Abstract
Abstract Mineral nutrient uptake can be enhanced in plants inoculated with vesicular‐arbuscular mycorrhizal fungi (VAMF). The effects of the VAMF Glomus fasciculatum on uptake of P and other mineral nutrients in sorghum [Sorghum bicolor (L.) Moench] were determined in greenhouse experiments for plants grown on a low P (3.6 mg kg‐1) soil (Typic Argiudolls) with P added at 0, 12.5, 25.0, and 37.5 mg kg‐1 soil. Enhancements of growth and mineral nutrient uptake because of the VAMF association decreased as soil applications of P increased above 12.5 nig kg‐1 soil. Root colonization with VAMF without added soil P resulted in increased dry matter yield equivalent to 12.5 mg P kg‐1 soil (25 kg P ha‐1). Total root length colonized with VAMF decreased as soil P level increased. Regardless of P added to the soil, mycorrhizal plants had higher leaf P concentrations and contents than did nonmycorrhizal plants. Enhanced contents, but not necessarily concentrations, of the other mineral nutrients were noted in shoots of mycorrhizal compared to nonmycorrhizal plants. Mycorrhizal plants had enhanced shoot contents of P, K, Zn, and Cu which could not be accounted for by increased growth. The VAMF associations with sorghum roots enhanced mineral nutrient uptake when P was sufficiently low in the soil.
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Claims 6
Claim · model-written summary
Mycorrhizal enhancements of growth and mineral uptake declined as applied soil phosphorus rose above 12.5 mg kg−1.
- Treatment
- soil applications of Pe0
- Interactor
- VAMFe0symbiont
- Outcome
- growth and mineral nutrient uptakee0
- Direction
- decreasede0
- Qualifier
- above 12.5 nig kg‐1 soile0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhancements of growth and mineral nutrient uptake because of the VAMF association decreased as soil applications of P increased above 12.5 nig kg‐1 soil”
t0“sorghum”
Claim · model-written summary
Without added phosphorus, VAMF colonization raised dry matter yield to the equivalent of 12.5 mg P kg−1 soil.
- Treatment
- Root colonization with VAMFe0
- Interactor
- VAMFe0symbiont
- Outcome
- dry matter yielde0
- Direction
- increasede0
- Value
- 12.5 mg P kg‐1 soile0
- Comparator
- without added soil Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root colonization with VAMF without added soil P resulted in increased dry matter yield equivalent to 12.5 mg P kg‐1 soil (25 kg P ha‐1)”
t0“sorghum”
Claim · model-written summary
Colonized root length decreased as soil phosphorus increased.
- Treatment
- soil P levele0
- Interactor
- VAMFe0symbiont
- Outcome
- Total root length colonized with VAMFe0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total root length colonized with VAMF decreased as soil P level increased”
t0“sorghum”
Claim · model-written summary
Mycorrhizal plants had higher leaf phosphorus concentration and content than nonmycorrhizal plants regardless of applied phosphorus.
- Treatment
- mycorrhizal plantse0
- Interactor
- mycorrhizale0symbiont
- Outcome
- leaf P concentrations and contentse0
- Direction
- highere0
- Comparator
- nonmycorrhizal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Regardless of P added to the soil, mycorrhizal plants had higher leaf P concentrations and contents than did nonmycorrhizal plants”
t0“sorghum”
Claim · model-written summary
Mycorrhizal shoots had enhanced content of other mineral nutrients relative to nonmycorrhizal shoots.
- Treatment
- mycorrhizale0
- Interactor
- mycorrhizale0symbiont
- Outcome
- contents, but not necessarily concentrations, of the other mineral nutrientse0
- Direction
- Enhancede0
- Comparator
- nonmycorrhizal plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhanced contents, but not necessarily concentrations, of the other mineral nutrients were noted in shoots of mycorrhizal compared to nonmycorrhizal plants”
t0“sorghum”
Claim · model-written summary
Enhanced shoot phosphorus, potassium and zinc contents in mycorrhizal plants were not accounted for by growth.
- Interactor
- Mycorrhizale0symbiont
- Outcome
- shoot contents of P, K, Zn, and Cue0
- Direction
- enhancede0
- Qualifier
- could not be accounted for by increased growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mycorrhizal plants had enhanced shoot contents of P, K, Zn, and Cu which could not be accounted for by increased growth”
t0“sorghum”
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