The Fern Gazette Volume 21 Part 1

Published 21st May 2019

The Review and Main Articles will be available free of charge 2 years after the publication date.
Until then they can be purchased from Bridget Laue


Edited by M. Gibby & A. Leonard


REVIEW

The role of soils for pteridophyte distribution in tropical American forests
G.M. Moulatlet, G. Zuquim & H. Tuomisto pg(s) 1-20
ABSTRACT
The distributions of plant species are affected by characteristics of their environment, most importantly climate and soils. Ferns and lycophytes (hereafter pteridophytes) are no exception to this general ecological principle. However, until relatively recently, little information has been available about pteridophyte-soil relationships in the tropics. Here we review literature that sheds light on the impact of soil conditions on pteridophyte distribution in the lowland forests of tropical America. We provide examples of both soil-related community-level patterns in species turnover and distributions of individual species and genera along soil gradients. We then discuss the relevance of these patterns for the evolution and diversification of pteridophyte lineages and for practical applications, such as the use of pteridophytes as indicators in classification and mapping of soil-related habitats. Finally, we discuss challenges in filling the gaps of knowledge in pteridophyte-soil relationships and suggest possible solutions for them.

Short biographies of the authors pg(s)21-22

MAIN ARTICLES

Dryopteris ×complexa nothosubsp. transsilvanica: a new hybrid from the Carpathians (Dryopteridaceae, Polypodiophytina)
D. Tlałka, S. Jeßen, A. Rostański & M. Rojek pg(s) 23-34
ABSTRACT
During field studies in the Romanian Southern Carpathians and the Polish Western Carpathians, a new tetraploid fern hybrid was discovered. This taxon is described as Dryopteris ×complexa nothosubsp. transsilvanica (Dryopteris affinis subsp. jessenii × D. filix-mas). The macroscopic identification is supported by flow cytometric and earlier cytological results.

Meiotic chromosome behaviour of apogamously produced haploid sporophytes in Woodwardia orientalis and W. prolifera
S.M. Kawakami, T. Kawakami, J. Kato & S. Kawakami pg(s) 35-41
ABSTRACT
Sporogenesis of dihaploid Woodwardia orientalis with 2n=68 and haploid W. prolifera with 2n=34 produced by induced apogamy was investigated. The meiotic chromosome behaviour in spore mother cells of dihaploid W. orientalis showed many bivalent chromosomes, while that of haploid W. prolifera showed 34 univalent chromosomes at metaphase I. These observations support a basic chromosome number of x=34 for Woodwardia, with W. orientalis being an autotetraploid (2n=4x=136) and W. prolifera a diploid (2n=2x=68). Guard cell sizes of both induced haploid sporophytes were smaller than those their parental sporophytes (t<0.01).

BOOK REVIEW

An annotated checklist of Indian Pteridophytes, Part 2
C.R. Fraser-Jenkins, K.N. Gandhi & B.S. Kholia pg(s) 42-43
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The website of the British Pteridological Society