Abstract
Water deficit has been shown to decrease insect numbers in cotton, especially Lygus hesperus Knight and Heliothis spp. Condensed tannins have antibiotic activity and have been shown to decrease the feeding, growth rate, and survival of Heliothis spp. Condensed tannins are produced from various catechins, and their concentration has been reported to increase in some plants with various stresses, including drought. Therefore, we measured the catechin and tannin contents of leaves and 4‐day‐old bolls in cotton during irrigation cycles and after the final irrigation. We obtained no evidence that water deficit increases the concentration of extractable catechin or tannin in leaves or bolls. Therefore, other factors must be responsible for the suppression of insect activity in dryland cotton or in irrigated cotton during the dry part of the irrigation cycle. Partial defruiting did increase the catechin and tannin contents of leaves and bolls, suggesting that loss of fruit may cause biochemical changes that contribute to insect resistance.
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Claims 4
Claim · model-written summary
Water deficit did not increase the concentration of extractable catechin or tannin in cotton leaves or bolls.
- Taxon
- Cotton
Gossypium hirsutumt0 - Organ / stage
- leaves or bollse1
- Treatment
- water deficite1
- Outcome
- concentration of extractable catechin or tannine1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaves and Bolls of Cotton”
e1“We obtained no evidence that water deficit increases the concentration of extractable catechin or tannin in leaves or bolls”
Claim · model-written summary
Partial defruiting increased catechin and tannin contents of cotton leaves and bolls.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- leaves and bollse2
- Treatment
- Partial defruitinge2
- Outcome
- catechin and tannin contentse2
- Direction
- increasee2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaves and Bolls of Cotton”
e2“Partial defruiting did increase the catechin and tannin contents of leaves and bolls”
Claim · model-written summary
Loss of fruit may cause biochemical changes in cotton that contribute to insect resistance.
- Taxon
- CottonGossypium hirsutumt0
- Outcome
- insect resistancee3
- Qualifier
- loss of fruit may cause biochemical changese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Leaves and Bolls of Cotton”
e3“suggesting that loss of fruit may cause biochemical changes that contribute to insect resistance”
Claim · model-written summary
Other factors, not catechin or tannin, are responsible for the suppression of insect activity in cotton.
- Taxon
- cottonGossypium hirsutume4
- Outcome
- suppression of insect activitye4
- Qualifier
- other factorse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“other factors must be responsible for the suppression of insect activity in dryland cotton”
The same questions in other papers
drought · quality: phytochemicals · Gossypium hirsutum (cotton)Positive and negative results
3 papers in the same direction as this paper · 3 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.