Abstract
Abstract Influence of genetic variability on Zn response in recently improved corn ( Zea mays L.) genotypes has not been investigated. Therefore, eight genotypes representing indigenous, hybrid, and composite varieties, were evaluated in the greenhouse using a Zn deficient loamy sand soil (Typic Torripsamments) at 0 (original soil), 5, and 10 ppm Zn applied to the soil. Zinc deficiency symptoms, dry matter yield response (6 weeks after sowing), Zn concentration, and P/Zn and Fe/Zn ratios were the criteria for evaluation. There was considerable variation among the eight genotypes in the severity of Zn deficiency symptoms, growth depression, Zn concentration, P/Zn, and Fe/Zn ratios under Zn stress conditions. The depression in shoot and root dry matter yield under Zn stress conditions ranged from 78 to 95 and 72 to 94%, respectively, as compared to 5 ppm supplemental Zn level. Zinc concentration in different genotypes under Zn stress condition varied from 7.4 to 20.5 ppm. The differential response among the genotypes was found to be associated with their capability to exploit soil Zn and/or translocate it to the shoot. The contribution of P/Zn and/or Fe/Zn balance in tissues to the variability in Zn responses was not significant.
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Claims 6
Claim · model-written summary
Corn genotypes varied considerably in the severity of Zn deficiency symptoms and growth depression under Zn stress.
- Material
- eight genotypese1
- Treatment
- Zn stress conditionse1
- Outcome
- severity of Zn deficiency symptoms, growth depressione1
- Qualifier
- considerable variatione1
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“There was considerable variation among the eight genotypes in the severity of Zn deficiency symptoms, growth depression, Zn concentration, P/Zn, and Fe/Zn ratios under Zn stress conditions”
Claim · model-written summary
Corn genotypes varied considerably in Zn concentration, P/Zn and Fe/Zn ratios under Zn stress.
- Material
- eight genotypese1
- Treatment
- Zn stress conditionse1
- Outcome
- Zn concentration, P/Zn, and Fe/Zn ratiose1
- Qualifier
- considerable variatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e1“There was considerable variation among the eight genotypes in the severity of Zn deficiency symptoms, growth depression, Zn concentration, P/Zn, and Fe/Zn ratios under Zn stress conditions”
Claim · model-written summary
Shoot and root dry matter yield depression under Zn stress was 78 to 95 and 72 to 94%, respectively, relative to 5 ppm supplemental Zn.
- Treatment
- Zn stress conditionse2
- Outcome
- shoot and root dry matter yielde2
- Direction
- depressione2
- Value
- 78 to 95 and 72 to 94%e2
- Qualifier
- respectivelye2
- Comparator
- 5 ppm supplemental Zn levele2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e2“The depression in shoot and root dry matter yield under Zn stress conditions ranged from 78 to 95 and 72 to 94%, respectively, as compared to 5 ppm supplemental Zn level”
Claim · model-written summary
Zn concentration in different corn genotypes under Zn stress varied from 7.4 to 20.5 ppm.
- Material
- different genotypese3
- Treatment
- Zn stress conditione3
- Outcome
- Zinc concentratione3
- Value
- 7.4 to 20.5 ppme3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e3“Zinc concentration in different genotypes under Zn stress condition varied from 7.4 to 20.5 ppm”
Claim · model-written summary
Differential response among corn genotypes was associated with their capability to exploit soil Zn and/or translocate it to the shoot.
- Outcome
- differential response among the genotypese4
- Qualifier
- capability to exploit soil Zn and/or translocate it to the shoote4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e4“The differential response among the genotypes was found to be associated with their capability to exploit soil Zn and/or translocate it to the shoot”
Claim · model-written summary
The P/Zn and Fe/Zn balance in tissues did not significantly contribute to the variability in Zn responses of corn.
- Outcome
- contribution of P/Zn and/or Fe/Zn balance in tissues to the variability in Zn responsese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn ( Zea mays L.)”
e5“The contribution of P/Zn and/or Fe/Zn balance in tissues to the variability in Zn responses was not significant”
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