Plantă dioică

Laurul (Ilex aquifolium) este o plantă dioică. Sus o ramură cu flori mascule. În dreapta sus – o floare masculă (mărită) cu stamine și polen; pistilul este redus, steril. Jos o ramură cu flori femele. Dreapta jos o floare femelă (mărită) cu pistil dezvoltat și stamine reduse sterile fără polen.

Plantele dioice (din greaca dis = doi; oikos = casă, gazdă) sau plantele dioecice sunt plante cu flori unisexuate sau dicline la care florile mascule se află pe o plantă, iar cele femele pe altă plantă, deci pe indivizi separați, astfel încât unele exemplare ale aceleiași specii au numai flori femele, iar altele numai flori mascule. La plantele dioice este prevenită autopolenizarea (polenizarea florilor cu propriul lor polen).

Un exemplu de plantă dioică este cânepa (Cannabis sativa), la care "cânepa de vară" este masculă, iar "cânepa de toamnă" femelă. Plante dioice mai sunt măcrișul (Rumex acetosa), hameiul (Humulus lupulus), urzica (Urtica dioica), spanacul (Spinacia oleracea), precum și unii arbori ca salcia (Salix sp.,), plopul (Populus sp.), curmalul (Phoenix dactylifera), dudul (Morus sp.), tisa (Taxus baccata) etc.

Florile care au atât androceu cât și gineceu se numesc bisexuate sau hermafrodite, de exemplu ulmul (Ulmus), teiul (Tilia), iar cele care conțin numai organele unui singur sex (stamine sau carpele) sunt unisexuate, de exemplu stejarul (Quercus robur). Plantele cu flori unisexuate pot fi monoice, cu flori mascule și femele pe același exemplar de exemplu fagul (Fagus sylvatica), stejarul (Quercus robur), dioice, cu florile mascule și femele pe exemplare diferite, existând indivizi masculi și indivizi femeli de exemplu plopul (Populus), salcia (Salix), trioice, cu unii indivizi masculi, alții femeli și alții cu flori bisexuate (mascule și femele), de exemplu milițea (Silene nutans), săpunarița (Saponaria officinalis), poligame, la care se întâlnesc pe același individ flori mascule, flori femele și bisexuate de exemplu frasinul (Fraxinus excelsior), arțarul (Acer platanoides).

Note


Legături externe

Read other articles:

The Spark (song)

This article is about the 2013 song by Afrojack. For other uses, see Spark (disambiguation). 2013 single by Afrojack featuring Spree WilsonThe SparkSingle by Afrojack featuring Spree Wilsonfrom the album Forget the World Released11 October 2013Genre Electro house dance-pop Length 4:03 (Radio Edit) 6:55 (Club Edit) Label Wall Recordings PM:AM Universal Island Def Jam Songwriter(s) Nick van de Wall Joseph Young III Mark Maxwell Producer(s)AfrojackAfrojack singles chronology As Your Friend (...

 

Messier 48

Messier 48Data pengamatan (J2000 epos)Rasi bintangHydraAsensio rekta08h 13.7mDeklinasi-05° 45′Jarak1.5 kly (460 Pc)Magnitudo tampak (V)5.5Dimensi tampak (V)54.0′Karakteristik fisikPerkiraan umur300 juta tahun[butuh rujukan]Nama lainNGC 2548Lihat pula: Gugus bola, Daftar gugus bola Messier 48 atau M48 (juga disebut NGC 2548) adalah sebuah gugus bintang terbuka yang terletak di rasi bintang Hydra. M48 ditemukan oleh Charles Messier pada tahun 1771. Sebenarnya tidak ada gugus b...

 

العلاقات الأرجنتينية الغينية

العلاقات الأرجنتينية الغينية الأرجنتين غينيا   الأرجنتين   غينيا تعديل مصدري - تعديل   العلاقات الأرجنتينية الغينية هي العلاقات الثنائية التي تجمع بين الأرجنتين وغينيا.[1][2][3][4][5] مقارنة بين البلدين هذه مقارنة عامة ومرجعية للدولتين: وجه ال...

Ali Moertopo

Artikel ini membutuhkan rujukan tambahan agar kualitasnya dapat dipastikan. Mohon bantu kami mengembangkan artikel ini dengan cara menambahkan rujukan ke sumber tepercaya. Pernyataan tak bersumber bisa saja dipertentangkan dan dihapus.Cari sumber: Ali Moertopo – berita · surat kabar · buku · cendekiawan · JSTOR Ali MoertopoAli Moertopo di acara penutupan FFI 1982 Menteri Penerangan Indonesia Ke-21Masa jabatan29 Maret 1978 – 19 Maret 1983...

 

Stūpa

Le stūpa Dhāmek de Sārnāth, en Inde. Un stūpa ou stupa[1],[2] ou stoupa[3] (sanskrit : स्तूप; traduction : reliquaire[4] ; birman : zedi) est une structure architecturale bouddhiste et jaïna que l'on trouve dans le sous-continent indien, dont il est originaire, mais aussi dans le reste de l'Asie, où il a suivi l'expansion du bouddhisme. C'est à la fois une représentation aniconique du Bouddha et un monument commémorant sa mort ou parinirvana. Selon l'in...

 

Spotify

Spotify Ltd.URLwww.spotify.comTipelayanan streaming musik, podcast directory, Program komputer, aplikasi seluler, komunitas daring dan pemerekan RegistrationDiperlukanSubjek utamalayanan daring, musik dan Industri musik Langue70 bahasaPenggunaGratis: 190 jutaPremium: 155 jutaTotal: 345 juta (4 Januari 2021[update])Bahasa pemrogramanPython, C++, JavaPembuatDaniel Ek dan Martin Lorentzon Web DeveloperSpotify Service entry7 Oktober 2008; 15 tahun lalu (2008-10-07)Tempat pembentukanS...

Barnes-Wallace v. Boy Scouts of America

Lori and Lynn Barnes-Wallace, Michael and Valerie Breen v. City of San Diego and the Boy Scouts of America - Desert Pacific CouncilCourtUnited States Court of Appeals for the Ninth CircuitFull case nameBarnes-Wallace v. Boy Scouts of AmericaArguedJune 20th 2010DecidedDecember 20th 2012Case historyPrior history2003 ruling by the District Court in favor of the plaintiffsHoldingThe leases do not violate the No Aid Clause or the No Preference Clause of the California Constitution, or the federal...

 

Leopold Figl

Servant of GodLeopold FiglFigl sebagai Gubernur Austria Hilir sekitar tahun 1962 Presiden Austria Pelaksana tugasMasa jabatan31 Desember 1950 – 21 Juni 1951PendahuluKarl RennerPenggantiTheodor KörnerKanselir AustriaMasa jabatan20 Desember 1945 – 2 April 1953PresidenKarl RennerTheodor KörnerWakilAdolf SchärfPendahuluKarl Renner (pelaksana tugas)PenggantiJulius RaabMenteri Luar NegeriMasa jabatan26 November 1953 – 9 Juni 1959KanselirJulius RaabPendahuluKarl G...

 

Taiwan and weapons of mass destruction

Weapons of mass destruction By type Biological Chemical Nuclear Radiological By country Albania Algeria Argentina Australia Brazil Bulgaria Canada China Egypt France Germany India Iran Iraq Israel Italy Japan Libya Mexico Myanmar Netherlands North Korea Pakistan Philippines Poland Rhodesia Romania Russia (Soviet Union) Saudi Arabia South Africa South Korea Spain Sweden Switzerland Syria Taiwan Ukraine United Kingdom United States Proliferation Chemical Nuclear Missiles Treaties List of treat...

Landau in der Pfalz

Landau in der PfalzCittà extracircondariale Landau in der Pfalz – Veduta LocalizzazioneStato Germania Land Renania-Palatinato DistrettoNon presente CircondarioNon presente TerritorioCoordinate49°11′58″N 8°07′23″E / 49.199444°N 8.123056°E49.199444; 8.123056 (Landau in der Pfalz)Coordinate: 49°11′58″N 8°07′23″E / 49.199444°N 8.123056°E49.199444; 8.123056 (Landau in der Pfalz) Altitudine142 m s.l.m. Superficie82,...

 

Стеллерова корова

† Стеллерова корова Муляж стеллеровой коровы в Лондонском музее естествознания Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:Челюстно�...

 

Kwartir Cabang

Kwartir Cabang (Kwarcab) adalah satuan organisasi yang mengelola Gerakan Pramuka di tingkat Kota / Kabupaten. Berdasarkan tingkatan/wilayahnya, Kwarcab berkedudukan di masing-masing Kota/Kabupaten. Pengurus Kwarcab diketuai oleh Ketua Kwarcab (disingkat Ka Kwarcab). Pengurus Kwartir Cabang (Kwarcab)[1] Ketua Kwarcab ditetapkan oleh Musyawarah Cabang untuk masa bakti berikutnya, dan dilantik oleh Ketua Presidium Pimpinan Mucab. Pengurus Kwarcab dibentuk oleh Mucab melalui tim formatur,...

Annie Lennox discography

This article is about Annie Lennox's solo career. For works within Eurythmics, see Eurythmics discography. Annie Lennox discographyAnnie Lennox performing at the Rally For Human Rights during the International AIDS Conference 2010 in ViennaStudio albums6Compilation albums1Video albums4Music videos23EPs1Singles23B-sides15Soundtrack albums1 This article is the discography of the Scottish pop and rock singer-songwriter Annie Lennox. After a decade of major international success as part of Euryt...

 

جامعة كاتانيا

جامعة كاتانيا   معلومات التأسيس 19 أكتوبر 1434  الموقع الجغرافي إحداثيات 37°30′13″N 15°05′12″E / 37.5036°N 15.0867°E / 37.5036; 15.0867   المكان قطانية  البلد إيطاليا  رقم الهاتف 095 7307777[1]،  و800644590  إحصاءات عدد الطلاب 44338 (2016)[2]  عضوية أورسيد  [لغات أخرى]&...

 

Liverpool West Derby (UK Parliament constituency)

Parliamentary constituency in the United Kingdom, 1885 onwards Liverpool, West DerbyBorough constituencyfor the House of CommonsBoundary of Liverpool, West Derby in MerseysideLocation of Merseyside within EnglandCountyMerseysideElectorate62,709 (December 2010)[1]Current constituencyCreated1885Member of ParliamentIan Byrne (Labour Party)SeatsOneCreated fromLiverpool Liverpool, West Derby is a constituency[n 1] represented in the House of Commons of the UK Parliament since 2019 ...

Red Foley

Untuk penulis olahraga, lihat Red Foley (penulis olahraga). Red FoleyInformasi latar belakangNama lahirClyde Julian FoleyNama lainMr. Country MusicLahir(1910-06-17)17 Juni 1910AsalBlue Lick, Kentucky, ASMeninggal19 September 1968(1968-09-19) (umur 58)Fort Wayne, Indiana, ASGenreCountrygospelrockabillyboogierhythm and bluesPekerjaanpenyanyi-penulis lagu, musisi, pembawa acara TV dan radio, aktorInstrumengitar, banjoTahun aktif1930–1968LabelConqueror, Melotone, DeccaArtis terkaitThe Cumb...

 

زويلو سالدومبيدي

زويلو سالدومبيدي   معلومات شخصية الاسم الكامل زويلو سالدومبيدي الميلاد 26 أكتوبر 1903(1903-10-26)مونتيفيديو تاريخ الوفاة ديسمبر 4, 1981 (عن عمر ناهز 78 عاماً) مركز اللعب المهاجم الجنسية الأوروغواي  المسيرة الاحترافية1 سنوات فريق م. (هـ.) 1923–1926 مونتيفيديو واندررز 1927–1934 ناسيونا...

 

Prison des Chantiers

Ne doit pas être confondue avec la maison d'arrêt de Versailles Prison des Chantiers Des femmes de la Commune, photomontage des détenues de la prison des Chantiers. Ernest-Charles Appert, 1872, musée Carnavalet, Paris. Localisation Pays France Région Île-de-France Département Yvelines Localité Versailles Quartier Chantiers Coordonnées 48° 47′ 49″ nord, 2° 08′ 04″ est Géolocalisation sur la carte : Versailles Prison des Chantiers Géoloca...

News aggregator

Client software that aggregates syndicated web content This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these template messages) This article is written like a personal reflection, personal essay, or argumentative essay that states a Wikipedia editor's personal feelings or presents an original argument about a topic. Please help improve it by rewriting it in an encyclopedic style. (June 2017) (Learn how and when ...

 

سلطة كبريزة

سلطة كَبريزَةcaprese (بالإيطالية) معلومات عامةالمنشأ إيطاليا المكونات الرئيسية موتزاريلا طماطم basil (en) زيت الزيتون تعديل - تعديل مصدري - تعديل ويكي بيانات سلطة قَبْرِيَّة أو كَبْرِيزَة أو كابريزي هي طبق سلطة من المطبخ الإيطالي، تُحضّر من شرائح الطماطم الطازجة وشرائح مُزَرِلَ�...