Flower vascularisation in Solanaceae: a particular pattern in Metternichia J.G.Mikan

Adansonia

María Teresa Cosa¹  Gloria E. Barboza¹  Iris Josefina Liscovsky¹ 

关键词: Solanaceae;    Metternichia;    anatomy;    flower vascularisation;    Solanaceae;    Metternichia;    anatomie;    vascularisation de la fleur;   

DOI  :  10.5252/a2009n2a11

学科分类：植物学

来源: Museum National d Histoire Naturelle

【 摘 要 】

ThedelimitationandrelationshipofseveralgeneraofSolanaceaearenotresolvedyet.ThesystematicpositionofMetternichiaprincipisJ.G.Mikanhaslongbeendiscussed;recentlyitwassplitfromCestreaeG.DontoamonotypictribeMetternichieaeMiers.ThelastproposalwassupportedmainlybytheparticularchromosomenumberofMetternichia.Inaddition,somepollen,antherandseedcharacterswereusedtoseparateMetternichiafromSesseaRuizamp;Pav.,thegenusmorphologicallymostcloselyrelated.Ananatomicalandvascularanalysisoftheflowerwasconductedtolookforcharactersthatcontributetoitssystematicposition.TheplacentaltissueplacedinthebaseoftheseptumhasneverbeendescribedbeforeinotherSolanaceaespecies.Moreover,theprocessofformationofthemiddlepetals,staminalbundlesandthetwovasculararcsplacedonthebaseoftheovary,areparticularitiesthathavenotbeenreportedbeforeinthefamily.ThepresenceoftwovasculararcsonthebaseoftheovaryseemstobeprimitivefeaturesinthefamilyasithappensinHumbertiamadagascariensisLam.(Convolvulaceae).Thevascularcharactersinadditiontochromosomal,pollen,antherandseedcharacters,postulatedbyotherauthors,supporttheindependenceofM.principisfromCestreae.Resultsarediscussedandcomparedwithpreviousreportsonthefamily.

【 授权许可】

Unknown