Abstract
Understanding the regulation of plant responses to drought and low nitrogen (N) stresses is necessary to improve N use in water-limited lands, maintaining the sustainable and healthy development of ecosystems. In the present study, we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses. Both stresses resulted in lower net photosynthetic rates, chlorophyll content and total dry weight. Transcriptome analysis of fine roots identified 4642 genes that were differentially expressed in response to drought and/or low N stresses. Most ammonium transporters had high transcript abundances in response to drought and/or low N stress; meanwhile the ratio of ammonium to nitrate concentrations was increased under drought condition. Data of N uptakes and metabolism further supported that fine roots under drought stress increased ammonium uptake, and the aspartate-derived amino acid pathway might play a key role in tolerating drought stress in poplar roots. The large-scale dataset in this study presents a global view of the critical pathways involved in drought and low N stress. When linked with physiology and metabolomics data, these results provide new insights into the modulation of N uptake, metabolism and storage, and events within the N-related pathways for transportation, assimilation and amino acid metabolism.
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Claims 6
Claim · model-written summary
Drought and low nitrogen stresses both lowered net photosynthetic rate, chlorophyll content and total dry weight in Populus simonii.
- Taxon
- Populus simonii
Populus simoniie0 - Treatment
- drought and low N stressese0
- Outcome
- net photosynthetic rates, chlorophyll content and total dry weighte1
- Direction
- lowere1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses”
e1“Both stresses resulted in lower net photosynthetic rates, chlorophyll content and total dry weight”
Claim · model-written summary
Transcriptome analysis identified 4642 fine-root genes differentially expressed under drought and/or low N stress.
- Taxon
- Populus simoniiPopulus simoniie0
- Organ / stage
- fine rootse2
- Outcome
- genes that were differentially expressede2
- Value
- 4642e2
- Qualifier
- in response to drought and/or low N stressese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses”
e2“Transcriptome analysis of fine roots identified 4642 genes that were differentially expressed in response to drought and/or low N stresses”
Claim · model-written summary
Most ammonium transporters had high transcript abundance under drought and/or low N stress.
- Taxon
- Populus simoniiPopulus simoniie0
- Treatment
- drought and/or low N stresse3
- Gene
- ammonium transporterse3
- Outcome
- transcript abundancese3
- Qualifier
- highe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses”
e3“Most ammonium transporters had high transcript abundances in response to drought and/or low N stress”
Claim · model-written summary
The ratio of ammonium to nitrate concentrations increased under drought.
- Taxon
- Populus simoniiPopulus simoniie0
- Treatment
- drought conditione4
- Outcome
- ratio of ammonium to nitrate concentrationse4
- Direction
- increasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses”
e4“the ratio of ammonium to nitrate concentrations was increased under drought condition”
Claim · model-written summary
Fine roots under drought stress increased ammonium uptake.
- Taxon
- Populus simoniiPopulus simoniie0
- Organ / stage
- fine rootse5
- Treatment
- drought stresse5
- Outcome
- ammonium uptakee5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“we investigated morphological, physiological and transcriptome changes in Populus simonii Carr. root responding to long-term drought and low N stresses”
e5“fine roots under drought stress increased ammonium uptake”
Claim · model-written summary
The aspartate-derived amino acid pathway might play a key role in poplar tolerance to drought stress.
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the aspartate-derived amino acid pathway might play a key role in tolerating drought stress in poplar roots”
The same questions in other papers
drought · physiology: photosynthesis · Populus simoniiPositive and negative results
1 in the opposite direction
- positive
nitrogen · physiology: photosynthesis · Populus simoniiPositive and negative results
1 in the opposite direction
- positive
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.