Effect of Growth Substances on the Absciss Layer in Leaves of Coleus

摘要: 1. Following the reports of others that growth substances and materials containing them delay abscission debladed petioles, a study their effects in relation to several other factors affect was made. 2. Growth coleus leaf is basipetal. 3. The blade 85-90 per cent expanded before absciss layer initiated third pair leaves mature sixth plants bearing eight pairs. 4. Abscission usually occurs layer, but under certain treatments it may occur without development this layer. 5. Older abscise younger leaves, accelerate cause older first. 6. Removal accelerates all except first leaves. A well-defined develops these after months. 7. Partially petioles do not as soon from which entire has been removed. Actively expanding portions t...