Speed and force of spore ejection in Selaginella martensii

  title={Speed and force of spore ejection in Selaginella martensii},
  author={Jakob J Schneller and Hans Gerber and Alex Zuppiger},
  journal={Botanica Helvetica},
Schneller J., Gerber H. and Zuppiger A. 2008. Speed and force of spore ejection in Selaginella martensii. Bot. Helv. 118: 13 – 20.Spores of the genus Selaginella are discharged through an ejection mechanism caused by the anatomical differentiation of the sporangium. To understand the evolution of these specialised dispersal mechanisms, it is important to know how effective they are, i.e. what distance is reached by the spores, how rapidly they are ejected, and what forces must be developed by… 

Spore dispersal of Selaginella denticulata, S. helvetica, and S. selaginoides, and the significance of heterospory in Selaginellacae

The results suggest that the active ejection of the megaspore is a means of ensuring similar dispersal distances of micro- and megaspores and thus cross-fertilization in Selaginella, and surmise that both self-fertility and outcrossing occur.

Shooting Mechanisms in Nature: A Systematic Review

This review offers insight into the working principles of shooting mechanisms in fungi, plants, and animals in the light of the specific functional demands that these mechanisms fulfill.

Ontogenia de los esporangios, formación y citoquímica de esporas en licopodios (Lycopodiaceae) colombianos

The results indicated that the ontogeny of sporangia and sporogenesis were very similar to the previously observed in Huperzia brevifolia, suggesting that they represent conservative family traits, nonspecific or generic.

Dispersal and colonization in heterosporous lycophytes: palynological and biogeographical notes on the genus Isoetes in the Mediterranean region

It is suggested that in this species – as in other terrestrial Isoetes species – animals could have a fundamental role in dispersal and dispersion, and synaptospory could be an important mechanism in disperseal events; in addition, polyploidy can be anImportant selective advantage for colonization events also in this group of vascular plants.

Fern and lycophyte diversity in the Pacific Northwest: Patterns and predictors

Evidence is found for the influence of past glaciations and glacial refugia on the patterns of pteridophyte diversity, that moisture availability and cold temperatures are strongly correlated with patterns of genus richness, phylogenetic diversity, and phylogenetic endemism, and it is infer that the topographic complexity of the region may be driving the assembly of the pteridine flora indirectly by influencing climate and precipitation patterns.

Studies on the complementary relationship of surface ornamentations between megaspores and microspores of Selaginella P. Beauv. (Selaginellaceae)

The observations support the “synaptospory” hypothesis, that is, spore surface ornamentation plays a part in keeping or bringing spores together during their dispersal in the pteridophytes.

Fern and lycopod spores rain in a cloud forest of Hidalgo, Mexico

The aim of this study was to determine the composition of the “spore rain” of ferns and lycopods in a cloud forest and find the sporulation period for each species.



Demonstrating Spore Dispersal in the Spikemoss, Selaginella martensii

A method for demonstrating the spore dispersal mechanism in Selaginella in the classroom or laboratory using simple and inexpensive materials is described.

A Study of the Sporangia and Gametophytes of Selaginella apus and Selaginella rupestris

  • F. Lyon
  • Education
    Botanical Gazette
  • 1901
Until the sporangium is well established, consisting of some half dozen or more cells, there are almost no indications in the structure, or size, or staining qualities of these cells to distinguish them from the vegetative tissue.

A Study of the Sporangia and Gametophytes of Selaginella apus and Selaginella rupestris (Concluded)

  • F. Lyon
  • Biology
    Botanical Gazette
  • 1901
How much detailed life histories of more species are needed before further inferences are drawn as regards the relation of this group to others is shown.

Aspects of Spore Dispersal in Selaginella

Investigation of spore size and sculpture as well as spore dispersal under calm and under the effect of artificial wind of some Selaginella species found that differ- ences between the species existed that were correlated with active or passive release of micro- and megaspores, and evidence suggests that active spore disperseal and wind may enhance outbreeding.

Spore Discharge in Land Plants

The present volume deals with the Bryophyta and Pteridophyta as well as the Fungi, and examines critically the spore discharge of cryptogamic land plants as a whole.

Calculation of the primary trajectories of spores ejected into still air and laminar flow

  • F. Burrows
  • Engineering
    Proceedings of the Royal Society of London. Series B. Biological Sciences
  • 1988
The plane ballistic trajectories followed by small spherical particles representing a variety of spores ejected into still air are determined for motion in a constant gravitational field and resisted

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  • A. HemsleyP. Griffiths
  • Biology
    Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences
  • 2000
It is shown how development of new concepts regarding microscopic structural development may give rise to new materials with properties that have been tried and tested by organisms over millions of years of evolution and which are more compatible with humans and their environment.