Abstract
Additions of micromolar concentrations of magnesium (Mg) to hydroponics enhance aluminum (Al) tolerance of soybean by increasing citrate secretion from roots and external complexation of toxic Al species. The objective of this study was to assess the ameliorative effect of Mg additions on soybean root elongation into mineralogically different acid soils. Roots of soybean seedlings grew for 28 days into acid soils treated with three Mg levels in their soil solution (Control, 150 and 300 μM) and lime. Root growth in the acid soils and aboveground dry matter responses to the Mg treatments were less than for the lime treatments. Citrate fate in the acid soils revealed that 66–99% of added citrate was either adsorbed or biodegraded, suggesting that root secreting citrate in the soil abundant with Al and iron (Fe) hydroxides potentially reduces the availability to complex rhizotoxic Al. A calcium (Ca) deficiency may have constrained root growth response to the Mg-treated soils.
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Claims 4
Claim · model-written summary
Soybean root growth in acid soils and aboveground dry matter responses to Mg treatments were less than those to lime treatments.
- Taxon
- soybean
Glycine maxt0 - Treatment
- Mg treatmentse0
- Outcome
- Root growth in the acid soils and aboveground dry matter responsese0
- Direction
- lesse0
- Comparator
- lime treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root growth in the acid soils and aboveground dry matter responses to the Mg treatments were less than for the lime treatments”
t0“SOYBEAN”
Claim · model-written summary
66-99% of citrate added to acid soils was either adsorbed or biodegraded.
- Taxon
- soybeanGlycine maxt0
- Outcome
- added citrate was either adsorbed or biodegradede0
- Value
- 66–99%e0
- Setting
- acid soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Citrate fate in the acid soils revealed that 66–99% of added citrate was either adsorbed or biodegraded”
t0“SOYBEAN”
Claim · model-written summary
Root-secreted citrate in soils abundant in Al and Fe hydroxides potentially reduces the availability of citrate to complex rhizotoxic Al.
- Taxon
- soybeanGlycine maxt0
- Compound
- citratee0
- Outcome
- availability to complex rhizotoxic Ale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root secreting citrate in the soil abundant with Al and iron (Fe) hydroxides potentially reduces the availability to complex rhizotoxic Al”
t0“SOYBEAN”
Claim · model-written summary
A calcium deficiency may have constrained root growth response to the Mg-treated soils.
- Taxon
- soybeanGlycine maxt0
- Compound
- calcium (Ca)e0
- Outcome
- root growth responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A calcium (Ca) deficiency may have constrained root growth response to the Mg-treated soils”
t0“SOYBEAN”
The same questions in other papers
magnesium atom · growth · Glycine max (soybean)Positive and negative results
7 papers in the same direction as this paper · 21 in the opposite direction
- no effect
- negative
- positive
25 papers more in this group
See all 29 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.