Abstract
L.) ethylene promotes root elongation in a concentration dependent manner. However, the crosstalk between ethylene and auxin remains unknown during sugar beet seedling development. Our experiments have shown that exogenously applied auxin (indole-3-acetic acid; IAA) also stimulates root elongation. We also show that auxin promotes ethylene biosynthesis leading to longer roots. We have further demonstrated that the auxin treatment stimulates ethylene production by redirecting the pool of available 1-aminocyclopropane-1-carboxylic acid (ACC) toward ethylene instead of malonyl-ACC (MACC) resulting in a prolonged period of high rates of ethylene production and subsequently a longer root. On the other hand we have also shown that endogenous IAA levels were not affected by an ACC treatment during germination. All together our findings suggest that the general model for auxin-ethylene crosstalk during early root development, where ethylene controls auxin biosynthesis and transport, does not occur in sugar beet. On the contrary, we have shown that the opposite, where auxin stimulates ethylene biosynthesis, is true for sugar beet root development.
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Claims 5
Claim · model-written summary
Exogenously applied auxin (IAA) stimulated root elongation in sugar beet.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Treatment
- exogenously applied auxin (indole-3-acetic acid; IAA)e0
- Outcome
- root elongatione0
- Direction
- stimulatese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“exogenously applied auxin (indole-3-acetic acid; IAA) also stimulates root elongation”
Claim · model-written summary
Auxin promoted ethylene biosynthesis, leading to longer roots.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- auxine0
- Outcome
- ethylene biosynthesise0
- Direction
- promotese0
- Qualifier
- leading to longer rootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“We also show that auxin promotes ethylene biosynthesis leading to longer roots”
Claim · model-written summary
Auxin treatment stimulated ethylene production by redirecting available ACC toward ethylene instead of MACC.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- auxin treatmente0
- Compound
- 1-aminocyclopropane-1-carboxylic acid (ACC)e0
- Outcome
- ethylene productione0
- Qualifier
- redirecting the pool of available 1-aminocyclopropane-1-carboxylic acid (ACC) toward ethylene instead of malonyl-ACC (MACC)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“the auxin treatment stimulates ethylene production by redirecting the pool of available 1-aminocyclopropane-1-carboxylic acid (ACC) toward ethylene instead of malonyl-ACC (MACC)”
Claim · model-written summary
Endogenous IAA levels were not affected by ACC treatment during germination.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- ACC treatmente0
- Outcome
- endogenous IAA levelse0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“endogenous IAA levels were not affected by an ACC treatment during germination”
Claim · model-written summary
The general model of auxin-ethylene crosstalk, in which ethylene controls auxin biosynthesis and transport, does not occur in sugar beet.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- auxin-ethylene crosstalk during early root developmente0
- Qualifier
- does not occur in sugar beete0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Sugar Beet”
e0“the general model for auxin-ethylene crosstalk during early root development, where ethylene controls auxin biosynthesis and transport, does not occur in sugar beet”
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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.