Abstract
Abstract Crop production in acid soils may be limited by several factors, including low pH. Development of acid‐tolerant cultivars requires information about differences in tolerance to low pH among crop genotypes. To determine whether differential responses to nutrient solution pH occurred among seven maize ( Zea mays L.) genotypes, seedlings were grown in a growth chamber in flowing solutions at pH levels ranging from 3.3 to 6.7. Top weights, root lengths and weights, and concentrations of Ca, Mg, Fe, Zn, and Mn in plant tops were determined after 12 d. All genotypes grew well with pH of 4.0 to 5.5, with maximum dry weights of plant tops at pH 4.6 for most of the genotypes. However, all genotypes had necrotic root tips and decreased root lengths at pH 3.3, with relative root lengths (length at pH 3.3/maximum length) ranging from 0.26 to 0.55. Root weights were relatively unaffected by solution pH, but top weights decreased markedly at both pH extremes. Iron concentrations of all genotypes were decreased at pH 6.7, and interveinal chlorosis, resembling Fe deficiency, appeared in the younger leaves. Relative top weights (weight at pH 3.3/maximum weight) averaged 0.79 for Trinidad Grpl&2 and ‘PDMR Comp 1’ and 0.58 for ‘UPCA Varl’, ‘PDMR3’, Kalimpos, and Dikit at pH 3.3, and relative top weights among genotypes were positively correlated (r = 0.85) with Mn concentrations in tops. Based on relative top weight at pH 3.3, the former two genotypes were relatively more tolerant of extremely low pH than those in the latter group.
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 12
Claim · model-written summary
All genotypes grew well at pH 4.0 to 5.5.
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All genotypes grew well with pH of 4.0 to 5.5”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Most genotypes had maximum top dry weight at pH 4.6.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum dry weights of plant tops at pH 4.6 for most of the genotypes”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
At pH 3.3, all genotypes had necrotic root tips.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all genotypes had necrotic root tips and decreased root lengths at pH 3.3”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
At pH 3.3, all genotypes had decreased root lengths, with relative lengths from 0.26 to 0.55.
- Treatment
- pH 3.3e0
- Outcome
- root lengthse0
- Direction
- decreasede0
- Value
- 0.26 to 0.55e0
- Comparator
- maximum lengthe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decreased root lengths at pH 3.3, with relative root lengths (length at pH 3.3/maximum length) ranging from 0.26 to 0.55”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Root weights were relatively unaffected by solution pH.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root weights were relatively unaffected by solution pH”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Top weights fell markedly at both pH extremes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“top weights decreased markedly at both pH extremes”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Iron concentrations decreased at pH 6.7 in all genotypes.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Iron concentrations of all genotypes were decreased at pH 6.7”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Interveinal chlorosis appeared in younger leaves at pH 6.7.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“interveinal chlorosis, resembling Fe deficiency, appeared in the younger leaves”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Trinidad Grpl&2 and PDMR Comp 1 averaged 0.79 relative top weight at pH 3.3.
- Material
- Trinidad Grpl&2 and ‘PDMR Comp 1’e0
- Treatment
- pH 3.3e0
- Outcome
- Relative top weightse0
- Value
- 0.79e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative top weights (weight at pH 3.3/maximum weight) averaged 0.79 for Trinidad Grpl&2 and ‘PDMR Comp 1’”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
UPCA Varl, PDMR3, Kalimpos and Dikit averaged 0.58 relative top weight at pH 3.3.
- Material
- ‘UPCA Varl’, ‘PDMR3’, Kalimpos, and Dikite0
- Treatment
- pH 3.3e0
- Outcome
- Relative top weightse2
- Value
- 0.58e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0.58 for ‘UPCA Varl’, ‘PDMR3’, Kalimpos, and Dikit at pH 3.3”
e1“seven maize ( Zea mays L.) genotypes”
e2“Relative top weights”
Claim · model-written summary
Relative top weight was positively correlated with Mn concentrations in tops, r = 0.85.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative top weights among genotypes were positively correlated (r = 0.85) with Mn concentrations in tops”
e1“seven maize ( Zea mays L.) genotypes”
Claim · model-written summary
Trinidad Grpl&2 and PDMR Comp 1 were relatively more tolerant of very low pH than the latter group.
- Material
- Trinidad Grpl&2 and ‘PDMR Comp 1’e2
- Outcome
- tolerant of extremely low pHe0
- Direction
- more tolerante0
- Comparator
- the latter groupe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the former two genotypes were relatively more tolerant of extremely low pH than those in the latter group”
e1“seven maize ( Zea mays L.) genotypes”
e2“Trinidad Grpl&2 and ‘PDMR Comp 1’”
The same questions in other papers
ph · growth · Zea mays (maize)Results differ
23 papers in the same direction as this paper · 19 in the opposite direction
- negative
- positive
- positive
39 papers more in this group
See all 43 papers →ph · nutrient: content · Zea mays (maize)Positive and negative results
7 papers in the same direction as this paper · 12 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.