Abstract
ABSTRACT Sesame plants are highly resistant. However, mechanical damage from hail, pest, and disease attacks, or machinery traffic, can cause a loss in leaf area, characterizing defoliation. In intensified production systems, where leaf area reduction may occur, the effects of defoliation are known for different crop species. For sesame, there are no studies on the response of these plants to defoliation in initial development stages. Thus, the objective of this research was to analyze the growth, photosynthetic efficiency (chlorophyll a fluorescence), root morphology, and grain yield of sesame subjected to defoliation. The experiment was carried out in 20-L pots, and the plants were subjected to two treatments: control (without defoliation) and defoliation. Defoliation was imposed 22 days after sowing. Plant height, stem diameter, and chlorophyll fluorescence were evaluated throughout the plant development. At physiological maturity, root morphology, and yield components were evaluated. Sesame plants under defoliation showed rapid recovery in diameter and height (34 and 50 days after defoliation, respectively). Although leaf area was reduced by defoliation, there were no changes in photosynthetic efficiency between treatments. The damage caused by defoliation caused an increase in root length and surface area and favored the increase in very thin and thin roots. Sesame plants subjected to defoliation resulted in shoot dry mass, grain yield, and harvest index similar to plants without mechanical damage. Early defoliation does not cause damage to sesame under the study conditions, generating possibilities for the future use of this crop in intensified production systems with this type of stress.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Defoliated sesame plants recovered stem diameter after 34 days.
- Taxon
- Sesame plants
Sesamum indicume0 - Treatment
- defoliatione0
- Outcome
- diametere0
- Direction
- rapid recoverye0
- Value
- 34e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sesame plants under defoliation showed rapid recovery in diameter and height (34 and 50 days after defoliation, respectively)”
Claim · model-written summary
Defoliated sesame plants recovered height after 50 days.
- Taxon
- Sesame plantsSesamum indicume0
- Treatment
- defoliatione0
- Outcome
- heighte0
- Direction
- rapid recoverye0
- Value
- 50 days after defoliatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sesame plants under defoliation showed rapid recovery in diameter and height (34 and 50 days after defoliation, respectively)”
Claim · model-written summary
Defoliation reduced sesame leaf area.
- Taxon
- Sesame plantsSesamum indicume1
- Treatment
- defoliatione0
- Outcome
- leaf areae0
- Direction
- reducede0
- Comparator
- control (without defoliation)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although leaf area was reduced by defoliation”
e1“Sesame plants under defoliation showed rapid recovery in diameter and height”
e2“control (without defoliation) and defoliation”
Claim · model-written summary
Photosynthetic efficiency did not change between defoliated and control sesame plants.
- Taxon
- Sesame plantsSesamum indicume1
- Treatment
- defoliatione2
- Outcome
- photosynthetic efficiencye0
- Direction
- no changese0
- Comparator
- control (without defoliation)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were no changes in photosynthetic efficiency between treatments”
e1“Sesame plants under defoliation showed rapid recovery in diameter and height”
e2“control (without defoliation) and defoliation”
Claim · model-written summary
Defoliation increased sesame root length and surface area.
- Taxon
- Sesame plantsSesamum indicume1
- Treatment
- defoliatione0
- Outcome
- root length and surface areae0
- Direction
- increasee0
- Comparator
- control (without defoliation)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The damage caused by defoliation caused an increase in root length and surface area”
e1“Sesame plants under defoliation showed rapid recovery in diameter and height”
e2“control (without defoliation) and defoliation”
Claim · model-written summary
Defoliation increased the proportion of very thin and thin sesame roots.
- Taxon
- Sesame plantsSesamum indicume1
- Treatment
- defoliatione2
- Outcome
- very thin and thin rootse0
- Direction
- increasee0
- Comparator
- control (without defoliation)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“favored the increase in very thin and thin roots”
e1“Sesame plants under defoliation showed rapid recovery in diameter and height”
e2“control (without defoliation) and defoliation”
Claim · model-written summary
Defoliated sesame had shoot dry mass, grain yield and harvest index similar to undamaged plants.
- Taxon
- Sesame plantsSesamum indicume0
- Treatment
- defoliatione0
- Outcome
- shoot dry mass, grain yield, and harvest indexe0
- Direction
- similare0
- Comparator
- plants without mechanical damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sesame plants subjected to defoliation resulted in shoot dry mass, grain yield, and harvest index similar to plants without mechanical damage”
Claim · model-written summary
The authors conclude that early defoliation does not damage sesame under the study conditions.
- Taxon
- sesameSesamum indicume0
- Outcome
- does not cause damagee0
- Qualifier
- under the study conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early defoliation does not cause damage to sesame under the study conditions”
The same questions in other papers
pruning · yield · Sesamum indicum (sesame)Results differ
1 paper in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
9 papers more in this group
See all 13 papers →pruning · physiology: photosynthesis · Sesamum indicum (sesame)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →pruning · growth · Sesamum indicum (sesame)Results agree
1 paper in the same direction as this paper
- positive
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.