Abstract
Net fluxes of H + and Ca 2+ were measured in the mesophyll tissue of broad bean ( Vicia faba L.) leaves and in protoplasts derived from these cells. NaCl at 90 m M enhanced H + extrusion in both protoplasts and tissue, but in different ways. Proton extrusion was inhibited by vanadate, suggesting the involvement of the plasma membrane H + -ATPase in cell responses to salinity. There was virtually no effect of NaCl on the net Ca 2+ flux in protoplasts, while in the tissue a large transient Ca 2+ efflux followed the salt treatment. Salt-induced Ca 2+ efflux was essentially independent of external Ca 2+ concentrations in the range 0.1 to 10 m M . Also, Ca 2+ flux responses were ‘saturated’ above 50 m M NaCl. It is suggested that almost all the measured Ca 2+ flux originates from Na + /Ca 2+ and H + /Ca 2+ ion exchange in the cell wall. This conclusion was supported by the results of modelling cation exchange in the cell wall. Copyright 2000 Annals of Botany Company
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Claims 7
Claim · model-written summary
NaCl enhanced proton extrusion in protoplasts and tissue.
- Taxon
- broad bean ( Vicia faba L.)
Vicia fabae1 - Organ / stage
- protoplasts and tissuee0
- Treatment
- NaCl at 90 m Me0
- Outcome
- H + extrusione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NaCl at 90 m M enhanced H + extrusion in both protoplasts and tissue”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
Vanadate inhibited proton extrusion.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Treatment
- vanadatee0
- Outcome
- Proton extrusione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Proton extrusion was inhibited by vanadate”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
NaCl had virtually no effect on protoplast calcium flux.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Treatment
- NaCle0
- Outcome
- net Ca 2+ flux in protoplastse0
- Direction
- virtually no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was virtually no effect of NaCl on the net Ca 2+ flux in protoplasts”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
Salt caused a large transient calcium efflux in tissue.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Treatment
- salt treatmente0
- Outcome
- Ca 2+ effluxe0
- Direction
- effluxe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the tissue a large transient Ca 2+ efflux followed the salt treatment.”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
Salt induced calcium efflux was independent of external calcium over 0.1 to 10 m M.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Treatment
- Salte0
- Outcome
- Ca 2+ effluxe0
- Direction
- no_changeinferrede0
- Qualifier
- 0.1 to 10 m Me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt-induced Ca 2+ efflux was essentially independent of external Ca 2+ concentrations in the range 0.1 to 10 m M”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
Calcium flux response saturated above 50 m M NaCl.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Treatment
- 50 m M NaCle0
- Outcome
- Ca 2+ flux responsese0
- Direction
- saturatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca 2+ flux responses were ‘saturated’ above 50 m M NaCl.”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
Claim · model-written summary
Authors attribute measured calcium flux mainly to cell wall ion exchange.
- Taxon
- broad bean ( Vicia faba L.)Vicia fabae1
- Outcome
- measured Ca 2+ fluxe0
- Qualifier
- Na + /Ca 2+ and H + /Ca 2+ ion exchange in the cell walle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“almost all the measured Ca 2+ flux originates from Na + /Ca 2+ and H + /Ca 2+ ion exchange in the cell wall.”
t0“Bean Leaf Mesophyll”
e1“broad bean ( Vicia faba L.) leaves”
The same questions in other papers
sodium chloride · nutrient: content · Vicia faba (faba bean)Results agree
7 papers in the same direction as this paper
- negative
- negative
- negative
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.