Petiole Anatomical Study in Some Taxa of the Genus Alcea (Malvaceae) from Iran
Ključne besede:
anatomy, cluster analysis, morphometry, SPSS, taxonomy.Povzetek
Različne vrste rodu Alcea zaradi prisotnosti sluznih spojin veljajo za dragocene zdravilne rastline v tradicionalni medicini in farmacevtski industriji. V zadnjih letih so bile izvedene številne biosistematske študije, da bi prispevale k reševanju vprašanj klasifikacije in identifikacije vrst. V tej študiji so bile raziskane anatomske značilnosti pecljev pri 15 taksonih rodu Alcea v Iranu. Srednji deli listnih pecljev v spodnjem delu socvetja so bili narezani, dvojno obarvani in fotografirani pod mikroskopom. Najpomembnejše lastnosti, ki so bile preučene v tej študiji, so bile število plasti celic v kolenhimu, parenhimu in klorenhimu v skorji, debelina in število plasti sklerenhimskih vlaken v floemu ter struktura žilnih snopov. Na podlagi anatomskih značilnosti pecljev je bila izvedena klastrska analiza na podlagi evklidske razdalje z uporabo Wardove metode povezovanja. Rezultati klastrske analize so pokazali, da so bili nekateri tesno povezani taksoni združeni, medtem ko se umestitev drugih ni ujemala s taksonomsko bližino. Ugotovitve te raziskave kažejo, da se nekatere anatomske značilnosti pecljev, opažene pri tesno sorodnih vrstah, lahko uporabijo le za identifikacijo vrst, manj pa za taksonomsko združevanje.
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