Abstract
ABSTRACT Iron (Fe) and zinc (Zn) are essential elements for human health and their deficiencies cause reduced work capacity, physiological and immune system disorders, anemia and even death, being considered primary global public health problems. Agronomic biofortification aims to increase the concentration of these nutrients in the edible part of the plant and, consequently, increase human intake of these nutrients. The aim of this study was to evaluate the effects of Fe and Zn concentrations on the growth, biofortification and quality of lettuce grown in hydroponics. Six treatments corresponding to the combinations of Zn (0.06 and 0.24 mg L-1) and Fe (2, 4 and 8 mg L-1) concentrations were evaluated. Increase of Zn in the nutrient solution positively influenced only leaf Zn contents at 18 days after transplanting the seedlings and ascorbic acid at harvest. On the other hand, the increase in Fe concentration positively influenced the contents of photosynthetic pigments, ascorbic acid and Fe; however, it negatively affected the leaf Zn content, leaf area and leaf dry mass of lettuce. Greater biofortification of lettuce for Fe was observed with the Fe concentration of 8 mg L-1 in the solution.
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Claims 2
Claim · model-written summary
Increasing Zn raised leaf Zn content at 18 days.
- Taxon
- lettuce
Lactuca sativat0 - Treatment
- Increase of Zn in the nutrient solutione0
- Outcome
- leaf Zn contentse0
- Direction
- positively influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase of Zn in the nutrient solution positively influenced only leaf Zn contents at 18 days after transplanting the seedlings”
t0“lettuce”
Claim · model-written summary
Increasing Fe lowered leaf Zn content, leaf area and dry mass.
- Taxon
- lettuceLactuca sativae0
- Treatment
- increase in Fe concentratione0
- Outcome
- leaf Zn content, leaf area and leaf dry masse0
- Direction
- negatively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increase in Fe concentration positively influenced the contents of photosynthetic pigments, ascorbic acid and Fe; however, it negatively affected the leaf Zn content, leaf area and leaf dry mass of lettuce”
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