Interaktion von Eisen und Stickstoff bei Rebenunterlagen

Iron (Fe) is a vital micronutrient for plants, playing a key role in processes like chlorophyll production, photosynthesis, respiration, and nitrogen fixation. When plants lack iron, they suffer from yellowing leaves, reduced growth, and significant losses in yield and quality. For grapevines—a cornerstone of global agriculture and winemaking—iron availability is especially critical. As perennial grafted plants, grapevines depend heavily on their rootstocks to withstand environmental stresses and maintain nutrient balance. The IronMan project is exploring the intricate relationship and interaction between iron and nitrogen uptake in grapevine rootstocks. Nitrogen, whether in the form of nitrate or ammonium, not only affects iron availability but also influences how plants absorb, store, and transport this essential nutrient. While it’s long been known that different grapevine rootstocks exhibit varying levels of stress tolerance, the underlying mechanisms remain a mystery. Through hydroponic experiments, the IronMan project will investigate how grapevine rootstocks adapt to changing nutrient conditions and stress. By simulating real-world challenges, researchers aim to uncover the strategies rootstocks use to maintain nutrient balance and thrive under pressure. The findings will pave the way for practical solutions to improve the nutritional health of grapevines by adapting currently available recommendations for fertilizer usage.