Abstract
The objective of the present study was to evaluate the effect of bicarbonate and high pH treatments separately on shoot and root growth and accumulation of organic acids in the roots of two rice cultivars differing in susceptibility to Zn deficiency. The results indicated that shoot and root dry weight of both cuitivars decreased by the treatments with bicarbonate and high pH and the decrease in shoot and root dry weight were greater when plants grown with bicarbonate than that with high pH. The inhibitory effect of bicarbonate and high pH on shoot and root dry weight of the Zn-efficient rice cultivar (S 101) was less than that of the Zn—inefficient rice cultivar (G1?2). Root length was significantly decreased by bicarbonate and high pH treatments for the Zn-inefficient n'ce cultivar ((3172); whereas was considerably enhanced by bicarbonate and high pH treatments for the Zn-efficient rice cultivar(S101), and the enhancement of root length in the Zn-efficient rice cultivar ($101) was greater when plants grown with bicarbonate than that with high pH. Both bicarbonate and high pH treatments increased the concentrations of organic acids (malic. citric, fumaric and succinic) in the roots of both cultivars, but to a greater extent for the Zn-inet'ficient than for the Zn-efficient cultivars. The results suggest that the impairment of root growth was likely to be the initial action of bicarbonate in inducing Zn-deficiency in low land rice, and the inhibitory effect of bicarbonate on root growth of the Zn-inefticient cultivar might result from high accumulation and an insufficient compartmentation of organic acids in the root cells.
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Claims 14
Claim · model-written summary
Bicarbonate decreased shoot and root dry weight in both cultivars.
- Taxon
- rice
Oryza sativat0 - Treatment
- bicarbonatee0
- Outcome
- shoot and root dry weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot and root dry weight of both cuitivars decreased by the treatments with bicarbonate and high pH”
t0“RICE”
Claim · model-written summary
High pH decreased shoot and root dry weight in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- high pHe0
- Outcome
- shoot and root dry weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shoot and root dry weight of both cuitivars decreased by the treatments with bicarbonate and high pH”
t0“RICE”
Claim · model-written summary
Bicarbonate decreased shoot and root dry weight more than high pH.
- Taxon
- riceOryza sativat0
- Treatment
- bicarbonatee0
- Outcome
- shoot and root dry weighte0
- Direction
- greatere0
- Comparator
- high pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the decrease in shoot and root dry weight were greater when plants grown with bicarbonate than that with high pH”
t0“RICE”
Claim · model-written summary
Growth inhibition was less in Zn-efficient S 101 than Zn-inefficient G1?2.
- Taxon
- riceOryza sativae0
- Material
- S 101e0
- Outcome
- inhibitory effect of bicarbonate and high pH on shoot and root dry weighte0
- Direction
- lesse0
- Comparator
- G1?2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The inhibitory effect of bicarbonate and high pH on shoot and root dry weight of the Zn-efficient rice cultivar (S 101) was less than that of the Zn—inefficient rice cultivar (G1?2)”
Claim · model-written summary
Bicarbonate significantly decreased root length in Zn-inefficient cultivar.
- Taxon
- RICEOryza sativat0
- Material
- (3172e0
- Treatment
- bicarbonatee0
- Outcome
- Root lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root length was significantly decreased by bicarbonate and high pH treatments for the Zn-inefficient n'ce cultivar ((3172)”
t0“RICE”
Claim · model-written summary
High pH significantly decreased root length in Zn-inefficient cultivar.
- Taxon
- RICEOryza sativat0
- Treatment
- high pHe0
- Outcome
- Root lengthe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root length was significantly decreased by bicarbonate and high pH treatments for the Zn-inefficient n'ce cultivar ((3172)”
t0“RICE”
Claim · model-written summary
Bicarbonate enhanced root length in Zn-efficient S101.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was considerably enhanced by bicarbonate and high pH treatments for the Zn-efficient rice cultivar(S101)”
t0“ROOT GROWTH”
e1“Root length was significantly decreased by bicarbonate and high pH treatments for the Zn-inefficient n'ce cultivar ((3172)”
Claim · model-written summary
High pH enhanced root length in Zn-efficient S101.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“was considerably enhanced by bicarbonate and high pH treatments for the Zn-efficient rice cultivar(S101)”
t0“ROOT GROWTH”
e1“Root length was significantly decreased by bicarbonate and high pH treatments for the Zn-inefficient n'ce cultivar ((3172)”
Claim · model-written summary
Bicarbonate enhanced root length more than high pH in Zn-efficient cultivar.
- Taxon
- riceOryza sativae0
- Material
- $101e0
- Treatment
- bicarbonatee0
- Outcome
- root lengthe0
- Direction
- greatere0
- Comparator
- high pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the enhancement of root length in the Zn-efficient rice cultivar ($101) was greater when plants grown with bicarbonate than that with high pH”
Claim · model-written summary
Bicarbonate increased root organic acids in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- bicarbonatee0
- Outcome
- concentrations of organic acids (malic. citric, fumaric and succinic) in the rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both bicarbonate and high pH treatments increased the concentrations of organic acids (malic. citric, fumaric and succinic) in the roots of both cultivars”
t0“RICE”
Claim · model-written summary
High pH increased root organic acids in both cultivars.
- Taxon
- riceOryza sativat0
- Treatment
- high pHe0
- Outcome
- concentrations of organic acids (malic. citric, fumaric and succinic) in the rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both bicarbonate and high pH treatments increased the concentrations of organic acids (malic. citric, fumaric and succinic) in the roots of both cultivars”
t0“RICE”
Claim · model-written summary
Organic acid increase was greater in Zn-inefficient than efficient cultivars.
- Taxon
- RICEOryza sativat0
- Outcome
- ACCUMULATION OF ORGANIC ACIDESt0
- Direction
- greatere0
- Comparator
- Zn-efficient cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“to a greater extent for the Zn-inet'ficient than for the Zn-efficient cultivars”
t0“ROOT GROWTH AND ACCUMULATION OF ORGANIC ACIDES IN TWO RICE CULTIVARS”
Claim · model-written summary
Authors suggest impaired root growth initiates bicarbonate-induced Zn deficiency.
- Taxon
- riceOryza sativae0
- Treatment
- bicarbonatee0
- Outcome
- Zn-deficiencye0
- Qualifier
- impairment of root growthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the impairment of root growth was likely to be the initial action of bicarbonate in inducing Zn-deficiency in low land rice”
Claim · model-written summary
Authors suggest organic-acid accumulation and compartmentation explain inhibited root growth.
- Taxon
- RICEOryza sativat0
- Treatment
- bicarbonatee0
- Outcome
- inhibitory effect of bicarbonate on root growthe0
- Qualifier
- high accumulation and an insufficient compartmentation of organic acids in the root cellse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inhibitory effect of bicarbonate on root growth of the Zn-inefticient cultivar might result from high accumulation and an insufficient compartmentation of organic acids in the root cells”
t0“RICE”
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