Dictionary > Microspore

Microspore

Definition
noun, plural: microspores
(botany) The smaller spore produced by sporophytes and develop into male gametophyte
(botany) A developing pollen grain at the uninucleate stage in seed plants
Supplement
In botany, a microspore refers to the spore produced by sporophytes. It is haploid and gives rise to a male gametophyte. Metagenesis or the alternation of generations involves the alternation of life phases in the life cycle of plants. The sporophyte, in particular, produces spores (thus the name) to give rise to the next phase, which is the gametophyte. Gametophytes, on the other hand, produce gametes that give rise to sporophytes. A mature sporophyte produces spores by means of meiosis. The diploid sporophyte thus bears spores that are haploid, i.e. the number of chromosomes is half of the number of those of a sporophyte. The spore produced by sporophytes may be a microspore or a megaspore. The microspore is generally smaller in size compared with the megaspore. And the microspore develops particularly into a haploid male gametophyte. The megaspore, in comparison, develops into a haploid female gametophyte.
Word origin: Greek mikros (small) + Greek sporá (sowing, seed)
See also:

Related term(s):

  • microsporic (adjective)


    You will also like...

    Genetics – Lesson Outline & Worksheets
    Genetics – Lesson Outline & Worksheets

      Topics Modules Quizzes/Worksheets Description Introduction to Genetics Genetics – Definition: Heredity and ..

    Gene Pool and Speciation
    The Gene Pool and Population Genetics

    According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

    Kidneys
    Kidneys and Regulation of Water and Inorganic Ions

    The kidneys are responsible for the regulation of water and inorganic ions. Read this tutorial to learn about the differ..

    Neurology of Illusions
    Neurology of Illusions

    Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

    Balanced Diet
    A Balanced Diet – Minerals and Proteins

    Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

    "Opabinia regalis"
    The Evolutionary Development of Multicellular Organisms

    Multicellular organisms evolved. The first ones were likely in the form of sponges. Multicellularity led to the evolutio..