Abstract
Organic acid secretion from the roots enables plants to acquire phosphorus (P) which is poorly soluble in soil. We previously reported that when soybeans were cultivated in vermiculite in the presence of insoluble calcium phosphate, as a phosphorus source, sulfur (S) fertilization increased organic acid secretion from the roots and improved P acquisition in soybeans. In the present study, we confirmed that S fertilization increased secretion of organic acids such as citric acid when soybeans were cultivated in Andosols having a strong P fixation capacity. In contrast, concentration of citric acid in soybean roots did not increase by S fertilization. Therefore, the relationship between S nutrition and gene expression of citric acid exporters was investigated to understand the mechanisms of induction of citric acid secretion by S. Further, we verified whether the expression of citric acid transporter genes, GmMATE13 and GmMATE47, is involved in the induction of citric acid secretion from the roots by S fertilization. The expression level of GmMATE13 in roots was significantly increased by S fertilization compared to that without S fertilization. Therefore, our results suggest that S nutrition is involved in inducing GmMATE13 expression and contributes to the excretion of citric acid from the soybean roots.
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Claims 4
Claim · model-written summary
Sulfur fertilization increased organic acid secretion from soybean roots in Andosols.
- Taxon
- soybeans
Glycine maxe0 - Treatment
- S fertilizatione0
- Outcome
- secretion of organic acids such as citric acide0
- Direction
- increasede0
- Setting
- Andosolse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S fertilization increased secretion of organic acids such as citric acid when soybeans were cultivated in Andosols having a strong P fixation capacity”
Claim · model-written summary
Sulfur fertilization did not increase citric acid concentration in soybean roots.
- Taxon
- soybeanGlycine maxe0
- Treatment
- S fertilizatione0
- Outcome
- concentration of citric acid in soybean rootse0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“concentration of citric acid in soybean roots did not increase by S fertilization”
Claim · model-written summary
Sulfur fertilization significantly increased root GmMATE13 expression.
- Taxon
- soybeanGlycine maxt0
- Organ / stage
- rootse0
- Treatment
- S fertilizatione0
- Gene
- GmMATE13e0
- Outcome
- expression level of GmMATE13e0
- Direction
- increasede0
- Comparator
- that without S fertilizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The expression level of GmMATE13 in roots was significantly increased by S fertilization compared to that without S fertilization.”
t0“soybean”
Claim · model-written summary
The authors suggest that sulfur nutrition induces GmMATE13 expression and contributes to citric acid excretion from soybean roots.
- Taxon
- soybeanGlycine maxe0
- Treatment
- S nutritione0
- Gene
- GmMATE13e0
- Outcome
- excretion of citric acid from the soybean rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S nutrition is involved in inducing GmMATE13 expression and contributes to the excretion of citric acid from the soybean roots”
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