{"refrec":{"BRefID":26377,"RR":"<b>Forni-Martins, E.R.; Calligaris, K.P.</b> (2002). Chromosomal studies on neotropical Limnocharitaceae (Alismatales). <i>Aquat. Bot. 74(1)</i>: 33-41","BEntID":26377,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Aquat. Bot. 74(1)</i>: 33-41","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Forni-Martins, E.R.; Calligaris, K.P.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Forni-Martins, E.R.; Calligaris, K.P.","Englishabstract":"The family Limnocharitaceae comprises three genera of herbaceous aquatic plants: <i>Limnocharis</i> and <i>Hydrocleys</i>, naturally found in Neotropical regions, and <i>Butomopsis</i>, found in Paleotropical regions. In order to analyze the karyotypic characteristics of the Neotropical genera, root tips of <i>L. flava</i>,<i> L. laforestii</i> and <i>H. nymphoides</i> were cytologically prepared. The average karyotypes were constructed based on 10 metaphasic cells for each species. The chromosome numbers found were 2n = 20 for <i>L. flava</i> and <i>L. laforesti</i> and 2n = 16 for <i>H. nymphoides</i>. In all species, the chromosome length varied gradually and the highest quantity of chromatinic material was found in <i>H. nymphoides</i> (total chromatin length, TCL = 58.6 µm), as compared with <i>L. flava</i> and <i>. Laforestii</i> (TCL=51.0 and 41.9µm, respectively). About 75% of the chromosomes were acrocentric and all three species presented asymmetric karyotypes, with TF% rates equal to 17.8% (<i>L. flava</i>), 15.3% (<i>L. laforestii</i>) and 19.7% (<i>H. nymphoides</i>). Taking karyotypic asymmetry as a derivative character, it is concluded that, in the family Limnocharitaceae, the derivation may have been accompanied by an increase in reproductive elements (mainly carpels) and chromosome number. Chromosome fragmentation would have led to both higher chromosome numbers and karyotypic asymmetry.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Chromosomal studies on neotropical Limnocharitaceae (Alismatales)","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":"Karyotype; <i>Limnocharis</i>; <i>Hydrocleys</i>; Chromosome; Karyotype evolution","Notes":null,"AnaPub":2002,"MonPub":null,"DateUpdate":"2003-04-17","DateCreate":"2002-08-19","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000177681200003","VABBcode":null,"OpenAcc":0},"refs":null,"anarec":{"AnaID":26377,"PubliDate":2002,"Pagination":"33-41","XtraPublOfAnaID":null,"ISBN":null,"Volume":"74","Issue":"1","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42195,"SerRR":"Aquatic Botany. 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