Potassium-magnesium imbalance causes detrimental effects on growth, starch allocation and Rubisco activity in sugarcane plants

While there is abundant literature on the antagonistic interaction between potassium (K) and magnesium (Mg) during root uptake transport, is, however, little published data these nutrients within tissue, especially for sugarcane plants having high demand K Mg. This study aimed to investigate effects of interactions Plants were grown in nutrient solution with increasing application doses at low adequate Mg treatments under controlled greenhouse conditions. Leaves, stalks roots have been analyzed growth, concentrations, starch partitioning, activity Rubisco. There significant decreases concentration all plant parts by supply, roots. Leaf symptoms deficiency appeared not only Mg, but also when treated very K. Magnesium contained much higher amount roots, young leaves than applications levels. By contrast, was a accumulation older deficient plants. associated Rubisco leaves. Our results show clearly that interfere significantly positive sink organs such as stalks. It obvious imbalance nutrition adverse consequences sugar yield capacity.