Abstract
A transcriptome analysis of the Populus alba cambial region was performed with the aim of elucidating the gene network underlying the response to water deficit within the cambium and differentiating derivative cambial cells. Water stress was induced in 1-year-old P. alba plants by withholding water for 9 days. At that time, leaf predawn water potential fell to -0.8 MPa, resulting in a significant reduction in stomatal conductance, CO(2) assimilation and a consistent increment of stem shrinkage. These effects were almost fully reversed by re-hydration. The water deficit resulted in changes in gene expression that affected several functional categories, such as protein metabolism, cell wall metabolism, stress response, transporters and transcriptional regulation. The function of up- and down-regulated genes is discussed considering the physiological response of the plants to water deficit.
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Claims 5
Claim · model-written summary
Water withholding lowered predawn leaf water potential to -0.8 MPa.
- Taxon
- P. alba
Populus albae0 - Treatment
- withholding water for 9 dayse0
- Outcome
- leaf predawn water potentiale0
- Direction
- felle0
- Value
- -0.8 MPae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water stress was induced in 1-year-old P. alba plants by withholding water for 9 days. At that time, leaf predawn water potential fell to -0.8 MPa”
Claim · model-written summary
Water deficit significantly reduced stomatal conductance and CO2 assimilation.
- Taxon
- Populus albaPopulus albat0
- Outcome
- stomatal conductance, CO(2) assimilatione0
- Direction
- reductione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant reduction in stomatal conductance, CO(2) assimilation”
t0“Populus alba”
Claim · model-written summary
Water deficit increased stem shrinkage.
- Taxon
- Populus albaPopulus albat0
- Outcome
- stem shrinkagee0
- Direction
- incremente0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a consistent increment of stem shrinkage”
t0“Populus alba”
Claim · model-written summary
Rehydration almost fully reversed the physiological and stem effects.
- Taxon
- Populus albaPopulus albat0
- Treatment
- re-hydratione0
- Outcome
- These effectse0
- Direction
- almost fully reversede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These effects were almost fully reversed by re-hydration.”
t0“Populus alba”
Claim · model-written summary
Water deficit altered gene expression across several functional categories.
- Taxon
- Populus albaPopulus albat0
- Treatment
- water deficite0
- Outcome
- gene expressione0
- Direction
- changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water deficit resulted in changes in gene expression that affected several functional categories, such as protein metabolism, cell wall metabolism, stress response, transporters and transcriptional regulation.”
t0“Populus alba”