Abstract:
Buds and leaves of Carob (Ceratonia siliqua L.) contained four growth promoting substances (P1 – P4) and one inhibitor) at various stages of development. Buds from trees with fruit contained higher concentration of P2 (gibberellin-like substance) compared to that of P3 (auxin-like). The concentration decreased as the leaves expanded and mature leaves had an insignificant amount of the promotors. Buds from trees with fruit contained insignificant amount of growth promoting substances. Their concentration increased after about a month when buds started to sprout and then exhibited a sudden decrease in mature leaves. This decrease was consistent with their counterparts from the non-fruit-bearing trees. Concentration of the inhibitor was higher in buds and leaves from trees with fruit compared to those without. Leaves from both types of trees exhibited a gradual increase in the inhibitor content with leaf expansion. Mature and fully expanded leaves contained a significant amount of the inhibitor. The delay in active growth and high inhibitor content in these vegetative organs from fruit-bearing and non fruit-bearing trees is explained.
Page(s):
189-194
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Botany, Volume: 12, Issue: 2, Year: 1980