Abstract
In maize (Zea mays L., cv Contessa), nitrogen (NO(3) (-)) limitation resulted in a reduction in shoot growth and photosynthetic capacity and in an increase in the leaf zeaxanthin contents. Nitrogen deficiency had only a small effect on the quantum yield of CO(2) assimilation but a large effect on the light-saturated rate of photosynthesis. Linear relationships persisted between the quantum yield of CO(2) assimilation and that of photosystem II photochemistry in all circumstances. At high irradiances, large differences in photochemical quenching and nonphotochemical quenching of Chl a fluorescence as well as the ratio of variable to maximal fluorescence (Fv/Fm) were apparent between nitrogen-deficient plants and nitrogen-replete controls, whereas at low irradiances these parameters were comparable in all plants. Light intensity-dependent increases in nonphotochemical quenching were greatest in nitrogen-deficient plants as were the decreases in Fv/Fm ratio. In nitrogen-deficient plants, photochemical quenching decreased with increasing irradiance but remained higher than in controls at high irradiances. Thermal dissipative processes were enhanced as a result of nitrogen deficiency (nonphotochemical quenching was elevated and Fv/Fm was lowered) allowing PSII to remain relatively oxidised even when carbon metabolism was limited via nitrogen limitation.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Nitrogen limitation reduced shoot growth.
- Material
- Contessae0
- Treatment
- nitrogen (NO(3) (-)) limitatione0
- Outcome
- shoot growthe0
- Direction
- reductione0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In maize (Zea mays L., cv Contessa), nitrogen (NO(3) (-)) limitation resulted in a reduction in shoot growth and photosynthetic capacity and in an increase in the leaf zeaxanthin contents”
Claim · model-written summary
Nitrogen limitation reduced photosynthetic capacity.
- Material
- Contessae0
- Treatment
- nitrogen (NO(3) (-)) limitatione0
- Outcome
- photosynthetic capacitye0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In maize (Zea mays L., cv Contessa), nitrogen (NO(3) (-)) limitation resulted in a reduction in shoot growth and photosynthetic capacity and in an increase in the leaf zeaxanthin contents”
Claim · model-written summary
Nitrogen limitation increased leaf zeaxanthin content.
- Material
- Contessae0
- Treatment
- nitrogen (NO(3) (-)) limitatione0
- Outcome
- leaf zeaxanthin contentse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In maize (Zea mays L., cv Contessa), nitrogen (NO(3) (-)) limitation resulted in a reduction in shoot growth and photosynthetic capacity and in an increase in the leaf zeaxanthin contents”
Claim · model-written summary
Nitrogen deficiency had a small effect on quantum yield of CO2 assimilation.
- Treatment
- Nitrogen deficiencye0
- Outcome
- quantum yield of CO(2) assimilatione0
- Qualifier
- only a small effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen deficiency had only a small effect on the quantum yield of CO(2) assimilation”
t0“Maize”
t1“Maize”
Claim · model-written summary
Nitrogen deficiency had a large effect on light-saturated photosynthesis.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but a large effect on the light-saturated rate of photosynthesis”
t0“Maize”
t1“Maize”
e1“Nitrogen deficiency had only a small effect on the quantum yield of CO(2) assimilation”
Claim · model-written summary
Quantum yields of CO2 assimilation and PSII photochemistry maintained a linear relationship.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Linear relationships persisted between the quantum yield of CO(2) assimilation and that of photosystem II photochemistry in all circumstances”
t0“Maize”
t1“Maize”
Claim · model-written summary
At high irradiance nitrogen-deficient and replete plants differed in photochemical and nonphotochemical quenching and Fv/Fm.
- Treatment
- nitrogen-deficient plantse0
- Outcome
- photochemical quenching and nonphotochemical quenching of Chl a fluorescence as well as the ratio of variable to maximal fluorescence (Fv/Fm)e0
- Comparator
- nitrogen-replete controlse0
- Setting
- high irradiancese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At high irradiances, large differences in photochemical quenching and nonphotochemical quenching of Chl a fluorescence as well as the ratio of variable to maximal fluorescence (Fv/Fm) were apparent between nitrogen-deficient plants and nitrogen-replete controls”
t0“Maize”
t1“Maize”
Claim · model-written summary
At low irradiance the same fluorescence parameters were comparable among plants.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas at low irradiances these parameters were comparable in all plants”
t0“Maize”
t1“Maize”
Claim · model-written summary
Irradiance-related nonphotochemical quenching increases were greatest under nitrogen deficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Light intensity-dependent increases in nonphotochemical quenching were greatest in nitrogen-deficient plants”
t0“Maize”
t1“Maize”
Claim · model-written summary
Irradiance-related Fv/Fm decreases were greatest under nitrogen deficiency.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as were the decreases in Fv/Fm ratio”
t0“Maize”
t1“Maize”
e1“Light intensity-dependent increases in nonphotochemical quenching were greatest in nitrogen-deficient plants”
Claim · model-written summary
Under nitrogen deficiency photochemical quenching decreased with irradiance but remained higher than controls at high irradiance.
- Treatment
- increasing irradiancee0
- Outcome
- photochemical quenchinge0
- Direction
- decreasede0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photochemical quenching decreased with increasing irradiance but remained higher than in controls at high irradiances”
t0“Maize”
t1“Maize”
Claim · model-written summary
Nitrogen deficiency enhanced thermal dissipation, with elevated nonphotochemical quenching and lower Fv/Fm.
- Treatment
- nitrogen deficiencye0
- Outcome
- Thermal dissipative processese0
- Direction
- enhancede0
- Qualifier
- allowing PSII to remain relatively oxidisede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Thermal dissipative processes were enhanced as a result of nitrogen deficiency (nonphotochemical quenching was elevated and Fv/Fm was lowered) allowing PSII to remain relatively oxidised even when carbon metabolism was limited via nitrogen limitation”
t0“Maize”
t1“Maize”
The same questions in other papers
nitrogen · physiology: photosynthesis · Zea mays (maize)Positive and negative results
19 papers in the same direction as this paper · 78 in the opposite direction
- positive
- positive
- positive
94 papers more in this group
See all 98 papers →nitrogen · growth · Zea mays (maize)Positive and negative results
128 papers in the same direction as this paper · 619 in the opposite direction
- positive
- positive
- negative
744 papers more in this group
See all 748 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.