Morfologia de plântulas de Martiodendron excelsum e sua relevância sistemática em Dialiinae (Leguminosae, "Caesalpinioideae”)

Abstract

ResumoMartiodendron Gleason é um gênero sul-americano com cinco espécies arbóreas, subordinado à Dialiinae (tribo Cassieae). Dialiinae apresenta 17 gêneros, que formam um clado cujas relações genéricas permanecem em grande parte não definidas. Este trabalho descreve e ilustra o desenvolvimento e a morfologia de plântulas de Martiodendron excelsum e avalia, por meio de uma revisão, a relevância sistemática dos atributos de plântulas em nível de gênero em Dialiinae. Sementes de M. excelsum foram coletadas de populações em áreas de mata ciliar no Estado de Roraima, Brasil. Martiodendron excelsum tem plântulas fanero-epígeo-armazenadoras, eofilos estipulados e 1-foliolados nos três primeiros nós. Os dados sobre morfologia de plântulas são potencialmente úteis para diagnosticar gêneros em Dialiinae, visto que Martiodendron e todos os demais gêneros podem ser distintos entre si pela a variação no grupo morfológico de plântulas, na filotaxia e número de folíolos no primeiro e segundo eofilos, nas relações entre o comprimento e largura dos cotilédones e entre o comprimento do hipocótilo e epicótilo e no alongamento do primeiro entrenó eofilar. Por fim, em Leguminosae, a predominância de eofilos 1-foliolados na maior parte dos gêneros de Dialiinae é somente comparável à encontrada entre as plântulas de táxons de Papilionoideae. Palavras-chave: Cassieae, desenvolvimento pós-seminal, Roraima, taxonomia. AbstractMartiodendron Gleason is a South American genus with five species of trees, belonging to the tribe Cassieae, subtribe Dialiinae (Leguminosae, "Caesalpinioideae"). Dialiinae has 17 genera that form a clade whose generic relationships are not highly resolved. This paper describes and illustrates the early development and seedling morphology of Martiodendron excelsum. We review the current state of knowledge of seedling morphology in Dialiinae, in order to evaluate its systematic relevance at a generic level. Seeds of M. excelsum were collected from wild populations in Roraima State, Brazil. Martiodendron excelsum has phanerocotylar, epigeal seedlings with storage cotyledons, with stipulate and 1-foliolate eophylls at the first three nodes. Seedling morphology data are potentially useful for diagnosing genera in Dialiinae. Martiodendron and all other remaining genera can be distinguished from each other by the variation in seedling morphological groups, as well as lengthwidth ratio of cotyledons, phyllotaxis and leaflet number of the first and second eophylls, ratio of hypocotyl length to epicotyl length, and elongation of the first eophyllar internode. In addition, within Leguminosae, the predominance of 1-foliolate eophylls in most genera of Dialiinae is only comparable among seedlings of Papilionoideae taxa.

New Information of the Anatomy and Phytochemical Screening of Pentaclethra macroloba (Willd.) Kuntze (Caesalpinioideae-Leguminosae) Seeds

“…Pracaxi oil also has insecticidal potential against Aedes (Stegomyia) aegypti (L.) larvae, a vector of dengue fever, urban yellow fever, chikungunya, and zika virus [16,17]. Anatomical and histochemical studies make it possible to determine the nature of chemical substances stored in secretory structures, such as idioblasts, isolated, hypertrophied cells larger than neighboring cells, in addition to cavities, secretory channels, and glandular trichomes, as well as to determine reserve compounds and secondary metabolite [18][19][20][21].…”

Morphological aspects and anatomy of the fruit, seeds and seedlings of Pentaclethra macroloba (willd.) Kuntze (Fabaceae)

“…Thus, studies on the morphological and anatomical aspects of the fruit, seeds and seedlings of tropical forests constitute a useful tool in species identification, serving as a basis for other studies in the branches of forest sciences, as mentioned by Sánchez-Coronado et al (2007) and Ribeiro et al (2015). In this context, some studies have already been developed with forest species of the Fabaceae family regarding morphoanatomy of the fruit, seed and seedling (Sousa et al, 2010;Hartmann and Rodrigues, 2014;Ribeiro et al, 2015).…”

Morphological aspects of fruits, seeds, and seedlings, and anatomy of seedlings of apuleia molaris spruce ex benth

“…Since the 1980s, representatives of the family have been subjected to morphological descriptions of their fruits, seeds, and seedlings by Melo and Varela (2006), Matheus and Lopes (2007), Amorim et al (2008), Silva et al (2008), Ramos and Ferraz (2008), Lopes and Matheus (2008), Félix-da-Silva et al (2009), Nogueira et al (2010, Battilani et al (2011), Rego et al (2011, Barreto and Ferreira (2011), Rodrigues et al (2012, Abreu et al (2012), Gurgel et al (2012Gurgel et al ( , 2014, Alves et al (2013), Rodrigues (2013), Braga et al (2013), Feitosa (2014, Hartmann and Rodrigues (2014), Lobo et al (2014), Oliveira (2014), Ribeiro et al (2015), Ferreira and Barreto (2015) and Silva et al (2015), with the aim of contributing to the scientific knowledge of Brazilian flora.…”