Abstract
Rooting experiments carried out with isolated primary leaves of dwarf bean demonstrated the effect of GA on increasing the IAA level and IAA synthesis. Pretreatment of the lamina of isolated leaves with GA, especially when tryptophane was added at the same time, strikingly increased the rooting of petioles. Enhanced root formation on the petiole of GA-pretreated leaves can be attributed to increase of IAA level by GA in the lamina, i.e. in IAA biosynthesis the utilization of tryptophane released from the proteins of isolated leaves is promoted by GA. Application of TIBA on the upper part of petiole suppressed the stimulatory effect of GA on root initiation presumably because TIBA inhibits the transport of IAA into the petiole, which results in failure of rooting. Pretreatment of the leaves with cytokinins also results in failure of root production. These substances retard protein decomposition in isolated leaves so that the quantity of TPP available for auxin synthesis is less. Simultaneously, this treatment increases the cytokinin concentration in the leaf tissues so that the auxin/cytokinin ratio alters and mainly callus forms on the base of the petioles and differentiation of root primordia cannot take place.
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Claims 12
Claim · model-written summary
GA increased IAA level and synthesis in isolated dwarf bean leaves.
- Taxon
- dwarf beane0
- Organ / stage
- primary leavese0
- Treatment
- GAe0
- Outcome
- IAA level and IAA synthesise0
- Direction
- increasinge0
Not reportedComparator
Verbatim
e0“isolated primary leaves of dwarf bean demonstrated the effect of GA on increasing the IAA level and IAA synthesis”
Claim · model-written summary
GA pretreatment increased rooting of detached leaf petioles.
- Taxon
- Dwarf Beant0
- Organ / stage
- petiolese0
- Treatment
- GAe0
- Outcome
- rooting of petiolese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Pretreatment of the lamina of isolated leaves with GA, especially when tryptophane was added at the same time, strikingly increased the rooting of petioles”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Adding tryptophane with GA particularly increased petiole rooting.
- Taxon
- Dwarf Beant0
- Treatment
- tryptophane was added at the same timee0
- Outcome
- rooting of petiolese0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“especially when tryptophane was added at the same time, strikingly increased the rooting of petioles”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
The authors attribute enhanced GA-induced rooting to increased IAA level in the lamina.
Verbatim
e0“Enhanced root formation on the petiole of GA-pretreated leaves can be attributed to increase of IAA level by GA in the lamina”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
GA promotes use of tryptophane released from proteins in IAA biosynthesis.
Verbatim
e0“in IAA biosynthesis the utilization of tryptophane released from the proteins of isolated leaves is promoted by GA”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
TIBA applied to the upper petiole suppressed GA-stimulated root initiation.
Verbatim
e0“Application of TIBA on the upper part of petiole suppressed the stimulatory effect of GA on root initiation”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
The authors suggest TIBA suppresses rooting by inhibiting IAA transport into the petiole.
Verbatim
e0“TIBA inhibits the transport of IAA into the petiole, which results in failure of rooting”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Cytokinin pretreatment prevented root production.
Not reportedComparatorDirection
Verbatim
e0“Pretreatment of the leaves with cytokinins also results in failure of root production”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Cytokinins retard protein decomposition, leaving less TPP for auxin synthesis.
Verbatim
e0“These substances retard protein decomposition in isolated leaves so that the quantity of TPP available for auxin synthesis is less”
e1“Pretreatment of the leaves with cytokinins”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Cytokinin treatment increased cytokinin concentration in leaf tissue.
- Taxon
- Dwarf Beant0
- Organ / stage
- leaf tissuese0
- Treatment
- cytokininse1
- Outcome
- cytokinin concentratione0
- Direction
- increasese0
Not reportedComparator
Verbatim
e0“this treatment increases the cytokinin concentration in the leaf tissues”
e1“Pretreatment of the leaves with cytokinins”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Cytokinin pretreatment caused callus formation at petiole bases.
Not reportedComparatorDirection
Verbatim
e0“mainly callus forms on the base of the petioles”
e1“this treatment increases the cytokinin concentration”
e2“Pretreatment of the leaves with cytokinins”
t0“Dwarf Bean (Phaseolus vulgaris)”
Claim · model-written summary
Cytokinin pretreatment prevented root primordium differentiation.
Not reportedComparatorDirection
Verbatim
e0“differentiation of root primordia cannot take place”
e1“Pretreatment of the leaves with cytokinins”
t0“Dwarf Bean (Phaseolus vulgaris)”
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