Britannica Sources used in this answer

How does an ovary become a fruit in flowering plants?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

Cluster of bright red seeds emerging from the cone-shaped fruit of a magnolia grandiflora, surrounded by large, glossy green leaves. — Seed Fruit and seeds of the southern magnolia (*Magnolia grandiflora*). The fruit is an aggregate of follicles, and each follicle bears a single red seed.

In flowering plants, the transformation of an ovary into a fruit is a process triggered primarily by fertilization, though it can occasionally occur without it through a process known as parthenocarpy.12

Following fertilization, the flower undergoes significant physiological changes:
* Floral Senescence: The anthers and stigma wither, and the petals typically drop off. Sepals may be shed or undergo various modifications.12
* Ovary Enlargement: The ovary begins to enlarge, eventually maturing into the fruit. This growth is often supported by plant hormones, such as auxins, which play a key role in fruit development.134
* Seed Development: Simultaneously, the ovules within the ovary develop into seeds, each containing an embryo plant.12

Botanically, the resulting fruit is defined as the mature ovary and its associated parts. Its primary biological purpose is to provide protection for the developing seeds and to facilitate their dissemination.12