Abstract
Abstract Due to widespread deficiency of Zn in the northwestern plains of India, germplasm screening for identifying less susceptible cultivars of crop plants has become as essential as recommending proper methods of Zn fertilization. To study the relationship between differential susceptibility to Zn deficiency and nutrient composition of plants, 13 cultivars of corn ( Zea mays L.) were grown in the greenhouse at 0 and 2.5 ppm of applied Zn, with uniform N‐P‐K rate, in 4‐kg lots of Zn‐deficient loamy sand of pH 8.5. After 45 days of growth, dry matter yield (DMY), and P, K, Ca, Mg, Fe, Mn, Cu, and Zn in the leaf, culm, and root fractions were measured. Significant cultivar differences in DMY and nutrient composition and the degree of their response to Zn were observed. The reduction in DMY of whole plants due to Zn deficiency ranged from 26.6% (‘Basi’) to 74% (White Opaque 2). However, the differential susceptibility of corn cultivars to Zn deficiency was not related to their Zn absorption characteristics. Zinc‐deficient plants revealed higher concentration of all nutrients (except Zn) in their tissues. The uptake of P was significantly higher in the shoots of Zn‐deficient plants. From regression analysis between the percent reduction in shoot DMY and the relative increase in the concentration of different nutrients in Zn‐deficient plants, only leaf and culm P concentrations were found to bear a high positive correlation (P<0.01) with the susceptibility index of cultivars. Relative increase in Fe concentration of shoots showed a positive correlation and in roots a negative correlation (P<0.05 for both) with the percent reduction in shoot DMY. These results show that the susceptibility to Zn deficiency in corn is intimately related to the P and Fe absorption and transport mechanisms.
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Claims 9
Claim · model-written summary
Corn cultivars differed significantly in dry matter yield, nutrient composition and zinc response.
- Taxon
- corn
Zea mays subsp. mayse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant cultivar differences in DMY and nutrient composition and the degree of their response to Zn were observed”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Zinc deficiency reduced whole-plant dry matter yield by 26.6% in Basi.
- Taxon
- cornZea mays subsp. mayse0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction in DMY of whole plants due to Zn deficiency ranged from 26.6% (‘Basi’) to 74% (White Opaque 2)”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Zinc deficiency reduced whole-plant dry matter yield by 74% in White Opaque 2.
- Taxon
- cornZea mays subsp. mayse0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The reduction in DMY of whole plants due to Zn deficiency ranged from 26.6% (‘Basi’) to 74% (White Opaque 2)”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Cultivar susceptibility to zinc deficiency was unrelated to zinc absorption characteristics.
- Taxon
- cornZea mays subsp. mayse0
- Material
- corn cultivarse0
- Outcome
- differential susceptibilitye0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the differential susceptibility of corn cultivars to Zn deficiency was not related to their Zn absorption characteristics”
Claim · model-written summary
Zinc-deficient plants had higher tissue concentrations of all measured nutrients except zinc.
- Taxon
- cornZea mays subsp. mayse0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Zinc‐deficient plants revealed higher concentration of all nutrients (except Zn) in their tissues”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Zinc-deficient shoots had significantly higher phosphorus uptake.
- Taxon
- cornZea mays subsp. mayse0e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The uptake of P was significantly higher in the shoots of Zn‐deficient plants”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Leaf and culm phosphorus concentrations positively correlated with cultivar susceptibility.
- Taxon
- cornZea mays subsp. mayse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only leaf and culm P concentrations were found to bear a high positive correlation (P<0.01) with the susceptibility index of cultivars”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Shoot iron concentration increases positively correlated with shoot dry matter yield reduction.
- Taxon
- cornZea mays subsp. mayse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative increase in Fe concentration of shoots showed a positive correlation and in roots a negative correlation (P<0.05 for both) with the percent reduction in shoot DMY”
e1“corn ( Zea mays L.)”
Claim · model-written summary
Root iron concentration increases negatively correlated with shoot dry matter yield reduction.
- Taxon
- cornZea mays subsp. mayse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative increase in Fe concentration of shoots showed a positive correlation and in roots a negative correlation (P<0.05 for both) with the percent reduction in shoot DMY”
e1“corn ( Zea mays L.)”
The same questions in other papers
zinc atom · yield · Zea mays (maize)Results differ
390 papers in the same direction as this paper · 47 in the opposite direction · 3 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- positive
- positive
- positive
437 papers more in this group
See all 441 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.