in plants cell division is controlled by which hormone
Answers
Cytokinn
The cytokinin hormones promote cell division and tissue growth, and depend upon the presence of auxins to determine the extent of their activity. When the ratio of cytokinins to auxins is relatively high, stem and leaf growth is stimulated. When, on the other hand, the ratio of cytokinins to auxins is relatively low, root growth is stimulated instead. The balance between these hormones ensures that the plant invests in both root and shoot growth, so that neither becomes too large or small for the other. Cytokinins are also involved in the development of chloroplasts, fruits, and flowers. In addition, they have been show n to delay senescence (aging), especially in leaves, which is one reason that florists use cytokinins on freshly cut flowers.
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