Abstract
ABSTRACT The spatial distribution of leaf elongation and adaxial epidermal cell production in leaf 6 of maize ( Zea mays L. cv. Cecilia) plants grown in a growth chamber under two contrasting availabilities of P in the soil was investigated. Lower displacement velocities from 32.5 mm from leaf base and a shorter growth zone were found in low P (LP) leaves compared with control leaves. P deficiency significantly diminished maximum relative elemental growth rate and shifted its location closer to the leaf base. Cells were significantly longer in LP than in control leaves for all positions from the leaf base except at the end of the growth zone. For both treatments it took a similar time for a cell situated at the leaf base to reach the limit of the growth zone. The average length of the cell division zone was decreased by 21% in LP leaves. Significant differences were found in cell production and cell division rates from 12.5 mm from the leaf base although maximum values were similar between P treatments. A shorter zone of cell division with lower cell production rates along most of its length was the regulatory event that decreased cell production, and ultimately leaf elongation rates, in P‐deficient maize plants.
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Claims 10
Claim · model-written summary
Low P leaves had lower displacement velocities from 32.5 mm from the leaf base than controls.
- Material
- cv. Ceciliae1
- Organ / stage
- leaf 6e1
- Treatment
- low P (LP)e0
- Outcome
- displacement velocitiese0
- Direction
- Lowere0
- Qualifier
- from 32.5 mm from leaf basee0
- Comparator
- control leavese0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower displacement velocities from 32.5 mm from leaf base and a shorter growth zone were found in low P (LP) leaves compared with control leaves”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
Claim · model-written summary
Low P leaves had a shorter growth zone than controls.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lower displacement velocities from 32.5 mm from leaf base and a shorter growth zone were found in low P (LP) leaves compared with control leaves”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
Claim · model-written summary
P deficiency significantly reduced maximum relative elemental growth rate.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P deficiency significantly diminished maximum relative elemental growth rate and shifted its location closer to the leaf base”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
Claim · model-written summary
P deficiency shifted the location of maximum relative elemental growth rate closer to the leaf base.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P deficiency significantly diminished maximum relative elemental growth rate and shifted its location closer to the leaf base”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
Claim · model-written summary
Cells were significantly longer in low P leaves except at the end of the growth zone.
- Treatment
- LPe2
- Outcome
- Cellse0
- Direction
- longere0
- Qualifier
- except at the end of the growth zonee0
- Comparator
- control leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cells were significantly longer in LP than in control leaves for all positions from the leaf base except at the end of the growth zone”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
e2“low P (LP) leaves”
Claim · model-written summary
Cells at the leaf base took a similar time to reach the growth-zone limit under both treatments.
- Treatment
- low P (LP)e2
- Outcome
- time for a cell situated at the leaf base to reach the limit of the growth zonee0
- Direction
- similare0
- Comparator
- control leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For both treatments it took a similar time for a cell situated at the leaf base to reach the limit of the growth zone”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
e2“low P (LP) leaves compared with control leaves”
Claim · model-written summary
The average cell division zone was 21% shorter in low P leaves.
- Treatment
- LPe0
- Outcome
- average length of the cell division zonee0
- Direction
- decreasede0
- Value
- 21%e0
- Comparator
- control leavese2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The average length of the cell division zone was decreased by 21% in LP leaves”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
e2“low P (LP) leaves compared with control leaves”
Claim · model-written summary
Cell production and division rates differed significantly from 12.5 mm from the leaf base under the P treatments.
- Treatment
- low P (LP)e2
- Outcome
- cell production and cell division ratese0
- Qualifier
- from 12.5 mm from the leaf basee0
- Comparator
- control leavese2
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were found in cell production and cell division rates from 12.5 mm from the leaf base although maximum values were similar between P treatments”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
e2“low P (LP) leaves compared with control leaves”
Claim · model-written summary
Maximum cell production and division rates were similar between P treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum values were similar between P treatments”
e1“leaf 6 of maize ( Zea mays L. cv. Cecilia)”
e2“low P (LP) leaves compared with control leaves”
Claim · model-written summary
A shorter division zone with lower cell production rates explained reduced cell production and leaf elongation in P-deficient maize.
- Organ / stage
- zone of cell divisione0
- Outcome
- leaf elongation ratese0
- Qualifier
- lower cell production ratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A shorter zone of cell division with lower cell production rates along most of its length was the regulatory event that decreased cell production, and ultimately leaf elongation rates, in P‐deficient maize plants”
The same questions in other papers
phosphorus · cytology · Zea mays (maize)Positive and negative results
1 in the opposite direction
- positive
phosphorus · growth · Zea mays (maize)Positive and negative results
251 papers in the same direction as this paper · 51 in the opposite direction · 3 reporting no difference from an alternative
- negative
- no effect
- positive
302 papers more in this group
See all 306 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.