What Is Meaning Of Aecium? Find Out Meaning Of Aecium.

Berry Mathew

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Aecium Meaning & Definition

What Is Meaning Of Aecium?

What Is Meaning Of Aecium?

The meaning of the term aecium is that it is a specialized reproductive structure found in some rusts and smuts which produces aeciospores. Generally, the plural form of aecium is aecidium, in which the spores are always formed in chains and are enclosed in a cup-shaped peridium.

In some of the literature, aecium is also referred to as cluster cups. All the species in the genus Phragmidium have a caeoma which is a disperse aecium with the unavailability of a peridium. In other words, you can also explain the meaning of aecium as a globular or cup-shaped structure in some rust fungi in which aeciospores are produced.

The word aecium is derived from New Latin, from Ancient Greek “aikia”, which means injury, insult. But, as per Merriam-Webster’s information, it says that aecium is a back-formation from aecidium and is not related to the Greek “aikia”. However, latterly, the term aecium was introduced as a substitute for aecidium by the Purdue University plant pathologist J.C.Arthur, in an effort to reform terminology for rust fungi.

In other words, you can also define the meaning of the word aecium as the fruiting body of a rust fungus in which the first binucleate spores are usually produced. The term aecium is also sometimes spelled as aecia.


  1. Generally, spermogonia and aecium are unknown.
  2. The concluding hyphae subsequently produce aecium.
  3. There have been no pycnia or aecium discovered on Canna Rust.
  4. The wounds turn orange in color and are now known as aecium.
  5. The suitable stage on the pear trees is also called as aecium.
  6. On the underside, it manufactures raised orange aecium usually covered in spores.
  7. The rust has different reproductive structures such as aecium and spermogonia present.
  8. The aecium is usually cup-shaped and consists of a conspicuous peridium.
  9. These are actually aeciums containing aeciospores for dispersal, making the broom a sign of illness.
  10. Signs of pine-pine gall rust involves the pale yellow aecium, produced on galls in spring as well as the yellow-orange aeciospores contained within it.
  11. The sporidia sprouted and result in the formation of aecium with yellow spores.
  12. This dikaryotic mycelium then produces structures known as aecium, which form a type of dikaryotic spores known as aeciospores.
  13. On Picea, spermogonia, and aecium happen on different rusty yellow bands on current year pointers.
  14. Orange-brown pustules with a pale halo on leaves and stems restore the aecium.


Is Aecia A Word?

An aecium (plural aecia) is a specialised reproductive structure found in some plant pathogenic rust fungi that produce aeciospores. Aecia may also be referred to as “cluster cups”. The term aecidium (plural aecidia) is used interchangeably but is not preferred.

How Is Aecium Formed?

aecium, also called aecidium, a cluster-cup or fruiting body of certain rust fungi (phylum Basidiomycota, kingdom Fungi). Yellow to orange in colour, aecia develop after fertilization and bear one-celled spores (aeciospores, or aecidiospores). Aecia are usually found on lower leaf surfaces of plants.


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