microsporangium

American  

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

noun

Botany.

microsporangia plural

1. a sporangium containing microspores.

---

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

---

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.

---

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

Each lobe, called a microsporangium, is filled with pollen.

From Textbooks ● Jan. 1, 2015

Illustration A shows cross section of an anther, which has four lobes each containing a pollen sac, or microsporangium.

From Textbooks ● Jan. 1, 2015

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

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

To deal first with the microsporangium or pollen-sac.

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

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

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

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 Campbell, Douglas Houghton