Abstract
Abstract Nickel (Ni) excess often generates oxidative stress in chloroplasts, causing redox imbalance, membrane damage and negative impacts on biomass. 24‐Epibrassinolide (EBR) is a plant growth regulator of great interest to the scientific community because it is a natural molecule extracted from plants, is biodegradable and environmentally friendly. This study aimed to determine whether EBR can improve ionic homeostasis, antioxidant enzymes, PSII efficiency and biomass by evaluating nutritional, physiological, biochemical and morphological responses of soybean plants subjected to Ni excess. The experiment used four randomized treatments, with two Ni concentrations (0 and 200 μ m Ni, described as –Ni 2+ and +Ni 2+ , respectively) and two concentrations of EBR (0 and 100 nm EBR, described as –EBR and +EBR, respectively). In general, Ni had deleterious effects on chlorophyll fluorescence and gas exchange. In contrast, EBR enhanced the effective quantum yield of PSII photochemistry (15%) and electron transport rate (19%) due to upregulation of SOD, CAT, APX and POX. Exogenous EBR application promoted significant increases in biomass, and these results were explained by improved nutrient content and ionic homeostasis, as demonstrated by increased Ca 2+ /Ni 2+ , Mg 2+ /Ni +2 and Mn 2+ /Ni 2+ ratios.
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Claims 7
Claim · model-written summary
Nickel excess impaired soybean chlorophyll fluorescence and gas exchange.
- Taxon
- soybean plants
Glycine maxt0 - Treatment
- Nie0
- Outcome
- chlorophyll fluorescence and gas exchangee0
- Direction
- deleteriouse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni had deleterious effects on chlorophyll fluorescence and gas exchange.”
t0“soybean plants”
Claim · model-written summary
Epibrassinolide increased effective PSII quantum yield by 15%.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- EBRe0
- Outcome
- effective quantum yield of PSII photochemistrye0
- Direction
- enhancede0
- Value
- 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EBR enhanced the effective quantum yield of PSII photochemistry (15%) and electron transport rate (19%) due to upregulation of SOD, CAT, APX and POX.”
t0“soybean plants”
Claim · model-written summary
Epibrassinolide increased electron transport rate by 19%.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- EBRe0
- Outcome
- electron transport ratee0
- Direction
- enhancede0
- Value
- 19%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“EBR enhanced the effective quantum yield of PSII photochemistry (15%) and electron transport rate (19%) due to upregulation of SOD, CAT, APX and POX.”
t0“soybean plants”
Claim · model-written summary
Epibrassinolide upregulated SOD, CAT, APX and POX.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- upregulation of SOD, CAT, APX and POXe0
- Direction
- upregulatione0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“due to upregulation of SOD, CAT, APX and POX.”
t0“soybean plants”
Claim · model-written summary
Exogenous EBR significantly increased soybean biomass.
- Taxon
- soybean plantsGlycine maxt0
- Treatment
- Exogenous EBR applicatione0
- Outcome
- biomasse0
- Direction
- increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous EBR application promoted significant increases in biomass”
t0“soybean plants”
Claim · model-written summary
EBR increased calcium-to-nickel, magnesium-to-nickel and manganese-to-nickel ratios.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- Ca 2+ /Ni 2+ , Mg 2+ /Ni +2 and Mn 2+ /Ni 2+ ratiose0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased Ca 2+ /Ni 2+ , Mg 2+ /Ni +2 and Mn 2+ /Ni 2+ ratios.”
t0“soybean plants”
Claim · model-written summary
Improved nutrient content and ionic homeostasis were proposed to explain biomass gains.
- Taxon
- soybean plantsGlycine maxt0
- Outcome
- these resultse0
- Qualifier
- improved nutrient content and ionic homeostasise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these results were explained by improved nutrient content and ionic homeostasis”
t0“soybean plants”
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See all 9 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.