Abstract
High temperature reduces fruit set in bell pepper [ Capsicum annuum L. var. annuum (Grossum Group)], and reduction of pepper productivity, resulting from high temperature, may be a direct effect of temperature or an indirect effect of water stress induced by increased vapor pressure deficits (VPDs) at high temperature. We evaluated responses of plant growth, reproduction, net photosynthesis (P N ), chlorophyll fluorescence, predawn respiration, leaf water potential, and stomatal conductance of `Ace' and `Bell Boy' bell pepper to elevated temperature (33 °C) with increased VPD (2.1 kPa) or elevated temperature with no increase in VPD (1.1 kPa). VPD had no effect on flower number or fruit set and did not adversely influence the physiological processes measured. Therefore, deleterious effects of high temperature on pepper fruit set does not appear to be temperature induced water stress, but is more likely a direct temperature response. Elevated temperature decreased fruit set but not flower production. Gas exchange measurements suggest failure to set fruit was not due to reduced leaf photosynthesis.
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Claims 7
Claim · model-written summary
Increased VPD did not affect flower number.
Not reportedComparator
Verbatim
e0“VPD had no effect on flower number or fruit set and did not adversely influence the physiological processes measured”
t0“Bell Pepper”
Claim · model-written summary
Increased VPD did not affect fruit set.
Not reportedComparator
Verbatim
e0“VPD had no effect on flower number or fruit set and did not adversely influence the physiological processes measured”
t0“Bell Pepper”
Claim · model-written summary
Increased VPD did not adversely influence measured physiological processes.
- Taxon
- bell peppert0
- Treatment
- VPDe0
- Outcome
- physiological processes measurede0
- Direction
- did not adversely influencee0
Not reportedComparator
Verbatim
e0“VPD had no effect on flower number or fruit set and did not adversely influence the physiological processes measured”
t0“Bell Pepper”
Claim · model-written summary
Elevated temperature decreased fruit set.
Not reportedComparator
Verbatim
e0“Elevated temperature decreased fruit set but not flower production”
t0“Bell Pepper”
Claim · model-written summary
Elevated temperature did not decrease flower production.
Not reportedComparator
Verbatim
e0“Elevated temperature decreased fruit set but not flower production”
t0“Bell Pepper”
Claim · model-written summary
Authors inferred heat effects on fruit set were a direct temperature response.
- Taxon
- peppere0
- Treatment
- high temperaturee0
- Outcome
- pepper fruit sete0
- Qualifier
- more likely a direct temperature responsee0
Not reportedDirection
Verbatim
e0“deleterious effects of high temperature on pepper fruit set does not appear to be temperature induced water stress, but is more likely a direct temperature response”
Claim · model-written summary
Gas exchange suggested fruit set failure was not due to reduced leaf photosynthesis.
Not reportedDirection
Verbatim
e0“failure to set fruit was not due to reduced leaf photosynthesis”
t0“Bell Pepper”
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See all 9 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.