Abstract
BACKGROUND: Zinc (Zn) deficiency in calcareous soils limits crop productivity and restricts nutritional quality in edible plant products. AIMS: This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions. METHODS: A field experiment was conducted using a randomized complete block design with three replications. Zn(glycine)₂ [Zn(Gly)₂], Zn(methionine)₂ [Zn(Met)₂], and ZnSO₄ were applied through seed priming (2% solution), fertigation (4 L ha⁻¹ for Zn-aminochelates and 40 kg ha⁻¹ for ZnSO₄), and foliar spray (0.2% w/v, 2 L ha⁻¹ per application) at key growth stages. Control plots received untreated seeds or water. RESULTS: Compared with ZnSO₄, Zn-aminochelates significantly improved seed yield, biomass production, and Zn accumulation. Foliar application of [Zn(Met)₂] was the most effective treatment, increasing seed yield by approximately 85%, oil yield by about 2.5-fold, and seed Zn uptake by nearly twofold, while also enhancing physiological traits, antioxidant enzyme activities, and protein accumulation. The N/S ratio decreased concomitantly with increased seed oil content. CONCLUSIONS: The superior performance of methionine-based Zn chelates is likely linked to their role in sulfur metabolism, enhanced Zn mobility, and improved antioxidant regulation. Overall, foliar application of Zn-aminochelates represents an effective and practical agronomic biofortification strategy for improving productivity and nutritional quality of sunflower grown on calcareous soils.
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Claims 8
Claim · model-written summary
Zn-aminochelates significantly improved seed yield, biomass production and Zn accumulation compared with ZnSO4.
- Taxon
- sunflower
Helianthus annuuse1 - Treatment
- Zn-aminochelatese2
- Outcome
- seed yield, biomass production, and Zn accumulatione2
- Direction
- improvede2
- Comparator
- ZnSO₄e2
- Setting
- calcareous soil conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e2“Compared with ZnSO₄, Zn-aminochelates significantly improved seed yield, biomass production, and Zn accumulation”
Claim · model-written summary
Foliar application of Zn(Met)2 was the most effective treatment, increasing seed yield by approximately 85%.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- Foliar application of [Zn(Met)₂]e3
- Outcome
- seed yielde3
- Direction
- increasinge3
- Value
- approximately 85%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e3“Foliar application of [Zn(Met)₂] was the most effective treatment, increasing seed yield by approximately 85%, oil yield by about 2.5-fold, and seed Zn uptake by nearly twofold, while also enhancing physiological traits, antioxidant enzyme activities, and protein accumulation”
Claim · model-written summary
Foliar Zn(Met)2 increased oil yield about 2.5-fold.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- Foliar application of [Zn(Met)₂]e3
- Outcome
- oil yielde3
- Direction
- increasinge3
- Value
- about 2.5-folde3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e3“Foliar application of [Zn(Met)₂] was the most effective treatment, increasing seed yield by approximately 85%, oil yield by about 2.5-fold, and seed Zn uptake by nearly twofold, while also enhancing physiological traits, antioxidant enzyme activities, and protein accumulation”
Claim · model-written summary
Foliar Zn(Met)2 increased seed Zn uptake nearly twofold.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- Foliar application of [Zn(Met)₂]e3
- Outcome
- seed Zn uptakee3
- Direction
- increasinge3
- Value
- nearly twofolde3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e3“Foliar application of [Zn(Met)₂] was the most effective treatment, increasing seed yield by approximately 85%, oil yield by about 2.5-fold, and seed Zn uptake by nearly twofold, while also enhancing physiological traits, antioxidant enzyme activities, and protein accumulation”
Claim · model-written summary
Foliar Zn(Met)2 enhanced physiological traits, antioxidant enzyme activities and protein accumulation.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- Foliar application of [Zn(Met)₂]e3
- Outcome
- physiological traits, antioxidant enzyme activities, and protein accumulatione3
- Direction
- enhancinge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e3“Foliar application of [Zn(Met)₂] was the most effective treatment, increasing seed yield by approximately 85%, oil yield by about 2.5-fold, and seed Zn uptake by nearly twofold, while also enhancing physiological traits, antioxidant enzyme activities, and protein accumulation”
Claim · model-written summary
The N/S ratio decreased concomitantly with increased seed oil content.
- Taxon
- sunflowerHelianthus annuuse1
- Organ / stage
- seede4
- Outcome
- N/S ratioe4
- Direction
- decreasede4
- Qualifier
- concomitantly with increased seed oil contente4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e4“The N/S ratio decreased concomitantly with increased seed oil content”
Claim · model-written summary
The superior performance of methionine-based Zn chelates is likely linked to their role in sulfur metabolism, Zn mobility and antioxidant regulation.
- Taxon
- sunflowerHelianthus annuuse1
- Treatment
- methionine-based Zn chelatese5
- Outcome
- superior performancee5
- Qualifier
- role in sulfur metabolism, enhanced Zn mobility, and improved antioxidant regulatione5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“This study assessed the effectiveness of Zn-aminochelates, compared with conventional ZnSO₄, applied through various application methods, in improving physiological traits, growth, yield, and seed Zn biofortification in sunflower (Helianthus annuus L.) under calcareous soil conditions”
e5“The superior performance of methionine-based Zn chelates is likely linked to their role in sulfur metabolism, enhanced Zn mobility, and improved antioxidant regulation”
Claim · model-written summary
Foliar application of Zn-aminochelates is an effective and practical biofortification strategy for sunflower productivity and nutritional quality on calcareous soils.
- Taxon
- sunflowerHelianthus annuuse6
- Treatment
- foliar application of Zn-aminochelatese6
- Outcome
- productivity and nutritional qualitye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Overall, foliar application of Zn-aminochelates represents an effective and practical agronomic biofortification strategy for improving productivity and nutritional quality of sunflower grown on calcareous soils”
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- no effect
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See all 158 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.