Pollen morphology and its systematic value to southern South American species of Lepidaploa (Vernonieae: Asteraceae)

Marques, Danilo; Pico, Gisela Mariel Via Do; Nakajima, Jimi Naoki; Dematteis, Massimiliano

doi:10.1590/2175-7860202172017

Cited by 4 publications

(2 citation statements)

References 28 publications

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“…Numerous palynological studies have been conducted on Asteraceae (Gonçalves-Esteves 1976, 1977a, 1977b; Gonçalves-Esteves and Esteves 1986, 1988a, 1989a, 1989b; Mendonça et al 2002; Cancelli et al 2005, 2010; Magenta et al 2010; Moreira et al 2019; Reshmi and Rajalakshmi 2019; Ulukuş and Tugay 2020; Marques et al 2021; Souza-Souza et al 2021, 2022; Tellería et al 2023). However, there are no specific papers describing the palynology of the tribe Neurolaeneae, only studies focused on Asteraceae that evaluated the pollen of some Neurolaeneae species: Calea species (e.g.…”

Section: Introductionmentioning

confidence: 99%

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Cartaxo-Pinto,

Vieira,

Nascimento

et al. 2023

Palynology

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Calea comprises 157 species that occur in the Neotropics. The genus is organized into eight subgenera and 18 sections. Calea sect. Meyeria consists of eight species occurring exclusively in south-central Brazil. In this study, pollen grains from these eight species were sampled from herborized flower buds in pre-anthesis. Pollen samples were acetolyzed, measured, and photographed under a light microscope. Unacetolyzed pollen grains were examined under a scanning electron microscope. The results were used to characterize pollen morphology and construct a palynotaxonomic key for Calea sect. Meyeria. The analyzed pollen grains were monads, isopolar, usually medium-sized, oblate spheroidal, tricolporate, with lalongate endoaperture, the sexine echinate and thicker than the nexine, and six spines in the apocolpium region. The eight species have very similar pollen grains, but some characters are informative for this section, namely pollen size, polar area, sexine ornamentation, and endoaperture characteristics. Despite the similarity of the pollen grains, palynological analysis was able to contribute to the delimitation of Calea species, providing new information for species distinction within Calea sect. Meyeria.

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Section: Introductionmentioning

confidence: 99%

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Cartaxo-Pinto,

Vieira,

Nascimento

et al. 2023

Palynology

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“…Sexine thickness, the type of aperture, and spine dimensions are the differentiating traits for species of Stilpnopappus and Strophopappus (Carrijo et al 2013), as is pollen surface ornamentation in the complex Phaeostigma of the genus Ajania (Huang et al 2017). Pollen type and pollen grain shape are taxonomically useful for distinguishing species and genera of the subtribe Lepidaploinae (Marques et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Pollen morphology of the genera Hidalgoa and Dahlia (Coreopsideae, Asteraceae): implications for taxonomy

Sánchez-Chávez¹,

Vovides²,

Sosa³

2022

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Hidalgoa and Dahlia are two closely related genera in Asteraceae, tribe Coreopsideae whose limits need to be clarified. Pollen morphology has been useful for delimitation at the genus level in this family. To better define these genera, the morphology of pollen grains was observed and measured using light and scanning electron microscopy. The pollen grains of 25 species of Dahlia and Hidalgoa were acetolyzed and analyzed. Pollen is tricorporate in most of the species studied, although in a few species in Dahlia, grains were found to be hexacolporate. The most outstanding differentiating characters among species of Dahlia and Hidalgoa are colpus length (greater in Hidalgoa) and shape of spines (conical in Hidalgoa). In addition, lalongate ora are larger in Hidalgoa than in Dahlia. A PCA analysis of thirteen pollen characters, identified species of Hidalgoa in a discrete group and Dahlia cuspidata as an outlier. These distinctive attributes in pollen morphology support the idea that pollen morphology is useful for delimitation at the generic level in the Dahlia clade. Further evidence from other sources, genetic or anatomical, might contribute to demarcating Dahlia and Hidalgoa, and provide insight into the family’s evolutionary history.

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Implication of light and scanning electron microscopy for pollen morphology of selected taxa of family Asteraceae and Brassicaceae

Umber

Zafar

Ullah

et al. 2021

Microscopy Res & Technique

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The present study was intended to assess pollen morphological attributes of selected Asteraceous and Brassicaceous species from tehsil Esa Khel (Mianwali), Punjab using scanning electron microscopy (SEM) and light microscopy (LM) techniques for its systematic and taxonomic significance for correct identification. Pollen from 12 different species belongs to two plant families from various distributional localities were collected, acetolyzed and measured. Different palynomorphological features were investigated using LM and SEM techniques. In Asteraceous species, three types of pollen (tricolporate, trizonocolporate, and tetracolporate) were observed. Pollen shape was observed prolate-spheroidal in three species while oblate and oblate-spheroidal were detected in Parthenium hysterophorus and Erigeron bonariensis. While sculpturing pattern of exine were echinate, echinate fenestrate, echinate perforate and scabrate echinate. Mesocolpium measurement was calculated maximum for Sonchus oleraceous (16.6 μm). Brassicaceae pollen were circular, lobate, tricolpate and exine show reticulate peculiarities. Whereas dominant shape was oblate-spheroidal followed by prolate-spheroidal and sub-prolate in Lepidium didymum and Sisymbrium irio, respectively. Mesocolpium distance was noted highest in Raphanus raphanistrum (14.4 μm). Exine thickness was noted maximum in Erigeron bonariensis (2.9 μm) in Asteraceous species and in Brassicaceae; Lepedium didymum exine measurement was 2.7 μm. The study showed that pollen micromorphology has important role to accurately identify and classify diverse plants genera belong to different families. Based on these taxonomic palynomorph features, the accurate identification of species from flora of tehsil Esa Khel, Mianwali were elaborated.

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Pollen morphology and its systematic value to southern South American species of Lepidaploa (Vernonieae: Asteraceae)

Cited by 4 publications

References 28 publications

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Pollen morphology of the genera Hidalgoa and Dahlia (Coreopsideae, Asteraceae): implications for taxonomy

Implication of light and scanning electron microscopy for pollen morphology of selected taxa of family Asteraceae and Brassicaceae

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Pollen morphology and its systematic value to southern South American species of Lepidaploa (Vernonieae: Asteraceae)

Cited by 4 publications

References 28 publications

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

Palynotaxonomy of Calea sect. Meyeria (Asteraceae: Neurolaeneae)

﻿Pollen morphology of the genera Hidalgoa and Dahlia (Coreopsideae, Asteraceae): implications for taxonomy

Implication of light and scanning electron microscopy for pollen morphology of selected taxa of family Asteraceae and Brassicaceae

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Pollen morphology of the genera Hidalgoa and Dahlia (Coreopsideae, Asteraceae): implications for taxonomy