1、Potassium in plants: Growth regulation, signaling, and environmental

Potassium is responsible for activation of several vital plant enzymes. Potassium regulate water balance in plants and protect plants from abiotic stress-induced damages. Potassium plays a vital role in mitigating oxidative stress in plants.

2、Potassium Control of Plant Functions: Ecological and Agricultural

In this paper, we present an overview of contemporary findings associating K + with various plant functions, emphasizing plant-mediated responses to environmental abiotic and biotic shifts and stresses by controlling transmembrane potentials and water, nutrient, and metabolite transport.

3、The Critical Role of Potassium in Plant Stress Response

The physiological and molecular mechanisms of K function in plant stress resistance are reviewed. This article also evaluates the potential for improving plant stress resistance by modifying K fertilizer inputs and highlights the future needs for research about the role of K in agriculture.

Potassium in Plants: Possible Functions, Mechanisms and

Potassium (K+) is the essential plant mineral for healthy plant development and functioning. Potassium is essential for protein synthesis, carbohydrate metabolism, and the stimulation of enzymes, it is also a structural component of plants.

(PDF) Role of Potassium in Plant Photosynthesis

Deficiency or inadequate supply of K results in a drop of photosynthetic carbon assimilation which ultimately stunts growth and reduces yield of the plants. K-deficient plants show symptoms...

The Potassium (K) Cycle Contents

For fields where the majority of the plant is removed (corn silage, alfalfa, other forage crops), test soil every two years since these crops remove large amounts of K, and levels can drop quickly.

Continuous potassium fertilization combined with straw return increased

The release of K held in solid-phase into the soil solution for plant uptake is influenced by the quantity at non-specific planar sites and the bonding energy in the solid-phase. The rate of K release could be altered to varying degrees under long-term changes in nutrient management.

Potassium Control of Plant Functions: Ecological and

In this paper, we present an overview of contemporary findings associating K + with various plant functions, emphasizing plant-mediated responses to environmental abiotic and biotic shifts and stresses by controlling transmembrane potentials and water, nutrient, and metabolite transport.

Potassium in plant physiological adaptation to abiotic stresses

Potassium ion (K +) is the most abundant cation required for plant growth and survival. K + -transport and -signaling play crucial roles in plant abiotic stress responses. K + controls multiple physiological processes, such as stomatal regulation and osmoprotection.

The Critical Role of Potassium in Plant Stress Response

Potassium (K) is an essential nutrient that affects most of the biochemical and physiological processes that influence plant growth and metabolism. It also contributes to the survival of plants exposed to various biotic and abiotic stresses.

Potassium fertilizer plays a crucial role in plant growth, significantly impacting development, stress resistance, yield, and quality. So, why do certain plants release potassium after death? This phenomenon involves complex interactions among plant physiology, soil environments, microbial activity, and other factors. Below is a detailed analysis:

I. Plant Physiological Mechanisms

1. Potassium Absorption and Transport Potassium (e.g., K⁺ ions) enters plants through potassium channels in root cell membranes. External stimuli or hormonal regulation trigger these channels to open, allowing K⁺ uptake. Intracellular transport relies on active or facilitated diffusion, delivering K⁺ to organelles like chloroplasts and vacuoles for storage or utilization. This energy-dependent process tightly links potassium absorption to plant growth.

2. Potassium Metabolism Enzymes such as potassium transporters and binding proteins regulate absorption, transport, storage, and distribution, maintaining intracellular balance. Hormones like gibberellin and abscisic acid further modulate these processes.

3. Potassium Signaling Potassium concentration acts as a signaling molecule, influencing growth, stress resistance, and yield. Low potassium stress disrupts photosynthesis, respiration, and protein synthesis, stunting growth. Conversely, excess potassium can lead to toxicity.

4. Potassium and Stress Resistance Potassium enhances drought, salt, cold, and pest resistance by stabilizing cell membranes and promoting root development, improving water use efficiency.

II. Soil Environmental Factors

1. Soil pH Acidic soils promote potassium solubility and uptake, while alkaline soils inhibit it. Adjusting pH optimizes potassium availability.

2. Soil Texture Sandy soils facilitate root expansion but drain quickly, whereas clay soils retain moisture but lack aeration. Crop selection tailored to soil type improves potassium uptake.

3. Soil Organic Matter Organic matter decomposition releases humus, enhancing soil structure, porosity, and water retention. It also provides nutrients (N, P, K), boosting potassium utilization.

III. Microbial Roles

1. Nitrogen Fixation Certain microbes convert atmospheric N₂ into ammonia, indirectly increasing soil nitrogen and supporting potassium cycles.

2. Phosphate Solubilization Phosphate-solubilizing microbes convert insoluble phosphates into absorbable forms, enhancing phosphorus availability and complementary potassium uptake.

3. Potassium Mobilization While weaker than nitrogen/phosphate cycles, some microbes help regulate soil potassium levels, preventing excess accumulation.

IV. Plant Physiological Traits

1. Potassium Requirements Legumes, root crops, etc., demand higher potassium, requiring adjusted fertilization ratios. Cereals like corn/wheat need less.

2. Potassium Utilization Efficiency Factors like soil, climate, and fertilization methods affect efficiency. Optimal N-P-K ratios, controlled-release fertilizers, and split applications enhance usage.

V. Phytopathology

1. Potassium Toxicity Excessive potassium causes stunted growth, yellowing, and dwarfing. Apply potassium in "small, frequent" doses to avoid toxicity.

2. Disease Links Potassium imbalances correlate with diseases (e.g., tomato wilt under deficiency, rice powdery mildew under excess). Proper dosing prevents such issues.

VI. Agricultural Practices

1. Fertilization Principles Tailor potassium use to crop type, soil, and climate. Prioritize high-K crops (legumes, tubers) and reduce for low-K ones (cereals).

2. Application Methods Use base dressing, topdressing, or foliar spraying. Controlled-release fertilizers improve efficiency.

3. Timing Early growth and flowering stages benefit most from potassium. Adjust timing based on crop cycles and soil conditions.

The release of potassium post-plant-death results from ecological interactions spanning physiological, environmental, and microbial dynamics. Understanding these factors informs scientific agricultural practices, optimizing potassium use and crop productivity.