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Definition: apomixis from Dictionary of the Fungi

(adj. apomictic), the development of sexual cells into spores, etc., without being fertilized. Cf. amphimixis, automixis, and pseudomixis.


apomixis

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Reproduction in flowering plants without the fusion of gametes. The term covers all types of asexual reproduction, including vegetative reproduction in which a plant is propagated by organs other than the sex organs in the flower, and agamospermy, in which seeds are produced without fertilization. Because the plant embryos grow from egg cells without being fertilized by pollen, the seeds that are formed are clones of each other and of the mother plant. Genetically modified plants that reproduce using apomixis are therefore much less likely to lead to accidental gene transfer to wild populations than those that reproduce sexually. Apomixis is especially common in the grass, rose, and aster families. Agamospermy is a degenerate form of sexual reproduction and the fruits and seeds that are produced have a perfectly normal appearance and are dispersed in the normal way. It is therefore difficult to detect when a plant is reproducing agamospermically without studying it under controlled…
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Full text Article apomixis

From Penguin Dictionary of Biology
Most common in botanical contexts. AGAMOSPERMY , reproduction which has the superficial appearance of ordinary sexual reproduction (amphimixis) but occurs without fertilization and/or meiosis. Affords the advantages of the seed habit (dispersal, and survival through unfavourable conditions) without…
| 203 words
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Full text Article apomixis

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Reproduction in flowering plants without the fusion of gametes. The term covers all types of asexual reproduction, including vegetative reproduction in which a plant is propagated by organs other than the sex organs in the flower, and agamospermy, in which seeds are produced without fertilization. …
| 307 words
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Full text Article apomixis

From Britannica Concise Encyclopedia
| 68 words
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Full text Article apomixis

From The American Heritage(R) Dictionary of the English Language
| 39 words
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Full text Article apomixis

From The Chambers Dictionary
| 44 words
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Full text Article apomixis

From The Macquarie Dictionary
| 39 words

Full text Article apomixis

From Collins English Dictionary
| 40 words
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Full text Article apomixis

From Merriam-Webster's Collegiate(R) Dictionary
| 38 words
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Full text Article apomixis

From The American Heritage Dictionary of Medicine
| 17 words
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Full text Article apomixis (apogamy)

From Dictionary of Developmental Biology and Embryology
| 24 words
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