Abstract
Abstract A hydroponic experiment was carried out to study effects of chromium (Cr) stress on the subcellular distribution and chemical form of Ca, Mg, Fe, and Zn in two rice genotypes differing in Cr accumulation. The results showed that Ca, Mg, Fe, and Zn ions were mainly located in cell walls and vacuoles in roots. However, large amounts of metal ions were transferred from the vacuole to the nucleus and to other functional organelles in shoots. Chromium concentrations in the nutrient solution of 50 μM and above significantly decreased Ca concentrations in the chloroplast/trophoplast, the nucleus, and in mitochondria. It further increased Mg concentrations in the nucleus and in mitochondria, as well as Zn and Fe concentrations in the chloroplast/trophoplast. These Cr‐induced changes in ion concentrations were associated with a significant reduction in plant biomass. It is suggested that Cr stress interferes with the functions of mineral nutrients in rice plants, thus causing a serious inhibition of plant growth. The chemical forms of the four nutrients were determined by successive extraction. Except for Ca, which was mainly chelated with insoluble phosphate and oxalic acid, Mg, Zn, and Fe were extractable by 80% ethanol, d‐H 2 O, and 1μM NaCl. The results indicated that these low–molecular weight compounds, such as organic acids and amino acids, may play an important role in deposition and translocation of Mg, Zn, and Fe in the xylem system of rice plants.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Ca, Mg, Fe and Zn were mainly in rice root cell walls and vacuoles.
- Taxon
- rice
Oryza sativat0 - Organ / stage
- rootse0
- Outcome
- Ca, Mg, Fe, and Zn ionse0
- Qualifier
- cell walls and vacuolese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca, Mg, Fe, and Zn ions were mainly located in cell walls and vacuoles in roots.”
t0“rice”
Claim · model-written summary
Large amounts of metal ions shifted from shoot vacuoles to nuclei and other organelles.
- Taxon
- riceOryza sativat0
- Organ / stage
- shootse0
- Outcome
- metal ionse0
- Direction
- transferrede0
- Qualifier
- from the vacuole to the nucleus and to other functional organellese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“large amounts of metal ions were transferred from the vacuole to the nucleus and to other functional organelles in shoots.”
t0“rice”
Claim · model-written summary
Chromium at 50 μM and above decreased Ca in chloroplast/trophoplast, nucleus and mitochondria.
- Taxon
- riceOryza sativat0
- Organ / stage
- chloroplast/trophoplast, the nucleus, and in mitochondriae0
- Treatment
- Chromium concentrations in the nutrient solution of 50 μM and abovee0
- Outcome
- Ca concentrationse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chromium concentrations in the nutrient solution of 50 μM and above significantly decreased Ca concentrations in the chloroplast/trophoplast, the nucleus, and in mitochondria.”
t0“rice”
Claim · model-written summary
Chromium increased Mg in the nucleus and mitochondria.
- Taxon
- riceOryza sativat0
- Organ / stage
- nucleus and in mitochondriae0
- Treatment
- Chromium concentrations in the nutrient solution of 50 μM and abovee1
- Outcome
- Mg concentrationse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It further increased Mg concentrations in the nucleus and in mitochondria”
e1“Chromium concentrations in the nutrient solution of 50 μM and above”
t0“rice”
Claim · model-written summary
Chromium increased Zn in chloroplast/trophoplast.
- Taxon
- riceOryza sativat0
- Organ / stage
- chloroplast/trophoplaste0
- Treatment
- Chromium concentrations in the nutrient solution of 50 μM and abovee2
- Outcome
- Zne0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn and Fe concentrations in the chloroplast/trophoplast”
e1“It further increased Mg concentrations”
e2“Chromium concentrations in the nutrient solution of 50 μM and above”
t0“rice”
Claim · model-written summary
Chromium increased Fe in chloroplast/trophoplast.
- Taxon
- riceOryza sativat0
- Organ / stage
- chloroplast/trophoplaste0
- Treatment
- Chromium concentrations in the nutrient solution of 50 μM and abovee2
- Outcome
- Fe concentrationse0
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zn and Fe concentrations in the chloroplast/trophoplast”
e1“It further increased Mg concentrations”
e2“Chromium concentrations in the nutrient solution of 50 μM and above”
t0“rice”
Claim · model-written summary
Chromium-induced ion changes were associated with reduced rice biomass.
- Taxon
- riceOryza sativat0
- Treatment
- Cr‐induced changes in ion concentrationse0
- Outcome
- plant biomasse0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These Cr‐induced changes in ion concentrations were associated with a significant reduction in plant biomass.”
t0“rice”
Claim · model-written summary
Chromium stress was suggested to interfere with mineral nutrient functions and inhibit rice growth.
- Taxon
- riceOryza sativae0
- Treatment
- Cr stresse0
- Outcome
- plant growthe0
- Direction
- inhibitione0
- Qualifier
- functions of mineral nutrientse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cr stress interferes with the functions of mineral nutrients in rice plants, thus causing a serious inhibition of plant growth.”
Claim · model-written summary
Ca was mainly chelated with insoluble phosphate and oxalic acid.
- Taxon
- riceOryza sativat0
- Outcome
- Ca, which was mainly chelated with insoluble phosphate and oxalic acide0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca, which was mainly chelated with insoluble phosphate and oxalic acid”
t0“rice”
Claim · model-written summary
Mg, Zn and Fe were extractable by 80% ethanol, water and NaCl.
- Taxon
- riceOryza sativat0
- Outcome
- Mg, Zn, and Fe were extractablee0
- Qualifier
- 80% ethanol, d‐H 2 O, and 1μM NaCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mg, Zn, and Fe were extractable by 80% ethanol, d‐H 2 O, and 1μM NaCl.”
t0“rice”
Claim · model-written summary
Low molecular weight compounds may aid Mg, Zn and Fe deposition and xylem translocation.
- Taxon
- riceOryza sativae0
- Organ / stage
- xylem systeme0
- Compound
- organic acids and amino acidse0
- Outcome
- deposition and translocation of Mg, Zn, and Fee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“low–molecular weight compounds, such as organic acids and amino acids, may play an important role in deposition and translocation of Mg, Zn, and Fe in the xylem system of rice plants.”
The same questions in other papers
chromium atom · nutrient: content · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →fertilization · nutrient: content · Oryza sativa (rice)Positive and negative results
60 papers in the same direction as this paper · 932 in the opposite direction
- positive
- positive
- positive
989 papers more in this group
See all 993 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.