Question

11. Lateral stem development is controlled by the relative levels of
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Answer 1

Answer:

Furthermore, in rice wild-type plants, lateral buds of the first formed leaf axil usually remain dormant. ... An appealing model is that auxin in the main stem regulates CK levels at the node, and possibly also in the roots, which determines the amount of CK transported into the bud.

Answer 2

Answer:

The relative amounts of auxins and cytokinins control the formation of lateral stem cells.

Explanation:

Auxin promotes apical bud dominance, while cytokinin inhibits it. The ratio of both of these hormones has an impact on lateral stem growth.

• The lateral buds remain inactive as long as the apical meristem produces enough auxin. The auxin is no longer produced if the apex of the shoot is removed (by a browsing animal or a scientist).
• The lateral buds will break their hibernation and begin to expand as a result of this. As a result, the plant grows bushier.
• Shoot bifurcation is controlled by interactions between strigolactone (SL), auxin, and cytokinin (CK). For a long time, CK was thought to be the only phytohormone that promoted lateral bud development.
• Gibberellin also works as a positive regulator in the control of shoot branching, according to this study.

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