Abstract
Fully expanded leaves of tomato (Lycopersicon esculentum) growing with either complete or nitrogen-deficient nutrient solution were analysed for leaf water status, gas exchange and chlorophyll fluorescence during the vegetative and reproductive phases. N-deficiency did not affect leaf water relations but did decrease light saturated photosynthetic rate as well as stomatal conductance in the vegetative stage. A lower variable to maximum fluorescence ratio (Fv/Fm) was found in N-limited plants which also showed an increase in leaf starch content and in starch to sucrose ratio. The inhibition of photosynthesis and the alteration of photosynthates partitioning were responsible for the growth reduction in N-stressed plants. During the reproductive phase the limitation of photosynthesis may be due to a large accumulation of starch which determines both a decrease in the carbon demand from the sinks and a decrease in CO2 conductance in the mesophyll.
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 7
Claim · model-written summary
Nitrogen deficiency did not affect leaf water relations.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- N-deficiencye0
- Outcome
- leaf water relationse0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N-deficiency did not affect leaf water relations”
t0“tomato (Lycopersicon esculentum)”
Claim · model-written summary
Nitrogen deficiency reduced light saturated photosynthetic rate in the vegetative stage.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- vegetative stagee0
- Treatment
- N-deficiencye0
- Outcome
- light saturated photosynthetic ratee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N-deficiency did not affect leaf water relations but did decrease light saturated photosynthetic rate as well as stomatal conductance in the vegetative stage.”
t0“tomato (Lycopersicon esculentum)”
Claim · model-written summary
Nitrogen deficiency reduced stomatal conductance in the vegetative stage.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- vegetative stagee0
- Treatment
- N-deficiencye1
- Outcome
- stomatal conductancee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decrease light saturated photosynthetic rate as well as stomatal conductance in the vegetative stage”
t0“tomato (Lycopersicon esculentum)”
e1“N-deficiency did not affect leaf water relations”
Claim · model-written summary
N-limited plants had lower Fv/Fm.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- N-limitede0
- Outcome
- variable to maximum fluorescence ratio (Fv/Fm)e0
- Direction
- lowere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A lower variable to maximum fluorescence ratio (Fv/Fm) was found in N-limited plants”
t0“tomato (Lycopersicon esculentum)”
Claim · model-written summary
N-limited plants had increased leaf starch content and starch-to-sucrose ratio.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- N-limitede0
- Outcome
- leaf starch content and in starch to sucrose ratioe0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N-limited plants which also showed an increase in leaf starch content and in starch to sucrose ratio”
t0“tomato (Lycopersicon esculentum)”
Claim · model-written summary
Photosynthesis inhibition and altered photosynthate partitioning contributed to growth reduction.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- growth reductione0
- Qualifier
- inhibition of photosynthesis and the alteration of photosynthates partitioninge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibition of photosynthesis and the alteration of photosynthates partitioning were responsible for the growth reduction in N-stressed plants.”
t0“tomato (Lycopersicon esculentum)”
Claim · model-written summary
During reproduction, starch accumulation may limit photosynthesis through reduced sink carbon demand and mesophyll CO2 conductance.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- reproductive phasee0
- Outcome
- limitation of photosynthesise0
- Qualifier
- large accumulation of starche0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the reproductive phase the limitation of photosynthesis may be due to a large accumulation of starch which determines both a decrease in the carbon demand from the sinks and a decrease in CO2 conductance in the mesophyll.”
t0“tomato (Lycopersicon esculentum)”
The same questions in other papers
nitrogen · physiology: gas exchange · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- negative
- positive
nitrogen · physiology: water · Solanum lycopersicum (tomato)Positive and negative results
4 papers in the same direction as this paper · 7 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
8 papers more in this group
See all 12 papers →nitrogen · physiology: photosynthesis · Solanum lycopersicum (tomato)Positive and negative results
11 papers in the same direction as this paper · 5 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- negative
- negative
- no effect
13 papers more in this group
See all 17 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.