Abstract
Water stress is a major limiting factor affecting the physiological processes, growth, and productivity of crop plants, including chili. This study evaluated chili plants' responses regarding physiological traits, growth, yield, and capsaicin content under different irrigation levels. The experimental design was a 2x4 factorial in CBD. A pot experiment was conducted on two species of chilies: Capsicum annuum ‘Super-Hot 2’ and ‘Huay-Siiton’ and C. frutescent ‘Prik-Kee-Nu-Suan.’ The plants were irrigated at four watering regimes such as 100%, 80%, 60%, and 40% of maximum water holding capacity (MWHC) after the anthesis through fruit development. Midday leaf water potential (LWPmd) was ranked between -1.30 MPa in 100% MWHC to -2.11 MPa in 40% MWHC indicating the level of water stress. The 40% MWHC caused a drastic decrease in LWPmd and reduced the maximum quantum yield of PSII (Fv/Fm) and growth rate in canopy width. Observed leaf greenness was maximized at 60% MWHC. The irrigation regimes also affected the yield of chili, especially the 60% and 40% MWHC, with a reduced number of fruits/plant, fruit fresh and dry weights, and fruit sizes. In the case of 40% MWHC, the dry yield was too low, and it was impossible to analyze the capsaicin content. The reduced irrigation (80% and 60% MWHC) did not significantly induce the capsaicin content or pungency of the studied chili cultivars. Thus the capsaicin yield of studied chili cultivars was reduced considerably by severe reduction of dry fruit yield under restricted water.
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Claims 9
Claim · model-written summary
The 40% MWHC watering regime drastically decreased midday leaf water potential compared with 100% MWHC.
- Taxon
- Capsicum annuum
Capsicum annuume0 - Treatment
- 40% MWHCe2
- Outcome
- LWPmde2
- Direction
- decreasee2
- Value
- -2.11 MPae1
- Comparator
- 100% MWHCe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e1“Midday leaf water potential (LWPmd) was ranked between -1.30 MPa in 100% MWHC to -2.11 MPa in 40% MWHC indicating the level of water stress”
e2“The 40% MWHC caused a drastic decrease in LWPmd and reduced the maximum quantum yield of PSII (Fv/Fm) and growth rate in canopy width”
Claim · model-written summary
The 40% MWHC watering regime reduced the maximum quantum yield of PSII (Fv/Fm) in chili.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 40% MWHCe2
- Outcome
- maximum quantum yield of PSII (Fv/Fm)e2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e2“The 40% MWHC caused a drastic decrease in LWPmd and reduced the maximum quantum yield of PSII (Fv/Fm) and growth rate in canopy width”
Claim · model-written summary
The 40% MWHC watering regime reduced growth rate in canopy width of chili.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 40% MWHCe2
- Outcome
- growth rate in canopy widthe2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e2“The 40% MWHC caused a drastic decrease in LWPmd and reduced the maximum quantum yield of PSII (Fv/Fm) and growth rate in canopy width”
Claim · model-written summary
Observed leaf greenness was maximized at 60% MWHC.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 60% MWHCe3
- Outcome
- leaf greennesse3
- Direction
- maximizede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e3“Observed leaf greenness was maximized at 60% MWHC.”
Claim · model-written summary
Irrigation at 60% and 40% MWHC reduced the number of fruits per plant, fruit fresh weight and fruit dry weight of chili.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 60% and 40% MWHCe4
- Outcome
- number of fruits/plant, fruit fresh and dry weightse4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e4“The irrigation regimes also affected the yield of chili, especially the 60% and 40% MWHC, with a reduced number of fruits/plant, fruit fresh and dry weights, and fruit sizes.”
Claim · model-written summary
Irrigation at 60% and 40% MWHC reduced fruit size of chili.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 60% and 40% MWHCe4
- Outcome
- fruit sizese4
- Direction
- reducede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e4“The irrigation regimes also affected the yield of chili, especially the 60% and 40% MWHC, with a reduced number of fruits/plant, fruit fresh and dry weights, and fruit sizes.”
Claim · model-written summary
At 40% MWHC the dry yield of chili was too low for analysis.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- 40% MWHCe5
- Outcome
- dry yielde5
- Direction
- too lowe5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e5“In the case of 40% MWHC, the dry yield was too low, and it was impossible to analyze the capsaicin content.”
Claim · model-written summary
Reduced irrigation at 80% and 60% MWHC did not significantly induce capsaicin content or pungency of the chili cultivars.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- reduced irrigation (80% and 60% MWHC)e6
- Outcome
- capsaicin content or pungencye6
- Direction
- did not significantly inducee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e6“The reduced irrigation (80% and 60% MWHC) did not significantly induce the capsaicin content or pungency of the studied chili cultivars.”
Claim · model-written summary
Capsaicin yield of chili was reduced under restricted water through a severe reduction of dry fruit yield.
- Taxon
- Capsicum annuumCapsicum annuume0
- Treatment
- restricted watere7
- Outcome
- capsaicin yielde7
- Direction
- reducede7
- Qualifier
- severe reduction of dry fruit yielde7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A pot experiment was conducted on two species of chilies: Capsicum annuum”
e7“Thus the capsaicin yield of studied chili cultivars was reduced considerably by severe reduction of dry fruit yield under restricted water.”
The same questions in other papers
irrigation · quality: phytochemicals · Capsicum annuum (sweet pepper)Positive and negative results
6 in the opposite direction
- positive
- positive
- positive
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.