Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)

Mouga, None Denise M. D. S.; Schroeder, Gabriel R.; Vieira, Nilton Paulo; Dec, Enderlei

doi:10.21726/abc.v6i1.732

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…Traditionally, pollen has provided valuable and significant characters in plant taxonomy (Larson and Skvarla 1962; Nowicke and Skvarla 1979; Ferguson 1985), and in particular for Cactaceae, pollen characters continue to be useful taxonomically (e.g. Anderson and Skillman 1984; Rose and Barthlott 1994; Halbritter et al 1997; Aguilar-García et al 2012; Gonzaga et al 2019; Mouga et al 2019). Furthermore, pollen attributes have been used as a tool to clarify the taxonomy of diverse and complex angiosperm groups such as Poaceae (Dórea et al 2017), and of difficult genera such as Rosa or Psidium (Wrońska-Pilarek and Jagodziński 2011; Tuler et al 2017).…”

Section: Introductionmentioning

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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Section: Introductionmentioning

confidence: 99%

Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Ruiz-Domínguez

Vovides

Sosa

2019

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Pollen morphological investigations of family Cactaceae and its taxonomic implication by light microscopy and scanning electron microscopy

Majeed

Zafar

Ahmad

et al. 2020

Microscopy Res & Technique

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The family Cactaceae is the diversified group of angiosperm plants whose pollen statistics has been used for taxonomic identification. In this article, we present the pollen morphology of eight species belong to seven taxonomically complex genera of Cactaceae including Astrophytum, Cylindropuntia, Echinocereus, Echinopsis, Mammillaria, Opuntia, and Thelocactus using light and scanning electron microscopy. The pollen grains were acetolyzed, measured, described, and electron photomicrographs were taken. Cactaceae can be characterized by presenting different palynomorphological features including pollen type, sculpturing, polar and equatorial diameter, aperture orientation, exine thickness, P/E ratio, and echini features. Four types of pollen shapes, that is, prolate spheroidal (three species), subprolate (two species), prolate (two species), and oblate spheroidal in Echinocereus reichenbachii were observed. The polar and equatorial diameter observed maximum in O. ficus indica 116.95 and 112.27 μm while minimum in M. compressa 38.42 and 21.05 μm. Pollen of two types, tricolpate in members of subfamily Cactioideae and pantoporate in the Opuntioideae were examined. The fertility percentage has been observed maximum in Opuntia macrocentra (83.84%) and minimum in Opuntia ficus‐indica (57.89%). Exine sculpturing showing great variations such as granulate, reticulate, granulate perforate and micro‐echinate foveolate ornamentation was examined only in Echinopsis eyriesii. A key to species, based on pollen micromorphological attributes, has been constructed for correct identification of complex cactus species.

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Pollen characterization of ornamental species of Mammillaria Haw. (Cactaceae/Cactoideae)

Cited by 2 publications

References 9 publications

Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Systematic relevance of pollen morphology in tribe Hylocereeae (Cactaceae)

Pollen morphological investigations of family Cactaceae and its taxonomic implication by light microscopy and scanning electron microscopy

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