Original Research

Pollen morphology of Prototulbaghia Vosa: A comparative palynological study of the Southern African Alliaceae.

Melissa Andriessen, Madeleen Struwig, Stefan J. Siebert
Suid-Afrikaanse Tydskrif vir Natuurwetenskap en Tegnologie | Vol 32, No 1 | a389 | DOI: https://doi.org/10.4102/satnt.v32i1.389 | © 2013 Melissa Andriessen, Madeleen Struwig, Stefan J. Siebert | This work is licensed under CC Attribution 4.0
Submitted: 29 October 2012 | Published: 14 May 2013

About the author(s)

Melissa Andriessen, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
Madeleen Struwig, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
Stefan J. Siebert, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa


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Abstract

The  Southern  African  Alliaceae  Borkh.  is  represented  by  four genera (Allium L., Nothoscordum Kunth, Tulbaghia L. and Prototulbaghia Vosa) and 28 species. The  pollen  morphology  of  the  endangered  monotypic  genus Prototulbaghia has  not  been described  before.  A  comparative  study  of  the  pollen  morphology  of Prototulbaghia  siebertii Vosa, Nothoscordum  borbonicum Kunth, Tulbaghia  simmleri P.Beauv.  and T.  violaceae Harv.  is presented in this article. Scanning electron microscopy, as well as light microscopy, were used to examine the pollen. The pollen morphology of the species can be described as perprolate and monosulcate, and the surface sculpture as reticulate and heterobrochate. However, the pollen of Prototulbaghia siebertii displays a unique characteristic as the grains are folded in their breadth with the tips touching, hence causing the grain to display a triangular and disulcate appearance. It might be possible to ascribe this fold to the process of harmomegathy or a still unknown event that occurs during the development of the pollen grain. This phenomenon should be further investigated to determine the cause of folding and whether it is a unique taxonomic  characteristic  of  this  genus,  and  if  it  could  be  of  evolutionary  significance  for the Alliaceae.

Keywords

Alliaceae; harmomegathy; monosulcate; pollen morphology; perprolate; Prototulbaghia siebertii; reticulate; scanning electron microscope; Southern Africa; folding

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Crossref Citations

1. Pollen morphology and folding of Prototulbaghia Vosa (Amaryllidaceae), South Africa
Madeleen Struwig, Stefan John Siebert, Melissa Andriessen, Anine Jordaan
Botany Letters  vol: 163  issue: 1  first page: 41  year: 2016  
doi: 10.1080/12538078.2015.1127771