| 单词 | nucellar embryony |
| 释义 | > as lemmasnucellar embryony nucellar embryony n. [compare German Nuzellarembryonie (1905 as Nucellarembryonie, or earlier)] Botany a form of apomixis occurring in certain seeds (esp. those of citrus plants) in which embryos genetically identical to the parent plant develop from the nucellar tissue. ΚΠ 1932 C. D. Darlington in Amer. Naturalist 66 44 The genetic property of permitting..the development of unspecialized tissue into an embryo (apospory, apogamy, nucellar embryony). 1943 Bot. Gaz. 105 224/2 Three forms of polyembryony are therefore known in Citrus: (a) nucellar embryony, giving rise to a variable number of identical seedlings. [Etc.] 2006 M. Rieger Introd. Fruit Crops 169 Lack of nucellar embryony in some tangerines has simplified the production of hybrid cultivars. < as lemmas |
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