Gemma

A gemma (plural: gemmae) is a simple, multicellular structure or bud that detaches from a parent organism and develops into a new individual, especially in plants and certain invertebrates. Primarily a form of asexual reproduction, gemmae often appear as small, specialized propagules formed in structures like gemma cups (in liverworts) or on the thallus itself. This method allows for rapid colonization and propagation in favorable environments, enabling efficient spread and survival. The process involves a separation and growth mechanism, crucial for vegetative reproduction.

Gemma meaning with examples

• In the mossy garden, the liverworts displayed their intricate gemma cups. Tiny, disc-shaped gemmae were released with rainfall, each capable of sprouting into a new liverwort colony. This method of vegetative reproduction enabled the rapid spread of the liverwort across the damp stones, demonstrating the efficient power of asexual propagation and colonization through these specialized buds.
• The botanist carefully examined the surface of the Marchantia. He identified the numerous gemma cups, each holding several gemmae. These reproductive structures are designed to disperse gemmae over short distances when splashed by raindrops, making the asexual reproduction system very efficient and successful for the environment.
• A researcher studying a specific type of alga noticed the formation of gemma-like structures on the filaments. After careful analysis, it was determined that these propagules detached under favorable environmental conditions, quickly developing into new algal colonies. The process was very helpful to expand in that particular pond habitat.
• The horticulturalist propagated a rare orchid through the division of rhizomes and, also, by collecting the small gemma-like buds found on its leaves. This practice, which mirrored the plant's natural asexual reproduction process, ensured the preservation and multiplication of this specific orchid. This was done to maintain their lineage.