Abstract
Drought frequently results in significant losses in agricultural systems, including the soybean yield. Brassinosteroids exhibit multiple actions on essential processes, including chlorophyll fluorescence and gas exchange. Considering that the electron transport rate (ETR) into photosystems can exercise interference on net photosynthetic rate (PN), this research aims to determine whether 24-epibrassinolide (EBR) affects electron transport and find out if there is any repercussion on photosynthesis in soybean plants affected by the water deficit. The experiment was performed using a randomized factorial design, with two water conditions (control and water deficit) and three EBR concentrations (0, 50, and 100 nM EBR). The water deficit reduced effective quantum yield of PSII photochemistry, ETR, PN, and water-use efficiency. However, the exogenous application of 100 nM EBR mitigated these negative effects, increasing these variables. EBR reduced the oxidant compounds (superoxide and hydrogen peroxide) and membrane damages (malondialdehyde and electrolyte leakage) in stressed plants. Our study proved that EBR increased ETR and PN in control and stressed plants, revealing that ETR had a strong relationship with PN. These results suggest that soybean plants with higher values of ETR are more efficient in relation to PN.
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Claims 8
Claim · model-written summary
Water deficit reduced soybean PSII quantum yield and electron transport rate.
- Taxon
- soybean plants
Glycine maxt0 - Treatment
- water deficite0
- Outcome
- effective quantum yield of PSII photochemistry, ETRe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water deficit reduced effective quantum yield of PSII photochemistry, ETR, PN, and water-use efficiency.”
t0“soybean plants”
Claim · model-written summary
Water deficit reduced soybean photosynthetic rate and water-use efficiency.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- water deficite0
- Outcome
- PN, and water-use efficiencye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The water deficit reduced effective quantum yield of PSII photochemistry, ETR, PN, and water-use efficiency.”
t0“soybean plants”
Claim · model-written summary
Applying 100 nM EBR increased PSII quantum yield and electron transport in stressed soybean.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- exogenous application of 100 nM EBRe0
- Outcome
- effective quantum yield of PSII photochemistry, ETRe1
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exogenous application of 100 nM EBR mitigated these negative effects, increasing these variables”
e1“effective quantum yield of PSII photochemistry, ETR, PN, and water-use efficiency”
t0“soybean plants”
Claim · model-written summary
Applying 100 nM EBR increased photosynthetic rate and water-use efficiency in stressed soybean.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- exogenous application of 100 nM EBRe0
- Outcome
- PN, and water-use efficiencye1
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the exogenous application of 100 nM EBR mitigated these negative effects, increasing these variables”
e1“PN, and water-use efficiency”
t0“soybean plants”
Claim · model-written summary
EBR reduced superoxide and hydrogen peroxide in water-stressed soybean.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- EBRe0
- Outcome
- superoxide and hydrogen peroxidee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EBR reduced the oxidant compounds (superoxide and hydrogen peroxide) and membrane damages (malondialdehyde and electrolyte leakage) in stressed plants.”
t0“soybean plants”
Claim · model-written summary
EBR reduced malondialdehyde and electrolyte leakage in water-stressed soybean.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- EBRe0
- Outcome
- malondialdehyde and electrolyte leakagee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EBR reduced the oxidant compounds (superoxide and hydrogen peroxide) and membrane damages (malondialdehyde and electrolyte leakage) in stressed plants.”
t0“soybean plants”
Claim · model-written summary
EBR increased electron transport and photosynthetic rate in both control and stressed soybean.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- EBRe0
- Outcome
- ETR and PNe0
- Direction
- increasede0
- Qualifier
- control and stressed plantse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EBR increased ETR and PN in control and stressed plants”
t0“soybean plants”
Claim · model-written summary
Electron transport rate was strongly related to net photosynthetic rate in soybean.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- PNe0
- Qualifier
- strong relationshipe0
- Comparator
- ETRe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ETR had a strong relationship with PN”
t0“soybean plants”
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