Abstract
Leaf is a sensitive plant organ in responding to abiotic stresses, especially drought stress. Objective of this research was to evaluate changes of relative leaf expansion rate (RLER) and other leaf-related indicators as affected by gradual drought stress. The stress was induced by withholding water supply to chili pepper (Capsicum annum L.) for up to 12 days. Afterward, the crops were allowed to recover. The research was conducted in two stages. The first stage was for finding a reliable leaf area (LA) estimation model. The second stage was for evaluating relevance of RLER, specific leaf fresh weight (SLFW), specific leaf water content (SLWC), and total leaf area (TLA) as indicators for drought stress in chili pepper. Combinations of five regression models (linear, zero-intercept linear, quadratic, zero-intercept quadratic, and power) and three predictors, i.e. leaf length (L), leaf width (W), and LW were evaluated as candidates of LA estimation model. Selection of the models was based on coefficient of determination (R 2 ) and geometrical principles. The selected model was used for calculating RLER, SLFW, SLWC and TLA. Results of this study indicated that dynamic changes of RLER were mainly driven by daily day-night cycle rather than long-term gradual drought stress. SLFW and SLWC did not significantly decrease during drought stress period. However, drought stress significantly inhibited TLA in chili pepper. Chili pepper was able to recover from short-term (4 days) exposure to drought stress; yet, this crop was unable to recover after 8 days exposure to drought stress or longer.
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Claims 6
Claim · model-written summary
Relative leaf expansion rate varied mainly with the day-night cycle rather than gradual drought.
- Outcome
- dynamic changes of RLERe0
- Qualifier
- daily day-night cycle rather than long-term gradual drought stresse0
CapsicumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“Results of this study indicated that dynamic changes of RLER were mainly driven by daily day-night cycle rather than long-term gradual drought stress.”
Claim · model-written summary
Specific leaf fresh weight did not significantly decrease during drought stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“SLFW and SLWC did not significantly decrease during drought stress period.”
Claim · model-written summary
Specific leaf water content did not significantly decrease during drought stress.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“SLFW and SLWC did not significantly decrease during drought stress period.”
Claim · model-written summary
Drought stress significantly inhibited total leaf area.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“However, drought stress significantly inhibited TLA in chili pepper.”
Claim · model-written summary
Chili pepper recovered after four days of drought stress.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“Chili pepper was able to recover from short-term (4 days) exposure to drought stress; yet, this crop was unable to recover after 8 days exposure to drought stress or longer.”
Claim · model-written summary
Chili pepper did not recover after eight days or longer of drought stress.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“chili pepper (Capsicum annuum L.)”
e0“Chili pepper was able to recover from short-term (4 days) exposure to drought stress; yet, this crop was unable to recover after 8 days exposure to drought stress or longer.”
The same questions in other papers
drought · growth · Capsicum (peppers)Positive and negative results
5 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
5 papers more in this group
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.