Examples of iodine as micronutrient in plants, for improvement of the main commercial greenhouse crops cultivation
Plants bind iodine (I) in at least 82 proteins in leaves and in roots. Plants need I for timely flowering, increased seed production, biomass accumulation, and photosynthesis. Moreover, adequate I in the plant can alleviate loss of production from abiotic and biotic stress. From the involvement of I in calcium signaling, its presence in root-peroxidases and diverse protein sub-units of PS I, PS II and enzymes involved in carboxylation, it can be predicted that I has the potential to increase production in horticultural crops. The effect of I, provided with water soluble potassium nitrate towards prevention of I deficiency in plants, was investigated in practical trials in commercial greenhouse production locations. Four cases are presented: tomato in Turkey, cherry tomato on the vine in Spain, Italian sweet pepper (Capsicum) in Morocco, and lettuce and coriander in Brazil. The results of the application of I as a micronutrient with the nutrient solution in the tested crops show an improvement in root development and fresh weight of lettuce and coriander in hydroponics, total season yield in round tomato and in Italian sweet pepper. Additionally, an increase in fruit fresh weight and in the concentrations of antioxidants and calcium in cherry tomato was revealed, and a prevention of blossom end rot in sweet pepper fruits was noticed. The scientific results and the experiences of commercial growers indicate that I is just as needed for plants as it is for other living organism on earth.
Hora, K. and Holwerda, H.T. (2021). Examples of iodine as micronutrient in plants, for improvement of the main commercial greenhouse crops cultivation. Acta Hortic. 1321, 205-212
fertigation, nutrient solution, tomato, sweet pepper, lettuce, potassium nitrate, fruit quality