How does white rot appear as it ages?

As white rot ages, it characteristically develops a spongy texture and may emit a noticeable odor. This transformation occurs as the fungal decay progresses, breaking down wood fibers and cell structures, which affects the overall integrity and density of the material. The quality of the tissue changes, leading to a softer, more decomposed feel as the fungus continues to consume the organic material.

In the context of wood rot, recognizing the presence of an odor is also significant. The breakdown of organic materials by fungi often produces compounds that smell, an indicator of underlying decay. The combination of the spongy texture and odor becomes crucial for identification and understanding the extent of the rot.

The other options describe characteristics that do not represent the typical behavior of white rot as it ages. For example, a significant darkening or shiny surface does not align with the expected symptoms of white rot deterioration. Additionally, while stringy appearances can develop due to certain forms of decay, white rot primarily maintains a softer, spongier quality rather than retaining structural forms.