Abstract
By spraying tomato leaves with reduced glutathione (GSH), oxidized glutathione (GSSG) and glutathione synthesis inhibitor (BSO), respectively, the effects of glutathion-mediated redox state on leaf photosynthesis in tomato under NaCl stress were investigated. The results showed that the application of exogenous GSH significantly induced an increase in reducing power level, in- creased the net photosynthetic rate (Pn), stomatal conductance (g(s)), transpiration rate (Tr), as well as the maximum quantum yield of PS II (Fv/Fm), actual photochemical efficiency of PS II (ΦPS II), photochemical quenching coefficient (q(P)) and non-photochemical quenching coefficient (NPQ), and enhanced the Rubisco activity and expression levels of RbcL, RbcS and RCA genes in leaves of tomato seedlings under NaCl stress. These results suggested that GSH alleviated salt-induced oxidative stress by protecting PS II from damage caused by excess energy, and improving the photochemical efficiency of PS II and dark reaction activity of photosynthesis. Although spraying GSSG decreased the level of reducing power and further aggravated the damage and photoinhibition of the leaf photosynthetic apparatus, Pn was not affected in combined stressed (NaCl and GSSG) plants, which might be due to the up-regulation of expression levels of RbcL and RbcS genes. The application of BSO had no significant effects on redox state, CO2 conductivity capacity and PS II photochemical efficiency in tomato leaves under NaCl stress. However, compared to salt singly stressed plants, BSO application increased Pn, likely due to the up-regulation of Rubisco initial activity and RCA and RbcS expression levels.
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Claims 12
Claim · model-written summary
GSH increased reducing power in salt-stressed tomato seedlings.
- Taxon
- tomato
Solanum lycopersicume1 - Treatment
- exogenous GSHe0
- Outcome
- reducing power levele0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of exogenous GSH significantly induced an increase in reducing power level”
e1“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
GSH increased Pn, stomatal conductance and transpiration under salt stress.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- exogenous GSHe0
- Outcome
- net photosynthetic rate (Pn), stomatal conductance (g(s)), transpiration rate (Tr)e0
- Direction
- in- creasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of exogenous GSH significantly induced an increase in reducing power level, in- creased the net photosynthetic rate (Pn), stomatal conductance (g(s)), transpiration rate (Tr)”
e1“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
GSH increased PS II yield and photochemical efficiency and quenching measures.
- Taxon
- tomatoSolanum lycopersicume2
- Treatment
- exogenous GSHe0
- Outcome
- maximum quantum yield of PS II (Fv/Fm), actual photochemical efficiency of PS II (ΦPS II), photochemical quenching coefficient (q(P)) and non-photochemical quenching coefficient (NPQ)e1
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the application of exogenous GSH significantly induced an increase in reducing power level”
e1“the maximum quantum yield of PS II (Fv/Fm), actual photochemical efficiency of PS II (ΦPS II), photochemical quenching coefficient (q(P)) and non-photochemical quenching coefficient (NPQ)”
e2“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
GSH enhanced Rubisco activity.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous GSHe1
- Gene
- Rubiscoe0
- Outcome
- Rubisco activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced the Rubisco activity and expression levels of RbcL, RbcS and RCA genes in leaves of tomato seedlings under NaCl stress”
e1“application of exogenous GSH”
Claim · model-written summary
GSH enhanced expression of RbcL, RbcS and RCA.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- exogenous GSHe1
- Gene
- RbcL, RbcS and RCAe0
- Outcome
- expression levels of RbcL, RbcS and RCA genese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enhanced the Rubisco activity and expression levels of RbcL, RbcS and RCA genes in leaves of tomato seedlings under NaCl stress”
e1“application of exogenous GSH”
Claim · model-written summary
GSSG decreased reducing power.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- spraying GSSGe0
- Outcome
- level of reducing powere0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying GSSG decreased the level of reducing power”
e1“in leaves of tomato seedlings under NaCl stress”
e2“The application of BSO had no significant effects on redox state, CO2 conductivity capacity and PS II photochemical efficiency in tomato leaves under NaCl stress”
Claim · model-written summary
GSSG aggravated damage and photoinhibition of the leaf photosynthetic apparatus.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- spraying GSSGe0
- Outcome
- damage and photoinhibition of the leaf photosynthetic apparatuse0
- Direction
- aggravatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spraying GSSG decreased the level of reducing power and further aggravated the damage and photoinhibition of the leaf photosynthetic apparatus”
e1“in leaves of tomato seedlings under NaCl stress”
e2“The application of BSO had no significant effects on redox state, CO2 conductivity capacity and PS II photochemical efficiency in tomato leaves under NaCl stress”
Claim · model-written summary
Pn was unaffected by combined NaCl and GSSG stress.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- NaCl and GSSGe0
- Outcome
- Pne0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn was not affected in combined stressed (NaCl and GSSG) plants”
e1“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
RbcL and RbcS expression was upregulated under combined NaCl and GSSG stress.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- NaCl and GSSGe0
- Gene
- RbcL and RbcSe0
- Outcome
- expression levels of RbcL and RbcS genese0
- Direction
- up-regulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“combined stressed (NaCl and GSSG) plants, which might be due to the up-regulation of expression levels of RbcL and RbcS genes”
e1“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
BSO had no significant effect on redox state, CO2 conductivity or PS II efficiency under salt stress.
- Taxon
- tomatoSolanum lycopersicume0
- Treatment
- BSOe0
- Outcome
- redox state, CO2 conductivity capacity and PS II photochemical efficiencye0
- Direction
- no significant effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of BSO had no significant effects on redox state, CO2 conductivity capacity and PS II photochemical efficiency in tomato leaves under NaCl stress”
Claim · model-written summary
BSO increased Pn compared with salt stress alone.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- BSO applicatione0
- Outcome
- Pne0
- Direction
- increasede0
- Comparator
- salt singly stressed plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“compared to salt singly stressed plants, BSO application increased Pn”
e1“in leaves of tomato seedlings under NaCl stress”
Claim · model-written summary
BSO upregulated initial Rubisco activity and RCA and RbcS expression.
- Taxon
- tomatoSolanum lycopersicume1
- Treatment
- BSO applicatione0
- Gene
- RCA and RbcSe0
- Outcome
- Rubisco initial activity and RCA and RbcS expression levelse0
- Direction
- up-regulatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BSO application increased Pn, likely due to the up-regulation of Rubisco initial activity and RCA and RbcS expression levels”
e1“in leaves of tomato seedlings under NaCl stress”
The same questions in other papers
glutathione · molecular: expression · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
glutathione · physiology: photosynthesis · Solanum lycopersicum (tomato)Results agree
2 papers in the same direction as this paper
- positive
- positive
application · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
2 papers in the same direction as this paper · 41 in the opposite direction
- positive
- positive
- positive
40 papers more in this group
See all 44 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.