Abstract
Abstract The effect of nitrogen (30 and 120 mg N per cuvette) on photosynthetic rate of four cultivars of triticale (‘Bolero’, ‘Grado’, ‘Largo’, and ‘Lasko’) grown 14 days in phytotron was strongly modified by water content (75, 45 and 35% of full water capacity). For plants grown under 35% of full water capacity, it was higher when they were grown under 30 than under 120 mg N/cuvette (9.88 and 8.76 μmol CO2 m−2 s−1, respectively) but for plants grown under 45 and 75% of full water capacity there were not significant differences. Transpiration, stomatal conductance, photosynthetic water use efficiency, and internal water use efficiency were not influenced by nitrogen doses independently of water content. Photosynthetic rate, transpiration, stomatal conductance, photosynthetic water use efficiency, and dry matter of studied cultivars of triticale grown under 45 and 35% of full water capacity and both nitrogen doses were lower than for plants grown under 75% of full water capacity. With lowering of water content stomatal conductance was decreasing similarly as photosynthetic rate e.g. for plants grown under 35% of full water capacity as compared with those grown under 75% of full water capacity average stomatal conductance decreased from 0.209 to 0.138 mol H2O m−2 s−1 and photosynthetic rate from 13.69 to 9.32 μmol CO2 m−2 s−1 and as a result there were not significant differences in internal water use efficiency for all studied combinations (67.09 μmol CO2 mol−1 H2O) which shows that stomatal factors were mainly responsible for changes of photosynthetic rate. With lowering of water content from 75 to 35% of full water capacity the decrease of photosynthetic rate and stomatal conductance was much higher than the decreases of transpiration (from 3.57 to 3.02 mmol H2O m−2 s−1) what shows not direct dependence of transpiration on stomatal conductance (water use efficiency decreased from 3.87 to 3.10 μmol CO2 mmol−1 H2O). The effect of nitrogen on dry matter production was strongly modified by water availability e.g. for plants grown under 35% of full water capacity, dry matter was similarly independent of nitrogen dose but for plants grown under 45 and 75% of full water capacity dry matter was significantly higher than when they were grown under 120 (79.05 and 86.75 mg, respectively) or with 30 mg N/cuvette (74.03 and 80.30 mg, respectively). Keywords: triticalenitrogendroughtgas exchangedry matter
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Claims 12
Claim · model-written summary
At 35% water capacity, photosynthesis was higher with 30 than 120 mg nitrogen.
- Taxon
- TRITICALE
×Triticosecalet0 - Treatment
- 30e0
- Outcome
- photosynthetic ratee1
- Direction
- highere0
- Value
- 9.88e0
- Qualifier
- 35% of full water capacitye0
- Comparator
- 120 mg N/cuvettee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For plants grown under 35% of full water capacity, it was higher when they were grown under 30 than under 120 mg N/cuvette (9.88 and 8.76 μmol CO2 m−2 s−1, respectively)”
t0“TRITICALE SEEDLINGS”
e1“Photosynthetic rate, transpiration, stomatal conductance, photosynthetic water use efficiency, and dry matter of studied cultivars of triticale grown under 45 and 35% of full water capacity and both nitrogen doses were lower than for plants grown under 75% of full water capacity”
Claim · model-written summary
Nitrogen doses did not significantly alter photosynthesis at 45 or 75% water capacity.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- nitrogene1
- Outcome
- photosynthetic ratee2
- Direction
- not significant differencese0
- Qualifier
- 45 and 75% of full water capacitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but for plants grown under 45 and 75% of full water capacity there were not significant differences”
t0“TRITICALE SEEDLINGS”
e1“Transpiration, stomatal conductance, photosynthetic water use efficiency, and internal water use efficiency were not influenced by nitrogen doses independently of water content”
e2“Photosynthetic rate, transpiration, stomatal conductance, photosynthetic water use efficiency, and dry matter of studied cultivars of triticale grown under 45 and 35% of full water capacity and both nitrogen doses were lower than for plants grown under 75% of full water capacity”
Claim · model-written summary
Nitrogen dose did not influence transpiration, stomatal conductance or water use efficiencies.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- nitrogen dosese0
- Outcome
- Transpiration, stomatal conductance, photosynthetic water use efficiencye0
- Direction
- not influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transpiration, stomatal conductance, photosynthetic water use efficiency, and internal water use efficiency were not influenced by nitrogen doses independently of water content”
t0“TRITICALE SEEDLINGS”
Claim · model-written summary
Water limitation lowered photosynthesis, transpiration and stomatal conductance.
- Taxon
- triticale×Triticosecalee0
- Treatment
- 45 and 35% of full water capacitye0
- Outcome
- Photosynthetic rate, transpiration, stomatal conductancee0
- Direction
- lowere0
- Comparator
- 75% of full water capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic rate, transpiration, stomatal conductance, photosynthetic water use efficiency, and dry matter of studied cultivars of triticale grown under 45 and 35% of full water capacity and both nitrogen doses were lower than for plants grown under 75% of full water capacity”
Claim · model-written summary
Water limitation lowered photosynthetic water use efficiency and dry matter.
- Taxon
- triticale×Triticosecalee0
- Treatment
- 45 and 35% of full water capacitye0
- Outcome
- photosynthetic water use efficiency, and dry mattere0
- Direction
- lowere0
- Comparator
- 75% of full water capacitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Photosynthetic rate, transpiration, stomatal conductance, photosynthetic water use efficiency, and dry matter of studied cultivars of triticale grown under 45 and 35% of full water capacity and both nitrogen doses were lower than for plants grown under 75% of full water capacity”
Claim · model-written summary
As water capacity fell from 75 to 35%, stomatal conductance fell from 0.209 to 0.138.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- 35% of full water capacitye1
- Outcome
- stomatal conductancee0
- Direction
- decreasede0
- Value
- 0.138 mol H2O m−2 s−1e0
- Qualifier
- 0.209e0
- Comparator
- 75% of full water capacitye2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“average stomatal conductance decreased from 0.209 to 0.138 mol H2O m−2 s−1”
t0“TRITICALE SEEDLINGS”
e1“For plants grown under 35% of full water capacity, it was higher when they were grown under 30 than under 120 mg N/cuvette (9.88 and 8.76 μmol CO2 m−2 s−1, respectively)”
e2“but for plants grown under 45 and 75% of full water capacity there were not significant differences”
Claim · model-written summary
As water capacity fell, photosynthesis fell from 13.69 to 9.32.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- 35% of full water capacitye1
- Outcome
- photosynthetic ratee0
- Value
- 9.32 μmol CO2 m−2 s−1e0
- Qualifier
- 13.69e0
- Comparator
- 75% of full water capacitye2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic rate from 13.69 to 9.32 μmol CO2 m−2 s−1”
t0“TRITICALE SEEDLINGS”
e1“For plants grown under 35% of full water capacity, it was higher when they were grown under 30 than under 120 mg N/cuvette (9.88 and 8.76 μmol CO2 m−2 s−1, respectively)”
e2“but for plants grown under 45 and 75% of full water capacity there were not significant differences”
Claim · model-written summary
Internal water use efficiency did not differ significantly among studied combinations.
- Taxon
- TRITICALE×Triticosecalet0
- Outcome
- internal water use efficiencye0
- Direction
- not significant differencese0
- Value
- 67.09 μmol CO2 mol−1 H2Oe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were not significant differences in internal water use efficiency for all studied combinations (67.09 μmol CO2 mol−1 H2O)”
t0“TRITICALE SEEDLINGS”
Claim · model-written summary
Transpiration declined from 3.57 to 3.02 under lower water content.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- water contente1
- Outcome
- transpiratione0
- Direction
- decreasese0
- Value
- 3.02 mmol H2O m−2 s−1e0
- Qualifier
- 3.57e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreases of transpiration (from 3.57 to 3.02 mmol H2O m−2 s−1)”
t0“TRITICALE SEEDLINGS”
e1“Transpiration, stomatal conductance, photosynthetic water use efficiency, and internal water use efficiency were not influenced by nitrogen doses independently of water content”
Claim · model-written summary
Water use efficiency declined from 3.87 to 3.10.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- water contente1
- Outcome
- water use efficiencye0
- Direction
- decreasede0
- Value
- 3.10 μmol CO2 mmol−1 H2Oe0
- Qualifier
- 3.87e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water use efficiency decreased from 3.87 to 3.10 μmol CO2 mmol−1 H2O”
t0“TRITICALE SEEDLINGS”
e1“Transpiration, stomatal conductance, photosynthetic water use efficiency, and internal water use efficiency were not influenced by nitrogen doses independently of water content”
Claim · model-written summary
Nitrogen dose did not affect dry matter at 35% water capacity.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- nitrogen dosee0
- Outcome
- dry mattere0
- Direction
- independente0
- Qualifier
- 35% of full water capacitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for plants grown under 35% of full water capacity, dry matter was similarly independent of nitrogen dose”
t0“TRITICALE SEEDLINGS”
Claim · model-written summary
At 45 and 75% water capacity, 120 mg nitrogen produced more dry matter than 30 mg.
- Taxon
- TRITICALE×Triticosecalet0
- Treatment
- 120e0
- Outcome
- dry mattere0
- Direction
- highere0
- Value
- 79.05 and 86.75 mge0
- Qualifier
- 45 and 75% of full water capacitye0
- Comparator
- 30 mg N/cuvettee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for plants grown under 45 and 75% of full water capacity dry matter was significantly higher than when they were grown under 120 (79.05 and 86.75 mg, respectively) or with 30 mg N/cuvette (74.03 and 80.30 mg, respectively)”
t0“TRITICALE SEEDLINGS”
The same questions in other papers
nitrogen · physiology: photosynthesis · x Triticosecale (triticale)Positive and negative results
1 in the opposite direction
- positive
nitrogen · growth · x Triticosecale (triticale)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 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.