Abstract
The hormonal signals that induce vascular differentiation are the controlling signals that synchronize plant development, organ growth regulation, and feedback cross talks between the shoot and the root. These signals regulate organ development by promoting or inhibiting plant organ growth and therefore should be clarified in order to understand the regulation of vascular differentiation. There is a continuous positive hormonal feedback communication between the shoot apices and the root tips that synchronizes plant development; each plant pole sends its growth-promoting hormonal signal to the opposite side of the plant, informing the other plant pole about its activity and quantity. The major shoot signal produced in the apical bud and young leaves is auxin, while the basic root tip signals produced in the root cap are cytokinins. Auxin promotes the initiation and development of the roots, while cytokinins from the root tips promote the development and growth of the shoot organs. Conversely, as will be clarified in this chapter, due to organ competition, identical organs may cause inhibition, when one of them becomes dominant and retards the others, a phenomenon that was termed apical dominance.
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Aloni, R. (2021). Apical Dominance and Vascularization. In: Vascular Differentiation and Plant Hormones. Springer, Cham. https://doi.org/10.1007/978-3-030-53202-4_6
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DOI: https://doi.org/10.1007/978-3-030-53202-4_6
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