Taxonomic revision of Mcvaughia W.R.Anderson (Malpighiaceae): notes on vegetative and reproductive anatomy and the description of a new species

Almeida, Rafael Felipe de; Guesdon, Isabel Reis; Pace, Marcelo R.; Meira, Renata Maria Strozi Alves

doi:10.3897/phytokeys.117.32207

Cited by 14 publications

(11 citation statements)

References 36 publications

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“…Although the secretion of the bracteole glands was not tested, due to their placement and similar morphoanatomy, the glands on the bracts, bracteole and sepals of Acridocarpus were all recognized as nectaries. The morphoanatomical characters recorded in the glands of Acridocarpus species analyzed have been commonly reported in nectaries of Malpighiaceae species, such as a palisade-like epidermis, with epidermal cells well juxtaposed, subcuticular space storing secretion, and idioblasts containing phenolic compounds or druse-type crystals [45, 47, 51–54].…”

Section: Discussionmentioning

confidence: 99%

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Functional role and evolutionary contributions of floral gland morphoanatomy in the Paleotropical genus Acridocarpus (Malpighiaceae)

2019

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The stereotyped floral morphology of Neotropical Malpighiaceae species—zygomorphic and calyx with oil glands—is correlated with oil-bee pollination. In contrast, the floral trends of the Paleotropical lineages are actinomorphy and lack of calyx glands, probably due to the absence of oil-collecting bees. The Paleotropical genus Acridocarpus is an exception because of its zygomorphic, gland-bearing flowers. Glands throughout Acridocarpus inflorescences were morphoanatomically evaluated to verify the occurrence of patterns related to species and geographic distribution. Herbarium (25 species) and fresh samples of A. longifolius were processed according to standard anatomical techniques. To verify the presence of glucose and protein, strip tests were applied to the exudate. Fresh samples were fixed and submitted to histochemical tests. Based on the occurrence, number and placement of glands, three distribution patterns were recognized on the bracteole and ten on the calyx. Bract, bracteole and sepal glands have a typical nectary structure with a palisade-like epidermis and vascularized parenchyma. Glands were classified as short-stalked, sessile or immersed. Histochemical tests performed on bract and sepal glands of A. longifolius were positive for proteins, polysaccharides and phenolic compounds, and negative for oil compounds. Glucose and protein were detected in the exudate. These results allow us to recognize the glands in Acridocarpus inflorescences as nectaries. This comprehensive morphoanatomical study helps to clarify the correlation between patterns of floral morphology and secretion consumers, as well as to better understand floral evolution in Malpighiaceae across their dispersal events.

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Section: Discussionmentioning

confidence: 99%

“…perrieri . In Malpighiaceae, stalked nectaries have been recorded on the leaf and bracteole of Neotropical species [45, 51, 52] belonging to Banisteriopis C.B.Rob., Lophanthera Adr. Juss., and Mcvaughia W.R.Anderson [14, 45, 52]; while long stalked elaiophores were morphoanatomically described only in Dinemandra ericoides A.…”

Section: Discussionmentioning

confidence: 99%

Functional role and evolutionary contributions of floral gland morphoanatomy in the Paleotropical genus Acridocarpus (Malpighiaceae)

2019

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“…The presence of medullary phloem in the midrib is another distinctive character for Byrsonima and it has been used to differentiate genera and species in Malpighiaceae (Araújo et al 2010;Silva 2014). The vascular system conformation in the midrib has also been regarded as an important feature by several authors due to the variation or constancy within species, representing a great phylogenetic signal in the genus (Araújo et al 2010;Almeida et al 2019;Mello et al 2019;Araújo et al 2020).…”

Section: Discussionmentioning

confidence: 99%

“…It provides additional informative features which helps to understand its morphological evolution (Metcalfe & Chalk 1979;Endress et al 2000). Leaf anatomy is widely used as an aid in flowering plants taxonomy, especially in groups with taxonomic problems, as in Malpighiaceae (Metcalfe & Chalk 1957;Gomes et al 2009;Araújo et al 2010;Almeida-Jr et al 2013;Almeida et al 2017;Guesdon et al 2018;Almeida et al 2019;Araújo et al 2020). Even though leaf anatomy of Byrsonima species has been explored in previous studies, few have listed features that can be attributed to a new classification system for the genus (Araújo et al 2010;Silva 2014).…”

Section: Introductionmentioning

confidence: 99%

The taxonomic value of leaf anatomy for species Byrsonima: a difficult genus of Malpighiaceae Juss.

et al. 2020

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We studied the leaf anatomy of 15 species of Byrsonima and a single species of Diacidia as an outgroup to test the relevance of leaf anatomical characters to the complicated taxonomy of this genus. We present complete anatomical descriptions for petioles and leaf blades, together with an anatomical matrix, dendrogram and an identification key for the studied taxa. The most informative characters were the presence of stomatal crest, trichome type, epidermis type, contour and conformation of the vascular system in the diaphragm and medium petiole and number of accessory bundles. The aforementioned characters revealed that the anatomy of the petioles in the genus differs from that of petioles in the outgroup taxon with regard to vascular system conformation and the absence of cortical sclereids. Furthermore, the anatomy of the leaf blade appears to be quite informative in Byrsonima, especially in synonymized species. The anatomical features evaluated here have great value for Byrsonima taxonomy. These features may be used in an evolutionary approach to the group, especially for proposing a new classification system based on morphoanatomical characters of the genus.

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“…ex Kunth, Camarea A.St.-Hil, Heteropterys Kunt and Stigmaphyllon A.Juss. (Mamede, 1987;Araújo et al, 2010;Almeida et al, 2017;Almeida et al, 2019;Mello et al, 2019;Araújo et al, 2020;Santos et al, 2020;Matos & Araújo, 2021). Thus, the present work aims to carry out an anatomical description of the leaves of Barnebya species, seeking anatomical and micromorphological characters capable of identifying the species studied, improving the taxonomy and systematics of the genus.…”

Section: Introductionmentioning

confidence: 99%

Anatomia foliar de Barnebya (Malpighiaceae), um gênero endêmico do Brasil

Matos¹,

Silva²,

Araújo³

2022

RSD

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O estudo apresenta a descrição anatômica foliar de Barnebya, um gênero endêmico do Brasil com apenas duas espécies. O objetivo deste trabalho foi descrever a anatomia foliar e identificar características diagnosticas para a taxonomia e sistemática deste gênero. Folhas herborizadas das espécies B. dispar (Griseb.) WR Anderson & B. Gates e B. harleyi WR Anderson & B. Gates foram reidratadas e processadas de acordo com os métodos anatômicos usuais para análise em microscopia de luz. Os caracteres anatômicos foliares diagnósticos são: a presença e o número de feixes acessórios no pecíolo, conformação do feixe vascular da nervura central, presença de tricomas, presença de ornamentação na parede externa de células epidérmicas na face abaxial do limbo foliar e os tipos de monocristais. Os resultados obtidos no presente estudo mostraram e ressaltam que caracteres anatômicos relacionados a pecíolos são importantes na caracterização de gêneros e caracteres relacionados a lâminas foliares são importantes na caracterização de espécies em Malpighiaceae, corroborando estudos anteriores e realizando pela primeira vez a descrição anatômica foliar de Barnebya.

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Taxonomic revision of Mcvaughia W.R.Anderson (Malpighiaceae): notes on vegetative and reproductive anatomy and the description of a new species

Cited by 14 publications

References 36 publications

Functional role and evolutionary contributions of floral gland morphoanatomy in the Paleotropical genus Acridocarpus (Malpighiaceae)

Functional role and evolutionary contributions of floral gland morphoanatomy in the Paleotropical genus Acridocarpus (Malpighiaceae)

The taxonomic value of leaf anatomy for species Byrsonima: a difficult genus of Malpighiaceae Juss.

Anatomia foliar de Barnebya (Malpighiaceae), um gênero endêmico do Brasil

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