orthotropous

/ɔ:'θɔtrəpəs/

Thân thiện

An orthotropous ovule is shown in a botanical diagram.

Definition

1. Adjective:
   • (Botany) Having a straight ovule orientation: Describes a plant ovule that is completely straight and upright in the ovary, with the micropyle (the opening for pollen tube entry) positioned at the apex (top) directly opposite the stalk (funicle).

Usage

• This is a highly specialized botanical term used to describe the orientation and morphology of an ovule within a plant's ovary. It is primarily used in academic, scientific, and horticultural contexts.
• Example: "In contrast to anatropous ovules, ovules are not inverted."

Advanced Usage

• Comparative Anatomy: The term is often used in comparative descriptions of ovule types (e.g., orthotropous vs. anatropous vs. campylotropous).
  • Example: "The orthotropous condition is considered the most primitive form among flowering plants."

Variants and Related Words

• Orthotropy (n): The state or condition of being orthotropous.
  • Example: "Orthotropy is a characteristic found in some families like the Piperaceae."
• Anatropous (adj): The more common ovule type, which is inverted and bent.
• Campylotropous (adj): Describes an ovule that is curved.

Synonyms

• Atropous (adj): A less common synonym for orthotropous.
• Straight (adj, in a specific botanical context): While not a technical synonym, it describes the key morphological feature.

Học thuật

Adjective

1. (of a plant ovule) completely straight with the micropyle at the apex