| 单词 |
zooxanthella |
| 释义 |
zooxanthella Bot.|ˌzəʊəʊzænˈθɛlə|
Also Zoo-. Pl. -æ.
[mod.L. (coined in Ger. by K. Brandt 1881, in Arch. für Anat. & Physiol.: Physiol. Abt. 572), f. zoo- + xantho- + L. -ella (see -el2).]
One of the numerous yellow-brown unicellular organisms present in the cytoplasm of many radiolarians, corals, and other marine invertebrates, probably as symbionts.
1889in Cent. Dict. 1899,1924[see zoochlorella]. 1967Noland & Gojdics in T.-T. Chen Res. Protozool. II. 238 The zooxanthellae found in Radiolaria and Foraminifera (as well as in some lower invertebrates) are probably specialized dinoflagellates or cryptomonads. Presumably they play the same role that zoochlorellae do in fresh⁓water forms, but a mutually beneficial relationship has not been experimentally proved. 1972[see zoochlorella]. 1975Nature 6 Nov. 37/1 The only chlorophyll in corals is contained in the brown zooxanthellae. 1983McGraw-Hill Yearbk. Sci. & Technol. 150/1 All the available evidence suggests that the nudibranchs have evolved mechanisms to maintain healthy populations of zooxanthellae in their tissues and are able to extract photosynthetic products from the dinoflagellate partner. |
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