Abstract
Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings wilted when entire plants or roots alone were chilled in the light. The water relations and gas exchange characteristics of these chilling-sensitive species have been compared with a chilling-resistant species, collard (Brassica oleracea), following exposure to a chilling temperature at 5°C. Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings but induced a rapid response in cotton and bean. Leaf water potentials were reduced below - 1.5 MPa within 1-2 h; however, this response was reduced when seedlings were chilled in the dark or when leaves or roots of bean were pretreated with abscisic acid. Chilling also caused a rapid reduction in photosynthesis but a more gradual decline in transpiration over the first 2-4 h due to the slow closure of stomata. These results suggest that water deficits in chilling-sensitive seedlings when exposed to low temperature in the light are caused by a reduction in the hydraulic conductivity of the root membranes and by the loss of stomatal control in the leaves. The reduced flow of water into the plant through the roots and continued transpiration, because of the slow closure of stomata, bring about a rapid decline in leaf water potential and wilting of primary leaves.
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Claims 11
Claim · model-written summary
Cotton seedlings wilted when whole plants or roots were chilled in light.
- Taxon
- Cotton
Gossypium hirsutume0 - Treatment
- entire plants or roots alone were chilled in the lighte0
- Outcome
- seedlings wiltede0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings wilted when entire plants or roots alone were chilled in the light”
Claim · model-written summary
Bean seedlings wilted when whole plants or roots were chilled in light.
- Taxon
- beane0
- Treatment
- entire plants or roots alone were chilled in the lighte0
- Outcome
- seedlings wiltede0
Not reportedComparatorDirection
Verbatim
e0“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings wilted when entire plants or roots alone were chilled in the light”
Claim · model-written summary
Chilling collard seedlings had little or no effect on leaf water potential.
- Taxon
- collarde0
- Treatment
- Chilling either whole seedlings or roots alonee0
- Outcome
- leaf water potentialse0
- Direction
- little or no effecte0
Not reportedComparator
Verbatim
e0“Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings”
Claim · model-written summary
Chilling collard seedlings had little or no effect on gas exchange.
- Taxon
- collarde0
- Treatment
- Chilling either whole seedlings or roots alonee0
- Outcome
- gas exchangee0
- Direction
- little or no effecte0
Not reportedComparator
Verbatim
e0“Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings”
Claim · model-written summary
Chilling rapidly reduced cotton leaf water potential below - 1.5 MPa within 1-2 h.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- Chillinge0
- Outcome
- Leaf water potentialse0
- Direction
- reducede0
- Value
- - 1.5 MPae0
- Qualifier
- within 1-2 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings but induced a rapid response in cotton and bean. Leaf water potentials were reduced below - 1.5 MPa within 1-2 h”
Claim · model-written summary
Chilling rapidly reduced bean leaf water potential below - 1.5 MPa within 1-2 h.
- Taxon
- beane0
- Treatment
- Chillinge0
- Outcome
- Leaf water potentialse0
- Direction
- reducede0
- Value
- - 1.5 MPae0
- Qualifier
- within 1-2 he0
Not reportedComparator
Verbatim
e0“Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings but induced a rapid response in cotton and bean. Leaf water potentials were reduced below - 1.5 MPa within 1-2 h”
Claim · model-written summary
Chilling in darkness reduced the leaf water potential response in sensitive seedlings.
- Taxon
- CottonGossypium hirsutume1
- Treatment
- chilled in the darke0
- Outcome
- responsee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this response was reduced when seedlings were chilled in the dark”
e1“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings wilted when entire plants or roots alone were chilled in the light”
Claim · model-written summary
Abscisic acid pretreatment of bean leaves or roots reduced the chilling water potential response.
- Taxon
- beane0
- Organ / stage
- leaves or rootse0
- Treatment
- pretreated with abscisic acide0
- Outcome
- responsee0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“this response was reduced when seedlings were chilled in the dark or when leaves or roots of bean were pretreated with abscisic acid”
Claim · model-written summary
Chilling rapidly reduced photosynthesis in sensitive seedlings.
- Taxon
- CottonGossypium hirsutume1
- Treatment
- Chillinge0
- Outcome
- photosynthesise0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chilling also caused a rapid reduction in photosynthesis”
e1“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings”
Claim · model-written summary
Chilling caused a more gradual decline in transpiration during the first 2-4 h.
- Taxon
- CottonGossypium hirsutume1
- Treatment
- Chillinge2
- Outcome
- transpiratione0
- Direction
- declinee0
- Qualifier
- over the first 2-4 he0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a more gradual decline in transpiration over the first 2-4 h due to the slow closure of stomata”
e1“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings wilted when entire plants or roots alone were chilled in the light”
e2“Chilling either whole seedlings or roots alone had little or no effect on leaf water potentials or gas exchange of collard seedlings”
Claim · model-written summary
Authors attribute chilling water deficits to reduced root membrane conductivity and lost stomatal control.
- Taxon
- CottonGossypium hirsutume1
- Outcome
- water deficits in chilling-sensitive seedlingse0
- Qualifier
- reduction in the hydraulic conductivity of the root membranes and by the loss of stomatal control in the leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water deficits in chilling-sensitive seedlings when exposed to low temperature in the light are caused by a reduction in the hydraulic conductivity of the root membranes and by the loss of stomatal control in the leaves”
e1“Cotton (Gossypium hirsutum) and bean (Phaseolus vulgaris) seedlings”
The same questions in other papers
cold · physiology: water · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
cold · physiology: water · Phaseolus vulgaris (common bean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
cold · physiology: photosynthesis · Gossypium hirsutum (cotton)Positive and negative results
7 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
5 papers more in this group
See all 9 papers →cold · physiology: gas exchange · Gossypium hirsutum (cotton)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.