Manganese (Mn) deficiency is a plant disorder that is often confused with, and occurs with, iron deficiency. Most common in poorly drained soils, also where organic matter levels are high. Manganese (Mn) is an important plant micronutrient and is required by plants in the second greatest quantity compared to iron. Manganese Transport Proteins inPlants. As mentioned above, reduced Mn (Mn2+) is the only available form for plants. To maintain an optimal supply, acquisition from the rhizosphere... A manganese level of 20 to 40 ppm (mg kg–) inplant tissue is sufficient for most plants. Toxicity might occur when manganese tissue levels are greater than 400 ppm. -> Manganese facilitates plant absorption of Potassium and regulates it homeostasis. -> Role in the neutralization of reactive oxygen species (ROS). AVAILABILITY... Source of Manganese for plantsManganese is included in the category of the most plentiful and extensively dispersed metals in nature. Manganese affects energy budget by regulating carbohydrate metabolism. Reduction of nitrates inplants is only possible if sufficient Manganese is present. Introduction—Manganese as an Essential Plant NutrientThe Biological Chemistry of ManganeseinPlantsManganesein Metalloenzymes “Inplants, the enzymes that build cell walls need manganese to function. Manganese also plays a key role in photosynthesis,” explains Professor Edgar Peiter, a plant researcher from MLU. Manganese (Mn) is an essential micronutrient with many functional roles inplant metabolism. Manganese acts as an activator and co-factor of hundreds of metalloenzymes inplants. Manganese element is involved in electron transfer reactions inplants and plays a role in chlorophyll production, hence the role of manganeseinplants. ManganeseinPlants localized to the plasma membrane of the proximal side of these cell layers, mediates the export of Mn2+ into the stele (Sasaki et al., 2012; Ueno et al., 2015). Brown PH, Graham RD and Nicholas DJD 1984 The effects of manganese and nitrate supply on the levels of phenolics and lignin in young wheat plants. Plant Soil 81,437–440. Inplants, manganese primarily serves as a cofactor for a range of enzymes involved in critical metabolic pathways.
