Abstract
ABSTRACT Roots are known to respond to favourable nutrient conditions by increased initiation and growth of lateral roots. The problem studied here was to what extent does this local developmental response depend on the environments of other roots on the same plant. Such dependence could allow for an optimal allocation of resources required for root growth in unpredictable, heterogeneous soils. Pea seedlings ( Pisum sativum var. arvense cv. Dun) were pruned and grown to have two equal root systems, each in an individual container. As expected, these roots responded by increased development to a wide range of nutrient solution concentrations. The local development of these roots, expressed by their dry weight, was a function of the relative rather than the absolute conditions in which they were grown: roots in a given environment developed more rapidly if other roots on the same plant were in poorer than if they were in richer nutrient conditions. The number of lateral initials doubled within 3d after the roots were exposed to optimal nutrient conditions, before any dry weight differences could be detected. This rapid root initiation was also a function of the conditions other roots of the same plant were in. These results mean that root development, and especially lateral root initiation, depends on the integrated effects of the local environment and the internal correlative relations between the roots.
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Claims 4
Claim · model-written summary
Roots increased development across a wide range of nutrient solution concentrations.
- Taxon
- Pisum sativum
Lathyrus oleraceuse1 - Treatment
- a wide range of nutrient solution concentrationse0
- Outcome
- developmente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these roots responded by increased development to a wide range of nutrient solution concentrations.”
t0“Development correlations between roots in heterogeneous environments”
e1“Pea seedlings ( Pisum sativum var. arvense cv. Dun)”
Claim · model-written summary
Roots developed faster in a given environment when other roots had poorer rather than richer nutrient conditions.
- Taxon
- Pisum sativumLathyrus oleraceuse1
- Treatment
- poorere0
- Outcome
- roots in a given environment developede0
- Direction
- more rapidlye0
- Comparator
- richer nutrient conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“roots in a given environment developed more rapidly if other roots on the same plant were in poorer than if they were in richer nutrient conditions.”
t0“Development correlations between roots in heterogeneous environments”
e1“Pea seedlings ( Pisum sativum var. arvense cv. Dun)”
Claim · model-written summary
Lateral initials doubled within 3d under optimal nutrient conditions before dry weight differed.
- Taxon
- Pisum sativumLathyrus oleraceuse1
- Treatment
- optimal nutrient conditionse0
- Outcome
- number of lateral initialse0
- Direction
- doublede0
- Value
- within 3de0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of lateral initials doubled within 3d after the roots were exposed to optimal nutrient conditions, before any dry weight differences could be detected.”
t0“Development correlations between roots in heterogeneous environments”
e1“Pea seedlings ( Pisum sativum var. arvense cv. Dun)”
Claim · model-written summary
Rapid root initiation depended on conditions experienced by other roots of the same plant.
- Taxon
- Pisum sativumLathyrus oleraceuse1
- Organ / stage
- other roots of the same plante0
- Outcome
- rapid root initiatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This rapid root initiation was also a function of the conditions other roots of the same plant were in.”
t0“Development correlations between roots in heterogeneous environments”
e1“Pea seedlings ( Pisum sativum var. arvense cv. Dun)”
The same questions in other papers
fertilization · growth · Lathyrus oleraceus (pea)Positive and negative results
85 papers in the same direction as this paper · 11 in the opposite direction
- no effect
- negative
- negative
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See all 97 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.