Leukodystrophy (from the Greek words leukos:white and dystrophia: faulty development, degeneration) has come to mean a genetic metabolic disorder of the white matter. In leukodystrophies, myelin may be absent or decreased, of an abnormal structure, and unstable. Normal myelination may not be attained and what myelin is formed may break down. Some leukodystrophies affect myelin and myelin producing cells directly.
If your purpose for pruning is to enhance flowering: 1  For trees that bloom in spring, prune when their flowers fade. 2  Trees and shrubs that flower in mid-to late summer should be pruned in winter or early spring.his depends to a large extent on why you prune. Light pruning and the removal of dead wood can be done anytime.
Prune in late winter or early spring while the plants are dormant. Remove their dead and damaged wood. This is a good time to do some shaping that is needed. Take out interior stems to improve air circulation.