Dictionary > Pseudogamy

Pseudogamy

Definition
noun
(1) A form of parthenogenesis wherein the sperm stimulates the egg cell to develop into an embryo without fertilizing it; gynogenesis
(2) A type of reproduction where the embryo develops from the fusion of vegetative cells rather than of gametes; centrogamy
Supplement
Pseudogamy is a form of asexual reproduction since there is no union of gametes involved. It may be in the form of parthenogenesis wherein the sperm stimulates the egg cell to form an embryo without the need to fertilize it. In this way there are no genes from the male that are inherited. This is also referred to as gynogenesis.1 In this form of reproduction, mating is still required so that the sperm would stimulate the egg cell although no genetic material will be contributed during the development of an offspring. This is seen in certain salamanders of the genus Ambystoma.
In a restrictive sense, pseudogamy may also pertain to a reproductive process where in plants the embryo develops from the fusion of vegetative cells rather than of gametes. This is exemplified by the so-called pseudogamous apomixis as seen in Rosaceae and Poaceae, e.g. the Himalayan blackberry Rubus armeniacus and gamagrass Tripsacum dactyloides. In this mode of reproduction, pollination is required but there is no male inheritance.
Synonym(s):

  • pseudomixis
  • gynogenesis

See also:

  • parthenogenesis
  • asexual reproduction
  • Reference(s):

    1 Engelstädter, J. (2008). Constraints on the evolution of asexual reproduction. BioEssays. Review Article. 30(11–12): 1138–1150.


    You will also like...

    Population Growth and Survivorship
    Population Growth and Survivorship

    This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

    Protein (illustration)
    Protein Variety

    The sequence of amino acids determines the type of protein. Protein is synthesized according to the sequence of nucleoti..

    New Zealand Flora & Fauna
    Ecology & Biodiversity: New Zealand Flora & Fauna

    New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

    Ecological Research Measuring & Analysis
    Ecological Research: Measuring & Analysis

    This lesson is about the methods used for ecological research, such as quadrat and transect sampling, canopy fogging, an..

    Chromosomes X and Y and Sex Determination
    Chromosomes X and Y and Sex Determination

    This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

    Adaptive Radiation
    Adaptive Radiation

    The diversification of several new species from a recent ancestral source, each adapted to utilize or occupy a vacant ad..