Comparative leaf anatomy and morphology of some Brazilian species of Crotalaria L. (Leguminosae: Papilionoideae: Crotalarieae)

Abstract

Anatomical characters often provide strong taxonomic evidence and many times help define species whose morphological limits are in question. This study aimed to survey characters of the leaf anatomy of 16 species of Crotalaria L. occurring mostly in the cerrado (savanna) of central Brazil and in areas of restinga (coastal woodland, or sandy forest) along the coast of the country, in order to improve the current taxonomic circumscription of sections and species. Leaf samples were collected in the field and obtained from herbarium specimens. Standard techniques in plant anatomy were employed, including analyses under light and scanning electron microscopy. Many of the characters analyzed are relatively uniform, but some are diagnostic for species. At the section level, only trichomes with a base composed of radially distributed cells proved useful in the diagnosis of C. sect. Calycinae. The other characters analyzed showed interspecific variation, but no diagnostic value for recognition of the sections. At the species level, unlike the results found for sections, various characters have diagnostic value. Among the characters with diagnostic value at the species level, those related to texture, the venation pattern (such as the formation of areolas and insertion of the ribs secondary to midrib), and, in particular, the epidermis, showed potential for aiding the circumscription of some species.

Aspectos morfoanatômicos de Senegalia angico (Mart.) Seigler & Ebinger. (Leguminosae): uma abordagem taxonômica

“…Quanto à presença de tricomas, S. angico apresentou tricomas tectores unisseriados e tricomas glandulares capitados. Teixeira & Gabrielli (2006) relataram que a morfologia dos tricomas tem grande apelo taxonômico para Leguminosae. Entretanto os tricomas tectores unisseriados são vastamente difundidos em Senegalia e Acacia Mill., e o número de células pode variar de acordo com o estágio de desenvolvimento da folha, o que limita sua utilização na segregação de táxons do "Complexo Tenuifolia", por não se tratar de uma característica constante (BOUGHTON, 1989;TEIXEIRA & GABRIELLI, 2006).…”

“…Teixeira & Gabrielli (2006) relataram que a morfologia dos tricomas tem grande apelo taxonômico para Leguminosae. Entretanto os tricomas tectores unisseriados são vastamente difundidos em Senegalia e Acacia Mill., e o número de células pode variar de acordo com o estágio de desenvolvimento da folha, o que limita sua utilização na segregação de táxons do "Complexo Tenuifolia", por não se tratar de uma característica constante (BOUGHTON, 1989;TEIXEIRA & GABRIELLI, 2006). Os tricomas glandulares capitados são vastamente difundidos nas linhagens de Senegalia da América do Sul (VASSAL, 1970;ROBBERTSE, 1975), mas a localização específica na folha pode auxiliar na identificação do táxon (BOUGHTON, 1989).…”

Struktur Anatomi Daun Sebagai Bukti Dalam Pembatasan Takson Tumbuhan Berbunga: Studi Kasus 12 Suku Tumbuhan Berbunga Indonesia

“…Pengamatan secara transversal menunjukkan bahwa semua jenis yang diamati memiliki epidermis atas dan epidermis bawah daun yang terdiri atas satu lapis sel (uniseriate). Beberapa penelitian juga menunjukkan bahwa jumlah lapisan epidermis dapat digunakan sebagai ciri taksonomi pada tingkat marga (Devecchi et al 2014;Lin & Tan 2015;Akinsulire et al 2018), sedangkan epidermis ganda (multiple epidermis) ditemukan pada Rhizoporaceae (Stace 1965) dan Pandanaceae (Rahayu et al 2011).…”

Light and scanning electron microscopic characterization of thirty endemic Fabaceae species of district Lahore, Pakistan

“…To resolve these identification issues a number of national and international researchers employed multiple taxonomic approaches. Nevertheless l leaf epidermal anatomy is considered the most promising tool for the identification and systematic classification of the Fabaceae taxa (Devecchi, Pirani, & Melo‐de‐Pinna, 2014). Cildir, Kahraman, Dogan, and Buyukkartal (2017) analyzed the leaf anatomical and micro morphological characters of some species of Lathyrus by using light (LM) and scanning electron microscopy (SEM).…”