Abstract
The yield of groundnut ( Arachis hypogaea L.) grown in West African environments is often limited by high temperatures. We tested whether or not differences in the tolerance of groundnut genotypes to high temperature episodes are due to genotypic differences in the rates of dry matter partitioning to yield. A high temperature tolerant (HIT) and a high temperature sensitive (HTS) genotype were grown in a polyethylene‐covered greenhouse (polytunnel) at 30/25°C (day/night) until after the start of pegging (49 d after planting, DAP). Then, cohorts of each genotype were exposed for 6 d to four different constant day temperatures between 30 and 50°C before returning to the common environment until harvest maturity (98 DAP). Total plant biomass and seed yield at 98 DAP were reduced by the hottest temperature episodes and were less in the HTS compared with the HIT genotype. Proportional reduction in biomass and seed yield due to high temperature stress was greater in the HTS than the HTT genotype. The root/total biomass ratio declined more rapidly after flowering in the HTS compared with the HTT genotype. The start of seed‐filling was delayed by progressively hotter temperature episodes and was 11.7 d later in the HTS than the HTT genotype. However, the rate of increase in seed harvest index during seed filling was 0.0068 d −1 for both genotypes and was not affected by high temperature stress. We conclude that genotypic differences in the response of groundnut yield to episodes of high temperature stress were due to differences in the timing of seed filling rather than to genotypic differences in the rate of dry matter partitioning to fruits.
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Claims 9
Claim · model-written summary
The hottest temperature episodes reduced groundnut total biomass.
- Taxon
- groundnut
Arachis hypogaeae1 - Treatment
- hottest temperature episodese0
- Outcome
- Total plant biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total plant biomass and seed yield at 98 DAP were reduced by the hottest temperature episodes”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
The hottest temperature episodes reduced groundnut seed yield.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- hottest temperature episodese0
- Outcome
- seed yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total plant biomass and seed yield at 98 DAP were reduced by the hottest temperature episodes”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
The heat-sensitive genotype had less biomass and seed yield than the heat-tolerant genotype.
- Taxon
- groundnutArachis hypogaeae2
- Material
- HTSe0
- Outcome
- Total plant biomass and seed yielde1
- Direction
- lesse0
- Comparator
- HIT genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“were less in the HTS compared with the HIT genotype”
e1“Total plant biomass and seed yield at 98 DAP”
e2“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
Proportional biomass reduction under heat stress was greater in HTS than HTT groundnut.
- Taxon
- groundnutArachis hypogaeae1
- Material
- HTSe0
- Treatment
- high temperature stresse0
- Outcome
- biomasse0
- Direction
- greatere0
- Comparator
- HTT genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proportional reduction in biomass and seed yield due to high temperature stress was greater in the HTS than the HTT genotype.”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
Proportional seed-yield reduction under heat stress was greater in HTS than HTT groundnut.
- Taxon
- groundnutArachis hypogaeae1
- Material
- HTSe0
- Treatment
- high temperature stresse0
- Outcome
- seed yielde0
- Direction
- greatere0
- Comparator
- HTT genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proportional reduction in biomass and seed yield due to high temperature stress was greater in the HTS than the HTT genotype.”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
The root-to-total-biomass ratio declined faster after flowering in HTS than HTT groundnut.
- Taxon
- groundnutArachis hypogaeae1
- Material
- HTSe0
- Organ / stage
- after floweringe0
- Outcome
- root/total biomass ratioe0
- Direction
- declined more rapidlye0
- Comparator
- HTT genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The root/total biomass ratio declined more rapidly after flowering in the HTS compared with the HTT genotype.”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
Hotter temperature episodes progressively delayed the start of groundnut seed filling.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- progressively hotter temperature episodese0
- Outcome
- start of seed‐fillinge0
- Direction
- delayede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The start of seed‐filling was delayed by progressively hotter temperature episodes”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
Groundnut seed filling started 11.7 days later in HTS than HTT.
- Taxon
- groundnutArachis hypogaeae2
- Material
- HTSe0
- Outcome
- start of seed‐fillinge1
- Direction
- latere0
- Value
- 11.7 de0
- Comparator
- HTT genotypee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was 11.7 d later in the HTS than the HTT genotype.”
e1“The start of seed‐filling”
e2“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
Claim · model-written summary
The seed harvest index increased at 0.0068 d −1 in both genotypes and was unaffected by heat stress.
- Taxon
- groundnutArachis hypogaeae1
- Treatment
- high temperature stresse0
- Outcome
- rate of increase in seed harvest indexe0
- Direction
- not affectede0
- Value
- 0.0068 d −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rate of increase in seed harvest index during seed filling was 0.0068 d −1 for both genotypes and was not affected by high temperature stress.”
e1“Dry Matter Partitioning in Groundnut Exposed to High Temperature Stress”
The same questions in other papers
heat · yield · Arachis hypogaea (peanut)Positive and negative results
4 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- negative
3 papers more in this group
See all 7 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.