Abstract
The peanut ( Arachis hypogaea L.) is under investigation for use in the National Aeronautics and Space Administration's Advanced Life Support (ALS) program as a food source for extended space missions. The objective of this study was an evaluation of the effect of a continuous light period combined with constant or diurnally cyded temperatures on pod and seed yield, plant biomass, harvest index, and gas exchange in ‘Georgia Red’ peanut grown hydroponically under the nutrient film technique. Experiments were conducted in controlled‐environment growth chambers. Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C. Relative humidity was 70 ± 5% and a photosynthetic photon flux (PPF) at canopy level of 250 or 500 μmol m −2 s −1 for 2410 h and 12/12‐h light periods, respectively. Plants exposed to 24/0 h light produced more foliage biomass, lower pod and mature seed yields, and lower harvest indices. Temperature had no significant effect on foliage biomass yield. However, plants exposed to diurnal 28/22°C produced higher pod and immature seed yield and a higher harvest index. The mean number of flowers reaching anthesis was higher among plants grown at a 12/12‐h light period, regardless of temperature. Leaf net photosynthetic rates and stomatal conductance were higher among plants grown at 12/12‐h light period, regardless of temperature. The results suggest that, while light period influenced, foliage, pod, and seed yield, temperature influenced foliage dry mass, immature seed yield, and harvest index.
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Claims 8
Claim · model-written summary
Peanut plants exposed to 24/0 h light produced more foliage biomass than under 12/12 h light.
- Taxon
- peanut
Arachis hypogaeae0 - Treatment
- 24/0 h lighte2
- Outcome
- foliage biomasse2
- Direction
- moree2
- Comparator
- 12/12 he1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e2“Plants exposed to 24/0 h light produced more foliage biomass, lower pod and mature seed yields, and lower harvest indices”
Claim · model-written summary
Peanut plants exposed to 24/0 h light had lower pod and mature seed yields than under 12/12 h light.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- 24/0 h lighte2
- Outcome
- pod and mature seed yieldse2
- Direction
- lowere2
- Comparator
- 12/12 he1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e2“Plants exposed to 24/0 h light produced more foliage biomass, lower pod and mature seed yields, and lower harvest indices”
Claim · model-written summary
Peanut plants exposed to 24/0 h light had lower harvest indices than under 12/12 h light.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- 24/0 h lighte2
- Outcome
- harvest indicese2
- Direction
- lowere2
- Comparator
- 12/12 he1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e2“Plants exposed to 24/0 h light produced more foliage biomass, lower pod and mature seed yields, and lower harvest indices”
Claim · model-written summary
Temperature had no significant effect on peanut foliage biomass yield.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- Temperaturee3
- Outcome
- foliage biomass yielde3
- Direction
- no significant effecte3
- Comparator
- constant 28e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e3“Temperature had no significant effect on foliage biomass yield”
Claim · model-written summary
Diurnal 28/22°C produced higher pod and immature seed yield than constant 28°C.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- diurnal 28/22°Ce4
- Outcome
- pod and immature seed yielde4
- Direction
- highere4
- Comparator
- constant 28e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e4“plants exposed to diurnal 28/22°C produced higher pod and immature seed yield”
Claim · model-written summary
Diurnal 28/22°C produced a higher harvest index than constant 28°C.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- diurnal 28/22°Ce5
- Outcome
- harvest indexe5
- Direction
- highere5
- Comparator
- constant 28e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e5“plants exposed to diurnal 28/22°C produced higher pod and immature seed yield and a higher harvest index”
Claim · model-written summary
Peanut plants grown at a 12/12 h light period had a higher mean number of flowers reaching anthesis than at 24/0 h, regardless of temperature.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- 12/12e6
- Outcome
- mean number of flowers reaching anthesise6
- Direction
- highere6
- Comparator
- 24/0 he1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e6“The mean number of flowers reaching anthesis was higher among plants grown at a 12/12”
Claim · model-written summary
Peanut plants grown at a 12/12 h light period had higher leaf net photosynthetic rates and stomatal conductance than at 24/0 h.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- 12/12e7
- Outcome
- Leaf net photosynthetic rates and stomatal conductancee7
- Direction
- highere7
- Comparator
- 24/0 he1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The peanut ( Arachis hypogaea L.) is under investigation”
e1“Treatments were light/ dark periods of 12/12 h or 24/0 h in combination with a constant 28 or 28/22°C”
e7“Leaf net photosynthetic rates and stomatal conductance were higher among plants grown at 12/12”
The same questions in other papers
light · yield · Arachis hypogaea (peanut)Positive and negative results
9 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
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14 papers more in this group
See all 18 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.