Agronomic biofortification of common bean grain with zinc

Abstract

The objective of this work was to evaluate the effects of the split and combinated application of foliar zinc (ZnF) + soil Zn (ZnS) on Zn concentration in the grains (ZnCG) of common bean (Phaseolus vulgaris). Two experiments were carried out in a greenhouse during two seasons. In the first experiment, two common bean cultivars received six ZnF rates (0, 120, 240, 480, 720, or 1,200 g ha-1), with split applications at the R5, R7, and R8, or R7 and R8, or R8 plant stages. In the second experiment, one cultivar received three ZnS rates (0, 5, or 10 kg ha-1) combined with ZnF rates (0, 1, 1.5, 3, 6, or 10 kg ha-1). In the first experiment, with the ZnF increment, ZnCG increased linearly from 15.3 to 20.7 mg kg-1. ZnF splitting did not affect ZnCG. In the second experiment, ZnF without ZnS did not affect ZnCG. ZnS doubled ZnCG in comparison with the treatment without ZnS application. At 5 kg ha-1 ZnS, the highest ZnCG (67.5 mg kg-1) was obtained with 7.8 kg ha-1 ZnF. At 10 kg ha-1, the highest ZnCG (66 mg kg-1) was obtained with 4.9 kg ha-1 ZnF. ZnF splitting is not advantageous over a single application, and the combination of ZnF and ZnS increases ZnCG in common bean, in greenhouse conditions.

Common Bean Yield and Zinc Use Efficiency in Association with Diazotrophic Bacteria Co-Inoculations

“…Studies determining the impact of applying Zn from 0 to 10 kg ha −1 have demonstrated the potentially improved nutritional quality of bean grains, without toxicity symptoms, in tropical soil [71]. The sole application of Zn may lead to a negative relation with Zn use efficiencies [72]; however, inoculant strains of Bacillus sp. and Pseudomonas sp.…”

Zinc nutrition and human health: Overview and implications

“…Agronomic biofortification of soybean through soil application and foliar application at vegetative growth stage 4 (V4) and 8 (V8), and at reproductive growth stage 4 (R4) exhibited significant enhancement of Zn when it was applied at stage R4 (de Oliveira et al, 2019). In Brazil, 100% enhancement in Zn content was observed for common bean when it was treated with ZnSO 4 (5 kg Zn/ha) as soil fertilizer along with Zn at 7.8 kg/ha as foliar (Cambraia et al, 2019). A recent study has reviewed the conventional strategies for combating the problem of Zn deficiency and throws light on modern genetic technologies to fortify common beans to fight against Zn deficiency (Philipo et al, 2021).…”

Dynamics of Germination Behaviour, Protein Secondary Structure, Technofunctional Properties, Antinutrients, Antioxidant Capacity and Mineral Elements in Germinated Dhaincha

“…Germination caused drastic increase in the Zn content. Zn is predominantly present in the cotyledon of legumes (53) and tends to interact with proteins as well as other macromolecules and reduce its extractability (54). Germination causes modification of cellular structure of the grain by virtue of development of micro cracks and fissures and weakens the bond of Zn with other macromolecules with their consequent better extractability (38).…”