Extranuptial nectaries in Carapa Aubl. (Meliaceae-Cedreloideae)

Adansonia

Maurice Tindo¹  David Kenfack¹  Mathieu Gueye¹ 

关键词: Carapa;    extrafloral nectaries;    Meliaceae;    myrmecophily;    pericarpial nectaries;    petaline nectaries;    Carapa;    Meliaceae;    myrmécophilie;    nectaires extrafloraux;    nectaires péricarpiaux;    nectaires pétalaires;   

DOI  :  10.5252/a2014n2a13

学科分类：植物学

来源: Museum National d Histoire Naturelle

【 摘 要 】

Ant-plantinteractionsmediatedbyspecialstructuresprovidedbyplantssuchasdomatia,extrafloralnectaries(EFNs)andfoodbodies,areveryfrequentintropicalecosystems.TounderstandwhyantsarefrequentlyencounteredonmostspeciesofCarapaAubl.(Meliaceae),weinvestigatedthepresenceofextranuptialnectaries(ENNs)inall27speciesofthegenus,spanningitsentiredistributionalrangeintropicalAfricaandAmerica.Wereportforthefirsttimeinthegenustheoccurrenceofextrafloralnectaries(atthebaseofthepetiole,alongtherachisofthepinnatelycompoundleaf,onbracts)petalinenectaries(ontheoutersurfaceofpetals),andpericarpialnectaries(onthesurfaceoffruits),andconfirmthepresenceofnectariesonleafletsinCarapa.Petiolarnectariesarethemostcommon,occurringin85%ofthespecies.Nectariesweremainlyactiveinyoungdevelopingplantorgans.Antswereobservedforagingonexudatesfromthesenectaries.ThesecretionsfromtheseglandshelptoexplaintheabundanceofantsonCarapatrees.AlthoughsimilarnectarieswerealsofoundinothermembersofthesubfamilyCedreloideae,theirpositionandfrequencyprovidenewcharactersfortheidentificationofCarapaspeciesinthefieldandtheherbarium.Asinothermyrmecophilousplants,ENNsprobablyconferadaptiveadvantagestoCarapatrees.

【 授权许可】

Unknown