microsporangium

American  

[mahy-kroh-spaw-ran-jee-uhm, -spoh-] / ˌmaɪ kroʊ spɔˈræn dʒi əm, -spoʊ- /

noun

Botany.

• microsporangia
  plural

1. a sporangium containing microspores.

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microsporangium British  

/ ˌmaɪkrəʊspɔːˈrændʒɪəm /

noun

1. the structure in certain spore-bearing plants in which the microspores are formed: corresponds to the pollen sac in seed plants Compare megasporangium

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microsporangium Scientific  

/ mī′krō-spə-răn′jē-əm /

• microsporangia
  plural

1. A plant structure in which microspores are formed. The pollen-producing male cones of a pine consist of many microsporangia, where the microspores of the pine develop into pollen grains to be dispersed.

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Other Word Forms

Noun Inflected Forms

• microsporangia
  plural

Etymology

Origin of microsporangium

First recorded in 1880–85; micro- + sporangium

Example Sentences

See Examples For:

microsporangium microsporangia

The microsporophyte has a cluster of cells called a microsporangium, and the megasporophyte has a cluster of cells called a megasporangium.

From Textbooks ● Jan. 1, 2015

Within the microsporangium, cells known as microsporocytes divide by meiosis to produce four haploid microspores.

From Textbooks ● Jan. 1, 2015

As the microsporangium matures, two pollen sacs merge and an opening forms between them so that the pollen can be released.

From Textbooks ● Jan. 1, 2015

The microsporangium contains microspore mother cells, which divide by meiosis to produce haploid microspores.

From Textbooks ● Jan. 1, 2015

To deal first with the microsporangium or pollen-sac.

From Scientific American Supplement, No. 531, March 6, 1886 by Various

The microsporangia, which are usually bi-lobed, are pollen sacs in which the microspores develop into pollen grains.

From Textbooks ● Jan. 1, 2015

Inside the anthers’ microsporangia, male gametophytes divide by meiosis to generate haploid microspores, which, in turn, undergo mitosis and give rise to pollen grains.

From Textbooks ● Jan. 1, 2015

Upon maturity, the microsporangia burst, releasing the pollen grains from the anther.

From Textbooks ● Jan. 1, 2015

Microspores, or mother cells form inside the microsporangia.

From Textbooks ● Jan. 1, 2015

C, longitudinal section of a spike, with a single macrosporangium at the base; the others, microsporangia, × 3.

From Elements of Structural and Systematic Botany For High Schools and Elementary College Courses by Douglas Houghton Campbell