Abstract
1. The objective of this research was to determine the extent to which regrowth rate after clipping and the specific leaf area (SLA) of genotypes of Lolium perenne were influenced by soil nutrients and endophytic fungi. 2. Twelve infected genotypes were cloned into ramets. Half were treated with a systemic fungicide that greatly reduced endophyte levels; half were untreated and retained high endophyte levels. Ramets of each genotype were subjected to low, medium or high levels of nutrients in a glasshouse for 11 weeks. 3. Plants were clipped at soil level at 11 weeks, allowed to regrow for 14 weeks and clipped again. SLA was determined at 11 and 25 weeks. Regrowth rate was calculated based on changes in leaf area and leaf dry mass between 11 and 25 weeks. 4. As a main effect, endophytes had no influence on regrowth rates and mean endophyte levels, as measured by hyphal counts within the leaves of five genotypes at high and low nutrients, were not correlated with regrowth rates. However, after clipping, regrowth responses to soil nutrients and endophytes were genotype‐specific. Some genotypes in the high endophyte group showed an enhancement of regrowth, whilst others showed no response or a depressive effect of endophytes. 5. At the time of leaf clipping, SLA was significantly affected by genotype, nutrients and endophytes. At medium nutrients, the SLA of high endophyte plants was significantly lower than that of low endophyte plants. However, the SLA of the regrowth was affected by nutrients but not endophytes. Mean endophyte levels, as measured by hyphal counts within the leaves of five genotypes at high and low nutrients, were not correlated with SLA at 11 or 25 weeks. 6. For both high and low endophyte plants, regrowth rate was negatively correlated with SLA. 7. Perennial ryegrass possesses genotypic variation in the ability to regrow following defoliation and this ability is conditioned by abiotic (nutrients) and biotic (endophyte) factors.
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Claims 13
Claim · model-written summary
As a main effect, endophytes had no influence on regrowth rates of Lolium perenne after clipping.
- Taxon
- Lolium perenne
Lolium perennet0 - Treatment
- endophytese1
- Interactor
- endophytese1symbiont
- Outcome
- regrowth ratese1
- Direction
- no influencee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“As a main effect, endophytes had no influence on regrowth rates”
Claim · model-written summary
Mean endophyte levels (hyphal counts in leaves of five genotypes at high and low nutrients) were not correlated with regrowth rates.
- Taxon
- Lolium perenneLolium perennet0
- Interactor
- endophytee1symbiont
- Outcome
- regrowth ratese1
- Direction
- not correlatede1
- Qualifier
- five genotypes at high and low nutrientse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“mean endophyte levels, as measured by hyphal counts within the leaves of five genotypes at high and low nutrients, were not correlated with regrowth rates”
Claim · model-written summary
After clipping, some genotypes in the high endophyte group showed enhanced regrowth, while others showed no response or a depressive effect of endophytes.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- high endophyte groupe1
- Interactor
- endophytese1symbiont
- Outcome
- regrowthe1
- Direction
- enhancemente1
- Qualifier
- whilst others showed no response or a depressive effect of endophytese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“Some genotypes in the high endophyte group showed an enhancement of regrowth, whilst others showed no response or a depressive effect of endophytes”
Claim · model-written summary
At clipping, specific leaf area (SLA) was significantly affected by nutrients.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- nutrientse1
- Outcome
- SLAe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“At the time of leaf clipping, SLA was significantly affected by genotype, nutrients and endophytes”
Claim · model-written summary
At clipping, specific leaf area (SLA) was significantly affected by endophytes.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- endophytese1
- Interactor
- endophytese1symbiont
- Outcome
- SLAe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“At the time of leaf clipping, SLA was significantly affected by genotype, nutrients and endophytes”
Claim · model-written summary
At clipping, specific leaf area (SLA) was significantly affected by genotype.
- Taxon
- Lolium perenneLolium perennet0
- Material
- genotypee1
- Outcome
- SLAe1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“At the time of leaf clipping, SLA was significantly affected by genotype, nutrients and endophytes”
Claim · model-written summary
At medium nutrients, SLA of high endophyte plants was significantly lower than that of low endophyte plants.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- high endophyte plantse1
- Interactor
- endophytee1symbiont
- Outcome
- SLAe1
- Direction
- lowere1
- Qualifier
- At medium nutrientse1
- Comparator
- low endophyte plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“At medium nutrients, the SLA of high endophyte plants was significantly lower than that of low endophyte plants”
Claim · model-written summary
The SLA of the regrowth was affected by nutrients.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- nutrientse1
- Outcome
- SLA of the regrowthe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“the SLA of the regrowth was affected by nutrients but not endophytes”
Claim · model-written summary
The SLA of the regrowth was not affected by endophytes.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- endophytese1
- Interactor
- endophytese1symbiont
- Outcome
- SLA of the regrowthe1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“the SLA of the regrowth was affected by nutrients but not endophytes”
Claim · model-written summary
Mean endophyte levels (hyphal counts in leaves of five genotypes at high and low nutrients) were not correlated with SLA at 11 or 25 weeks.
- Taxon
- Lolium perenneLolium perennet0
- Interactor
- endophytee1symbiont
- Outcome
- SLAe1
- Direction
- not correlatede1
- Qualifier
- at 11 or 25 weekse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“Mean endophyte levels, as measured by hyphal counts within the leaves of five genotypes at high and low nutrients, were not correlated with SLA at 11 or 25 weeks”
Claim · model-written summary
For both high and low endophyte plants, regrowth rate was negatively correlated with SLA.
- Taxon
- Lolium perenneLolium perennet0
- Interactor
- endophytee1symbiont
- Outcome
- regrowth ratee1
- Direction
- negatively correlatede1
- Qualifier
- SLAe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Lolium perenne”
e1“For both high and low endophyte plants, regrowth rate was negatively correlated with SLA”
Claim · model-written summary
Perennial ryegrass possesses genotypic variation in the ability to regrow following defoliation.
- Taxon
- Perennial ryegrassLolium perennee1
- Outcome
- genotypic variation in the ability to regrow following defoliatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Perennial ryegrass possesses genotypic variation in the ability to regrow following defoliation”
Claim · model-written summary
The ability of perennial ryegrass to regrow after defoliation is conditioned by abiotic (nutrients) and biotic (endophyte) factors.
- Taxon
- Perennial ryegrassLolium perennee1
- Treatment
- abiotic (nutrients)e1
- Interactor
- endophytee1symbiont
- Outcome
- ability to regrowe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Perennial ryegrass possesses genotypic variation in the ability to regrow following defoliation and this ability is conditioned by abiotic (nutrients) and biotic (endophyte) factors”
The same questions in other papers
inoculation · growth · Lolium perenne (perennial ryegrass)Positive and negative results
1 paper in the same direction as this paper · 15 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
See all 17 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.