Abstract
Drought stress is one of the main factors limiting yield in tea plants. The plant cell's ability to preserve K+ homeostasis is an important strategy for coping with drought stress. Plasma membrane H+-ATPase in the mesophyll cell is important for maintaining membrane potential to regulate K+ transmembrane transport. However, no research to date has investigated the possible relationship between plasma membrane H+-ATPase and mesophyll K+ retention in tea plants under drought and subsequent rehydration conditions. In our experiment, drought stress inhibited plasma membrane H+-ATPase activities and induced net H+ influx, leading to membrane potential depolarization and inducing a massive K+ efflux in tea plant mesophyll cells. Subsequent rehydration increased plasma membrane H+-ATPase activity and induced net H+ efflux, leading to membrane potential hyperpolarization and thus lowering K+ loss. A first downregulated and then upregulated plasma membrane H+-ATPase protein expression level was also observed under drought and subsequent rehydration treatment, a finding in agreement with the change of measured plasma membrane H+-ATPase activities. Taken together, our results suggest that maintenance of mesophyll K+ in tea plants under drought and rehydration is associated with regulation of plasma membrane H+-ATPase activity.
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Claims 11
Claim · model-written summary
Drought stress inhibited plasma membrane H+-ATPase activity in tea plant mesophyll cells.
- Taxon
- tea plantst0
- Treatment
- drought stresse1
- Outcome
- plasma membrane H+-ATPase activitiese1
- Direction
- inhibitede1
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e1“drought stress inhibited plasma membrane H+-ATPase activities and induced net H+ influx, leading to membrane potential depolarization and inducing a massive K+ efflux in tea plant mesophyll cells.”
Claim · model-written summary
Drought stress induced a net H+ influx in tea plant mesophyll cells.
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e1“drought stress inhibited plasma membrane H+-ATPase activities and induced net H+ influx, leading to membrane potential depolarization and inducing a massive K+ efflux in tea plant mesophyll cells.”
Claim · model-written summary
Drought stress depolarized the membrane potential of tea plant mesophyll cells.
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e1“drought stress inhibited plasma membrane H+-ATPase activities and induced net H+ influx, leading to membrane potential depolarization and inducing a massive K+ efflux in tea plant mesophyll cells.”
Claim · model-written summary
Drought stress induced a massive K+ efflux from tea plant mesophyll cells.
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e1“drought stress inhibited plasma membrane H+-ATPase activities and induced net H+ influx, leading to membrane potential depolarization and inducing a massive K+ efflux in tea plant mesophyll cells.”
Claim · model-written summary
Subsequent rehydration increased plasma membrane H+-ATPase activity in tea plants.
- Taxon
- tea plantst0
- Treatment
- Subsequent rehydratione2
- Outcome
- plasma membrane H+-ATPase activitye2
- Direction
- increasede2
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e2“Subsequent rehydration increased plasma membrane H+-ATPase activity and induced net H+ efflux, leading to membrane potential hyperpolarization and thus lowering K+ loss.”
Claim · model-written summary
Subsequent rehydration induced net H+ efflux and membrane potential hyperpolarization in tea plants.
- Taxon
- tea plantst0
- Treatment
- Subsequent rehydratione2
- Outcome
- membrane potentiale2
- Direction
- hyperpolarizatione2
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e2“Subsequent rehydration increased plasma membrane H+-ATPase activity and induced net H+ efflux, leading to membrane potential hyperpolarization and thus lowering K+ loss.”
Claim · model-written summary
Subsequent rehydration lowered K+ loss from tea plant mesophyll cells.
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e2“Subsequent rehydration increased plasma membrane H+-ATPase activity and induced net H+ efflux, leading to membrane potential hyperpolarization and thus lowering K+ loss.”
Claim · model-written summary
Plasma membrane H+-ATPase protein expression was first downregulated under drought and subsequent rehydration treatment.
- Taxon
- tea plantst0
- Treatment
- drought and subsequent rehydration treatmente3
- Outcome
- plasma membrane H+-ATPase protein expression levele3
- Direction
- downregulatede3
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e3“A first downregulated and then upregulated plasma membrane H+-ATPase protein expression level was also observed under drought and subsequent rehydration treatment, a finding in agreement with the change of measured plasma membrane H+-ATPase activities.”
Claim · model-written summary
Plasma membrane H+-ATPase protein expression was then upregulated under drought and subsequent rehydration treatment.
- Taxon
- tea plantst0
- Treatment
- drought and subsequent rehydration treatmente3
- Outcome
- plasma membrane H+-ATPase protein expression levele3
- Direction
- upregulatede3
Not reportedComparator
Verbatim
t0“tea plants to drought and subsequent rehydration”
e3“A first downregulated and then upregulated plasma membrane H+-ATPase protein expression level was also observed under drought and subsequent rehydration treatment, a finding in agreement with the change of measured plasma membrane H+-ATPase activities.”
Claim · model-written summary
Protein expression changes of plasma membrane H+-ATPase agree with the measured changes in its activity.
- Taxon
- tea plantst0
- Treatment
- drought and subsequent rehydration treatmente3
- Outcome
- plasma membrane H+-ATPase protein expression levele3
Not reportedDirection
Verbatim
t0“tea plants to drought and subsequent rehydration”
e3“A first downregulated and then upregulated plasma membrane H+-ATPase protein expression level was also observed under drought and subsequent rehydration treatment, a finding in agreement with the change of measured plasma membrane H+-ATPase activities.”
Claim · model-written summary
Maintenance of mesophyll K+ in tea plants under drought and rehydration is associated with regulation of plasma membrane H+-ATPase activity.
Not reportedDirection
Verbatim
e4“Taken together, our results suggest that maintenance of mesophyll K+ in tea plants under drought and rehydration is associated with regulation of plasma membrane H+-ATPase activity.”
The same questions in other papers
drought · molecular: expression · Camellia sinensis (black tea)Results agree
5 papers in the same direction as this paper
- positive
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2 papers more in this group
See all 6 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.