Definition of Pollen sac. Meaning of Pollen sac. Synonyms of Pollen sac

Here you will find one or more explanations in English for the word Pollen sac. Also in the bottom left of the page several parts of wikipedia pages related to the word Pollen sac and, of course, Pollen sac synonyms and on the right images related to the word Pollen sac.

Definition of Pollen sac

Pollen sac
Pollen Pol"len, n. [L. pollen fine flour, fine dust; cf. Gr. ?] 1. Fine bran or flour. [Obs.] --Bailey. 2. (Bot.) The fecundating dustlike cells of the anthers of flowers. See Flower, and Illust. of Filament. Pollen grain (Bot.), a particle or call of pollen. Pollen mass, a pollinium. --Gray. Pollen sac, a compartment of an anther containing pollen, -- usually there are four in each anther. Pollen tube, a slender tube which issues from the pollen grain on its contact with the stigma, which it penetrates, thus conveying, it is supposed, the fecundating matter of the grain to the ovule.

Meaning of Pollen sac from wikipedia

- surrounded by layers of sterile cells that grow into the wall of the pollen sac. Some of the cells grow into nutritive cells that supply nutrition for...
- Pollen sac may refer to: Structures in plants that hold pollen Bee pollen, sacs or balls of pollen packed by bees This disambiguation page lists articles...
- two-lobed. Each anther lobe develops two pollen sacs, so each anther has four pollen sacs. Development of pollen sacs begins with the differentiation of archesporial...
- microsporangia (pollen sacs). The female cone (megastrobilus, seed cone, or ovulate cone) contains ovules which, when fertilized by pollen, become seeds...
- also known as pollen sacs. The microsporangia produce the microspores, which for seed plants are known as pollen grains. If the pollen sacs are not adjacent...
- angiosperm flowers. Pollen is often enclosed in paired synangia (pollen sacs). The synangia lie on the adaxial (inner) edge of pollen-bearing leaf-like...
- revealing one pollen sac. The two genera, Exbucklandia and Hamamelis is known to have this anther type. Plants of the Hamamelidaceae have sticky pollen, which...
- microsporangia. The microsporangia form sacs or pockets (locules) in the anther (anther sacs or pollen sacs). The two separate locules on each side of...
- important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat. The cells are usually bigger and normally...
- gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm). It begins when a pollen grain adheres to the stigma of the carpel, the...