Augmenting pH Confers to <i>Citrus grandis</i> the Ability to Combat Oxidative Stress Triggered by Manganese Excess.

ABSTRACT: Citrus trees are mainly cultivated in acidic soils. Excessive manganese (Mn) is the second most limiting factor for crop productivity in acidic soils after aluminum toxicity. The roles of reactive oxygen species (ROS) and methylglyoxal (MG) detoxification systems in augmented pH-mediated amelioration of excessive Mn are poorly understood. 'Sour pummelo' (Citrus grandis (L.) Osbeck) seedlings were exposed to nutrient solution at a Mn concentration of 500 (Mn500) or 2 (Mn2) μM and a pH of 3 (P3) or 5 (P5). The increase in pH attenuated Mn500-induced increases in ROS production and MG and malondialdehyde accumulation in roots and leaves. Additionally, the increase in pH enhanced the coordinated detoxification capability of both ROS and methylglyoxal scavenging systems in these tissues

SUBMITTER: Rao RY 

PROVIDER: S-EPMC12787632 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature