4.1 Article

Comparative root and leaf anatomy of the Turkish Iris subgenus Scorpiris and their taxonomic and phylogenetic utility

Journal

PLANT BIOSYSTEMS
Volume 156, Issue 6, Pages 1325-1335

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/11263504.2022.2048275

Keywords

Iris; leaf anatomy; microscopic techniques; root anatomy; taxonomy

Categories

Funding

  1. Selcuk University, BAP Project [10201025]

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Root and leaf anatomy have great potential in aiding with species identification and taxonomy clarification in the genus Iris. This study focused on the taxonomically challenging group, Iris subgen. Scorpiris, and found significant variation in root anatomy but not in leaf anatomy. The results suggest that root anatomical traits can serve as additional characters for correct species identification in this group.
The genus Iris is an economically and ornamentally important genus in the family Iridaceae. Root and leaf anatomy have great potential to aid with species identification and clarify taxonomy of plant species within the family. Iris subgen. Scorpiris are a taxonomically difficult group due to morphological character variation and overlapping geographical distribution. Thus, additional morphological characters need to be articulated for correct identification and to define species boundaries in the group. Here, we studied root (nine characters) and leaf (10 characters) anatomical traits of seven species in the Iris subgen. Scorpiris in detail to evaluate their taxonomic value. Significant variation was found in the transverse section of the root (i.e. exodermis, cortex cells, endodermis, pericycle, xylem and phloem) but not in leaf anatomy. Hence, root anatomical traits can be used as additional characters for correct identification of species within the Iris subgen. Scorpiris. Box plots, principal component analyses and one-way analysis of variance were performed using quantitative characters for the studied species. Our results demonstrate that the number of exodermis layers, protoxylem and metaxylem numbers in the roots are of phylogenetic value in the studied species.

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