Abstract
Abstract Under rainfed conditions, plant establishment is often low in cotton ( Gossypium hirsutum L.) because of water limitations. Increasing drought resistance of cotton seedlings by accelerating root growth thus has important, practical implications. Much research has been devoted to modifying plant root systems for more effective use of soil water, but successful results are few. We studied the effects of mepiquat chloride (MC; 1,1‐dimethylpiperidinium chloride) on drought resistance of cotton seedlings. Well‐watered seedlings were irrigated with mepiquat chloride (0‐40 mg kg −1 ), and then subjected to progressively greater water stress. Treatment with MC accelerated root growth and increased water absorption, especially at greater soil depths. The seedlings treated with MC were turgid longer and wilted less than the drought controls. In another series of experiments seeds were treated (0‐4000 mg kg −1 ) and arising plants were assessed for growth and survival in both well‐watered and water‐stress conditions. A seed treatment of 500 mg kg −1 gave shorter and more compact shoots, did not affect leaf area, but increased specific leaf weight and chlorophyll content. Seed treatment with 500 mg kg −1 MC also gave the greatest enhancement of root growth, water extraction from deep soil layers, and survival of stressed seedlings. These results suggested a potential for using MC to modify root patterns and increase drought resistance of cotton seedlings. Field tests of seed treatments with MC should be conducted to determine whether seedling survival is enhanced under natural drought‐stressed conditions. The responses of different cotton varieties to MC treatment also should be investigated.
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Claims 9
Claim · model-written summary
MC treatment accelerated root growth of cotton seedlings.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume0 - Treatment
- MCe1
- Outcome
- root growthe1
- Direction
- acceleratede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e1“Treatment with MC accelerated root growth and increased water absorption, especially at greater soil depths”
Claim · model-written summary
MC treatment increased water absorption by cotton seedlings, especially at greater soil depths.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- MCe1
- Outcome
- water absorptione1
- Direction
- increasede1
- Qualifier
- especially at greater soil depthse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e1“Treatment with MC accelerated root growth and increased water absorption, especially at greater soil depths”
Claim · model-written summary
MC-treated cotton seedlings stayed turgid longer than drought controls under water stress.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- MCe2
- Outcome
- turgide2
- Direction
- longere2
- Comparator
- drought controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e2“The seedlings treated with MC were turgid longer and wilted less than the drought controls”
Claim · model-written summary
MC-treated cotton seedlings wilted less than drought controls.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- MCe2
- Outcome
- wiltede2
- Direction
- lesse2
- Comparator
- drought controlse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e2“The seedlings treated with MC were turgid longer and wilted less than the drought controls”
Claim · model-written summary
Seed treatment with 500 mg kg −1 MC gave shorter and more compact cotton shoots.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- seed treatment of 500 mg kg −1e3
- Outcome
- shootse3
- Direction
- shorter and more compacte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e3“A seed treatment of 500 mg kg −1 gave shorter and more compact shoots, did not affect leaf area, but increased specific leaf weight and chlorophyll content”
Claim · model-written summary
Seed treatment with 500 mg kg −1 MC did not affect cotton leaf area.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- seed treatment of 500 mg kg −1e3
- Outcome
- leaf areae3
- Direction
- did not affecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e3“A seed treatment of 500 mg kg −1 gave shorter and more compact shoots, did not affect leaf area, but increased specific leaf weight and chlorophyll content”
Claim · model-written summary
Seed treatment with 500 mg kg −1 MC increased specific leaf weight and chlorophyll content of cotton.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- seed treatment of 500 mg kg −1e3
- Outcome
- specific leaf weight and chlorophyll contente3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e3“A seed treatment of 500 mg kg −1 gave shorter and more compact shoots, did not affect leaf area, but increased specific leaf weight and chlorophyll content”
Claim · model-written summary
Seed treatment with 500 mg kg −1 MC gave the greatest enhancement of root growth, water extraction from deep soil layers and survival of stressed cotton seedlings.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- 500 mg kg −1 MCe4
- Outcome
- root growth, water extraction from deep soil layers, and survival of stressed seedlingse4
- Direction
- greatest enhancemente4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e4“Seed treatment with 500 mg kg −1 MC also gave the greatest enhancement of root growth, water extraction from deep soil layers, and survival of stressed seedlings”
Claim · model-written summary
Using MC to modify root patterns and increase drought resistance of cotton seedlings is a potential approach.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Outcome
- increase drought resistance of cotton seedlingse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in cotton ( Gossypium hirsutum L.)”
e5“These results suggested a potential for using MC to modify root patterns and increase drought resistance of cotton seedlings”
The same questions in other papers
seed treatment · growth · Gossypium hirsutum (cotton)Positive and negative results
7 papers in the same direction as this paper · 39 in the opposite direction
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See all 47 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.