Abstract
The effects exerted by divalent cations Ca2+ and Mg2+ on spontaneous, IAA- and H+-induced elongation were investigated with excised mung bean hypocotyl segments. Low concentrations of calcium (<1 mM) were sufficient to inhibit spontaneous and IAA-induced elongation of abraded segments without any lag time whereas effects of magnesium were not so evident. The initial growth rate could be restored, at least partly, with EDTA or acidic solutions. Both calcium and magnesium enhanced H+ excretion but Mg2+ was a more potent activator. Divalent cations also induced simultaneously an inhibition of growth and a stimulation of proton release. Such contrasting effects are discussed with respect to the functions of the cuticle.
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Claims 6
Claim · model-written summary
Low calcium inhibited spontaneous and IAA-induced elongation without lag.
- Taxon
- Vigna radiata
.jpg?width=60)
Vigna radiatat0 - Organ / stage
- abraded segmentse0
- Treatment
- calcium (<1 mM)e0
- Outcome
- spontaneous and IAA-induced elongatione0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Low concentrations of calcium (<1 mM) were sufficient to inhibit spontaneous and IAA-induced elongation of abraded segments without any lag time”
t0“Vigna radiata Hypocotyl Sections”
Claim · model-written summary
Magnesium effects on elongation were less evident.
- Taxon
- Vigna radiataVigna radiatat0
- Outcome
- effects of magnesiume0
- Qualifier
- not so evidente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas effects of magnesium were not so evident”
t0“Vigna radiata Hypocotyl Sections”
Claim · model-written summary
EDTA or acid partly restored initial growth rate.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- EDTA or acidic solutionse0
- Outcome
- initial growth ratee0
- Direction
- restorede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The initial growth rate could be restored, at least partly, with EDTA or acidic solutions.”
t0“Vigna radiata Hypocotyl Sections”
Claim · model-written summary
Calcium enhanced proton excretion.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- calciume0
- Outcome
- H+ excretione0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both calcium and magnesium enhanced H+ excretion but Mg2+ was a more potent activator.”
t0“Vigna radiata Hypocotyl Sections”
Claim · model-written summary
Magnesium enhanced proton excretion and was the more potent activator.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- magnesiume0
- Outcome
- H+ excretione0
- Direction
- more potente0
- Comparator
- calciume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both calcium and magnesium enhanced H+ excretion but Mg2+ was a more potent activator.”
t0“Vigna radiata Hypocotyl Sections”
Claim · model-written summary
Divalent cations inhibited growth while stimulating proton release.
- Taxon
- Vigna radiataVigna radiatat0
- Treatment
- Divalent cationse0
- Outcome
- inhibition of growthe0
- Direction
- inhibitione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Divalent cations also induced simultaneously an inhibition of growth and a stimulation of proton release.”
t0“Vigna radiata Hypocotyl Sections”
The same questions in other papers
calcium atom · growth · Vigna radiata (mung bean)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →ethylenediaminetetraacetic acid · growth · Vigna radiata (mung bean)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.