Ultramicroelements for Plants

       Ultramicroelements (or nano-elements) are elements whose concentration in the human body ranges from 10^–6 to   10^–12%, with a daily intake not exceeding 20 mcg.

     Ultramicroelements, often termed nano-elements due to their extreme scarcity in biological tissues, represent a sophisticated frontier of plant mineralogy. Occurring at concentrations below 10^–6%, these elements frequently exhibit ambiguous or highly specialized metabolic roles, often acting as potent modulators of enzymatic activity or structural stabilizers at the molecular level. While some ultramicroelements may serve as functional analogs to more abundant minerals, their specific involvement in cellular homeostasis and potential phytotoxicity underscores the intricate complexity of the plant’s molecular interaction networks.

     ULTRAMICROELEMENTS include beryllium, bismuth, tungsten, gallium, gold, cadmium, arsenic, mercury, lead, silver, antimony, thallium, titanium, cesium, zirconium, and others:

• Beryllium inhibits seed germination and the uptake of calcium and magnesium by roots; it induces various effects during phosphorus absorption and degrades certain proteins and enzymes;
• Tungsten is capable of substituting for molybdenum in animals, plants, and bacteria; in doing so, it inhibits the activity of molybdenum-dependent enzymes, such as xanthine oxidase;
• Bismuth is thought to participate in the regulation of photosynthesis, although this fact has not been conclusively proven. There is also some data regarding the antibacterial action of bismuth in plants;
• Gallium, according to certain indications, plays a role in oxygen utilization within plant tissues;
• Gold, upon entering the vascular system of plant roots, is readily translocated to the aerial parts and, together with sodium, potassium, and chlorine, is responsible for maintaining plant cell turgor. Evidence suggests that gold in nano-quantities is essential for maintaining the elasticity of plant cell walls;
• Cadmium is highly toxic to both plant and human organisms. The phytotoxicity of cadmium is attributed to its chemical similarity to zinc and its subsequent substitution in numerous biochemical processes. This leads to the disruption of enzyme activity involved in protein, nucleic acid, and other metabolic pathways, as well as the inhibition of photosynthesis, transpiration, and carbon dioxide fixation;
• Arsenic, in the form of arsenates, plays an important role in agrobiological processes. It has been noted that small quantities of arsenic stimulate plant growth and development;
• Mercury in plant organisms induces the inhibition of cellular respiration, photosynthesis, chlorophyll formation, and gas exchange, while reducing enzymatic activity. The key reaction explaining metabolic disruptions is the interaction of mercury with the sulfhydryl groups of amino acids;
• Lead, in low concentrations, can exert a positive influence on the chlorophyll content in barley and oat leaves, as well as on the intensity of photosynthesis;
• Silver protects plants against fungal, viral, and microbial diseases. The bactericidal, fungicidal, and virucidal action of silver in plants is explained by its ions penetrating the pathogen cell and blocking its essential enzymes;
• Antimony (Stibium) behaves similarly to arsenic in both plant and human organisms: it interacts with the thiol groups of proteins and potentially participates in certain enzymatic reactions as a competitor to vital metabolites;
• Thallium is chemically similar to potassium in the plant organism and competes with it for binding to sulfur-containing groups; at elevated concentrations, thallium leads to the disruption of enzymatic systems, respiration, and photosynthesis;
• Titanium has the capacity to catalyze nitrogen fixation by symbiotic microorganisms during the photo-oxidation of nitrogen compounds in higher plants, as well as in certain photosynthetic processes;
• Cesium is not among the primary components of plant tissues. While cesium is relatively easily absorbed by plants, its root absorption evidently competes with potassium absorption. It can partially substitute for potassium in compounds but cannot replace it in metabolic processes. Physiologically, cesium is similar to rubidium;
• Zirconium in the plant organism exhibits a high affinity for phosphate groups and active sites in ADP and ATP molecules, possessing the ability to degrade certain proteins and enzymes. Data suggests that zirconium stimulates root formation in shoots, thereby enhancing rooting efficiency.