Abstract
Peanut production faces many challenges in the world today, and one such issue is heat stress. One of the implications of heat stress on the plants is oxidative stress, which is detrimental to plant health and physiological function. A method to combat oxidative stress could be through the use of antioxidants such as Selenium (Se), which is thought to increase growth and development of plant material. This experiment evaluated tolerance to heat stress in four-week-old seedlings from a set of diverse peanut genotypes. Additionally, the antioxidant activity of Selenium was examined to determine if a) it allowed for increased heat tolerance, and b) if it was associated with specific genotypes. At the conclusion of the treatments, SPAD chlorophyll measurements and fresh-weights were taken, with dry-weights being calculated after seedlings were oven-dried at 80˚C for 48 hours. The experiment concluded that Se did not produce a significant change in tolerance to heat stress. Genotype had a significant effect on SPAD chlorophyll readings and dry-weight. Additionally, temperature did not have a significant effect on dry-weight, but did on SPAD chlorophyll readings and fresh-weight. The effect of temperature on SPAD readings is of interest as the above optimal temperature of 39˚C produced higher relative chlorophyll contents than the 26˚C normal temperature. Due to this result, seedling total leaf area (LA) was further measured to determine if a potential trend could exist. Even though not statistically significant, LA was slightly smaller for seedlings at 39˚C treatment compared to the 26˚C treatment. In summary, the experiment did not discover genotypes that allowed for a significant improvement in tolerance to above-optimal temperatures or validate Se as an additive for increased tolerance to heat stress and improved seedling growth. However, it did demonstrate the ability of peanut seedlings to withstand an increase in temperature at an early stage without significant detrimental impacts.
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Claims 10
Claim · model-written summary
Selenium did not significantly change peanut seedling heat tolerance.
- Taxon
- Peanut
Arachis hypogaeat0 - Treatment
- See0
- Outcome
- tolerance to heat stresse0
- Direction
- did not produce a significant changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Se did not produce a significant change in tolerance to heat stress.”
t0“Peanut Seedlings”
Claim · model-written summary
Genotype significantly affected peanut seedling SPAD chlorophyll readings.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Genotypee0
- Outcome
- SPAD chlorophyll readingse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotype had a significant effect on SPAD chlorophyll readings and dry-weight.”
t0“Peanut Seedlings”
Claim · model-written summary
Genotype significantly affected peanut seedling dry weight.
- Taxon
- PeanutArachis hypogaeat0
- Material
- Genotypee0
- Outcome
- dry-weighte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotype had a significant effect on SPAD chlorophyll readings and dry-weight.”
t0“Peanut Seedlings”
Claim · model-written summary
Temperature did not significantly affect peanut seedling dry weight.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- temperaturee0
- Outcome
- dry-weighte0
- Direction
- did not have a significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature did not have a significant effect on dry-weight”
t0“Peanut Seedlings”
Claim · model-written summary
Temperature significantly affected peanut seedling SPAD chlorophyll readings.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- temperaturee0
- Outcome
- SPAD chlorophyll readingse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature did not have a significant effect on dry-weight, but did on SPAD chlorophyll readings and fresh-weight.”
t0“Peanut Seedlings”
Claim · model-written summary
Temperature significantly affected peanut seedling fresh weight.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- temperaturee0
- Outcome
- fresh-weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“temperature did not have a significant effect on dry-weight, but did on SPAD chlorophyll readings and fresh-weight.”
t0“Peanut Seedlings”
Claim · model-written summary
Peanut seedlings at 39˚C had higher relative chlorophyll than seedlings at 26˚C.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- 39˚Ce0
- Outcome
- relative chlorophyll contentse0
- Direction
- highere0
- Comparator
- 26˚Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“above optimal temperature of 39˚C produced higher relative chlorophyll contents than the 26˚C normal temperature.”
t0“Peanut Seedlings”
Claim · model-written summary
Peanut seedlings at 39˚C had slightly smaller leaf area than those at 26˚C, without statistical significance.
- Taxon
- PeanutArachis hypogaeat0
- Treatment
- 39˚C treatmente0
- Outcome
- LAe0
- Direction
- slightly smallere0
- Comparator
- 26˚C treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Even though not statistically significant, LA was slightly smaller for seedlings at 39˚C treatment compared to the 26˚C treatment.”
t0“Peanut Seedlings”
Claim · model-written summary
No genotype significantly improved peanut seedling tolerance to above-optimal temperatures.
- Taxon
- PeanutArachis hypogaeat0
- Material
- genotypese0
- Outcome
- tolerance to above-optimal temperaturese0
- Direction
- did not discovere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the experiment did not discover genotypes that allowed for a significant improvement in tolerance to above-optimal temperatures”
t0“Peanut Seedlings”
Claim · model-written summary
The authors concluded that peanut seedlings withstood higher temperature early in development without significant harm.
- Taxon
- peanutArachis hypogaeae0
- Organ / stage
- seedlingse0
- Outcome
- without significant detrimental impactse0
- Qualifier
- at an early stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“peanut seedlings to withstand an increase in temperature at an early stage without significant detrimental impacts.”
The same questions in other papers
selenium atom · disease · Arachis hypogaea (peanut)Positive and negative results
1 in the opposite direction
- 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.