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The spermatozoid of Zamia chigua Seem



The spermatozoid of Zamia chigua Seem



Botanical gazette: 138 (4) 409-412



Z. chigua, a large arborescent cycad of the Pacific coast of Columbia, produces 2 large spermatozoids per pollen tube. After fixation and embedment in glutaraldehyde-OsO4, the diamter of the spermatozoid is approximately 400 .mu.m. This about 100 .mu.m larger than the greatest dimension reported for any other cycad. Unlike other cycads in which spermatogenesis is seasonal, spermatogensis in Z. chigua is continuous throughout the year.

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Accession: 017481038

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