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  Worming the way to a better soil P availability 🪱🌾 📚 Earthworms play a crucial role in phosphorus (P) mobilization within the soil ecosystem. 📊 The available P content is higher in earthworm casts (compared to the surrounding soil) ca. 84% higher. 🪱 Earthworms can affect phosphorus cycling and improve availability to the plant (ortho-P form in soil solution) through the following effects of their activity: 🔄 PHYSICAL FRAGMENTATION AND MIXING By bringing deeper soil layers to the surface and incorporating organic matter, earthworms enhance the contact between phosphorus-containing compounds and plant roots 🧪 CAST PRODUCTION AND pH MODIFICATION Earthworms excrete casts, which are nutrient-rich, pellet-shaped waste materials. Their activity can influence soil pH by releasing alkaline substances during digestion. 🦠 STIMULATION OF MICROBIAL ACTIVITY Earthworms affect the soil microbiome activity, which results in an increased release of phosphatases and subsequent mineralizati...

  Zoom in on arbuscular mycorrhizae formation 🦠🌱 🔎 The successful establishment of arbuscular mycorrhizae (AM) symbiosis consists of the following stages: 1️⃣ PRECONTACT STAGE (signaling dialog between host plants) -> The roots of the host plant exude strigolactones (SLs) and flavonoids into the rhizosphere. -> SLs induce spore germination and hyphal branching of AM fungi. -> AM fungi release mycorrhizal factors to initiate the symbiosis response in root cells, including calcium spiking and symbiosis-related gene expression. 2️⃣ INFECTION STAGE -> AM fungi form a hyphopodium on the root surface. -> The formation of the hyphopodium is supported by host-derived cutin monomers. -> Hyphae of AM fungi then invade root cells through a prepenetration apparatus that guides the fungal hypha toward the cortex. 3️⃣ FORMATION OF WELL-DEVELOPED ARBUSCULES -> The fungal hyphae undergo dichotomous branching and form tree-like structures called arbuscules. -> Well-develo...

When it comes to soil health and fertility, one crucial factor that plays a significant role is the carbon-to-nitrogen ratio, commonly referred to as the C:N ratio. This ratio is a fundamental aspect of soil management and has a direct impact on the overall productivity and sustainability of agricultural practices. In this article, we will explore the significance of the C:N ratio in soil, its effects on plant growth and nutrient cycling, and how understanding and optimizing this ratio can contribute to a better future for agriculture. Understanding the C:N Ratio The carbon-to-nitrogen ratio represents the proportion of carbon (C) to nitrogen (N) present in organic matter, such as plant residues, compost, or manure. It is a vital indicator of the decomposition and nutrient availability processes in soil. The ratio is expressed numerically, with higher values indicating a higher concentration of carbon relative to nitrogen. Nutrient Cycling and Decomposition The C:N ratio affects the de...

  SILICON 🛡️🌱 Turn the fungal defense ON 💡 Silicon (Si) possesses antifungal properties and minimizes foliar disease development by the formation of physical barriers and specific tolerance mechanisms 🛡️ PHYSICAL PROTECTION Silicon acts as a natural shield, fortifying plant cell walls and creating a physical barrier against fungal invaders. This extra layer of defense makes it harder for pathogens (e.g. germinating fungal spores) to penetrate and cause cellular damage. 🧬 MOLECULAR DEFENSE Silicon also triggers specific molecular adaptations within plants, activating their natural defense mechanisms. It was shown that Si treatment activates the expression of specific genes (e.g. PAL, PRO, CHS, POX, PR-1, CHI, β-1,2-glucanase) involved in the tolerance against biotic stresses. Silicon stimulates the production of defense-related enzymes and compounds, including antioxidants, secondary metabolites, and antifungal compounds. The signaling pathways were shown to be hormone-depende...