Abstract
Abstract The effect of indol‐3yl‐acetic acid on root formation, accumulation of 80% ethanol‐soluble sugars and basipetal transport of 14 C‐labelled assimilates has been investigated in Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings. The removal of leaves reduced root formation in the hypocotyl, while excision of the apical bud was less detrimental. The expression of the IAA effect in inducing more roots was dependent on the area of leaves, and was found to be better when all leaves were present. Sugars accumulated slowly at the base of cuttings during a four‐day period after excision, and IAA greatly enhanced this accumulation. By comparing sugar content at the base of green and starved cuttings it was established that IAA greatly increased it concurrently with root formation. IAA applied in solution to the hypocotyl greatly enhanced the basipetal transport of 14 C‐labelled assimilates and their accumulation at the hypocotyl during a 24‐h period. The IAA‐induced accumulation was found to be connected with a greater mobilization of labelled assimilates from upper parts of the cutting. Experiments involving pretreatment with IAA and transport in cuttings already possessing root primordia, suggest a dual effect of IAA: (I) a direct effect on transport, and (2) an increase in the root‐“sink”. It is concluded that both may be operating in inducing basipetal accumulation of labelled assimilates. It is suggested that one of the roles of IAA in promoting rooting of cuttings is to increase sugar availability at the site of root formation.
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Claims 11
Claim · model-written summary
Removing leaves reduced hypocotyl root formation.
- Taxon
- Phaseolus vulgaris
Phaseolus vulgarise1 - Treatment
- removal of leavese0
- Outcome
- root formation in the hypocotyle0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The removal of leaves reduced root formation in the hypocotyl, while excision of the apical bud was less detrimental”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
Apical bud excision was less detrimental to root formation than leaf removal.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- excision of the apical bude0
- Outcome
- root formation in the hypocotyle0
- Direction
- less detrimentale0
- Comparator
- removal of leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The removal of leaves reduced root formation in the hypocotyl, while excision of the apical bud was less detrimental”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA induced more roots when all leaves were present.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- IAAe0
- Outcome
- rootse0
- Direction
- moree0
- Qualifier
- when all leaves were presente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression of the IAA effect in inducing more roots was dependent on the area of leaves, and was found to be better when all leaves were present”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
Sugars accumulated slowly at cutting bases during four days after excision.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Organ / stage
- base of cuttingse0
- Outcome
- Sugarse0
- Direction
- accumulated slowlye0
- Qualifier
- four‐day period after excisione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugars accumulated slowly at the base of cuttings during a four‐day period after excision”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA greatly increased sugar accumulation at cutting bases.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Organ / stage
- base of cuttingse0
- Treatment
- IAAe0
- Outcome
- Sugarse0
- Direction
- greatly enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugars accumulated slowly at the base of cuttings during a four‐day period after excision, and IAA greatly enhanced this accumulation”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA increased basal sugar content concurrently with root formation in green and starved cuttings.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Organ / stage
- base of green and starved cuttingse0
- Treatment
- IAAe0
- Outcome
- sugar contente0
- Direction
- greatly increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By comparing sugar content at the base of green and starved cuttings it was established that IAA greatly increased it concurrently with root formation”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA solution applied to hypocotyls enhanced basipetal transport of labeled assimilates.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- IAA applied in solution to the hypocotyle0
- Outcome
- basipetal transport of 14 C‐labelled assimilatese0
- Direction
- greatly enhancede0
- Qualifier
- 24‐h periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA applied in solution to the hypocotyl greatly enhanced the basipetal transport of 14 C‐labelled assimilates and their accumulation at the hypocotyl during a 24‐h period”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA solution applied to hypocotyls enhanced accumulation of labeled assimilates there.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- IAA applied in solution to the hypocotyle0
- Outcome
- accumulation at the hypocotyle0
- Direction
- greatly enhancede0
- Qualifier
- 24‐h periode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA applied in solution to the hypocotyl greatly enhanced the basipetal transport of 14 C‐labelled assimilates and their accumulation at the hypocotyl during a 24‐h period”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
IAA-associated accumulation was linked to greater mobilization of labeled assimilates from upper cutting regions.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Organ / stage
- upper parts of the cuttinge0
- Treatment
- IAAe0
- Outcome
- mobilization of labelled assimilatese0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The IAA‐induced accumulation was found to be connected with a greater mobilization of labelled assimilates from upper parts of the cutting”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
The authors suggest IAA both directly affects transport and increases root sink strength.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- IAAe0
- Outcome
- transporte0
- Qualifier
- increase in the root‐“sink”e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments involving pretreatment with IAA and transport in cuttings already possessing root primordia, suggest a dual effect of IAA: (I) a direct effect on transport, and (2) an increase in the root‐“sink””
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
Claim · model-written summary
The authors propose that IAA promotes rooting by increasing sugar availability at the site of root formation.
- Taxon
- Phaseolus vulgarisPhaseolus vulgarise1
- Treatment
- IAAe0
- Outcome
- rooting of cuttingse0
- Qualifier
- increase sugar availability at the site of root formatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that one of the roles of IAA in promoting rooting of cuttings is to increase sugar availability at the site of root formation”
e1“Phaseolus vulgaris (cv. Canadian Wonder) hypocotyl cuttings”
The same questions in other papers
indole-3-acetic acid · growth · Phaseolus vulgaris (common bean)Results differ
17 papers in the same direction as this paper · 13 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- negative
28 papers more in this group
See all 32 papers →indole-3-acetic acid · molecular: metabolites · Phaseolus vulgaris (common bean)Positive and negative results
7 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- no effect
- no effect
8 papers more in this group
See all 12 papers →indole-3-acetic acid · quality: sugar starch · Phaseolus vulgaris (common bean)Results agree
3 papers in the same direction as this paper
- positive
- 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.