Abstract
Mode of action of FC was compared with that of auxin in different experimental systems and the following results were obtained. FC, as well as auxin, primarily induced elongation of the epidermis of pea epicotyl segments, but it also promoted elongation of the inner tissue, as judged by its action in split stem tests, elongation of hollow-cylinder segments and elongation of unpeeled and peeled segments. FC decreased the minimum stress relaxation time (T0) and increased the extensibility (mm/gr) of the epidermal cell wall of pea epicotyl segments, as did auxin. FC failed to induce expansion growth of Jerusalem artichoke tuber slices when given alone or in combination with kinetin or gibberellic acid. FC at concentrations lower than 10−6M, when given with auxin at concentrations lower than 0.03 mg/liter, promoted elongation of Avena coleoptile segments in an additive manner, to achieve the maximum elongation at higher concentrations. An antiauxin, 2,4,6-trichlorophenoxyacetic acid, inhibited the elongation of Avena coleoptile segments due to auxin but not that due to FC. Nojirimycin, an inhibitor of β-glycosidases, inhibited elongation of pea internode segments due not only to auxin but also to FC. At concentrations more than 10−5M FC promoted root elongation of intact lettuce seedlings, which was inhibited by exogenous auxin. From these results it is concluded that FC and auxin have a common mechanism, which may involve hydrogen ion extrusion, leading to cell wall loosening and thus cell elongation. This growth is limited to the extent that the cells are capable of elongating in response to hydrogen ions. Otherwise there is a definite difference in the mode of actions between FC and auxin, including the nature of cellular receptors for these two compounds.
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Claims 14
Claim · model-written summary
Fusicoccin and auxin primarily induced epidermal elongation in pea epicotyl segments.
- Taxon
- pea
Lathyrus oleraceuse0 - Organ / stage
- epicotyl segmentse0
- Treatment
- FC, as well as auxine0
- Outcome
- elongation of the epidermise0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC, as well as auxin, primarily induced elongation of the epidermis of pea epicotyl segments”
Claim · model-written summary
Fusicoccin promoted elongation of inner tissue in pea epicotyl segments.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- FCe0
- Outcome
- elongation of the inner tissuee0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC, as well as auxin, primarily induced elongation of the epidermis of pea epicotyl segments, but it also promoted elongation of the inner tissue, as judged by its action in split stem tests, elongation of hollow-cylinder segments and elongation of unpeeled and peeled segments”
Claim · model-written summary
Fusicoccin decreased minimum stress relaxation time in pea epicotyl epidermal cell walls, as did auxin.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- FCe0
- Outcome
- minimum stress relaxation time (T0)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC decreased the minimum stress relaxation time (T0) and increased the extensibility (mm/gr) of the epidermal cell wall of pea epicotyl segments, as did auxin”
Claim · model-written summary
Fusicoccin increased extensibility of pea epicotyl epidermal cell walls, as did auxin.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- FCe0
- Outcome
- extensibility (mm/gr)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC decreased the minimum stress relaxation time (T0) and increased the extensibility (mm/gr) of the epidermal cell wall of pea epicotyl segments, as did auxin”
Claim · model-written summary
Fusicoccin alone failed to induce expansion growth of Jerusalem artichoke tuber slices.
- Taxon
- Jerusalem artichoke
.jpg?width=60)
Helianthus tuberosuse0 - Organ / stage
- tuber slicese0
- Treatment
- FCe0
- Outcome
- expansion growthe0
- Direction
- failed to inducee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“FC failed to induce expansion growth of Jerusalem artichoke tuber slices when given alone or in combination with kinetin or gibberellic acid”
Claim · model-written summary
Fusicoccin with kinetin or gibberellic acid failed to induce expansion growth of Jerusalem artichoke tuber slices.
- Taxon
- Jerusalem artichokeHelianthus tuberosuse0
- Treatment
- FCe0
- Outcome
- expansion growthe0
- Direction
- failed to inducee0
- Qualifier
- in combination with kinetin or gibberellic acide0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC failed to induce expansion growth of Jerusalem artichoke tuber slices when given alone or in combination with kinetin or gibberellic acid”
Claim · model-written summary
Low concentrations of fusicoccin and auxin additively promoted Avena coleoptile elongation.
- Treatment
- FC at concentrations lower than 10−6M, when given with auxin at concentrations lower than 0.03 mg/litere0
- Outcome
- elongation of Avena coleoptile segmentse0
- Direction
- promotede0
AvenaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“FC at concentrations lower than 10−6M, when given with auxin at concentrations lower than 0.03 mg/liter, promoted elongation of Avena coleoptile segments in an additive manner, to achieve the maximum elongation at higher concentrations”
Claim · model-written summary
The antiauxin inhibited auxin induced Avena coleoptile elongation.
- Treatment
- 2,4,6-trichlorophenoxyacetic acide0
- Outcome
- elongation of Avena coleoptile segments due to auxine0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An antiauxin, 2,4,6-trichlorophenoxyacetic acid, inhibited the elongation of Avena coleoptile segments due to auxin but not that due to FC”
Claim · model-written summary
The antiauxin did not inhibit fusicoccin induced Avena coleoptile elongation.
- Treatment
- 2,4,6-trichlorophenoxyacetic acide0
- Outcome
- elongation of Avena coleoptile segmentse0
- Direction
- note0
- Qualifier
- due to FCe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An antiauxin, 2,4,6-trichlorophenoxyacetic acid, inhibited the elongation of Avena coleoptile segments due to auxin but not that due to FC”
Claim · model-written summary
Nojirimycin inhibited both auxin and fusicoccin induced pea internode elongation.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Nojirimycine0
- Outcome
- elongation of pea internode segmentse0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nojirimycin, an inhibitor of β-glycosidases, inhibited elongation of pea internode segments due not only to auxin but also to FC”
Claim · model-written summary
Fusicoccin above 10−5M promoted root elongation in intact lettuce seedlings.
- Taxon
- lettuce
Lactuca sativae0 - Treatment
- FCe0
- Outcome
- root elongatione0
- Direction
- promotede0
- Qualifier
- concentrations more than 10−5Me0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At concentrations more than 10−5M FC promoted root elongation of intact lettuce seedlings, which was inhibited by exogenous auxin”
Claim · model-written summary
Exogenous auxin inhibited fusicoccin promoted root elongation of lettuce seedlings.
- Taxon
- lettuceLactuca sativae0
- Treatment
- exogenous auxine0
- Outcome
- root elongatione0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At concentrations more than 10−5M FC promoted root elongation of intact lettuce seedlings, which was inhibited by exogenous auxin”
Claim · model-written summary
The authors infer that fusicoccin and auxin share a mechanism involving hydrogen ion extrusion and cell wall loosening.
Not reportedTaxon
Verbatim
e0“FC and auxin have a common mechanism, which may involve hydrogen ion extrusion, leading to cell wall loosening and thus cell elongation”
Claim · model-written summary
The authors infer different cellular receptor actions for fusicoccin and auxin.
Not reportedTaxon
Verbatim
e0“there is a definite difference in the mode of actions between FC and auxin, including the nature of cellular receptors for these two compounds”
The same questions in other papers
nojirimycin · growth · Lathyrus oleraceus (pea)Results agree
1 paper in the same direction as this paper
- negative
class · growth · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 8 in the opposite direction
- positive
- positive
- positive
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See all 10 papers →class · growth · AvenaPositive and negative results
5 papers in the same direction as this paper · 5 in the opposite direction
- negative
- no effect
- negative
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See all 11 papers →class · growth · Lathyrus oleraceus (pea)Positive and negative results
21 papers in the same direction as this paper · 15 in the opposite direction
- negative
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See all 37 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.