Flower vascularisation in Solanaceae: a particular pattern in Metternichia J.G.Mikan
[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.
[发布日期] [发布机构]
[效力级别] [学科分类] 植物学
[关键词] Solanaceae;Metternichia;anatomy;flower vascularisation;Solanaceae;Metternichia;anatomie;vascularisation de la fleur [时效性]
