FFA Floriculture Practice Test

What is the primary use of indolebutyric acid (IBA) in floriculture?

1. To promote flowering in plants

2. To enhance leaf growth

3. To promote rooting of cuttings

4. To improve fruit yield

The correct answer is: To promote rooting of cuttings

Indolebutyric acid (IBA) is primarily used in floriculture to promote rooting of cuttings. It is a synthetic plant hormone belonging to the auxin class, which plays a crucial role in root development. When applied to plant cuttings, IBA stimulates the formation of root primordia and enhances the rooting process, thus increasing the chances of successful propagation. This is particularly important in floriculture, where the propagation of plants through cuttings is a common practice for cultivating various ornamental species and ensuring plant quality. The effectiveness of IBA in encouraging root growth makes it a vital tool for floriculturists seeking to expand their plant stock efficiently. The other options, while related to plant growth, do not accurately reflect the primary function of IBA. It is not primarily used to promote flowering, enhance leaf growth, or improve fruit yield, as those processes involve different types of hormones and growth regulators tailored to various growth stages and plant needs.