Morphologically, the spice-yielding part of turmeric plant is:

Question

Accepted Answer

The correct option is 3: Rhizome

The spice-yielding part of the turmeric plant (*Curcuma longa*) is morphologically classified as a **Rhizome**. A rhizome is a perennial, underground, modified stem that typically grows horizontally beneath the soil surface. This structure is a vital storage organ for the plant, accumulating starches and other nutrients, which is why the turmeric rhizome is fleshy and stout. Critically, its stem origin is confirmed by the presence of distinct nodes and internodes, as well as small, scale-like leaves and adventitious roots that grow from the nodes. The intense yellow pigment, curcumin, along with the volatile oils that give turmeric its characteristic flavor and medicinal properties, are concentrated within the tissues of this rhizome, which is harvested, boiled, dried, and ground to produce the final spice powder.

The incorrect option is 1: Root

A **Root** is a true subterranean plant organ whose primary functions are anchorage, and the absorption of water and mineral nutrients from the soil. While the turmeric plant does possess true, thin, fibrous roots, these are not the part harvested for the spice; they are merely extensions growing from the rhizome's nodes. Morphologically, a true root lacks nodes, internodes, and scale leaves, which are definitive features of the spice-yielding rhizome. Therefore, confusing the thickened storage stem (rhizome) with the fibrous anchoring structure (root) is a common but crucial error in plant morphology.

The incorrect option is 2: Rhizoid

The term **Rhizoid** is morphologically incorrect for any part of a flowering plant like turmeric. Rhizoids are simple, thread-like structures that function as anchoring mechanisms in lower, non-vascular plants, such as mosses and liverworts (Bryophytes), and in some fungi. Unlike the rhizome, a rhizoid does not possess the complex internal tissue arrangement of a stem, nor is its primary function food storage, and it is fundamentally different from both a root and a modified stem. This term refers to a more primitive biological structure and is completely inapplicable to the reproductive and storage structure of the *Curcuma longa* plant.

The incorrect option is 4: Dried fruits

**Dried fruits** are the ripened ovaries of a plant's flower, and they are formed above the ground. While many common spices, such as coriander, cumin, black pepper, and chili, are indeed derived from the dried fruit of their respective plants, this is not the case for turmeric. Turmeric's spice component, the rhizome, is a modified underground stem. The turmeric plant produces small flowers and subsequent fruits, but these are small, insignificant, and not the source of the commercial spice, which is entirely subterranean.