Abstract
Manganese deficiency critically impairs the function and stability of photosystem II (PSII) and negatively impacts crop growth and yield. However, the response mechanisms of carbon and nitrogen metabolism to Mn deficiency in different genotypes of maize and the differences in Mn deficiency tolerance are unclear. Herein, three different genotypes of maize seedlings (sensitive genotype: Mo17, tolerant genotype: B73, and B73 × Mo17) were exposed to Mn deficiency treatment for 16 days using liquid culture with different concentrations of MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]. We found that complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity. This resulted in reduced leaf and root nitrogen uptake, with Mo17 being most severely inhibited. B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17, which resulted in higher accumulation of soluble sugars and sucrose and maintenance of the osmoregulation capacity of leaves, which helped mitigate damage caused by Mn deficiency. The findings revealed the physiological regulation mechanism of carbon and nitrogen metabolism in different genotypes of maize seedlings that resist Mn deficiency stress, providing a theoretical basis for developing high yield and quality.
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Claims 12
Claim · model-written summary
Complete Mn deficiency significantly reduced maize seedling biomass.
- Treatment
- complete Mn deficiencye2
- Outcome
- maize seedling biomasse2
- Direction
- reducede2
- Comparator
- controle1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e1“MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
Claim · model-written summary
Complete Mn deficiency negatively affected photosynthetic and chlorophyll fluorescence parameters.
- Treatment
- complete Mn deficiencye2
- Outcome
- photosynthetic and chlorophyll fluorescence parameterse2
- Direction
- negatively affectede2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e1“MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
Claim · model-written summary
Complete Mn deficiency depressed nitrate reductase, glutamine synthetase and glutamate synthase activity.
- Treatment
- complete Mn deficiencye2
- Outcome
- nitrate reductase, glutamine synthetase, and glutamate synthase activitye2
- Direction
- depressede2
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e1“MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
Claim · model-written summary
Mn deficiency reduced leaf and root nitrogen uptake.
- Organ / stage
- leaf and roote3
- Treatment
- complete Mn deficiencye2
- Outcome
- nitrogen uptakee3
- Direction
- reducede3
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e1“MnSO4 [0.00, 2.23, 11.65, and 22.30 mg/L (control)]”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e3“This resulted in reduced leaf and root nitrogen uptake, with Mo17 being most severely inhibited”
Claim · model-written summary
Under Mn deficiency, the Mo17 genotype was the most severely inhibited in nitrogen uptake.
- Material
- Mo17e3
- Treatment
- complete Mn deficiencye2
- Outcome
- nitrogen uptakee3
- Direction
- most severely inhibitede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e3“This resulted in reduced leaf and root nitrogen uptake, with Mo17 being most severely inhibited”
Claim · model-written summary
Under Mn deficiency, B73 maintained higher sucrose phosphate synthase and sucrose synthase activities than Mo17.
- Material
- B73e4
- Treatment
- complete Mn deficiencye2
- Outcome
- sucrose phosphate synthase and sucrose synthase activitiese4
- Direction
- highere4
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
Claim · model-written summary
Under Mn deficiency, B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities than Mo17.
- Material
- B73 × Mo17e4
- Treatment
- complete Mn deficiencye2
- Outcome
- sucrose phosphate synthase and sucrose synthase activitiese4
- Direction
- highere4
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
Claim · model-written summary
Under Mn deficiency, B73 had lower neutral convertase activity than Mo17.
- Material
- B73e4
- Treatment
- complete Mn deficiencye2
- Outcome
- neutral convertase activitye4
- Direction
- lowere4
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
Claim · model-written summary
Under Mn deficiency, B73 × Mo17 had lower neutral convertase activity than Mo17.
- Material
- B73 × Mo17e4
- Treatment
- complete Mn deficiencye2
- Outcome
- neutral convertase activitye4
- Direction
- lowere4
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
Claim · model-written summary
Under Mn deficiency, B73 had higher accumulation of soluble sugars and sucrose than Mo17.
- Material
- B73e4
- Treatment
- complete Mn deficiencye2
- Outcome
- accumulation of soluble sugars and sucrosee5
- Direction
- highere5
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
e5“which resulted in higher accumulation of soluble sugars and sucrose and maintenance of the osmoregulation capacity of leaves, which helped mitigate damage caused by Mn deficiency”
Claim · model-written summary
Under Mn deficiency, B73 × Mo17 had higher accumulation of soluble sugars and sucrose than Mo17.
- Material
- B73 × Mo17e4
- Treatment
- complete Mn deficiencye2
- Outcome
- accumulation of soluble sugars and sucrosee5
- Direction
- highere5
- Comparator
- Mo17e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e2“complete Mn deficiency significantly reduced maize seedling biomass; negatively affected the photosynthetic and chlorophyll fluorescence parameters; and depressed nitrate reductase, glutamine synthetase, and glutamate synthase activity”
e4“B73 and B73 × Mo17 maintained higher sucrose phosphate synthase and sucrose synthase activities and lower neutral convertase activity compared to Mo17”
e5“which resulted in higher accumulation of soluble sugars and sucrose and maintenance of the osmoregulation capacity of leaves, which helped mitigate damage caused by Mn deficiency”
Claim · model-written summary
Higher soluble sugars and sucrose with maintained leaf osmoregulation appear to mitigate damage caused by Mn deficiency.
- Compound
- soluble sugars and sucrosee5
- Outcome
- damage caused by Mn deficiencye5
- Qualifier
- maintenance of the osmoregulation capacity of leavese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Zea mays L.”
e5“which resulted in higher accumulation of soluble sugars and sucrose and maintenance of the osmoregulation capacity of leaves, which helped mitigate damage caused by Mn deficiency”
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