What rooting hormone is commonly used in cuttings?

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Multiple Choice

What rooting hormone is commonly used in cuttings?

Explanation:
Rooting cuttings relies on a hormone signal that triggers root formation at the cut end, and the key signal for this process is auxin. Synthetic auxins—indole-3-butyric acid (IBA) and naphthaleneacetic acid (NAA)—are commonly used because they reliably stimulate adventitious root development and are stable in commercial rooting products. Other substances listed work differently: gibberellins like GA3 mainly promote stem growth and don’t promote rooting; ethylene can influence rooting in some conditions but isn’t the standard rooting hormone; abscisic acid (ABA) tends to inhibit growth and is not used to promote rooting. So, the most common rooting hormones for cuttings are IBA or NAA.

Rooting cuttings relies on a hormone signal that triggers root formation at the cut end, and the key signal for this process is auxin. Synthetic auxins—indole-3-butyric acid (IBA) and naphthaleneacetic acid (NAA)—are commonly used because they reliably stimulate adventitious root development and are stable in commercial rooting products. Other substances listed work differently: gibberellins like GA3 mainly promote stem growth and don’t promote rooting; ethylene can influence rooting in some conditions but isn’t the standard rooting hormone; abscisic acid (ABA) tends to inhibit growth and is not used to promote rooting. So, the most common rooting hormones for cuttings are IBA or NAA.

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