Abstract
The effect of Co(2+) on ethylene production by mung bean (Phaseolus aureus Roxb.) and by apple tissues was studied. Co(2+), depending on concentrations applied, effectively inhibited ethylene production by both tissues. It also strongly inhibited the ethylene production induced by IAA, kinetin, IAA plus kinetin, Ca(2+), kinetin plus Ca(2+), or Cu(2+) treatments in mung bean hypocotyl segments. While Co(2+) greatly inhibited ethylene production, it had little effect on the respiration of apple tissue, indicating that Co(2+) does not exert its inhibitory effect as a general metabolic inhibitor. Ni(2+), which belongs to the same group as Co(2+) in the periodic table, also markedly curtailed both the basal and the induced ethylene production by apple and mung bean hypocotyl tissues.In a system in which kinetin and Ca(2+) were applied together, kinetin greatly enhanced Ca(2+) uptake, thus enhancing ethylene production. Co(2+), however, slightly inhibited the uptake of Ca(2+) but appreciably inhibited ethylene production, either in the presence or in the absence of kinetin. Tracer experiments using apple tissue indicated that Co(2+) strongly inhibited the in vivo conversion of l-[U-(14)C]methionine to (14)C-ethylene. These data suggest that Co(2+) inhibited ethylene production by inhibiting the conversion of methionine to ethylene, a common step which is required for ethylene formation by higher plants.Co(2+) is known to promote elongation, leaf expansion, and hook opening in excised plant parts in response to applied auxins or cytokinins. Since ethylene is known to inhibit these growth phenomena, it is suggested that Co(2+) exerts its promotive effect, at least in part, by inhibiting ethylene formation.
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Claims 13
Claim · model-written summary
Applied Co(2+) inhibited ethylene production in mung bean tissue.
- Taxon
- mung bean
.jpg?width=60)
Vigna radiatae1 - Treatment
- Co(2+)e0
- Outcome
- ethylene productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Co(2+), depending on concentrations applied, effectively inhibited ethylene production by both tissues.”
e1“mung bean (Phaseolus aureus Roxb.) and by apple tissues”
Claim · model-written summary
Applied Co(2+) inhibited ethylene production in apple tissue.
- Taxon
- apple
Malus domesticae1 - Treatment
- Co(2+)e0
- Outcome
- ethylene productione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co(2+), depending on concentrations applied, effectively inhibited ethylene production by both tissues.”
e1“mung bean (Phaseolus aureus Roxb.) and by apple tissues”
Claim · model-written summary
Co(2+) inhibited ethylene production induced by IAA, kinetin, their combination, Ca(2+), kinetin plus Ca(2+), or Cu(2+) in mung bean hypocotyls.
- Taxon
- mung beanVigna radiatae0
- Organ / stage
- hypocotyl segmentse0
- Treatment
- Co(2+)e1
- Outcome
- ethylene productione0
- Direction
- inhibitede0
- Qualifier
- IAA, kinetin, IAA plus kinetin, Ca(2+), kinetin plus Ca(2+), or Cu(2+) treatmentse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It also strongly inhibited the ethylene production induced by IAA, kinetin, IAA plus kinetin, Ca(2+), kinetin plus Ca(2+), or Cu(2+) treatments in mung bean hypocotyl segments.”
e1“Co(2+), depending on concentrations applied, effectively inhibited ethylene production by both tissues.”
Claim · model-written summary
Co(2+) had little effect on apple tissue respiration.
- Taxon
- appleMalus domesticae0
- Treatment
- Co(2+)e0
- Outcome
- respiratione0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“While Co(2+) greatly inhibited ethylene production, it had little effect on the respiration of apple tissue”
Claim · model-written summary
Ni(2+) curtailed basal ethylene production in apple tissue.
- Taxon
- appleMalus domesticae0
- Treatment
- Ni(2+)e0
- Outcome
- basal and the induced ethylene productione0
- Direction
- curtailede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni(2+), which belongs to the same group as Co(2+) in the periodic table, also markedly curtailed both the basal and the induced ethylene production by apple and mung bean hypocotyl tissues.”
Claim · model-written summary
Ni(2+) curtailed basal and induced ethylene production in mung bean hypocotyl tissue.
- Taxon
- mung beanVigna radiatae0
- Organ / stage
- hypocotyl tissuese0
- Treatment
- Ni(2+)e0
- Outcome
- basal and the induced ethylene productione0
- Direction
- curtailede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ni(2+), which belongs to the same group as Co(2+) in the periodic table, also markedly curtailed both the basal and the induced ethylene production by apple and mung bean hypocotyl tissues.”
Claim · model-written summary
Kinetin enhanced Ca(2+) uptake when both were applied together.
- Taxon
- mung beanVigna radiatae1
- Treatment
- kinetin and Ca(2+)e0
- Outcome
- Ca(2+) uptakee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a system in which kinetin and Ca(2+) were applied together, kinetin greatly enhanced Ca(2+) uptake, thus enhancing ethylene production.”
e1“mung bean hypocotyl segments”
Claim · model-written summary
Kinetin enhanced ethylene production in the Ca(2+) system.
- Taxon
- mung beanVigna radiatae1
- Treatment
- kinetin and Ca(2+)e0
- Outcome
- ethylene productione0
- Direction
- enhancinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In a system in which kinetin and Ca(2+) were applied together, kinetin greatly enhanced Ca(2+) uptake, thus enhancing ethylene production.”
e1“mung bean hypocotyl segments”
Claim · model-written summary
Co(2+) slightly inhibited Ca(2+) uptake.
- Taxon
- mung beanVigna radiatae1
- Treatment
- Co(2+)e0
- Outcome
- uptake of Ca(2+)e0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co(2+), however, slightly inhibited the uptake of Ca(2+) but appreciably inhibited ethylene production, either in the presence or in the absence of kinetin.”
e1“mung bean hypocotyl segments”
Claim · model-written summary
Co(2+) inhibited ethylene production with or without kinetin.
- Taxon
- mung beanVigna radiatae1
- Treatment
- Co(2+)e0
- Outcome
- ethylene productione0
- Direction
- inhibitede0
- Qualifier
- either in the presence or in the absence of kinetine0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Co(2+), however, slightly inhibited the uptake of Ca(2+) but appreciably inhibited ethylene production, either in the presence or in the absence of kinetin.”
e1“mung bean hypocotyl segments”
Claim · model-written summary
Co(2+) strongly inhibited methionine conversion to ethylene in apple tissue.
- Taxon
- appleMalus domesticae0
- Treatment
- Co(2+)e0
- Outcome
- in vivo conversion of l-[U-(14)C]methionine to (14)C-ethylenee0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tracer experiments using apple tissue indicated that Co(2+) strongly inhibited the in vivo conversion of l-[U-(14)C]methionine to (14)C-ethylene.”
Claim · model-written summary
The authors attribute Co(2+) inhibition of ethylene production to inhibition of methionine conversion.
- Taxon
- higher plantsEmbryophytae0
- Treatment
- Co(2+)e0
- Outcome
- ethylene productione0
- Qualifier
- inhibiting the conversion of methionine to ethylenee0
Verbatim
e0“These data suggest that Co(2+) inhibited ethylene production by inhibiting the conversion of methionine to ethylene, a common step which is required for ethylene formation by higher plants.”
Claim · model-written summary
The authors suggest Co(2+) promotes growth responses partly by inhibiting ethylene formation.
Verbatim
e0“Co(2+) exerts its promotive effect, at least in part, by inhibiting ethylene formation.”
e1“Co(2+) is known to promote elongation, leaf expansion, and hook opening in excised plant parts in response to applied auxins or cytokinins.”
The same questions in other papers
nickel(2+) · physiology: hormones · Vigna radiata (mung bean)Results agree
1 paper in the same direction as this paper
- no effect
co2 · molecular: metabolites · Malus domestica (apple)Positive and negative results
3 papers in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
6 papers more in this group
See all 10 papers →co2 · physiology: hormones · Malus domestica (apple)Positive and negative results
2 papers in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
7 papers more in this group
See all 11 papers →co2 · physiology: hormones · Vigna radiata (mung bean)Results agree
2 papers in the same direction as this paper
- negative
- no effect
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.