cleistogamous

Lemma

cleistogamous

Etichetta di dominio

EN

Etichetta grammaticale

adj.

Definizione

Characterized by or being small inconspicuous closed self-pollinating flowers additional to and often more fruitful than showier ones on the same plant. 1

Nota

Cleistogamy insures that a plant produces seeds, even if conditions are unfavorable for wind or insect pollination. Cleistogamy occurs in many different and unrelated plant families, including violets (Violaceae), rushes (Juncaceae) and grasses (Poaceae). Some water lilies (Nymphaeaceae) produce cleistogamous flowers that do not open in rainy weather. The pollen of many angiosperms is damaged by water. In sunny weather, the flowers are open (chasmogamous) and pollinated by insects. There are unconfirmed reports of insect pollinated plants in Timbuctu that produce cleistogamous flowers when the ground temperature is too hot for crawling insects. 2

Ten white (Trebbiano toscano, Malvasia, Grillo, etc.) and 12 red (Sangiovese, Merlot, Cabernet Sauvignon, etc.) grapevine cvs were studied for their cleistogamous behavior by fluorescence microscopy. Marked differences between white and red cvs could be found. In 60 % (resp. 80 %) of white cvs studied pollen was found on stigma 24 h (resp. 12 h) before onset of flowering; with red cvs data were 41 % and 12 h, respectively. 3

Contesto

The genus Leea is the closest relative of the grape family, Vitaceae, but its systematics and ecology are unknown. […] In spite of the cleistogamous floral architecture, Leea is non-autogamous, protandrous and dependent on insect-pollination. 4

Trascrizione fonetica

[klī-ˈstä-gə-məs] 5

Sinonimi e Antonimi

Cleistogamic. 6

Abbreviazioni

CL 7

Etimologia

Cleisto: closed, from to close: c.1205, "to shut, cover in," from O.Fr. clos- pp. stem of clore "shut," from L. clausus, pp. of claudere "to close, block up, put an end to, enclose, confine," from PIE base *klau- "hook, crooked or forked branch" (used as a bar or bolt in primitive structures); cf. L. clavis "key," clavus "nail," claustrum "bar, bolt, barrier," claustra "dam, wall, barricade, stronghold;" Gk. kleidos "bar, bolt, key," klobos "cage;" O.Ir. clo "nail;" O.C.S. kljucu "hook, key," kljuciti "shut;" Lith. kliuti "to catch, be caught on," kliaudziu "check, hinder," kliuvu "clasp, hang;" O.H.G. sliozan "shut," Ger. schließen "shut," Schüßel "key;" M.Ir. clithar "hedge, fence." Replaced O.E. beclysan. 8

Gamic: from gamete "sexual protoplasmic body," 1886, name introduced in Mod.L. by Austrian biologist Gregor Mendel (1822-84), from Gk. gamete "a wife," gametes "a husband," from gamein "to take to wife, to marry," from PIE base *gem(e)- "to marry" (cf. Gk. gambros "son-in-law, father-in-law, brother-in-law;" Skt. jamih "brother, sister," jama daughter-in-law;" Avestan zama-tar "son-in-law;" L. gener "son-in-law"). This also is the source of the suffix in monogamy, etc. 9 (Gk. gamos "marrying"). 9

Etichetta di paese
ND
Ente

Università degli Studi di Genova, Facoltà di Lingue e Letterature Straniere

Data della scheda
Tue Nov 13 00:00:00 2007
Autore

Paola Casagrande rev. Gerbaudo

Fonti

1 : «http://www.m-w.com/dictionary/cleistogamic», (20/09/2007)

2 : «http://waynesword.palomar.edu/termfl2.htm», (02/11/2007)

3 : «http://www.vitis-vea.de/Englisch/info.php?auswahl=40323», (27/10/2011)

4 : «http://www.2006.botanyconference.org/engine/search/index.php?func=detail&aid=537», (11/11/2007)

5 : «http://www.m-w.com/dictionary/cleistogamic», (20/09/2007)

6 : «http://www.synonym.com/synonyms/cleistogamous/», (27/10/2011)

7 : «http://www.thefreelibrary.com/The+cleistogamous+breeding+system%3a+a+review+of+its+frequency%2c...-a0162455876», (27/10/2011)

8 : «http://www.etymonline.com/index.php?search=close&searchmode=none», (21/09/2007)

9 : «http://www.etymonline.com/index.php?term=gamete», (21/09/2007)

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