Abstract
S ummary In two pot experiments with a soil deficient in P and N, vesicular‐arbuscular mycorrhizas stimulated the shoot growth of Lolium perenne L. greatest (24%) with the highest levels of applied P and/or N, and where the shoot N and P concentrations approached the normal agronomic range. It is suggested that applied N, and possibly P, resulted in mycorrhizas making a more important contribution to the plant's P or Cu status. Previous experiments purporting to show the mycorrhizal dependency of species are criticized if the levels of nutrients in the soil (other than P) which might have been limiting were not considered. Mycorrhizas reduced root/shoot ratios even in those treatments where a growth response was not detected. There was a negative relationship within treatments between responsiveness to mycorrhizas and the size of the non‐mycorrhizal plant. This may have relevance in plant breeding.
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Claims 4
Claim · model-written summary
Mycorrhizas stimulated shoot growth most, by 24%, at the highest applied P or N levels.
- Taxon
- Lolium perenne L.
Lolium perennee0 - Treatment
- vesicular‐arbuscular mycorrhizase0
- Interactor
- vesicular‐arbuscular mycorrhizase0symbiont
- Outcome
- shoot growthe0
- Direction
- stimulatede0
- Value
- 24%e0
- Qualifier
- highest levels of applied P and/or Ne0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“vesicular‐arbuscular mycorrhizas stimulated the shoot growth of Lolium perenne L. greatest (24%) with the highest levels of applied P and/or N”
Claim · model-written summary
Applied N, and possibly P, may make mycorrhizas contribute more to plant P or Cu status.
LoliumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It is suggested that applied N, and possibly P, resulted in mycorrhizas making a more important contribution to the plant's P or Cu status”
t0“RYEGRASS”
Claim · model-written summary
Mycorrhizas reduced root/shoot ratios even where growth did not respond.
- Treatment
- Mycorrhizase0
- Interactor
- Mycorrhizase0symbiont
- Outcome
- root/shoot ratiose0
- Direction
- reducede0
- Qualifier
- even in those treatments where a growth response was not detectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mycorrhizas reduced root/shoot ratios even in those treatments where a growth response was not detected”
t0“RYEGRASS”
Claim · model-written summary
Responsiveness to mycorrhizas was negatively related to non-mycorrhizal plant size within treatments.
- Interactor
- mycorrhizase0symbiont
- Outcome
- responsiveness to mycorrhizase0
- Direction
- negativee0
- Comparator
- size of the non‐mycorrhizal plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a negative relationship within treatments between responsiveness to mycorrhizas and the size of the non‐mycorrhizal plant”
t0“RYEGRASS”
The same questions in other papers
mycorrhiza · growth · Lolium perenne (perennial ryegrass)Positive and negative results
11 papers in the same direction as this paper · 3 in the opposite direction
- positive
- negative
- negative
11 papers more in this group
See all 15 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.