generative cell

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Subdivision Cycadicae
Subdivision Cycadicae Development of Pollen Grain A stalk cell and body cell develop from the generative cell. As the body cell elongates, the pollen tube begins to develop. Two multiflagellated sperm develop from the body cell. Part of a developing ovule at the time of fertilization. Return to Main Menu Division Pinophyta
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Cycads
... filled micropyle and is drawn into the pollen chamber as the water evaporates. tube generative prothallial cell cell cell The pollen grain is made up of three cells (left). Cycads, unlike ... tube nucleus entering the pollen tube which grows through and parasitizes the megasporangium. The generative cell ultimately forms multiflagellate sperm cells. These swim down the tube, enter the archegonium and ...
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The Pines
... been reduced to a single prothallial cell. The air bladders assist the pollen in being blown by the wind to a female cone. prothallial cell generative cell tube cell air bladder Biodisc photomicrograph Female ... forming archegonia, each with an egg cell. In the pollen tube, 2 non-motile sperm cells develop from one of the cells formed from the generative cell. Pinus female gametophyte developing by ...
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Glossary of Pollen and Spore Terminology - Part 2 (D-H)
... base, higher than 1µm, and that has approximately the same width as its height. Generative cell The cell in a pollen grain which divides to form male gametes (Jackson, 1928). Geniculum (pl ...
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Glossary of Pollen and Spore Terminology - Part 2 (D-H)
... base, higher than 1µm, and that has approximately the same width as its height. Generative cell The cell in a pollen grain which divides to form male gametes (Jackson, 1928). Geniculum (pl ...
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Gymnosperms
... several mitotic divisions eventually resulting in a pollen grain with 2 viable nuclei (generative cell and tube cell) and several vestigial prothallial cells - remnants of the vegetative portion. The pollen grain ... pollen tube grows, digesting it as it grows. As it grows, the generative cell divides, forming stalk cell & body cell, which then divides to form 2 sperm nuclei. A mature male gametophyte ...
www.cs.cuc.edu

BI 102 Spring 2003
... or pollen grain. One cell of the pollen grain is called the generative cell for it will produce (generate) two sperm nuclei, the other cell is the tube cell. The tube cell will elongate forming ... young the ovule contains a megasporagium. Within the megasporangium a single megasporocyte (megaspore mother cell) undergoes meiosis. Only one of the four haploid spores produced is a viable megaspore. ...
una.edu

Hyphal Structure Questions
... hyphae elongate? Type your answer here Submit Answer 6 Answer 6 Turgor pressure within the cell provides the pressure to ensure expansion. Selective release of enzymes at the tip ensures turgor ... hyphae which are found in characteristic locations in complex structures. The most common type, called generative, have a typical morphology. They may be supported by skeletal hyphae which are thick walled ...
bugs.bio.usyd.edu.au

Genetic Extra Credit LM 53-54
... forming haploid microspores (each mother cell dividing into four microspores). The microspores develop into binucleate pollen grains, each containing a tube nucleus and a generative nucleus. When the pollen ... containing a generative nucleus and a tube nucleus. After the pollen grain germinates into a pollen tube, the generative nucleus divides into two sperm nuclei. Because the generative nucleus ...
waynesword.palomar.edu

Exam #3 Hints
... forming haploid microspores (each mother cell dividing into four microspores). The microspores develop into binucleate pollen grains, each containing a tube nucleus and a generative nucleus. When the pollen ... containing a generative nucleus and a tube nucleus. After the pollen grain germinates into a pollen tube, the generative nucleus divides into two sperm nuclei. Because the generative nucleus ...
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