Abstract
Abstract Crosstalk between phytohormone pathways is essential in plant growth, development and stress responses. Brassinosteroids (BRs) and ethylene are both pivotal plant growth regulators, and the interaction between these two phytohormones in the tomato response to salt stress is still unclear. Here, we explored the mechanism by which BRs affect ethylene biosynthesis and signaling in tomato seedlings under salt stress. The activity of 1-aminocyclopropane-1-carboxylate synthase (ACS), an ethylene synthesis enzyme, and the ethylene signaling pathway were activated in plants pretreated with BRs. Scavenging of ethylene production or silencing of ethylene signaling components inhibited BR-induced salt tolerance and blocked BR-induced activities of several antioxidant enzymes. Previous studies have reported that BRs can induce plant tolerance to a variety of environmental stimuli by triggering the generation of H 2 O 2 as a signaling molecule. We also found that H 2 O 2 might be involved in the crosstalk between BRs and ethylene in the tomato response to salt stress. Simultaneously, BR-induced ethylene production was partially blocked by pretreated with a reactive oxygen species scavenger or synthesis inhibitor. These results strongly demonstrated that ethylene and H 2 O 2 play important roles in BR-dependent induction of plant salt stress tolerance. Furthermore, we also investigated the relationship between BR signaling and ethylene signaling pathways in plant processes responding to salt stress.
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Claims 7
Claim · model-written summary
Brassinosteroid pretreatment activated ACS activity in tomato under salt stress.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- plants pretreated with BRse1
- Gene
- 1-aminocyclopropane-1-carboxylate synthase (ACS)e1
- Outcome
- activity of 1-aminocyclopropane-1-carboxylate synthase (ACS)e1
- Direction
- were activatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e1“The activity of 1-aminocyclopropane-1-carboxylate synthase (ACS), an ethylene synthesis enzyme, and the ethylene signaling pathway were activated in plants pretreated with BRs”
Claim · model-written summary
Brassinosteroid pretreatment activated the ethylene signaling pathway in tomato under salt stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- plants pretreated with BRse1
- Outcome
- the ethylene signaling pathwaye1
- Direction
- were activatede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e1“The activity of 1-aminocyclopropane-1-carboxylate synthase (ACS), an ethylene synthesis enzyme, and the ethylene signaling pathway were activated in plants pretreated with BRs”
Claim · model-written summary
Scavenging ethylene production or silencing ethylene signaling components inhibited brassinosteroid-induced salt tolerance.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Scavenging of ethylene production or silencing of ethylene signaling componentse2
- Compound
- ethylenee2
- Outcome
- BR-induced salt tolerancee2
- Direction
- inhibitede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e2“Scavenging of ethylene production or silencing of ethylene signaling components inhibited BR-induced salt tolerance”
Claim · model-written summary
Scavenging ethylene production or silencing ethylene signaling components blocked brassinosteroid-induced activities of several antioxidant enzymes.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- Scavenging of ethylene production or silencing of ethylene signaling componentse2
- Outcome
- BR-induced activities of several antioxidant enzymese3
- Direction
- blockede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e2“Scavenging of ethylene production or silencing of ethylene signaling components inhibited BR-induced salt tolerance”
e3“blocked BR-induced activities of several antioxidant enzymes”
Claim · model-written summary
Hydrogen peroxide might be involved in the crosstalk between brassinosteroids and ethylene in the tomato salt response.
- Taxon
- tomatoSolanum lycopersicume4
- Compound
- H 2 O 2e4
- Outcome
- the crosstalk between BRs and ethylenee4
- Qualifier
- might be involvede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“We also found that H 2 O 2 might be involved in the crosstalk between BRs and ethylene in the tomato response to salt stress”
Claim · model-written summary
Brassinosteroid-induced ethylene production was partially blocked by a reactive oxygen species scavenger or synthesis inhibitor.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- a reactive oxygen species scavenger or synthesis inhibitore5
- Outcome
- BR-induced ethylene productione5
- Direction
- partially blockede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e5“BR-induced ethylene production was partially blocked by pretreated with a reactive oxygen species scavenger or synthesis inhibitor”
Claim · model-written summary
Ethylene and H2O2 play important roles in brassinosteroid-dependent induction of salt stress tolerance in tomato.
- Taxon
- tomatoSolanum lycopersicumt0
- Compound
- ethylenee6
- Outcome
- BR-dependent induction of plant salt stress tolerancee6
- Qualifier
- play important rolese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“salt tolerance in tomato”
e6“These results strongly demonstrated that ethylene and H 2 O 2 play important roles in BR-dependent induction of plant salt stress tolerance”
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