Abstract:A contribuição da anatomia foliar para a taxonomia das espécies deABSTRACT -(Contribution of leaf anatomy to the taxonomy Cyperus L. subg. Cyperus (Cyperaceae) species from Southern Brazil). The leaf anatomy of 15 taxa of Cyperus subg. Cyperus from Southern Brazil was analyzed aiming to fi nd anatomic characteristics useful for identifi cation. All the taxa studied have radiate chlorenchyma around the vascular bundles, Kranz anatomy of the Chlorocyperoid type and air cavities with starred cells in the diaphrag… Show more
“…According to Gomes et al (2005), anatomical characters of vegetative organs of Hippocrateoideae species serve as additional subsidies to the external morphology due to the questioning of results with current molecular data, which include Hippocrateaceae within the family Celastraceae (APG 2003). Similarly, other studies were performed with different families, providing contributions for taxonomy and phylogeny (Rio et al 2005, Gomes et al 2009, Hefler & Longhi-Wagner 2010, Mantovani et al 2010.…”
-(Comparative anatomy of the leaves of Piper lepturum (Kunth) C.DC. var. lepturum and Piper lepturum var. angustifolium (C.DC.) Yunck.). This study showed anatomical differences related to Piper lepturum var. lepturum and P. lepturum var. angustifolium species, sometimes considered varieties and in other cases synonyms. For histological analysis, fully expanded leaves were collected and for analysis by scanning electron microscope (SEM), fragments from the midrib were fixed on both leaf surfaces. The two species revealed differences in plant anatomy and it was observed that the stem of P. lepturum var. lepturum showed persistent wings and papillary epidermal cells, and these characters are absent in P. lepturum var. angustifolium. There was also the presence of raphides only in the lamina leaf and petiole of P. lepturum var. angustifolium, differentiating the two species. Recent studies have shown the importance of plant anatomy with species where there are issues related to taxonomic delimitation.
“…According to Gomes et al (2005), anatomical characters of vegetative organs of Hippocrateoideae species serve as additional subsidies to the external morphology due to the questioning of results with current molecular data, which include Hippocrateaceae within the family Celastraceae (APG 2003). Similarly, other studies were performed with different families, providing contributions for taxonomy and phylogeny (Rio et al 2005, Gomes et al 2009, Hefler & Longhi-Wagner 2010, Mantovani et al 2010.…”
-(Comparative anatomy of the leaves of Piper lepturum (Kunth) C.DC. var. lepturum and Piper lepturum var. angustifolium (C.DC.) Yunck.). This study showed anatomical differences related to Piper lepturum var. lepturum and P. lepturum var. angustifolium species, sometimes considered varieties and in other cases synonyms. For histological analysis, fully expanded leaves were collected and for analysis by scanning electron microscope (SEM), fragments from the midrib were fixed on both leaf surfaces. The two species revealed differences in plant anatomy and it was observed that the stem of P. lepturum var. lepturum showed persistent wings and papillary epidermal cells, and these characters are absent in P. lepturum var. angustifolium. There was also the presence of raphides only in the lamina leaf and petiole of P. lepturum var. angustifolium, differentiating the two species. Recent studies have shown the importance of plant anatomy with species where there are issues related to taxonomic delimitation.
“…Cyperus have been described and termed hypodermis (Hefler and Longhi-Wagner, 2010;Metcalfe, 1971). Cyperus ligularis studied here is included in Cyperus subg.…”
“…The images were captured using a SEM (Jeol JSM 7001S) under 15 KV at the Electronic Microscope Laboratory of the University of Brasília. The descriptive terminology followed Ellis [ 56 ], Haines & Lye [ 19 ], Hefler & Longhi-Wagner [ 57 ], and Shalabi & Gazer [ 58 ].…”
Cyperus prophyllatus, an endangered new species of Cyperus (Cyperaceae) from an aquatic ecosystem of the Atlantic Forest, Espírito Santo State, southeastern Brazil, is described and illustrated. The spikelet morphology of Cyperus prophyllatus is unique among the c. 950 species of Cyperus in having both a conspicuous spikelet prophyll and a corky rachilla articulation, which remain persistent at the base of the spikelet after disarticulation. Our molecular phylogenetic data support the placement of C. prophyllatus in the C3 Cyperus Grade and more precisely in the clade representing Cyperus sect. Oxycaryum, which also includes C. blepharoleptos and C. gardneri. Anatomical and (micro)morphological analyses corroborate the phylogenetic results, provide a better understanding of ecology and taxonomy, as well as reveal compatibility of structures with survival and dispersion in aquatic environments. A distribution map, table with distinctive characters of allied species, and conservation status are made available.
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