Abstract
Abstract As the first part of a comprehensive study of the hormonal control of lateral root initiation and development, the effect of surgical treatments such as removal of the root tip, one or more cotyledons, the young epicotyl, or combination of these treatments, on the induction and emergence of lateral roots on the primary root of pea seedlings has been examined. Results show that removal of the root tip leads to a rapid but transitory increase in the number of lateral primordia, the largest number arising in the most apical segment of decapitated roots suggesting the accumulation of acropetally moving promoter substances in this region. The cotyledons appear to be the main source of promoter substances for both the induction and emergence of lateral roots, although one or more promoters also appear to be produced in the epicotyl. The data further indicate that the root tip is possibly the source of a substance which moves basipetally and interacts with acropetally moving promoters to regulate the zone for lateral primordia initiation; the root tip also appears to be the source of a powerful inhibitor of lateral root emergence.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Root-tip removal caused a rapid but transient increase in lateral primordia, greatest in the apical root segment.
- Taxon
- pea seedlings
Lathyrus oleraceuse1 - Organ / stage
- root tipe0
- Treatment
- removal of the root tipe0
- Outcome
- number of lateral primordiae0
- Direction
- increasee0
- Qualifier
- most apical segment of decapitated rootse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“removal of the root tip leads to a rapid but transitory increase in the number of lateral primordia, the largest number arising in the most apical segment of decapitated roots”
e1“pea seedlings”
Claim · model-written summary
Cotyledons appear to be the main source of promoter substances for lateral-root induction and emergence.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Organ / stage
- cotyledonse0
- Outcome
- induction and emergence of lateral rootse0
- Qualifier
- main source of promoter substancese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cotyledons appear to be the main source of promoter substances for both the induction and emergence of lateral roots”
e1“pea seedlings”
Claim · model-written summary
One or more lateral-root promoters also appear to be produced in the epicotyl.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Organ / stage
- epicotyle0
- Outcome
- promoters also appear to be produced in the epicotyle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“one or more promoters also appear to be produced in the epicotyl”
e1“pea seedlings”
Claim · model-written summary
The root tip may supply a basipetally moving substance that interacts with promoters to regulate the initiation zone.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Organ / stage
- root tipe0
- Outcome
- zone for lateral primordia initiatione0
- Qualifier
- moves basipetally and interacts with acropetally moving promoterse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root tip is possibly the source of a substance which moves basipetally and interacts with acropetally moving promoters to regulate the zone for lateral primordia initiation”
e1“pea seedlings”
Claim · model-written summary
The root tip appears to supply a strong inhibitor of lateral-root emergence.
- Taxon
- pea seedlingsLathyrus oleraceuse1
- Organ / stage
- root tipe0
- Outcome
- lateral root emergencee0
- Qualifier
- powerful inhibitore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root tip also appears to be the source of a powerful inhibitor of lateral root emergence”
e1“pea seedlings”