Roots are killed back, causing plants to be stunted and spindly. Diseased plants rarely produce fruit and when they do, the fruit is stunted and twisted. If this hormone is lacking, stunted or even halted growth may become apparent. Symptoms of deficiency include yellowing of leaves and stunted growth. Symptoms are single or clusters of trees with stunted growth, especially when transplanted. Lack of boron results in short thick cells producing stunted fruiting bodies and roots. Growth of these plants is usually stunted and produces few flowers. It can also lead to malnutrition and stunted growth in children. Many trees are stunted because of the short growing season and severe climate. Teenagers following fad diets are at risk of permanently stunted growth. Wizards are portrayed as emotionally stunted, arrogant and detached. Without these, a turtle's growth can be stunted and its immune system weakened. There is a risk that growth of infants and children might be stunted. Furthermore, growth of the alimentary canals of some males becomes stunted, preventing them from feeding. Vegetation is stunted due high winds and salt.