Abstract
Restoring forests in areas where they once stood is an important step towards increasing carbon sequestration. However, reforestation requires an increase in current levels of seedling production in the tree nurseries. The purpose of this work was to study the effectiveness of preparations based on bacteria and humic substances (HSs) to stimulate the growth of tree seedlings in a nursery. Two selected strains of Pseudomonas and humic substances were used to treat pine and poplar plants. The treatment of seedlings was carried out during their transplantation and after it, and the effects of treatment on shoot elongation, shoot and root mass were evaluated. Treatments with both bacterial strains enhanced the growth of poplar and pine shoots and roots, which was explained by their ability to synthesize auxins. P. protegens DA1.2 proved to be more effective than P. sp. 4CH. The treatment of plants with humic substances increased the nitrogen balance index and the content of chlorophyll in the leaves of poplar seedlings, which can elevate carbon storage due to the higher rate of photosynthesis. In addition, the combination of humic substances with P. protegens DA1.2 increased shoot biomass accumulation in newly transplanted pine plants, which indicates the possibility of using this combination in plant transplantation. The increase in length and weight of shoots and roots serves as an indicator of the improvement in the quality of planting material, which is necessary for successful reforestation to increase capture of carbon dioxide.
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Claims 5
Claim · model-written summary
Bacterial strains enhanced poplar shoot and root growth.
- Treatment
- both bacterial strainse0
- Outcome
- growth of poplar and pine shoots and rootse0
- Direction
- enhancede0
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with both bacterial strains enhanced the growth of poplar and pine shoots and roots”
Claim · model-written summary
Bacterial strains enhanced pine shoot and root growth.
- Treatment
- both bacterial strainse0
- Outcome
- growth of poplar and pine shoots and rootse0
- Direction
- enhancede0
PinusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with both bacterial strains enhanced the growth of poplar and pine shoots and roots”
Claim · model-written summary
P. protegens DA1.2 was more effective than P. sp. 4CH.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. protegens DA1.2 proved to be more effective than P. sp. 4CH”
e1“pine and poplar plants”
Claim · model-written summary
Humic substances increased poplar leaf nitrogen balance index and chlorophyll content.
- Organ / stage
- leavese0
- Treatment
- humic substancese0
- Outcome
- nitrogen balance index and the content of chlorophylle0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The treatment of plants with humic substances increased the nitrogen balance index and the content of chlorophyll in the leaves of poplar seedlings”
Claim · model-written summary
Humic substances combined with P. protegens DA1.2 increased shoot biomass in newly transplanted pine.
- Treatment
- combination of humic substances with P. protegens DA1.2e0
- Interactor
- P. protegens DA1.2Pseudomonas protegense0symbiont
- Outcome
- shoot biomass accumulatione0
- Direction
- increasede0
- Qualifier
- newly transplantede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the combination of humic substances with P. protegens DA1.2 increased shoot biomass accumulation in newly transplanted pine plants”
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