Abstract
Drought impacts cotton ( Gossypium hirsutum L.), affecting its physiological, morphological, and agronomic parameters. Ethylene, a growth hormone, can induce fruit abscission. Ethylene inhibitors, such as 1‐methylcyclopropene (1‐MCP), may minimize the loss of reproductive structures. The objective of this study was to examine the effects of 1‐MCP on gas exchange, plant growth/development, and yield components of cotton under drought during the reproductive phase. A 2‐yr greenhouse study was conducted as a 2 × 2 factorial design in a split‐block arrangement with five replications. Treatments were two 1‐MCP rates (0 and 2.4 g a.i. L −1 ) during a 14‐h overnight incubation that were then subjected to two water regimes (control and drought). Drought started to impact gas exchange at a moderate water stress, 5 DAT (days after 1‐MCP treatment) (–1.4 MPa). The 1‐MCP increased water use efficiency (WUE) in well‐watered plants at 1 DAT. Many of the yield components, plant mapping, and biomass parameters investigated were adversely affected by drought. However, drought increased specific leaf weight (SLW), chlorophyll (Chl) content, and harvest index. The 1‐MCP improved reproductive node numbers mainly during drought, but did not lead to a better harvest index, since 1‐MCP caused high fruit abscission. In conclusion, 1‐MCP did not ameliorate the detrimental effects of drought on gas exchange when water stress started to impact cotton plants. Additionally, 1‐MCP had little or no positive effect on plant mapping, dry matter partitioning, and Chl content.
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Claims 11
Claim · model-written summary
Drought affected cotton gas exchange by moderate stress at 5 DAT.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- Droughte0
- Outcome
- gas exchangee0
- Value
- –1.4 MPae0
- Qualifier
- 5 DATe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought started to impact gas exchange at a moderate water stress, 5 DAT (days after 1‐MCP treatment) (–1.4 MPa).”
t0“Cotton”
Claim · model-written summary
1-MCP increased water use efficiency in well-watered cotton at 1 DAT.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe0
- Outcome
- water use efficiency (WUE)e0
- Direction
- increasede0
- Qualifier
- well‐watered plants at 1 DATe0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1‐MCP increased water use efficiency (WUE) in well‐watered plants at 1 DAT.”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
Drought adversely affected cotton yield components, plant mapping and biomass traits.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- droughte0
- Outcome
- yield components, plant mapping, and biomass parameterse0
- Direction
- adversely affectede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Many of the yield components, plant mapping, and biomass parameters investigated were adversely affected by drought.”
t0“Cotton”
e1“water regimes (control and drought)”
Claim · model-written summary
Drought increased cotton specific leaf weight and chlorophyll content.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- droughte0
- Outcome
- specific leaf weight (SLW), chlorophyll (Chl) contente0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought increased specific leaf weight (SLW), chlorophyll (Chl) content, and harvest index.”
t0“Cotton”
e1“water regimes (control and drought)”
Claim · model-written summary
Drought increased cotton harvest index.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- droughte0
- Outcome
- harvest indexe0
- Direction
- increasede0
- Comparator
- controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drought increased specific leaf weight (SLW), chlorophyll (Chl) content, and harvest index.”
t0“Cotton”
e1“water regimes (control and drought)”
Claim · model-written summary
1-MCP improved cotton reproductive node numbers mainly during drought.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe0
- Outcome
- reproductive node numberse0
- Direction
- improvede0
- Qualifier
- mainly during droughte0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The 1‐MCP improved reproductive node numbers mainly during drought”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
1-MCP did not improve cotton harvest index.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe1
- Outcome
- harvest indexe0
- Direction
- did not lead to a bettere0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not lead to a better harvest index”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
1-MCP caused high cotton fruit abscission.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe0
- Outcome
- fruit abscissione0
- Direction
- highe0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1‐MCP caused high fruit abscission.”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
1-MCP did not ameliorate drought damage to cotton gas exchange.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 1‐MCPe0
- Outcome
- gas exchangee0
- Direction
- did not amelioratee0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1‐MCP did not ameliorate the detrimental effects of drought on gas exchange when water stress started to impact cotton plants.”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
1-MCP had little or no positive effect on cotton plant mapping and dry matter partitioning.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe0
- Outcome
- plant mapping, dry matter partitioninge0
- Direction
- little or no positive effecte0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1‐MCP had little or no positive effect on plant mapping, dry matter partitioning, and Chl content.”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
Claim · model-written summary
1-MCP had little or no positive effect on cotton chlorophyll content.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 1‐MCPe0
- Outcome
- Chl contente0
- Direction
- little or no positive effecte0
- Comparator
- 0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1‐MCP had little or no positive effect on plant mapping, dry matter partitioning, and Chl content.”
t0“Cotton”
e1“two 1‐MCP rates (0 and 2.4 g a.i. L −1 )”
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See all 82 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.