Abstract
Using growth-analysis techniques, the variation in relative growth-rate (RGR) and its components, net assimilation rate (NAR), and leaf-area ratio (LAR), was examined in 18 populations of L. perenne, six of L. multiflorum, and two hybrid cultivars from contrasting climatic and agronomic origins, grown at low and high light intensities in the glasshouse. Significant differences between populations were found for RGR, NAR, and LAR at both light intensities. At both intensities the annual or biennial multiflorum group had a greater LAR and a lower specific leaf weight and chlorophyll content than the perennial perenne group. At the low intensity this was compensated by a greater NAR in the perenne group, with no resultant difference in RGR. At the high intensity there was no difference between the groups in NAR, and hence a greater RGR in the multiflorum group. Within the perenne and multiflorum groups, at both light intensities, the variation between populations in RGR was based on differences in NAR rather than in LAR. There was no regular correlation of NAR with either specific leaf weight, or chlorophyll content at either light intensity, though at low light intensity it was significantly correlated with shoot-root ratio.
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Claims 11
Claim · model-written summary
RGR, NAR and LAR differed significantly between Lolium populations at both light intensities.
- Outcome
- RGR, NAR, and LARe1
LoliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“Significant differences between populations were found for RGR, NAR, and LAR at both light intensities”
Claim · model-written summary
The multiflorum group had a greater leaf-area ratio than the perenne group at both light intensities.
- Material
- multiflorum groupe1
- Outcome
- LARe1
- Direction
- greatere1
- Qualifier
- At both intensitiese1
- Comparator
- perennial perenne groupe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At both intensities the annual or biennial multiflorum group had a greater LAR and a lower specific leaf weight and chlorophyll content than the perennial perenne group”
Claim · model-written summary
The multiflorum group had a lower specific leaf weight than the perenne group at both light intensities.
- Material
- multiflorum groupe1
- Outcome
- specific leaf weighte1
- Direction
- lowere1
- Qualifier
- At both intensitiese1
- Comparator
- perennial perenne groupe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At both intensities the annual or biennial multiflorum group had a greater LAR and a lower specific leaf weight and chlorophyll content than the perennial perenne group”
Claim · model-written summary
The multiflorum group had lower chlorophyll content than the perenne group at both light intensities.
- Material
- multiflorum groupe1
- Outcome
- chlorophyll contente1
- Direction
- lowere1
- Qualifier
- At both intensitiese1
- Comparator
- perennial perenne groupe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At both intensities the annual or biennial multiflorum group had a greater LAR and a lower specific leaf weight and chlorophyll content than the perennial perenne group”
Claim · model-written summary
At low light intensity the perenne group had a greater NAR, which compensated for its lower LAR.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At the low intensity this was compensated by a greater NAR in the perenne group, with no resultant difference in RGR”
Claim · model-written summary
At low light intensity there was no resultant difference in RGR between the perenne and multiflorum groups.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At the low intensity this was compensated by a greater NAR in the perenne group, with no resultant difference in RGR”
Claim · model-written summary
At high light intensity there was no difference in NAR between the groups.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At the high intensity there was no difference between the groups in NAR, and hence a greater RGR in the multiflorum group”
Claim · model-written summary
At high light intensity the multiflorum group had a greater RGR than the perenne group.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“At the high intensity there was no difference between the groups in NAR, and hence a greater RGR in the multiflorum group”
Claim · model-written summary
Variation between Lolium populations in RGR was based on differences in NAR rather than in LAR at both light intensities.
- Outcome
- variation between populations in RGRe1
- Qualifier
- based on differences in NAR rather than in LARe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“Within the perenne and multiflorum groups, at both light intensities, the variation between populations in RGR was based on differences in NAR rather than in LAR”
Claim · model-written summary
There was no regular correlation of NAR with specific leaf weight or chlorophyll content at either light intensity.
- Treatment
- light intensitye1
- Outcome
- NARe1
- Direction
- no regular correlatione1
- Comparator
- specific leaf weight, or chlorophyll contente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“There was no regular correlation of NAR with either specific leaf weight, or chlorophyll content at either light intensity”
Claim · model-written summary
At low light intensity NAR was significantly correlated with shoot-root ratio.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium Populations”
e1“at low light intensity it was significantly correlated with shoot-root ratio”