Zinc biofortification of hydroponic baby leaf lettuce grown under artificial lighting with elevated wind speed and root zone temperature
Year: 2018
Type: article
Abstract: To examine growth conditions that can increase the critical dietary mineral zinc in leaves of baby leaf red oak lettuce, we investigated zinc accumulation under various conditions, including different zinc concentrations in nutrient solution, wind speeds, and root zone temperatures. A high zinc concentration in the nutrient solution led to greatly increased leaf zinc concentration, but also decreased fresh and dry weights of shoots. In addition, necrosis was observed in leaves at a zinc concentration in the nutrient solution of ≥0.15 mM. By contrast, high wind speed and root zone temperature led to increases in leaf zinc concentration, but slightly decreased fresh and dry weights of shoots. In addition, under high wind speed and root zone temperature, no leaf necrosis was observed. The increase in leaf zinc concentration was attributed to increases in zinc absorption, accompanied by increased transpiration, because water absorption rates increased with wind speed and root zone temperature. Therefore, baby leaf red oak lettuce with high leaf zinc concentration can be produced by increasing wind speed and root zone temperature.
Authors: Yuki SAGO, Naoya WATANABE, Yudai MINAMI
Institution: Yamaguchi University
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W2889949607