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).
Afterwards pollen and pollenkitt was reattached to this reduced pollen sac.
Y-shaped pollen sacs, located at the bottom of the flower hoods, can trap smaller insects.
6 cm long, base distinctly sagittate, apex obtuse, dorsifixed at 2/5 of its length above the base, versatile and hanging upside down at anthesis, with the margins of the opposed pollen sacs only partially touching each other at anthesis and not completely clasping the connective area; pollen ellipsoidal, sulcate, exine broadly reticulate, lumina rounded, muri narrowed; stigma conduplicate-spiral, ellipsoidal-capitate, blades 0.
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.