Abstract
Diurnal changes of photosynthetic rate in millet leaves were observed under low relative humidity (about 5%RH), high CO 2 concentration (730 μl CO 2/L) and assimilate accumulation by heat girdling of leaf sheath by CI 301 CO 2 gas analyzer. It was found that the midday depressions of photosynthesis in nature conditions (Fig.1) and low RH(Fig.2) and high CO 2 concentration treatments(Fig.3) were significantly correlated with the accumulation of photosynthates. High CO 2 concentration(730 μl CO 2/L) can increase photosynthetic rate(Fig.4) and decrease transpiration rate(E), so improve water use efficiency(WUE) greatly. Low relative humidity(5%RH) can decrease photosynthetic rate(P n), but improve WUE too, it is why low RH decease stomatal aperture and the E is more dependent on the stomata than P n; assimilate accumulation(heat girdling of leaf sheath) could decrease P n and WUE(Table 1).
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Claims 9
Claim · model-written summary
Midday photosynthetic depression correlated significantly with photosynthate accumulation under natural, low humidity and high CO2 conditions.
- Taxon
- Setaria italica
Setaria italicat0 - Compound
- photosynthatese0
- Outcome
- midday depressions of photosynthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“midday depressions of photosynthesis in nature conditions (Fig.1) and low RH(Fig.2) and high CO 2 concentration treatments(Fig.3) were significantly correlated with the accumulation of photosynthates”
t0“Setaria italica”
Claim · model-written summary
High CO2 increase photosynthetic rate.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- High CO 2 concentration(730 μl CO 2/L)e0
- Outcome
- photosynthetic ratee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High CO 2 concentration(730 μl CO 2/L) can increase photosynthetic rate(Fig.4) and decrease transpiration rate(E), so improve water use efficiency(WUE) greatly”
t0“Setaria italica”
Claim · model-written summary
High CO2 decrease transpiration rate.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- High CO 2 concentration(730 μl CO 2/L)e0
- Outcome
- transpiration ratee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High CO 2 concentration(730 μl CO 2/L) can increase photosynthetic rate(Fig.4) and decrease transpiration rate(E), so improve water use efficiency(WUE) greatly”
t0“Setaria italica”
Claim · model-written summary
High CO2 improve water use efficiency.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- High CO 2 concentration(730 μl CO 2/L)e0
- Outcome
- water use efficiencye0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High CO 2 concentration(730 μl CO 2/L) can increase photosynthetic rate(Fig.4) and decrease transpiration rate(E), so improve water use efficiency(WUE) greatly”
t0“Setaria italica”
Claim · model-written summary
Low humidity decrease photosynthetic rate.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- Low relative humidity(5%RH)e0
- Outcome
- photosynthetic ratee0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low relative humidity(5%RH) can decrease photosynthetic rate(P n), but improve WUE too”
t0“Setaria italica”
Claim · model-written summary
Low humidity improve WUE.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- Low relative humidity(5%RH)e0
- Outcome
- WUEe0
- Direction
- improvee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low relative humidity(5%RH) can decrease photosynthetic rate(P n), but improve WUE too”
t0“Setaria italica”
Claim · model-written summary
Low humidity reduced stomatal aperture, with transpiration more dependent on stomata than photosynthesis.
- Taxon
- Setaria italicaSetaria italicat0
- Outcome
- stomatal aperturee0
- Qualifier
- E is more dependent on the stomata than P ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low RH decease stomatal aperture and the E is more dependent on the stomata than P n”
t0“Setaria italica”
Claim · model-written summary
Heat girdling and assimilate accumulation decreased P n.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- heat girdling of leaf sheathe0
- Outcome
- P ne0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assimilate accumulation(heat girdling of leaf sheath) could decrease P n and WUE(Table 1)”
t0“Setaria italica”
Claim · model-written summary
Heat girdling and assimilate accumulation decreased WUE.
- Taxon
- Setaria italicaSetaria italicat0
- Treatment
- heat girdling of leaf sheathe0
- Outcome
- WUEe0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“assimilate accumulation(heat girdling of leaf sheath) could decrease P n and WUE(Table 1)”
t0“Setaria italica”
The same questions in other papers
co2 · physiology: gas exchange · Setaria italica (foxtail millet)Results differ
1 paper in the same direction as this paper
- positive
co2 · physiology: water · Setaria italica (foxtail millet)Positive and negative results
1 in the opposite direction
- no effect
co2 · physiology: photosynthesis · Setaria italica (foxtail millet)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.