nucellaradj.

Brit.

/njuːˈsɛlə/, U.S.

/n(j)uˈsɛlər/

Origin: A borrowing from French, combined with an English element. Etymons: French nucelle , -ar suffix¹.

Etymology: < French nucelle nucellus n. + -ar suffix¹.

Botany.

Of, relating to, or involving the nucellus; derived from or produced in the nucellus.

ΘΚΠ

the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > relating to or having ovule

anatropal1835

campylotropal1835

campylotropous1835

chalazal1835

atropous1839

anatropous1847

atropal1857

hemianatropous1857

hemitropous1860

hemitropal1864

nucellar1880

ovulate1890

1880 Jrnl. Royal Microsc. Soc. 3 980 There is as yet no nucellar tissue.

1887 W. Hillhouse tr. E. Strasburger Pract. Bot. xxvii. 304 The nucellar apex [Ger. Knospenwarze (1854)] is hollowed out in order to receive the pollen-grains, giving rise to the so-called pollen-chamber.

1925 Amer. Jrnl. Bot. 12 52 The cells are nucleated and may very well be of nucellar origin.

1949 C. D. Darlington & K. Mather Elements of Genetics 406 Nucellar embryony, a form of apomixis where the embryo arises directly from the nucellus.

1953 K. Esau Plant Anat. xviii. 555 The nucellar epidermis is sometimes highly resistant and may proliferate into a nucellar cap with relatively thick walls.

1972 Theoret. & Appl. Genetics 42 314 (heading) Differentiation between nucellar and zygotic citrus seedlings by leaf shape.

1989 Nature 20 July 225/2 The nucellar tip is composed of the same tissue but has smaller epidermal cells.

Compounds

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.

This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022).

单词	nucellar
释义	nucellaradj. Brit. /njuːˈsɛlə/, U.S. /n(j)uˈsɛlər/ Origin: A borrowing from French, combined with an English element. Etymons: French nucelle , -ar suffix¹. Etymology: < French nucelle nucellus n. + -ar suffix¹. Botany. Of, relating to, or involving the nucellus; derived from or produced in the nucellus. ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > [adjective] > having or relating to parts > relating to or having ovule anatropal1835 campylotropal1835 campylotropous1835 chalazal1835 atropous1839 anatropous1847 atropal1857 hemianatropous1857 hemitropous1860 hemitropal1864 nucellar1880 ovulate1890 1880 Jrnl. Royal Microsc. Soc. 3 980 There is as yet no nucellar tissue. 1887 W. Hillhouse tr. E. Strasburger Pract. Bot. xxvii. 304 The nucellar apex [Ger. Knospenwarze (1854)] is hollowed out in order to receive the pollen-grains, giving rise to the so-called pollen-chamber. 1925 Amer. Jrnl. Bot. 12 52 The cells are nucleated and may very well be of nucellar origin. 1949 C. D. Darlington & K. Mather Elements of Genetics 406 Nucellar embryony, a form of apomixis where the embryo arises directly from the nucellus. 1953 K. Esau Plant Anat. xviii. 555 The nucellar epidermis is sometimes highly resistant and may proliferate into a nucellar cap with relatively thick walls. 1972 Theoret. & Appl. Genetics 42 314 (heading) Differentiation between nucellar and zygotic citrus seedlings by leaf shape. 1989 Nature 20 July 225/2 The nucellar tip is composed of the same tissue but has smaller epidermal cells. Compounds 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. This entry has been updated (OED Third Edition, December 2003; most recently modified version published online March 2022). < adj.1880
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