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. 2026 Aug 4;17:1896630. doi: 10.3389/fmicb.2026.1896630

FIGURE 1.

Ten labeled panels display citrus plants in varying conditions and stages. Panels A-F show close-ups of leaves differing in color and texture, including healthy green leaves, leaves with yellowing or darkening, and uneven growth. Panels G-J show whole citrus plants with exposed roots or growing in pots, highlighting differences in overall size, leaf density, and root structure, possibly for comparison of plant health or growth conditions.

Effect of HIF treatment on citrus morphological characteristics. (A–C) HIF-treated plants; (D–F) control plants; (A,D) photos (chlorotic mottling prior to treatment); (B) photos after 12 HIF treatments (leaves green) and (E) control (chlorotic leaves); (C) photos after 20 HIF treatments (leaves dark green and lustrous); (F) control (leaves remained chlorotic); (G) plant after 20 HIF treatments (luxuriant leaves, abundant new root growth); (H) control plant (poorly developed, browned roots); (I) HIF treated plant after 29 months. (J) Pre-treatment photo (chlorotic mottling).