Characteristics of the exine and aperture of pollen grains of <i>Eriosema</i> and <i>Rhynchosia</i> (Leguminosae – Papilionoideae – Phaseoleae)

Oliveira, Ana Carla da Silva; Borges, Ricardo Landim Bormann de; Perez, Ana Paula Fortuna; Lewis, Gwilym P.; Silva, Juliana Santos

doi:10.1080/00173134.2019.1600576

Cited by 5 publications

(4 citation statements)

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“…The polar area was found as large (Plate 1g–i). However, Buril et al (2011) showed that the pollen of R. minima is reticulate with various shapes and sizes of lumina while Oliveira et al (2019), determined the micro-reticulate exine pattern and the lumina are filled with rugulae and granules. Our study also confirmed those findings, although we found homobrochate reticulate exine.…”

Section: Resultsmentioning

confidence: 99%

“…Hence, these features can easily delimit both taxa. Similarly, Oliveira et al (2019), documented the pollen morphology of closely related genera, Rhynchosia and Eriosema and delimited both these genera based on the exine sculpturing, polarity, lumina and muri. Our findings for Rhynchosia minima also explored the mega reticulate and homobrochate exine pattern.…”

Section: Implications Of the Palynotaxonomy For The Systematic Of Pap...mentioning

confidence: 99%

“…The tribe Desmodieae genus Desmodium is polyphyletic and has been reclassified to monophyletic genera based on the palynological, morphological, molecular and phylogenetic analysis (Ohashi et al 2018; Hiroyoshi and Kazuaki 2019). The exine sculpturing and colpus pattern are observed under the scanning electron microscope (SEM) to circumscribe the genus Rhynchosia from Eriosema (Oliveira et al 2019). The palynological study of Crotalaria is investigated but very little variation was found in pollen morphology and hence recommended that pollen traits are poor criteria for the identification of species within the taxonomically complex genus (Lin and Huang 1999).…”

Section: Introductionmentioning

confidence: 99%

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Exploration of pollen traits and their taxonomic relevance in selected taxa of the subfamily Papilionoideae from Hainan Island, China

et al. 2022

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The Papilionoideae is one taxonomically complex subfamily with high economic and medicinal potential. The pollen micro-morphology and taxonomic relevance of this subfamily are still poorly known in the island. Therefore, this study aims to provide new palynological information to correctly identify and define species boundaries within the subfamily. The species were collected from different geographical regions of Hainan Island. Both light and scanning electron microscopic techniques were used to observe pollen traits. Additionally, principal component analysis was performed to elucidate the variation among the taxa. A significant variation was found in exine sculpturing i.e. most of the taxa have reticulate type pollen while Desmodium triflorum has a psilate exine pattern. Variations were found on the surface of the reticula that can help to delimit the species from one another. Pollen type was observed as tricolporate and rarely tricolpate. Similarly, the colpus surface membrane morphology may also vary significantly from species to species i.e. scabrate, verrucate, gemmate, rugulate patterns. Besides, the mergo having various sculpturing found in Canavalia rosea, Desmodium triflorum, D. microphyllum Glycine max, Macroptilium atropurpureum, Erythrina crista-galli and Zornia gibbosa should be considered as a potential taxonomic trait for the subfamily. The maximum P/E ratio was found in Zornia gibbosa (2.24). Similarly, the maximum pollen size was found in Alysicarpus vaginalis (34.64 × 33.99 µm). Our study explored the pollen morphological traits and can be helpful to correctly identify the species and define species boundaries within Papilionoideae at various taxonomic levels. This study strengthens and supports the taxonomic position of the subfamily and will provide bases for further phylogenetic and molecular studies of Papilionoideae.HIGHLIGHTSVarious taxa of the subfamily Papilionoideae were collected from different geographical regions of Hainan Island, South China.Both light and scanning electron microscopic techniques were used to analyze the ultra-sculpturing of the pollen.Most of the taxa have reticulate exine patterns but variations were found in supra-tectal elements and colpus surface membrane morphology.These variations in pollen traits have significant taxonomic potential and will strengthen the taxonomy of Papilionoideae.This study can help to correctly identify and define species boundaries at various taxonomic levels of the Papilionoideae and will solve the taxonomic problem.

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Section: Resultsmentioning

confidence: 99%

Section: Implications Of the Palynotaxonomy For The Systematic Of Pap...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Exploration of pollen traits and their taxonomic relevance in selected taxa of the subfamily Papilionoideae from Hainan Island, China

et al. 2022

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“…Pollen morphology is widely used to clarify taxonomic issues among angiosperms (e.g. Christensen 1986; Carrijo et al 2013; Silva-Fourny et al 2018; Oliveira et al 2019; Ragho 2020; Araújo et al 2021; Souza-Souza et al 2022) and has proven informative for delimiting species of Psidium L. (Tuler et al 2017), another genus of Pimentinae within Myrtaceae. However, few species of Campomanesia have had their pollen grain morphology described in the literature (Barth and Barbosa 1972; Thornhill et al 2012d; Corrêa et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Pollen morphology: a source of information for taxonomic studies within Campomanesia (Myrtaceae)

et al. 2022

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Campomanesia is a well-delimited Neotropical genus of Myrtaceae, but some of its species have a poorly understood circumscription. Pollen morphology can provide characters to clarify the relationships among such taxa. Here, we analyze the pollen grains of 16 species of Campomanesia using light and scanning electron microscopy. Heat map and multivariate regression tree analyses were performed aiming to detect differences among species based on pollen morphology. Pollen grains of the studied taxa are isopolar monads that are oblate or, less often, suboblate, 3(4)-colporate, syncolporate or parasyncolporate, with a triangular or quandrangular amb. The exine ornamentation varies among rugulate-granulate, granulate, rugulate and rugulate-espiculate. Fastigium is present in 14 species, and a costa is present in three species. The heat map and regression tree analyses based on 16 character states of pollen morphology were able to distinguish all species of Campomanesia studied here. Some species differ from all the other species, such as Campomanesia guaviroba due to its exclusively rugulate exine. Amb, shape and exine ornamentation were distinctive characters, as previously reported for other genera of Myrtaceae. However, the presence of fastigium also proved to be an informative pollen character for species distinction in Campomanesia. Based on the sample of this study, we can state that Campomanesia is a eurypalynous genus within Myrtaceae.

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A palynological atlas of the Cerrado-Caatinga ecotone in northeastern Brazil

Silva,

Araújo,

Ledru

2024

Review of Palaeobotany and Palynology

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Characteristics of the exine and aperture of pollen grains of Eriosema and Rhynchosia (Leguminosae – Papilionoideae – Phaseoleae)

Cited by 5 publications

References 15 publications

Exploration of pollen traits and their taxonomic relevance in selected taxa of the subfamily Papilionoideae from Hainan Island, China

Exploration of pollen traits and their taxonomic relevance in selected taxa of the subfamily Papilionoideae from Hainan Island, China

Pollen morphology: a source of information for taxonomic studies within Campomanesia (Myrtaceae)

A palynological atlas of the Cerrado-Caatinga ecotone in northeastern Brazil

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