Abstract
The light-harvesting chlorophyll a/b binding proteins (LHCB) are perhaps the most abundant membrane proteins in nature. It is reported here that the down-regulation or disruption of any member of the LHCB family, LHCB1, LHCB2, LHCB3, LHCB4, LHCB5, or LHCB6, reduces responsiveness of stomatal movement to ABA, and therefore results in a decrease in plant tolerance to drought stress in Arabidopsis thaliana. By contrast, over-expression of a LHCB member, LHCB6, enhances stomatal sensitivity to ABA. In addition, the reactive oxygen species (ROS) homeostasis and a set of ABA-responsive genes are altered in the lhcb mutants. These data demonstrate that LHCBs play a positive role in guard cell signalling in response to ABA and suggest that they may be involved in ABA signalling partly by modulating ROS homeostasis.
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Claims 6
Claim · model-written summary
Down-regulation or disruption of each named LHCB member reduces stomatal ABA responsiveness.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- down-regulation or disruptione0
- Gene
- LHCB1, LHCB2, LHCB3, LHCB4, LHCB5, or LHCB6e0
- Outcome
- responsiveness of stomatal movement to ABAe0
- Direction
- reducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the down-regulation or disruption of any member of the LHCB family, LHCB1, LHCB2, LHCB3, LHCB4, LHCB5, or LHCB6, reduces responsiveness of stomatal movement to ABA”
t0“Arabidopsis”
Claim · model-written summary
LHCB down-regulation or disruption decreases drought tolerance.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- down-regulation or disruptione0
- Outcome
- plant tolerance to drought stresse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is reported here that the down-regulation or disruption of any member of the LHCB family, LHCB1, LHCB2, LHCB3, LHCB4, LHCB5, or LHCB6, reduces responsiveness of stomatal movement to ABA, and therefore results in a decrease in plant tolerance to drought stress in Arabidopsis thaliana.”
Claim · model-written summary
LHCB6 over-expression enhances stomatal sensitivity to ABA.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- over-expression of a LHCB member, LHCB6e0
- Gene
- LHCB6e0
- Outcome
- stomatal sensitivity to ABAe0
- Direction
- enhancese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“over-expression of a LHCB member, LHCB6, enhances stomatal sensitivity to ABA.”
t0“Arabidopsis”
Claim · model-written summary
ROS homeostasis is altered in lhcb mutants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- lhcb mutantse0
- Outcome
- reactive oxygen species (ROS) homeostasise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reactive oxygen species (ROS) homeostasis and a set of ABA-responsive genes are altered in the lhcb mutants.”
t0“Arabidopsis”
Claim · model-written summary
ABA-responsive genes are altered in lhcb mutants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- lhcb mutantse0
- Outcome
- ABA-responsive genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reactive oxygen species (ROS) homeostasis and a set of ABA-responsive genes are altered in the lhcb mutants.”
t0“Arabidopsis”
Claim · model-written summary
LHCBs may participate in ABA signalling partly through ROS homeostasis.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- LHCBse0
- Outcome
- ABA signallinge0
- Qualifier
- modulating ROS homeostasise0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These data demonstrate that LHCBs play a positive role in guard cell signalling in response to ABA and suggest that they may be involved in ABA signalling partly by modulating ROS homeostasis.”
t0“Arabidopsis”
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