Abstract
Many environmental stress factors have been identified that increase square and boll abscission and thus result in reduced cotton (Gossypium hirsutum L.) yield. Under stress conditions, ethylene, an endogenous hormone, is elicited. Ethylene peaks before abscission to promote the formation of the abscission layer and plays a major role in early season square and boll abortion. In addition, ethylene stimulates the leaf senescence process. Thus, it is desirable to protect a crop from ethylene-induced fruit loss and premature leaf senescence under stress conditions. The overall objective of this study was to test the hypothesis that the ethylene inhibiting compound 1-methylcyclopropene (1-MCP) treatment can have a beneficial effect on the physiology, biochemistry and yield traits of cotton plants under abiotic stress conditions under field and controlled environment studies. The growth chamber studies were conducted in 2011 using a randomized complete design with six replications. Cotton plants were exposed to stress conditions (heat and drought) and 1-MCP treatment at the seven-true-leaf stage. The heat stress study consisted of two 1-MCP rates (0 and 10 g a.i. ha-1) and two temperature regimes (optimum temperature: 30/20 ºC (day/night temperature) and high temperature: 40/25 ºC). The drought study consisted of two water regimes (well-watered and water-stressed) was exposed to two rates of 1-MCP (0 and 10 g a.i. ha-1). Both of the field studies were conducted with a randomized complete block design with four replications in 2010 and 2011 at the Texas A&M AgriLIFE Research Farm in Burleson County, TX. The objective of the first field study was to evaluate the ability of 1-MCP to protect cotton plants against abiotic stress imposed by a foliar treatment of ethephon. Eight treatments consisted of two 1-MCP rates (0 and 10 g a.i. ha-1) in combination of four ethephon rates (0, 146, 292, and 438 mL ha-1) were imposed at the first flower (FF) stage of crop development. The second field study investigated the effect of 1-MCP on boll development and the corresponding subtending leaves, and consisted of two 1-MCP rates (0 and 10 g a.i. ha-1) applied at 20 days after flowering. In the growth chamber study examining heat and drought, application of 1-MCP resulted in reductions of lipid peroxidation, membrane leakage, and soluble sugar content as well as increased chlorophyll content, compared to the untreated plants under stress conditions. In the field study to evaluate the effect of 1-MCP under ethephon stress, 1-MCP increased plant height and number of main stem nodes in both years. In addition, 1-MCP treated plants exhibited greater membrane integrity and increased photosystem II quantum efficiency, and thus delayed senescence in both years. This potential for yield increase was realized in 2011 with 1-MCP treatment exhibiting a higher lint yield. In 2012, although 1-MCP treatment increased number of open fruit and open fruit weight per plant, no significant yield increase was detected. In the field study to test the effect of 1-MCP on boll development and subtending leaf conditions, 1-MCP treatment increased cotton boll weight at 20 days after flowering. One probable explanation for the enhanced boll size was the healthier subtending leaves: 1-MCP-treated subtending leaves exhibited decreased membrane damage and lipid peroxidation, and higher chlorophyll content and photosynthetic efficiency.
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Claims 13
Claim · model-written summary
1-MCP reduced lipid peroxidation, membrane leakage and soluble sugar content in cotton under heat and drought stress in the growth chamber.
- Taxon
- cotton
Gossypium hirsutumt0 - Treatment
- 1-MCPe0
- Outcome
- lipid peroxidation, membrane leakage, and soluble sugar contente0
- Direction
- reductionse0
- Qualifier
- heat and droughte0
- Comparator
- untreated plantse0
- Setting
- growth chambere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e0“In the growth chamber study examining heat and drought, application of 1-MCP resulted in reductions of lipid peroxidation, membrane leakage, and soluble sugar content as well as increased chlorophyll content, compared to the untreated plants under stress conditions”
Claim · model-written summary
1-MCP increased chlorophyll content in cotton under heat and drought stress in the growth chamber.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCPe0
- Outcome
- chlorophyll contente0
- Direction
- increasede0
- Qualifier
- heat and droughte0
- Comparator
- untreated plantse0
- Setting
- growth chambere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e0“In the growth chamber study examining heat and drought, application of 1-MCP resulted in reductions of lipid peroxidation, membrane leakage, and soluble sugar content as well as increased chlorophyll content, compared to the untreated plants under stress conditions”
Claim · model-written summary
1-MCP increased plant height and number of main stem nodes under ethephon stress in both years.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCPe1
- Outcome
- plant height and number of main stem nodese1
- Direction
- increasede1
- Qualifier
- under ethephon stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e1“In the field study to evaluate the effect of 1-MCP under ethephon stress, 1-MCP increased plant height and number of main stem nodes in both years”
Claim · model-written summary
1-MCP treated plants had greater membrane integrity.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treated plantse2
- Outcome
- membrane integritye2
- Direction
- greatere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e2“1-MCP treated plants exhibited greater membrane integrity and increased photosystem II quantum efficiency, and thus delayed senescence in both years”
Claim · model-written summary
1-MCP increased photosystem II quantum efficiency in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treated plantse2
- Outcome
- photosystem II quantum efficiencye2
- Direction
- increasede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e2“1-MCP treated plants exhibited greater membrane integrity and increased photosystem II quantum efficiency, and thus delayed senescence in both years”
Claim · model-written summary
1-MCP delayed senescence of cotton in both years.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treated plantse2
- Outcome
- senescencee2
- Direction
- delayede2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e2“1-MCP treated plants exhibited greater membrane integrity and increased photosystem II quantum efficiency, and thus delayed senescence in both years”
Claim · model-written summary
The 1-MCP treatment had a higher lint yield in 2011.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treatmente3
- Outcome
- lint yielde3
- Direction
- highere3
- Setting
- 2011e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e3“This potential for yield increase was realized in 2011 with 1-MCP treatment exhibiting a higher lint yield”
Claim · model-written summary
In 2012, 1-MCP increased the number of open fruit and open fruit weight per plant.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treatmente4
- Outcome
- number of open fruit and open fruit weight per plante4
- Direction
- increasede4
- Setting
- 2012e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e4“In 2012, although 1-MCP treatment increased number of open fruit and open fruit weight per plant, no significant yield increase was detected”
Claim · model-written summary
In 2012, no significant cotton yield increase was detected with 1-MCP.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treatmente4
- Outcome
- yielde4
- Direction
- no significant yield increasee4
- Setting
- 2012e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e4“In 2012, although 1-MCP treatment increased number of open fruit and open fruit weight per plant, no significant yield increase was detected”
Claim · model-written summary
1-MCP increased cotton boll weight at 20 days after flowering.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 1-MCP treatmente5
- Outcome
- cotton boll weighte5
- Direction
- increasede5
- Qualifier
- at 20 days after floweringe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e5“In the field study to test the effect of 1-MCP on boll development and subtending leaf conditions, 1-MCP treatment increased cotton boll weight at 20 days after flowering”
Claim · model-written summary
The enhanced boll size under 1-MCP is probably explained by healthier subtending leaves.
- Taxon
- cottonGossypium hirsutumt0
- Outcome
- enhanced boll sizee6
- Qualifier
- healthier subtending leavese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e6“One probable explanation for the enhanced boll size was the healthier subtending leaves: 1-MCP-treated subtending leaves exhibited decreased membrane damage and lipid peroxidation, and higher chlorophyll content and photosynthetic efficiency”
Claim · model-written summary
1-MCP-treated subtending leaves had decreased membrane damage and lipid peroxidation.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- subtending leavese6
- Treatment
- 1-MCP-treated subtending leavese6
- Outcome
- membrane damage and lipid peroxidatione6
- Direction
- decreasede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e6“One probable explanation for the enhanced boll size was the healthier subtending leaves: 1-MCP-treated subtending leaves exhibited decreased membrane damage and lipid peroxidation, and higher chlorophyll content and photosynthetic efficiency”
Claim · model-written summary
1-MCP-treated subtending leaves had higher chlorophyll content and photosynthetic efficiency.
- Taxon
- cottonGossypium hirsutumt0
- Organ / stage
- subtending leavese6
- Treatment
- 1-MCP-treated subtending leavese6
- Outcome
- higher chlorophyll content and photosynthetic efficiencye6
- Direction
- highere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Cotton Plants”
e6“One probable explanation for the enhanced boll size was the healthier subtending leaves: 1-MCP-treated subtending leaves exhibited decreased membrane damage and lipid peroxidation, and higher chlorophyll content and photosynthetic efficiency”
The same questions in other papers
1-methylcyclopropene · physiology: pigments · Gossypium hirsutum (cotton)Results differ
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
1-methylcyclopropene · physiology: oxidative · Gossypium hirsutum (cotton)Results differ
4 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
4 papers more in this group
See all 8 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.