the structure in certain spore-bearing plants in which the microspores are formed: corresponds to the pollen sac in seed plants
Compare megasporangium
Examples of 'microsporangia' in a sentence
microsporangia
Two microsporangia with a three-layer wall form in the anther.
Irena Giełwanowska, Anna Bochenek, Ewa Szczuka 2012, 'Development of the pollen in the antarctic flowering plant Colobanthus quitensis (Kunth)Bartl.', Acta Agrobotanicahttps://pbsociety.org.pl/journals/index.php/aa/article/view/1758. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Changes and varieties in coloration of microsporangia, as well as anthesis were studied.
Elena Antonova 2014, 'Microstrobiles morphology in Juniperus subgen. Sabina', Modern Phytomorphologyhttp://phytomorphology.org/PDF/MP6/06127128.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Microsporangia have a longitudinal dehiscence line and show a tapered apex.
De-Ming Wang, Mei-Cen Meng, Yun Guo 2016, 'Pollen Organ Telangiopsis sp. of Late Devonian Seed Plant and Associated VegetativeFrond', PLOS ONE10.1371/journal.pone.0147984. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Microsporangia are usually absent or very few.
J. Kornaś, A. Jankun 1983, 'Annual habit and apomixis as drought adaptations in Selaginella tenerrima',Bothalia: African Biodiversity & Conservationhttps://abcjournal.org/index.php/abc/article/view/1223. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The microsporangia of the evaluated grasses produce a small number of three−celled pollen grains.
Giełwanowska Irena, Kellmann−Sopyła Wioleta 2015, 'Generative reproduction of Antarctic grasses, the native species Deschampsia antarcticaDesv. and the alien species Poa annua L.', Polish Polar Researchhttp://www.degruyter.com/view/j/popore.2015.36.issue-3/popore-2015-0016/popore-2015-0016.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
It was ascertained that number of microsporangia correlates with the position of sporophylles in strobile.
Elena Antonova 2014, 'Microstrobiles morphology in Juniperus subgen. Sabina', Modern Phytomorphologyhttp://phytomorphology.org/PDF/MP6/06127128.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
The majority of mature pollen grains remained inside microsporangia and germinated in the thecae.
Kellmann-Sopyła Wioleta, Koc Justyna, Górecki Ryszard J., Domaciuk Marcin, GiełwanowskaIrena 2017, 'Development of generative structures of polar Caryophyllaceae plants: the Arctic Cerastiumalpinum and Silene involucrata, and the Antarctic Colobanthus quitensis', Polish Polar Researchhttp://www.degruyter.com/view/j/popore.2017.38.issue-1/popore-2017-0001/popore-2017-0001.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
While some megasporangia are found, microsporangia are not yet established.
S. Schultka 1998, 'Ein fruktifizierender Sproß von Asolanus camptotaenia Wood aus dem WestfalD Nordwestdeutschlands', Fossil Recordhttp://www.foss-rec.net/1/139/1998/fr-1-139-1998.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Synangia are radial in symmetry and each consists of 4–8 elongate microsporangia fused at base.
De-Ming Wang, Mei-Cen Meng, Yun Guo 2016, 'Pollen Organ Telangiopsis sp. of Late Devonian Seed Plant and Associated VegetativeFrond', PLOS ONE10.1371/journal.pone.0147984. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Further, the smaller sporangia (microsporangia) are without a longitudinal suture and produce variable number of spores.
A. Subrahmanyam, A.S. Sri, V.S. Raju 2010, 'Abradeosporangium, a new genus of Mucorales (Fungi: Zygomycetes) from India',Journal of Threatened Taxahttp://threatenedtaxa.org/index.php/JoTT/article/view/547. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)