The systematic value of pollen morphology in Chresta Vell. ex DC. (Vernonieae, Asteraceae)

Siniscalchi, Carolina M.; Souza-Souza, Raquel Maria Batista; Loeuille, Benoît; Pirani, José Rubens; Gonçalves-Esteves, Vânia

doi:10.1016/j.revpalbo.2017.05.003

Cited by 14 publications

(9 citation statements)

References 26 publications

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“…Pollen, for example, has played an important role in Asteraceae taxonomy in recent decades, providing evidence and support for groups at various taxonomic levels (Siniscalchi, Souza-Souza, Loeuille, Pirani, & Gonçalves-Esteves, 2017). In our study pollen of Erigeron bonariensis, prolate-spheroidal shape and echinate sculpturing were examined while previous findings described spherical, scabrate- (Khan, Jan, et al, 2021;.…”

Section: Discussionmentioning

confidence: 79%

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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Section: Discussionmentioning

confidence: 79%

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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show abstract

“…Pollen study can be helping us to understand the systematic phylogenetic relationship among the various taxonomic rank of angiosperm (Joujeh et al, 2019). Pollen morphology has a significant role at various taxonomic levels of Asteraceae taxonomy which provides evidence for evolutionary study in recent decades (Siniscalchi et al, 2017). Pollen morphology for herbaceous species of Asteraceae has been considered helpful in the critical taxonomic problems associated with them.…”

Section: Discussionmentioning

confidence: 99%

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Ali

Zafar

Ahmad

et al. 2023

Microscopy Res & Technique

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Due to the diverse and rich taxa, Asteraceae needs to explore from the untouched area. In this study, the pollen study was intended to assess the taxonomic value for Asteraceous taxa growing on the Sikaram Mountain Pak‐Afghan border. Both microscopic techniques (LM and SEM) play a significant role in the identification and classification of herbaceous species of Asteraceae for their taxonomic and systematic implication. Pollen was observed and measured for the 15 species of Asteraceae. For investigated taxa 15 pollen characters with size, shape, polar view, pollen type, aperture orientation, and exine sculpturing in the eurypalynous pollen. Consequently, the pollen grains are usually Tricolporate, triangular to circular in polar view, while, the shape of pollen varies from subulate, oblate, and prolate along with prolate to spheroidal whereas, sculpturing also varies from Scabrate to micro reticulate, echino‐perforate, Scabrate to echinate, echinate to granulate and echinate were observed. Similarly, among the quantitative data minimum values of polar and equatorial were 15.8 ± 0.74 μm in Filago pyramidata and 17.85 ± 0.39 μm in Heteropappus altaicus was measured respectively, while; the length of the spine with the least value of 2.45 ± 0.31 μm in Hertia intermedia and highest with 7.55 ± 0.31 μm was observed in Cirsium wallichii. The Exine thickness is a minimum of 1.70 ± 0.35 μm in Launaea nudicaulis and a maximum of 5.65 ± 3.59 μm in Cirssium vulgare. In addition, the highest pollen fertility (87%) in Centaurea iberica while the highest pollen sterility (32%) was recorded in Cirsium verutum. Furthermore, clustering via UPGMA, PCA, and PCoA analysis was performed for the separation of closely related taxa. It is concluded from this research work that palynological study has a crucial role in taxonomic, pure, and applied sciences. This study can be further authenticated and improved by a Phylogenetic study based on chloroplast DNA analysis & whole genome sequencing.Research Highlights Pollen ultrastructure among 15 Asteraceous taxa. Micromorphological attributes measured via LM and SEM. Exine sculpture elements patterns provide accurate identification. Taxonomic keys were developed for its systematics implications.

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“…Nevertheless, current studies in other plant groups have demonstrated their utility and that of other data sources (e.g. Kriebel et al 2017; Niu et al 2018; Siniscalchi et al 2017; Wrońska-Pilarek et al 2018). The most complete study on the palynology of the entire Cactaceae by Leuenberger (1976b) was published in a series of dissertations and is difficult to acquire.…”

Section: Discussionmentioning

confidence: 99%

Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Ruiz-Domínguez

Vovides

Sosa

2019

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Hylocereeae is one of the nine tribes in the subfamily Cactoideae (Cactaceae), for which the limits and recognition of genera have been controversial. Essentially, this group comprises epiphytic and hemiepiphytic genera with stems modified as climbing structures. The aim of this paper is to examine pollen attributes in representative species of genera of Hylocereeae, focusing on Selenicereus whose current circumscription comprises Hylocereus and three Weberocereus species, to find whether significant potentially apomorphic and/or autapomorphic systematic characters can be discovered. Utilizing SEM and light microscopy, 25 pollen characters were observed and measured. Tribe Hylocereeae is stenopalynous, with pollen grains isopolar and radially symmetrical monads, mostly tricolpate, except in Kimnachia, Pseudoripsalis and Weberocereus, whose pollen grains are pantocolpate. Seven attributes (five qualitative and two continuous) exhibited useful variation and were coded. The character of brevicolpate pollen grains was shared by Kimnachia ramulosa and Pseudorhipsalis amazonica. Convex quadrangular outline in the polar view was shared by Weberocereus tunilla and S. glaber. The absence of spinules on the exine was shared by S. minutiflorus and S. stenopterus. The largest pollen grain, found in Selenicereus megalanthus, might be correlated with polyploidy. Selenicereus is the taxon with the highest variation in pollen attributes, including species with an exine with or without spinules and variable polar area index and shape (subprolate or oblate-spheroidal).

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The systematic value of pollen morphology in Chresta Vell. ex DC. (Vernonieae, Asteraceae)

Cited by 14 publications

References 26 publications

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

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

Palyno‐taxonomic approach through light and scanning electron microscopy for the identification of herbaceous Asteraceae species from Sikaram Mountain Pak‐Afghan border

Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

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