Abstract
Climate resilient crops are urgently needed to mitigate food insecurity arising from climate change and increased population. Enhancing plant stress memory is an efficient approach for improving crop resilience. We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.). Compared to non-primed plants, heat primed plants exhibited improved morphological traits, leaf photosynthetic capacity, water utilization efficiency and water potential at 45 °C. Primed plants displayed a transient enhancement in reactive oxygen species (ROS) production together with higher antioxidant enzyme activity, leading to improved ROS homeostasis and reduced oxidative damage during prolonged heat stress. Increased area of stomatal pores, and higher chloroplast ultrastructure stability, were observed in primed plants, compared to non-primed plants at 45 °C. A total of 2049 and 882 differentially expressed genes (DEGs) were specifically identified in primed vs non-primed plants 6- and 12-h post stress application, respectively. These were associated with RNA degradation, ubiquitin mediated proteolysis, mRNA surveillance, glycerophospholipid metabolism and phosphatidylinositol signaling. These physiological and molecular mechanisms likely contributed to tomato resilience during heat stress. Acquired thermotolerance in tomatoes could therefore be mediated by enhanced ROS homeostasis and stomatal regulation, as well as higher structural stability of chloroplasts. Our study sheds new light on the physiological and molecular mechanisms underlying heat stress memory in tomato and provides valuable integrative transcriptomic-phenotypic datasets for this process.
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Claims 13
Claim · model-written summary
Heat-primed tomato plants had improved morphological traits, leaf photosynthetic capacity and water utilization efficiency compared with non-primed plants.
- Taxon
- tomato
Solanum lycopersicume0 - Treatment
- heat primede1
- Outcome
- morphological traits, leaf photosynthetic capacity, water utilization efficiencye1
- Direction
- improvede1
- Comparator
- non-primed plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e1“Compared to non-primed plants, heat primed plants exhibited improved morphological traits, leaf photosynthetic capacity, water utilization efficiency and water potential at 45 °C”
Claim · model-written summary
Heat-primed tomato plants had improved water potential at 45 °C compared with non-primed plants.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- heat primede1
- Outcome
- water potentiale1
- Direction
- improvede1
- Qualifier
- at 45 °Ce1
- Comparator
- non-primed plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e1“Compared to non-primed plants, heat primed plants exhibited improved morphological traits, leaf photosynthetic capacity, water utilization efficiency and water potential at 45 °C”
Claim · model-written summary
Primed plants showed a transient enhancement in reactive oxygen species production.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Primed plantse2
- Outcome
- reactive oxygen species (ROS) productione2
- Direction
- enhancemente2
- Qualifier
- transiente2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e2“Primed plants displayed a transient enhancement in reactive oxygen species (ROS) production together with higher antioxidant enzyme activity, leading to improved ROS homeostasis and reduced oxidative damage during prolonged heat stress”
Claim · model-written summary
Primed plants had higher antioxidant enzyme activity.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Primed plantse2
- Outcome
- antioxidant enzyme activitye2
- Direction
- highere2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e2“Primed plants displayed a transient enhancement in reactive oxygen species (ROS) production together with higher antioxidant enzyme activity, leading to improved ROS homeostasis and reduced oxidative damage during prolonged heat stress”
Claim · model-written summary
Primed plants showed improved ROS homeostasis during prolonged heat stress.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Primed plantse2
- Outcome
- ROS homeostasise2
- Direction
- improvede2
- Qualifier
- during prolonged heat stresse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e2“Primed plants displayed a transient enhancement in reactive oxygen species (ROS) production together with higher antioxidant enzyme activity, leading to improved ROS homeostasis and reduced oxidative damage during prolonged heat stress”
Claim · model-written summary
Primed plants showed reduced oxidative damage during prolonged heat stress.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- Primed plantse2
- Outcome
- oxidative damagee2
- Direction
- reducede2
- Qualifier
- during prolonged heat stresse2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e2“Primed plants displayed a transient enhancement in reactive oxygen species (ROS) production together with higher antioxidant enzyme activity, leading to improved ROS homeostasis and reduced oxidative damage during prolonged heat stress”
Claim · model-written summary
Primed plants had an increased area of stomatal pores compared with non-primed plants at 45 °C.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- primed plantse3
- Outcome
- area of stomatal porese3
- Direction
- Increasede3
- Qualifier
- at 45 °Ce3
- Comparator
- non-primed plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e3“Increased area of stomatal pores, and higher chloroplast ultrastructure stability, were observed in primed plants, compared to non-primed plants at 45 °C”
Claim · model-written summary
Primed plants had higher chloroplast ultrastructure stability than non-primed plants at 45 °C.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- primed plantse3
- Outcome
- chloroplast ultrastructure stabilitye3
- Direction
- highere3
- Qualifier
- at 45 °Ce3
- Comparator
- non-primed plantse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e3“Increased area of stomatal pores, and higher chloroplast ultrastructure stability, were observed in primed plants, compared to non-primed plants at 45 °C”
Claim · model-written summary
A total of 2049 differentially expressed genes were identified in primed vs non-primed plants 6-h post stress.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- differentially expressed genes (DEGs)e4
- Value
- 2049e4
- Qualifier
- 6- and 12-h post stress applicatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e4“A total of 2049 and 882 differentially expressed genes (DEGs) were specifically identified in primed vs non-primed plants 6- and 12-h post stress application, respectively”
Claim · model-written summary
A total of 882 differentially expressed genes were identified in primed vs non-primed plants 12-h post stress.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- differentially expressed genes (DEGs)e4
- Value
- 882e4
- Qualifier
- 12-h post stress applicatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e4“A total of 2049 and 882 differentially expressed genes (DEGs) were specifically identified in primed vs non-primed plants 6- and 12-h post stress application, respectively”
Claim · model-written summary
The DEGs were associated with RNA degradation, ubiquitin mediated proteolysis and mRNA surveillance.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- RNA degradation, ubiquitin mediated proteolysis, mRNA surveillancee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e5“These were associated with RNA degradation, ubiquitin mediated proteolysis, mRNA surveillance, glycerophospholipid metabolism and phosphatidylinositol signaling”
Claim · model-written summary
The DEGs were associated with glycerophospholipid metabolism and phosphatidylinositol signaling.
- Taxon
- tomatoSolanum lycopersicume0
- Outcome
- glycerophospholipid metabolism and phosphatidylinositol signalinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We studied the underlying physiological and molecular mechanisms that accompany heat stress memory in tomato (Solanum lycopersicum L.)”
e5“These were associated with RNA degradation, ubiquitin mediated proteolysis, mRNA surveillance, glycerophospholipid metabolism and phosphatidylinositol signaling”
Claim · model-written summary
Acquired thermotolerance in tomato could be mediated by enhanced ROS homeostasis and stomatal regulation.
- Taxon
- tomatoesSolanum lycopersicume6
- Outcome
- Acquired thermotolerancee6
- Qualifier
- enhanced ROS homeostasis and stomatal regulatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Acquired thermotolerance in tomatoes could therefore be mediated by enhanced ROS homeostasis and stomatal regulation, as well as higher structural stability of chloroplasts”
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