Abstract
Understanding drought resistance mechanisms is crucial for breeding poplar species suited to arid and semiarid regions. This study explored the drought responses of three newly developed 'Zhongxiong' series poplars using integrated transcriptomic and physiological analyses. Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation. Additionally, drought stress triggered oxidative damage through increased reactive oxygen species production, leading to malondialdehyde accumulation. Weighted gene co-expression network analysis revealed that differentially expressed genes closely associated with physiological responses were enriched in cell redox homeostasis pathways, specifically the thioredoxin-peroxiredoxin pathway. Key genes in this pathway and in cyclic electron flow, such as PGR5-L1A, were downregulated, suggesting compromised reactive oxygen species scavenging and photoprotection under drought stress. Notably, ZX4 poplar exhibited higher drought tolerance, maintaining stronger activity in cyclic electron flow and the thioredoxin-peroxiredoxin pathway compared with ZX3 and ZX5. Genes like PGR5-L1A, 2-Cys Prx BAS1, PrxQ and TPX are promising candidates for enhancing drought resistance in poplars through genetic improvement, with potential applications for developing resilient forestry varieties.
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Claims 9
Claim · model-written summary
Drought stress changed the expression of differentially expressed genes linked to photosynthesis-related pathways in poplar leaves.
- Treatment
- drought stresse1
- Outcome
- differentially expressed genes linked to photosynthesis-related pathwayse1
- Direction
- changese1
PopulusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
Claim · model-written summary
Drought stress impaired photosynthetic function and carbon assimilation in poplar, as indicated by the gene expression changes.
- Treatment
- drought stresse1
- Outcome
- photosynthetic function and carbon assimilatione1
- Direction
- impairede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
Claim · model-written summary
Drought stress increased reactive oxygen species production in poplar leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
e2“drought stress triggered oxidative damage through increased reactive oxygen species production, leading to malondialdehyde accumulation”
Claim · model-written summary
Drought stress led to malondialdehyde accumulation in poplar leaves.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
e2“drought stress triggered oxidative damage through increased reactive oxygen species production, leading to malondialdehyde accumulation”
Claim · model-written summary
Differentially expressed genes closely associated with physiological responses were enriched in cell redox homeostasis pathways, including the thioredoxin-peroxiredoxin pathway, in poplar.
- Outcome
- cell redox homeostasis pathwayse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
e3“differentially expressed genes closely associated with physiological responses were enriched in cell redox homeostasis pathways, specifically the thioredoxin-peroxiredoxin pathway”
Claim · model-written summary
Under drought stress, key genes in the thioredoxin-peroxiredoxin pathway and cyclic electron flow, such as PGR5-L1A, were downregulated in poplar.
- Treatment
- drought stresse4
- Gene
- PGR5-L1Ae4
- Outcome
- Key genes in this pathway and in cyclic electron flowe4
- Direction
- downregulatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under drought stress, poplar leaves showed significant changes in differentially expressed genes linked to photosynthesis-related pathways, including photosynthesis-antenna proteins and carbon fixation, indicating impaired photosynthetic function and carbon assimilation”
e4“Key genes in this pathway and in cyclic electron flow, such as PGR5-L1A, were downregulated, suggesting compromised reactive oxygen species scavenging and photoprotection under drought stress”
Claim · model-written summary
The ZX4 poplar showed higher drought tolerance than ZX3 and ZX5.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“ZX4 poplar exhibited higher drought tolerance, maintaining stronger activity in cyclic electron flow and the thioredoxin-peroxiredoxin pathway compared with ZX3 and ZX5”
Claim · model-written summary
The ZX4 poplar maintained stronger activity in cyclic electron flow and the thioredoxin-peroxiredoxin pathway than ZX3 and ZX5.
- Material
- ZX4e5
- Outcome
- activity in cyclic electron flow and the thioredoxin-peroxiredoxin pathwaye5
- Direction
- strongere5
- Comparator
- ZX3 and ZX5e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“ZX4 poplar exhibited higher drought tolerance, maintaining stronger activity in cyclic electron flow and the thioredoxin-peroxiredoxin pathway compared with ZX3 and ZX5”
Claim · model-written summary
PGR5-L1A, 2-Cys Prx BAS1, PrxQ and TPX are proposed as promising candidates for enhancing drought resistance in poplars through genetic improvement.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Genes like PGR5-L1A, 2-Cys Prx BAS1, PrxQ and TPX are promising candidates for enhancing drought resistance in poplars through genetic improvement”
The same questions in other papers
drought · physiology: oxidative · Populus (poplar)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- no effect
drought · physiology: photosynthesis · Populus (poplar)Positive and negative results
8 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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See all 10 papers →drought · molecular: expression · Populus (poplar)Positive and negative results
3 papers in the same direction as this paper · 7 in the opposite direction
- positive
- positive
- positive
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See all 11 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.