apogamy

/ə'pɔgəmi/

Thân thiện

A fern sporophyte grows from the gametophyte through apogamy.

Definition

1. Noun:
   • (Botany) Development of an embryo without fertilization: A form of asexual reproduction in plants where an embryo develops from a cell or cells of the gametophyte (the haploid, gamete-producing generation) without the fusion of gametes (fertilization). This process is particularly observed in some ferns and related plants, resulting in a sporophyte (the diploid, spore-producing generation) that is genetically identical to the gametophyte parent.

Examples of Usage

• Noun:
  • Apogamy is a notable reproductive strategy in certain fern species.
  • The botanist studied the mechanism of apogamy in the isolated fern population.
  • In apogamy, the sporophyte develops directly from the gametophyte tissue.

Advanced Usage

• Scientific Context: The term is used almost exclusively in botanical and biological literature to describe a specific, non-sexual life cycle event in plants, particularly pteridophytes (ferns and their relatives).
  • The research paper detailed the genetic implications of obligate apogamy in the fern genus.
• Contrast with Related Terms: Often discussed in contrast to apospory (the development of a gametophyte directly from sporophyte tissue without meiosis) and parthenogenesis (development of an embryo from an unfertilized egg cell).
  • While both bypass fertilization, apogamy and parthenogenesis occur in different phases of the plant life cycle.

Variants and Related Words

• Apogamic (adj): Relating to or characterized by apogamy.
  • The apogamic cycle ensures reproduction in the absence of suitable mates.
• Apogamous (adj): Another adjective form meaning pertaining to apogamy.
  • The apogamous fern species showed high genetic uniformity.

Synonyms

• Asexual reproduction (in a specific botanical context): While a broader term, it can encompass apogamy when referring to reproduction without fertilization.
• Agamospermy (in seed plants): A roughly analogous process in flowering plants where seeds are produced without fertilization. Note: Agamospermy is not a direct synonym but a related concept in a different plant group.

Antonyms

• Amphimixis: Sexual reproduction involving the fusion of male and female gametes (fertilization).
• Syngamy: The fusion of gametes in fertilization.

Học thuật

Noun

1. (botany) development of an embryo without fertilization; especially the development in some ferns of a sporophyte from the gametophyte without fertilization