Abstract
Sensing of heat, high light (HL), or mechanical injury by a single leaf of a plant results in the activation of different systemic signals that reach systemic tissues within minutes and trigger systemic acquired acclimation (SAA) or systemic wound responses (SWRs), resulting in a heightened state of stress readiness of the entire plant. Among the different signals associated with rapid systemic responses to stress in plants are electric, calcium, and reactive oxygen species (ROS) waves. These signals propagate from the stressed or injured leaf to the rest of the plant through the plant vascular bundles, and trigger SWRs and SAA in systemic tissues. However, whether they can propagate through other cell types, and whether or not they are interlinked, remain open questions. Here we report that in response to wounding or heat stress (HS), but not HL stress, the ROS wave can propagate through mesophyll cells of Arabidopsis (Arabidopsis thaliana). Moreover, we show that ROS production by mesophyll cells during these stresses is sufficient to restore SWR and SAA transcript accumulation in systemic leaves, as well as SAA to HS (but not HL). We further show that propagation of the ROS wave through mesophyll cells could contribute to systemic signal integration during HL and HS stress combination. Our findings reveal that the ROS wave can propagate through tissues other than the vascular bundles of plants, and that different stresses can trigger different types of systemic signals that propagate through different cell layers and induce stress-specific systemic responses.
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Claims 7
Claim · model-written summary
Wounding triggered ROS wave propagation through Arabidopsis mesophyll cells.
- Taxon
- Arabidopsis
Arabidopsise0 - Organ / stage
- mesophyll cellse0
- Treatment
- woundinge0
- Outcome
- ROS wave can propagate through mesophyll cellse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to wounding or heat stress (HS), but not HL stress, the ROS wave can propagate through mesophyll cells of Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
Heat stress triggered ROS wave propagation through Arabidopsis mesophyll cells.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- mesophyll cellse0
- Treatment
- heat stress (HS)e0
- Outcome
- ROS wave can propagate through mesophyll cellse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in response to wounding or heat stress (HS), but not HL stress, the ROS wave can propagate through mesophyll cells of Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
High light stress did not trigger ROS wave propagation through mesophyll cells.
- Taxon
- ArabidopsisArabidopsise0
- Organ / stage
- mesophyll cellse0
- Treatment
- HL stresse0
- Outcome
- ROS wave can propagate through mesophyll cellse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not HL stress, the ROS wave can propagate through mesophyll cells of Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
ROS production in mesophyll cells restored systemic SWR and SAA transcript accumulation during the tested stresses.
- Taxon
- ArabidopsisArabidopsise1
- Organ / stage
- systemic leavese0
- Treatment
- ROS production by mesophyll cellse0
- Outcome
- SWR and SAA transcript accumulatione0
- Direction
- restoree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ROS production by mesophyll cells during these stresses is sufficient to restore SWR and SAA transcript accumulation in systemic leaves”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
Mesophyll ROS production restored systemic acclimation to heat stress.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- ROS production by mesophyll cellse0
- Outcome
- SAA to HSe0
- Direction
- restoree0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ROS production by mesophyll cells during these stresses is sufficient to restore SWR and SAA transcript accumulation in systemic leaves, as well as SAA to HS (but not HL)”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
Mesophyll ROS production did not restore systemic acclimation to high light.
- Taxon
- ArabidopsisArabidopsise2
- Treatment
- ROS production by mesophyll cellse1
- Outcome
- SAA to HS (but not HL)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SAA to HS (but not HL)”
e1“ROS production by mesophyll cells”
e2“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
ROS propagation through mesophyll cells could contribute to signal integration under combined high light and heat stress.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- HL and HS stress combinatione0
- Outcome
- systemic signal integratione0
- Qualifier
- propagation of the ROS wave through mesophyll cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“propagation of the ROS wave through mesophyll cells could contribute to systemic signal integration during HL and HS stress combination”
e1“Arabidopsis (Arabidopsis thaliana)”
The same questions in other papers
reactive oxygen species · molecular: expression · ArabidopsisPositive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- no effect
- negative
- positive
2 papers more in this group
See all 6 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.