pollen sac


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pollen sac

[′päl·ən ‚sak]
(botany)
In the anther of angiosperms and gymnosperms, a cavity that contains microspores.
References in periodicals archive ?
Then the wall surrounding the each microspore cells dissolve and the microspores in the pollen sac are released.
Each young anther was consisted of 4 pollen sacs (tetrasporangiate) with connective tissue in the center (Fig 1C).
Sperm cells develop inside pollen sacs. These are inside the anthers on the male floral organ, the stamen (Fig.
Afterwards pollen and pollenkitt was reattached to this reduced pollen sac. Under extremely wet circumstances (98% relative humidity), most of the pollen did fall out of the anther whereas intact anthers did not lose their pollen.
crossmanensis nearest to the crown group (which is united by papillose pollen sacs).
(2008) and Doyle and Endress (2014) strongly linked the Pennipollis plant with the Chlomnthaceae-Ceratophyllum clade using the D&E backbone tree and with Chloranthaceae alone using the J/M tree, but they placed it below the crown group because it retains protruding rather than embedded pollen sacs (Fig.
While most Alcantarea species presents anthers dorsifixed near the base, rigidly fixed and following the same orientation of the filaments, with the margins of the opposed pollen sacs touching to slightly overlapping each other at anthesis and completely clasping the connective area (Leme, 2007), the anthers of A.
After the bristles were excised, emasculation was done when the first anther had just emerged and before the pollen sacs had burst.
Tiny stems called anthers surround the reservoirs of these flowers with little pollen sacs at their tips.
In the two neighboring pollen sacs, microspores development is synchronized.
Microspores and pollen grains are produced from pollen mother cells (Microsporocytes), PMCs within loculus anthers (microsporangia or pollen sacs) of the flower.