp. 4CH on pine and linden, and Pseudomonas sp. 4CH was more effective in the case of chestnut”
Claim · model-written summary
Pseudomonas sp. 4CH was more effective than the other treatment on horse chestnut
- Taxon
- horse chestnute1
- Treatment
- Pseudomonas sp. 4CHe2
- Interactor
- Pseudomonas sp. 4CHe2symbiont
- Outcome
- stimulatory effecte2
- Direction
- more effectivee2
Not reportedComparator
Verbatim
e1“Humic substances stimulated the growth of shoots and roots of pine, large-leaved linden, and horse chestnut seedlings.”
e2“The effects of bacteria depended on both plant and bacteria species: Pseudomonas protegens DA1.2 showed a higher stimulatory effect than Pseudomonas sp. 4CH on pine and linden, and Pseudomonas sp. 4CH was more effective in the case of chestnut”
Claim · model-written summary
An additive effect of humates and Pseudomonas protegens DA1.2 on growth rate of pine saplings
- Treatment
- humates and Pseudomonas protegens DA1.2e3
- Interactor
- Pseudomonas protegens DA1.2Pseudomonas protegense3symbiont
- Outcome
- growth ratee3
- Direction
- additive effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“An additive effect of humates and Pseudomonas protegens DA1.2 on the growth rate of pine and linden saplings was discovered”
Claim · model-written summary
An additive effect of humates and Pseudomonas protegens DA1.2 on growth rate of linden saplings
- Taxon
- lindene3
- Treatment
- humates and Pseudomonas protegens DA1.2e3
- Interactor
- Pseudomonas protegens DA1.2Pseudomonas protegense3symbiont
- Outcome
- growth ratee3
- Direction
- additive effecte3
Not reportedComparator
Verbatim
e3“An additive effect of humates and Pseudomonas protegens DA1.2 on the growth rate of pine and linden saplings was discovered”
Claim · model-written summary
Poplar seedlings were unresponsive to the treatments
PopulusNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Poplar, red oak, and rowan seedlings were unresponsive to the treatments”
Claim · model-written summary
Red oak seedlings were unresponsive to the treatments
- Taxon
- red oak
_(14092717698).jpg?width=60)
Quercus rubrae4 - Treatment
- the treatmentse4
- Outcome
- unresponsivee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_(14092717698).jpg?width=500)
Verbatim
e4“Poplar, red oak, and rowan seedlings were unresponsive to the treatments”
Claim · model-written summary
Rowan seedlings were unresponsive to the treatments
- Taxon
- rowan
Sorbus aucupariae4 - Treatment
- the treatmentse4
- Outcome
- unresponsivee4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Poplar, red oak, and rowan seedlings were unresponsive to the treatments”
The same questions in other papers
Pseudomonas protegens · growth · PinusResults agree
1 paper in the same direction as this paper
- positive
other · growth · PinusPositive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- no effect
3 papers more in this group
See all 7 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.