Foliar and petiole anatomy of Pterygota (Sterculioideae; Malvaceae) species and their distribution in Nigeria

Abstract

Se estudió la anatomía foliar y del peciolo de especies de Pterygota de Nigeria, proveyendo información sobre su distribución en el área. Principalmente están distribuidas por el sur de Nigeria, especialmente en zonas más húmedas. Los microcaracteres foliares muestran que las especies son hiposteomátcas y generalmente paracíticas, más abundantes en P. berquaertii, con un promedio de 115/mm 2 , que en P. macrocarpa, con 59/mm². Las células epidér-micas son irregulares, rectangulares y poligonales. El peciolo esfé-rico con epidermis uniseriada; la distribución celular varia desde solitarias a radiales múltiples. Este estudio ha proporcionado importante información sobre las especies indígenas. Son necesarios estudios posteriores para comprender grado y tiempo de evolución independiente de las especies en Nigeria.Palabras clave: Pterygota, Taxonomía, Foliar, Peciolo, Micromorfología, Conservación. AbstractLeaf and petiole anatomy of Pterygota species in Nigeria were studied and their distribution within the area is also reported, following outlined standard protocols. They are chiefly distributed in Southern Nigeria especially in wetter areas. Foliar micro-characters showed that the species are hypostomatic and generally paracytic, more abundant in P. berquaertii, with an average of 115/mm 2 , than in P. macrocarpa, where it is 59/mm 2 . Epidermal cells are irregular, rectangular and polygonal. Petiole spherical with uniseriate epidermis; cell distribution ranging from solitary to radial multiples. This study has provided valuable information about these indigenous species. Further systematic studies are vital to understand the number and timing of independent evolution of the species into Nigeria.

Comparative vegetative anatomy of three Elaeocarpus species from the Western Ghats, Southern India

“…The presence of parenchymatous cortex containing prismatic crystals, sclerenchymatous fibers covering the vascular tissues occurring in the petioles of Elaeocarpus species is similar to those reported in some of the dicot plants (Chukwuma et al, 2017; Duarte et al, 2013; Ingle & Kothale, 2018; Orozco & Coba, 2001). The presence of prismatic crystals in the species of Elaeocarpus could protect the plant from herbivorous and are connected with irritating chemical (Rupali et al, 2012).…”

“…and E. serratus resembles the shape of vascular tissues in E. angustifolius , E. tuberculatus and E. variabilis (Metcalfe & Chalk, 1950). Layers of thin‐walled parenchyma cells constituting the pith of all the examined Eleaocarpus species resemble the petiole of Pterygota species of the plant family Malvaceae (Chukwuma et al, 2017). The absence of water‐storage cells in the cortical region of the petiole clearly differentiates E. angustifolius from E. tuberculatus and E. variabilis .…”

Microscopic characterization of petiole anatomy of Asteraceous taxa of Western Himalaya‐Pakistan

“…A light microscope (LM) was used to distinguish the species based on the shape and vascular bundle (Marasek‐Ciolakowska, Soika, Warabieda, Kowalska, & Rybczyński, 2021). Earlier studies are conducted on petiole anatomy of the Asteraceous taxa, all representing the significance of petiole anatomy which help in the classification of the family (Chukwuma, Soyewo, Okanlawon, & Ugbogu, 2017; Kahraman, Celep, & Dogan, 2010; Kocsis & Borhidi, 2003; Ozbek, Mavi Idman, & Bani, 2014; Sacramento Silva, Leite, & Roque, 2019). The petiole anatomy is a tool for describing the genera and species of the Asteraceae families (Suresh, Singh, Vasavi, Ihsanullah, & Mary, 2011).…”

Micro-morphological characters in Polypodiaceae and its taxonomic significance

“…However, over the years numerous species of angiosperms have been identified, described and delineated, generating phylogenetic relationships using leaf architecture Cervantes et al 2009;Pacheco-Trejo et al 2009;Sarala and Vijay 2014;Sharma et al 2016;Fayed et al 2020). Foliar micro-morphological traits like epidermal cell size, stomatal features, and laminar indument have great taxonomic implications in distinguishing species (Baronova 1992;Chukwuma et al 2017;Chukwuma et al 2022).…”