Abstract
Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum . Effects on plant growth and phosphate uptake were examined. Isolates of S. calospora (including the one used here) have been shown by others to vary in their stimulation of plant growth, and appear to be inefficient in the transfer of P from the fungus to the host. Our hypothesis was that such isolates of S. calospora may be more aggressive colonizers than other fungi, thus preventing growth increases or producing strong growth depressions in the host plant. In fact, inoculation with either fungus increased growth of plants in their respective soils both low in P (P 0 ) and with added P (P 1 ) by 42 d. The effect on growth due to mycorrhizal symbiosis (i.e. mycorrhizal growth response, % MGR) at 42 d was higher in plants grown in P 0 soil. Plants colonized by Glomus sp. ‘City Beach’ had a greater % MGR than plants colonized by S. calospora . Both fungi colonized plants to high levels. The percentage of root length colonized was higher in P 0 soil than in P 1 soil at 21 d. The internal development of S. calospora appeared less affected by addition of P than Glomus sp. ‘City Beach’ at the early harvests. Formation of arbuscules followed the same trends as total colonization. Shoot P concentration was significantly higher in mycorrhizal plants than in non‐mycorrhizal plants, by 21 d in P 1 soil and by 28 d in P 0 soil. Different percentage responses to added P based on total plant dry weight (% PGR) were observed at 28 and 42 d between the plants colonized by the two fungi. The increased P content due to mycorrhizal colonization (% MPR) differed with soil P. For both fungi grown in their respective soils, the response was greater in plants grown in P 0 soil. Although the isolate of S. calospora used is an aggressive arbuscular mycorrhizal fungus with some hosts, it promotes a strong positive plant growth response in A. porrum after a mild initial growth depression.
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Claims 5
Claim · model-written summary
Inoculation with either arbuscular mycorrhizal fungus increased leek plant growth by 42 days.
- Taxon
- Allium porrum
Allium ampeloprasume0 - Treatment
- inoculation with either funguse1
- Interactor
- arbuscular mycorrhizal fungie0symbiont
- Outcome
- growth of plantse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum”
e1“In fact, inoculation with either fungus increased growth of plants in their respective soils both low in P (P 0 ) and with added P (P 1 ) by 42 d”
Claim · model-written summary
The mycorrhizal growth response at 42 days was higher in leek grown in low-P soil.
- Taxon
- Allium porrumAllium ampeloprasume0
- Treatment
- mycorrhizal symbiosise2
- Outcome
- mycorrhizal growth responsee2
- Direction
- highere2
- Setting
- P 0 soile2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum”
e2“The effect on growth due to mycorrhizal symbiosis (i.e. mycorrhizal growth response, % MGR) at 42 d was higher in plants grown in P 0 soil”
Claim · model-written summary
Plants colonized by Glomus sp. City Beach had a greater mycorrhizal growth response than plants colonized by S. calospora.
- Taxon
- Allium porrumAllium ampeloprasume0
- Interactor
- Glomus sp. ‘City Beach’e3symbiont
- Second interactor
- S. calosporaScutellospora calosporae3symbiont
- Outcome
- % MGRe3
- Direction
- greatere3
- Comparator
- plants colonized by S. calosporae3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum”
e3“Plants colonized by Glomus sp. ‘City Beach’ had a greater % MGR than plants colonized by S. calospora”
Claim · model-written summary
Shoot P concentration was significantly higher in mycorrhizal leek than in non-mycorrhizal leek, by 21 days in P1 soil and by 28 days in P0 soil.
- Taxon
- Allium porrumAllium ampeloprasume0
- Treatment
- mycorrhizal plantse4
- Outcome
- Shoot P concentratione4
- Direction
- highere4
- Setting
- P 1 soile4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum”
e4“Shoot P concentration was significantly higher in mycorrhizal plants than in non‐mycorrhizal plants, by 21 d in P 1 soil and by 28 d in P 0 soil”
Claim · model-written summary
S. calospora promotes a strong positive growth response in leek after a mild initial growth depression.
- Taxon
- Allium porrumAllium ampeloprasume0
- Interactor
- S. calosporaScutellospora calosporae5symbiont
- Outcome
- plant growth responsee5
- Direction
- positivee5
- Qualifier
- after a mild initial growth depressione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two arbuscular mycorrhizal fungi, Scutellospora calospora and Glomus sp. ‘City Beach’, were grown in soil conditions suitable for colonization of Allium porrum”
e5“Although the isolate of S. calospora used is an aggressive arbuscular mycorrhizal fungus with some hosts, it promotes a strong positive plant growth response in A. porrum after a mild initial growth depression”
The same questions in other papers
inoculation · growth · Allium ampeloprasum (leek)Positive and negative results
6 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- negative
6 papers more in this group
See all 10 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.