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Ayeni, Oluwaseyi Blessing; Jimoh, Mahboob Adekilekun; Saheed, Sefiu Adekilekun
Nordic journal of botany, 06/2015, Volume: 33, Issue: 3Journal Article
Leaf anatomical characters of twelve species from the genus Cyperus , a genus known to contain species with both C 3 and C 4 plants, have been investigated. We investigated and established the usefulness of all‐inclusive functional leaf anatomical characters for identifying the photosynthetic pathways of these species. The species investigated were C. articulatus L., C. compressus L., C. difformis L., C. dilatatus Schum. & Thonn., C. distans L., C. esculentus L., C. haspan L., C. imbricatus Retz., C. iria L., C. rotundus L., C. sphacelatus Rottb. and C. tenuiculmis (Boeck.) Hooper, collected from locations in southwestern Nigeria. Standard anatomical procedures for examining epidermal and cross sections of leaves were employed. Our data suggested that a combination of characters, such as the occurrence of Kranz tissue, maximum cell distant count, maximum lateral cell count, interveinal distance, and to some extent leaf and mesophyll thickness, provide a reliable basis for the assessment of the photosynthetic pathways of the investigated species as compared to the isolated characters used previously. The study indicate that C. difformis and C. haspan are C 3 species while the rest follow the C 4 photosynthetic pathway. A salient feature of this study is the identification of C. dilatatus as belonging to the C 4 group.
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