Abstract
Short-term variations in temperature associated with climate change have been noted to affect the physiological processes and metabolite profile of plants, including the nutritional status, ultimately affecting their growth and development. An evaluation of the effects of elevated temperatures on the growth and nutritional quality of cowpea was performed during this experiment. The main objective was to evaluate the effects of short-term elevated temperatures on the nutritional quality of cowpea at different growth stages. Surface-sterilized seeds of cowpea (cv. Soronko) were germinated in pots in the glasshouse. At different growth stages (preflowering, flowering, and postflowering), plants were incubated in growth chambers set at three different temperature regimes (25, 30, and 35 °C) for a period of 7 days. Compared with control (25 °C), exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight by 30% and 52% and 42% and 29%, respectively, at the preflowering stage, and by 31 and 60% and 47 and 63%, respectively, at the flowering/anthesis stage. However, no significant difference in whole plant biomass was noted between elevated temperatures (35%) and the control temperature at the postflowering stage. Short-term exposure to an elevated temperature (35 °C) increased the shoot crude protein content (5.59 N%) of cowpea compared with control (3.77 N%) and preflowering stage. In contrast, at the flowering stage, an elevated temperature (35 °C) reduced the crude protein content (1.77%) of the shoot compared with control (5.59%). At an elevated temperature (35 °C), the preflowering and flowering stages of cowpea were most affected compared with control. These results suggest that the preflowering and flowering stages of cowpea compared with the postflowering stage are more susceptible to elevated temperatures (30 to 35 °C).
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Claims 9
Claim · model-written summary
At preflowering, 30 °C reduced fresh weight by 30%.
- Taxon
- cowpea
Vigna unguiculatat0 - Organ / stage
- preflowering stagee0
- Treatment
- 30e0
- Outcome
- whole plant fresh weighte0
- Direction
- reducede0
- Value
- 30%e0
- Comparator
- 25 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control (25 °C), exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight by 30% and 52% and 42% and 29%, respectively, at the preflowering stage”
t0“Cowpea”
Claim · model-written summary
At preflowering, 35 °C reduced fresh weight by 52%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 35 °Ce0
- Outcome
- whole plant fresh weighte0
- Direction
- reducede0
- Value
- 52%e0
- Comparator
- 25 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control (25 °C), exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight by 30% and 52% and 42% and 29%, respectively, at the preflowering stage”
t0“Cowpea”
Claim · model-written summary
At preflowering, 30 °C reduced dry weight by 42%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 30e0
- Outcome
- dry weighte0
- Direction
- reducede0
- Value
- 42%e0
- Comparator
- 25 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control (25 °C), exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight by 30% and 52% and 42% and 29%, respectively, at the preflowering stage”
t0“Cowpea”
Claim · model-written summary
At preflowering, 35 °C reduced dry weight by 29%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 35 °Ce0
- Outcome
- dry weighte0
- Direction
- reducede0
- Value
- 29%e0
- Comparator
- 25 °Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with control (25 °C), exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight by 30% and 52% and 42% and 29%, respectively, at the preflowering stage”
t0“Cowpea”
Claim · model-written summary
At flowering, elevated temperatures reduced fresh and dry weight.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- elevated temperaturese1
- Outcome
- fresh weight and dry weighte1
- Direction
- reducede1
- Value
- 31 and 60%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“by 31 and 60% and 47 and 63%, respectively, at the flowering/anthesis stage”
t0“Cowpea”
e1“exposure to both elevated temperatures (30 and 35 °C) reduced the whole plant fresh weight and dry weight”
Claim · model-written summary
Postflowering biomass did not significantly differ between high and control temperature.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- elevated temperatures (35%)e0
- Outcome
- whole plant biomasse0
- Direction
- no significant differencee0
- Comparator
- control temperaturee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant difference in whole plant biomass was noted between elevated temperatures (35%) and the control temperature at the postflowering stage”
t0“Cowpea”
Claim · model-written summary
At preflowering, 35 °C increased shoot crude protein to 5.59 N% versus 3.77 N%.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- 35 °Ce0
- Outcome
- shoot crude protein contente0
- Direction
- increasede0
- Value
- 5.59 N%e0
- Qualifier
- 3.77 N%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Short-term exposure to an elevated temperature (35 °C) increased the shoot crude protein content (5.59 N%) of cowpea compared with control (3.77 N%) and preflowering stage”
Claim · model-written summary
At flowering, 35 °C reduced shoot crude protein to 1.77% versus 5.59%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 35 °Ce0
- Outcome
- crude protein contente0
- Direction
- reducede0
- Value
- 1.77%e0
- Qualifier
- 5.59%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at the flowering stage, an elevated temperature (35 °C) reduced the crude protein content (1.77%) of the shoot compared with control (5.59%)”
t0“Cowpea”
Claim · model-written summary
Preflowering and flowering plants were more susceptible to heat than postflowering plants.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- more susceptible to elevated temperaturese0
- Comparator
- postflowering stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the preflowering and flowering stages of cowpea compared with the postflowering stage are more susceptible to elevated temperatures (30 to 35 °C)”
The same questions in other papers
heat · growth · Vigna unguiculata (cowpea)Positive and negative results
5 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
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4 papers more in this group
See all 8 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.