Abstract
Ethylene is an endogenous plant hormone that increases under adverse environmental conditions, resulting in leaf and fruit abscission and ultimately yield reduction. In cotton, however, the effects of water-deficit stress on ethylene production have been uncertain. In this study it was hypothesized that application of an ethylene inhibitor 1-Methylcyclo- propene (1-MCP) would prevent ethylene production and result in alleviation of water-deficit stress consequences on the physiology and metabolism of the cotton flower and subtending leaf. To test this hypothesis, growth chamber experiments were conducted in 2009-2010 with treatments consisting of (C) untreated well-watered control, (C + 1MCP) well-watered plus 1-MCP, (WS) untreated water-stressed control, and (WS + 1MCP) water-stressed plus 1-MCP. The plants were subjected to two consecutive drying cycles during flowering, approximately 8 weeks after planting, and 1-MCP was foliar applied at a rate of 10g. ai/ha at the beginning of each drying cycle. The results showed that 1-MCP application had no significant effect on gas exchange functions and did not prevent reductions from water stress in leaf photosynthesis, respiration and stomatal conductance. However, application of 1-MCP resulted in a decrease in sucrose content of water-stressed pistils compared to the control indicating that 1-MCP has the potential to interfere in carbohydrate metabolism of reproductive units.
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Claims 3
Claim · model-written summary
1-MCP had no significant effect on cotton gas exchange functions.
- Taxon
- Cotton
Gossypium hirsutumt0 - Treatment
- 1-MCP applicatione0
- Outcome
- gas exchange functionse0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“1-MCP application had no significant effect on gas exchange functions”
t0“Cotton”
Claim · model-written summary
1-MCP did not prevent water-stress reductions in leaf photosynthesis, respiration and stomatal conductance.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- leafe0
- Outcome
- leaf photosynthesis, respiration and stomatal conductancee0
- Direction
- reductionse0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“did not prevent reductions from water stress in leaf photosynthesis, respiration and stomatal conductance.”
t0“Cotton”
Claim · model-written summary
1-MCP decreased sucrose content in water-stressed pistils compared with control.
- Taxon
- CottonGossypium hirsutumt0
- Organ / stage
- water-stressed pistilse0
- Treatment
- application of 1-MCPe0
- Outcome
- sucrose contente0
- Direction
- decreasee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of 1-MCP resulted in a decrease in sucrose content of water-stressed pistils compared to the control”
t0“Cotton”
The same questions in other papers
1-methylcyclopropene · physiology: gas exchange · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- no effect
- no effect
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.