Nutrient Delivery System in Crop Plants to Augment Acquisition, Translocation and Utilization Efficiency

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Efficient delivery of nutrients to plants is crucial for optimal growth and development. This publication investigates two nutrient delivery systems: through the root and via foliage. While the root system is primarily responsible for nutrient absorption, foliage can also be an efficient organ for nutrient uptake. The authors explore the possibility of enhancing nutrient absorption by modifying nutrient molecules to be charge-neutral, allowing them to pass through the plasma membrane unhindered. They highlight the negative environmental impacts of commonly used synthetic chelates and propose using artificially synthesized siderophores as a more sustainable alternative. The study investigates the potential of chelated iron foliar application and its impact on gene expression related to iron uptake. Furthermore, the authors emphasize the need for detailed investigation into the efficacy of foliar sprays with Fe-siderophore complexes and the confirmation of charge-neutral molecule passage through leaf plasma membranes. In addition, the publication addresses the challenges associated with inorganic phosphate (Pi) fixation in soil, which limits its availability to root cells. The authors propose a controlled-release technology utilizing nano-clay polymer composites to overcome this issue. By examining the interaction between clay and surface cross-linking polymers, they aim to enhance the slow-release properties of fertilizers, thus reducing P fixation and loss through runoff. Although previous studies have investigated the release behavior of P from nano-composites, crops' response to applying P-loaded nano-composites remains largely unexplored. The publication highlights the scarcity of reports evaluating crop yield response to polymer hydrogels and emphasizes the need to understand the mechanisms underlying nutrient mobilization from these polymers. The authors propose the development of a seed-coating material utilizing nutrient-loaded clay polymer composites, specifically targeting phosphorus (P) delivery to plants during the initial stages of growth. By loading the seed coating material with P, organic acid, and phosphorus-solubilizing bacteria, the researchers aim to improve root growth and seed establishment. The publication outlines the objectives of the study, which include evaluating the efficacy of Fe complexes applied as a foliar spray, identifying novel proteins involved in Fe absorption and translocation, studying the release behavior of the seed coating material loaded with phosphorus, investigating its impact on P uptake efficiency in crops, and finally, combining the most effective seed coating material with the optimal foliar formulation to enhance nutrient uptake efficiency in field conditions. This comprehensive study aims to contribute to developing advanced nutrient delivery systems to improve crop productivity while minimizing environmental impact.
Foliar application, Rice, Soybeans
Pandey R., Sharma S., Barman M. and Bindraban P.S. 2016, Nutrient Delivery System in Crop Plants to Augment Acquisition, Translocation and Utilization Efficiency, VFRC Report 2016/1, VFRC, Washington, D.C., 93 pp.; 13 tables; 63 figs.; 30 ref.