Abstract
Limited data are available on the physiological responses of Citrus to nitrogen (N) deficiency. ‘Xuegan’ (Citrus sinensis (L.) Osbeck) and ‘Shantian pummelo’ (Citrus grandis (L.) Osbeck) seedlings were fertilized with nutrient solution at a N concentration of 0, 5, 10, 15 or 20 mM for 10 weeks. N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation. The imbalance of nutrients intensified N deficiency’s adverse impacts on biomass, PETC, CO2 assimilation and biosynthesis of photosynthetic pigments. Citrus displayed adaptive responses to N deficiency, including (a) elevating the distributions of N and other elements in roots, as well as root dry weight (DW)/shoot DW ratio and root-surface-per-unit volume and (b) improving photosynthetic N use efficiency (PNUE). In general, N deficiency had less impact on biomass and photosynthetic pigment levels in C. grandis than in C. sinensis seedlings, demonstrating that the tolerance of C. grandis seedlings to N deficiency was slightly higher than that of C. sinensis seedlings, which might be related to the higher PNUE of the former.
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Claims 13
Claim · model-written summary
Nitrogen deficiency decreased N uptake and N concentration in leaves, stems and roots.
- Treatment
- N deficiencye0
- Outcome
- N uptake and N concentration in leaves, stems and rootse0
- Direction
- decreasede0
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency disturbed nutrient balance and homeostasis.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency inhibiting plant growth.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency reducing photosynthetic pigment levels.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves.
- Treatment
- N deficiencye0
- Outcome
- thylakoid structure and photosynthetic electron transport chain (PETC) in leavese0
- Direction
- impairinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency lowering CO2 assimilation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N deficiency decreased N uptake and N concentration in leaves, stems and roots and disturbed nutrient balance and homeostasis in plants, thus inhibiting plant growth, as well as reducing photosynthetic pigment levels and impairing thylakoid structure and photosynthetic electron transport chain (PETC) in leaves, hence lowering CO2 assimilation.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nutrient imbalance intensified nitrogen deficiency impacts on biomass and photosynthesis.
- Treatment
- N deficiencye0
- Outcome
- adverse impacts on biomass, PETC, CO2 assimilation and biosynthesis of photosynthetic pigmentse0
- Direction
- intensifiede0
- Qualifier
- imbalance of nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The imbalance of nutrients intensified N deficiency’s adverse impacts on biomass, PETC, CO2 assimilation and biosynthesis of photosynthetic pigments.”
e1“physiological responses of Citrus to nitrogen (N) deficiency”
Claim · model-written summary
Nitrogen deficiency elevating distributions of N and other elements in roots.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus displayed adaptive responses to N deficiency, including (a) elevating the distributions of N and other elements in roots, as well as root dry weight (DW)/shoot DW ratio and root-surface-per-unit volume and (b) improving photosynthetic N use efficiency (PNUE).”
Claim · model-written summary
Nitrogen deficiency elevating root dry weight (DW)/shoot DW ratio and root-surface-per-unit volume.
- Treatment
- N deficiencye0
- Outcome
- root dry weight (DW)/shoot DW ratio and root-surface-per-unit volumee0
- Direction
- elevatinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus displayed adaptive responses to N deficiency, including (a) elevating the distributions of N and other elements in roots, as well as root dry weight (DW)/shoot DW ratio and root-surface-per-unit volume and (b) improving photosynthetic N use efficiency (PNUE).”
Claim · model-written summary
Nitrogen deficiency improving photosynthetic N use efficiency (PNUE).
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrus displayed adaptive responses to N deficiency, including (a) elevating the distributions of N and other elements in roots, as well as root dry weight (DW)/shoot DW ratio and root-surface-per-unit volume and (b) improving photosynthetic N use efficiency (PNUE).”
Claim · model-written summary
N deficiency had less impact on biomass in C. grandis than C. sinensis.
- Taxon
- C. grandis
Citrus maximae0 - Treatment
- N deficiencye0
- Outcome
- biomasse0
- Direction
- less impacte0
- Comparator
- C. sinensise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, N deficiency had less impact on biomass and photosynthetic pigment levels in C. grandis than in C. sinensis seedlings, demonstrating that the tolerance of C. grandis seedlings to N deficiency was slightly higher than that of C. sinensis seedlings, which might be related to the higher PNUE of the former.”
Claim · model-written summary
N deficiency had less impact on photosynthetic pigment levels in C. grandis than C. sinensis.
- Taxon
- C. grandisCitrus maximae0
- Treatment
- N deficiencye0
- Outcome
- photosynthetic pigment levelse0
- Direction
- less impacte0
- Comparator
- C. sinensise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, N deficiency had less impact on biomass and photosynthetic pigment levels in C. grandis than in C. sinensis seedlings, demonstrating that the tolerance of C. grandis seedlings to N deficiency was slightly higher than that of C. sinensis seedlings, which might be related to the higher PNUE of the former.”
Claim · model-written summary
Authors inferred slightly higher nitrogen deficiency tolerance in C. grandis, possibly linked to PNUE.
- Taxon
- C. grandisCitrus maximae0
- Outcome
- tolerance of C. grandis seedlings to N deficiencye0
- Direction
- slightly highere0
- Qualifier
- might be related to the higher PNUEe0
- Comparator
- C. sinensise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, N deficiency had less impact on biomass and photosynthetic pigment levels in C. grandis than in C. sinensis seedlings, demonstrating that the tolerance of C. grandis seedlings to N deficiency was slightly higher than that of C. sinensis seedlings, which might be related to the higher PNUE of the former.”
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