Abstract
Using an open and a closed system of gas analysis, it was found that CO(2) evolution in light and in darkness from plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean) have a different response to temperature. While the rate of CO(2) evolution in light increased with increasing temperature from 17 to 35 degrees and then declined, the rate of CO(2) evolution in darkness increased continuously up to 40 degrees . The rate of CO(2) evolution in light was affected by light intensity. At 1800 ft-c and below 35 degrees the rate of CO(2) evolution in light was greater than in darkness, but above 35 degrees it became lower than in darkness. The Q(10) for CO(2) evolution in light was consistently lower than that in darkness.Apparent photosynthesis decreased with increasing temperature, from 20 to 40 degrees and its rate was affected by both light intensity and oxygen concentration. In leaves of dicotyledonous plants studied the decrease in apparent photosynthesis between 20 to 30 degrees at 21% O(2) was shown to be due primarily to an increase in CO(2) evolution in light with relatively little effect on photosynthesis.In corn which does not evolve CO(2) during illumination there was little effect of increasing temperature on the rate of apparent photosynthesis.The different response to temperature of CO(2) evolution in light and in darkness support the earlier conclusion that these are 2 different processes.
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 13
Claim · model-written summary
Light and dark CO2 evolution in leaves differed in temperature response.
- Taxon
- sunflower
Helianthus annuuse0 - Organ / stage
- plant leavese0
- Outcome
- CO(2) evolution in light and in darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO(2) evolution in light and in darkness from plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean) have a different response to temperature”
Claim · model-written summary
CO2 evolution in light rose from 17 to 35 degrees and then declined.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- increasing temperature from 17 to 35 degreese0
- Outcome
- rate of CO(2) evolution in lighte0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of CO(2) evolution in light increased with increasing temperature from 17 to 35 degrees and then declined”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
CO2 evolution in darkness increased continuously up to 40 degrees.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- 40 degreese0
- Outcome
- rate of CO(2) evolution in darknesse0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of CO(2) evolution in darkness increased continuously up to 40 degrees”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Light intensity affected CO2 evolution in light.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- light intensitye0
- Outcome
- rate of CO(2) evolution in lighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of CO(2) evolution in light was affected by light intensity”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Below 35 degrees at 1800 ft-c, CO2 evolution was greater in light than darkness.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- rate of CO(2) evolution in lighte0
- Direction
- greatere0
- Qualifier
- 1800 ft-c and below 35 degreese0
- Comparator
- darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 1800 ft-c and below 35 degrees the rate of CO(2) evolution in light was greater than in darkness, but above 35 degrees it became lower than in darkness”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Above 35 degrees at 1800 ft-c, CO2 evolution was lower in light than darkness.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- rate of CO(2) evolution in lighte0
- Direction
- lowere0
- Qualifier
- above 35 degreese0
- Comparator
- darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At 1800 ft-c and below 35 degrees the rate of CO(2) evolution in light was greater than in darkness, but above 35 degrees it became lower than in darkness”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
The Q(10) for light CO2 evolution was lower than for dark CO2 evolution.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- Q(10) for CO(2) evolution in lighte0
- Direction
- lowere0
- Comparator
- that in darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Q(10) for CO(2) evolution in light was consistently lower than that in darkness”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Apparent photosynthesis decreased as temperature rose from 20 to 40 degrees.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- increasing temperature, from 20 to 40 degreese0
- Outcome
- Apparent photosynthesise0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent photosynthesis decreased with increasing temperature, from 20 to 40 degrees and its rate was affected by both light intensity and oxygen concentration”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Apparent photosynthesis was affected by light intensity.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- light intensitye0
- Outcome
- ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent photosynthesis decreased with increasing temperature, from 20 to 40 degrees and its rate was affected by both light intensity and oxygen concentration”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Apparent photosynthesis was affected by oxygen concentration.
- Taxon
- sunflowerHelianthus annuust0
- Treatment
- oxygen concentratione0
- Outcome
- ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Apparent photosynthesis decreased with increasing temperature, from 20 to 40 degrees and its rate was affected by both light intensity and oxygen concentration”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”
Claim · model-written summary
Between 20 and 30 degrees at 21% oxygen, increased light CO2 evolution primarily explained the decrease in apparent photosynthesis in dicot leaves.
Verbatim
e0“In leaves of dicotyledonous plants studied the decrease in apparent photosynthesis between 20 to 30 degrees at 21% O(2) was shown to be due primarily to an increase in CO(2) evolution in light with relatively little effect on photosynthesis”
Claim · model-written summary
Corn had little temperature effect on apparent photosynthesis.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- increasing temperaturee0
- Outcome
- rate of apparent photosynthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In corn which does not evolve CO(2) during illumination there was little effect of increasing temperature on the rate of apparent photosynthesis”
Claim · model-written summary
The differing temperature responses support light and dark CO2 evolution as two distinct processes.
- Taxon
- sunflowerHelianthus annuust0
- Outcome
- 2 different processese0
- Qualifier
- different response to temperature of CO(2) evolution in light and in darknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The different response to temperature of CO(2) evolution in light and in darkness support the earlier conclusion that these are 2 different processes”
t0“plant leaves (sunflower, soybean, watermelon, eggplant, and jackbean)”