IJH_2024v14n3

International Journal of Horticulture, 2024, Vol.14, No.3, 195-206 http://hortherbpublisher.com/index.php/ijh 197 growth. For example, a study demonstrated that SynComs constructed from root-associated microbes significantly promoted soybean growth and nutrient acquisition, leading to increased yields (Wang et al., 2021). In aquaponics, SynComs can be integrated with recirculating aquaculture systems (RAS) to repurpose nutrient-dense effluents as naturally derived nutrient solutions for hydroponic vegetable production, thereby creating a circular bioeconomy (Tetreault et al., 2023). Vertical farming, which often relies on LED lighting and precise environmental controls, can also benefit from SynComs. These microbial communities can be designed to optimize plant health and productivity under the unique conditions of vertical farms (Niu and Masabni, 2018; Alrajhi et al., 2023). Figure 1 Schematic representation of the growth-promotional and defensive functions provided by beneficial bacteria, including participation in the rhizophagy cycle (Adopted from Chiaranunt and White, 2023) Image caption: The host plant (labeled in green) breaks down soil bacteria with ROS, allowing for endophytism and transfer of nutrients and phytohormones; Following this, nutrient-starved bacteria are expelled via root hairs, where they can restore their cell walls; In soil, bacteria resume nutrient scavenging, which includes phosphate and potassium solubilization, nitrogen fixation, and iron sequestration; Nutrient-loaded bacteria (labeled in blue) are subsequently attracted back to the host plant via root exudates, where they are degraded by ROS and nutrient transfer can occur again; Throughout this cycle, beneficial bacteria may also participate in pathogen control through competition, antibiosis, and priming of the host plant’s resistance (Adopted from Chiaranunt and White, 2023)

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