Abstract
The effect of.distinct regions of the root on the initiation of lateral root primordia and the emergence of lateral roots has been studied, using segments of roots from sterile 2-day germinated pea seedlings. It is shown that the removal of the basal region causes a decrease in the number of primordia formed in the remainder of the root. On the other hand, the removal of the apical region causes a larger number of primordia to be formed in the remaining tissue than in the corresponding tissue of roots where the apical region is retained. It is suggested that a factor or a complex of factors involved in primordium initiation is translocated from the older tissue towards the potential site of primordium initiation in the young tissue which has just completed extension growth. The removal of the apical region of the root is also shown to stimulate lateral root emergence. It is suggested that a factor or complex of factors involved in the development of the primordia subsequent to initiation moves within the root in a similar manner to the factor or factors involved in initiation.
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Claims 5
Claim · model-written summary
Removing the basal root region decreased primordium formation in the remaining root.
- Taxon
- pea
Lathyrus oleraceuse1 - Treatment
- removal of the basal regione0
- Outcome
- number of primordia formede0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the removal of the basal region causes a decrease in the number of primordia formed in the remainder of the root”
e1“pea seedlings”
Claim · model-written summary
Removing the apical root region increased primordium formation relative to roots retaining it.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- removal of the apical regione0
- Outcome
- number of primordiae0
- Direction
- largere0
- Comparator
- roots where the apical region is retainede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the removal of the apical region causes a larger number of primordia to be formed in the remaining tissue than in the corresponding tissue of roots where the apical region is retained”
e1“pea seedlings”
Claim · model-written summary
The authors suggest an initiation factor moves from older root tissue toward young tissue.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- primordium initiatione0
- Qualifier
- translocated from the older tissue towards the potential site of primordium initiation in the young tissuee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a factor or a complex of factors involved in primordium initiation is translocated from the older tissue towards the potential site of primordium initiation in the young tissue”
e1“pea seedlings”
Claim · model-written summary
Removing the apical region stimulated lateral root emergence.
- Taxon
- peaLathyrus oleraceuse1
- Treatment
- removal of the apical region of the roote0
- Outcome
- lateral root emergencee0
- Direction
- stimulatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The removal of the apical region of the root is also shown to stimulate lateral root emergence.”
e1“pea seedlings”
Claim · model-written summary
The authors suggest a later developmental factor moves within the root similarly to the initiation factor.
- Taxon
- peaLathyrus oleraceuse1
- Outcome
- development of the primordia subsequent to initiatione0
- Qualifier
- moves within the root in a similar mannere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a factor or complex of factors involved in the development of the primordia subsequent to initiation moves within the root in a similar manner to the factor or factors involved in initiation”
e1“pea seedlings”