Abstract
Currently, applying lime to cadmium (Cd)-contaminated paddy fields to increase pH and reduce Cd availability is an effective method to control excessive Cd levels in rice grain. However, under hydroponic conditions, the impact of increased pH on Cd accumulation in different rice varieties remains unclear. This study employed three rice varieties (Yuzhenxiang, Shaoxiang 100, Xiangwanxian 12) with different Cd accumulation characteristics under different pH and long-term treatment with 1 μM CdCl2, to study the effect of pH on growth and Cd accumulation in different rice varieties. The result showed that as pH shifted from 5 to 8, the SPAD values, shoot dry weight, and plant height of the three rice varieties significantly decreased. The main root length, root volume, and root dry weight of Yuzhenxiang, and Shaoxiang100 significantly decreased. Conversely, the root architecture indicators of Xiangwanxian 12 did not change significantly. As for element accumulation, increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties. Yuzhenxiang significantly reduced Cd content in both the shoots and roots of rice, while Shaoxiang100 significantly increased Cd content in both parts. Xiangwanxian 12 showed a significant increase in Cd content in the shoots but a decrease in the roots. In terms of subcellular distribution, Yuzhenxiang significantly reduced Cd concentrations in the cell wall and organelles of root cells, resulting in lower Cd concentrations in the root tissue. Conversely, Shaoxiang100 significantly increased Cd concentrations in the cell wall, organelles, and soluble fractions of root cells, leading to higher Cd concentrations in the root tissue. Xiangwanxian 12 also exhibited a decrease in Cd concentrations in the cell wall, organelles, and soluble fraction of root cells, resulting in lower Cd concentrations in the root tissue. Additionally, the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100, while no significantly change in Yuzhenxiang and Xiangwanxian 12. These results provide important guidance on the impact of pH on Cd accumulation during the vegetative growth stage of different rice varieties.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 14
Claim · model-written summary
Higher pH decreased SPAD, shoot dry weight, and height in all three varieties.
Oryza sativaNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“as pH shifted from 5 to 8, the SPAD values, shoot dry weight, and plant height of the three rice varieties significantly decreased.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Higher pH decreased root length, volume, and dry weight in Yuzhenxiang and Shaoxiang100.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The main root length, root volume, and root dry weight of Yuzhenxiang, and Shaoxiang100 significantly decreased.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Xiangwanxian 12 root architecture did not change significantly.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root architecture indicators of Xiangwanxian 12 did not change significantly.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Higher pH increased shoot and root Mn in all varieties.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Yuzhenxiang shoot and root Cd decreased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yuzhenxiang significantly reduced Cd content in both the shoots and roots of rice”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Shaoxiang100 shoot and root Cd increased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shaoxiang100 significantly increased Cd content in both parts.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Xiangwanxian 12 shoot Cd increased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xiangwanxian 12 showed a significant increase in Cd content in the shoots but a decrease in the roots.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Xiangwanxian 12 root Cd decreased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xiangwanxian 12 showed a significant increase in Cd content in the shoots but a decrease in the roots.”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Yuzhenxiang root cell wall and organelle Cd decreased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yuzhenxiang significantly reduced Cd concentrations in the cell wall and organelles of root cells”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Shaoxiang100 root cell wall, organelle, and soluble fraction Cd increased.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shaoxiang100 significantly increased Cd concentrations in the cell wall, organelles, and soluble fractions of root cells”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Xiangwanxian 12 root cell fractions had decreased Cd.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Xiangwanxian 12 also exhibited a decrease in Cd concentrations in the cell wall, organelles, and soluble fraction of root cells”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
OsNRAMP5 and OsHMA3 expression increased in Shaoxiang 100.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Expression of OsNRAMP5 and OsHMA3 did not change significantly in Yuzhenxiang.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significantly change in Yuzhenxiang and Xiangwanxian 12”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
Claim · model-written summary
Expression of OsNRAMP5 and OsHMA3 did not change significantly in Xiangwanxian 12.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significantly change in Yuzhenxiang and Xiangwanxian 12”
t0“different rice varieties”
e2“as pH shifted from 5 to 8”
e3“increasing the pH significantly increased the content of Mn in both the shoots and roots of all three varieties.”
e4“the expression of the OsNRAMP5 and OsHMA3 gene was significantly increased in Shaoxiang 100”
The same questions in other papers
ph · cytology · Oryza sativa (rice)Positive and negative results
1 in the opposite direction
- no effect
ph · physiology: pigments · Oryza sativa (rice)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
1 paper more in this group
See all 5 papers →ph · nutrient: content · Oryza sativa (rice)Positive and negative results
5 papers in the same direction as this paper · 6 in the opposite direction
- negative
- negative
- no effect
8 papers more in this group
See all 12 papers →ph · growth · Oryza sativa (rice)Positive and negative results
14 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
22 papers more in this group
See all 26 papers →ph · molecular: expression · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- no effect
- negative
- negative
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.