Roles of EMS1 and TPD1 in gametogenesis and sporogenesis in the fern Ceratopteris richardii

2020 ◽  
Author(s):  
Kevin Patrick Falls
Keyword(s):  
Ceratopteris Richardii

Opportunistic heterotrophy in gametophytes of the homosporous fern Ceratopteris richardii

Botany ◽  
2009 ◽  
Vol 87 (8) ◽  
pp. 799-806 ◽  
Author(s):  
Deborah A. Alongi ◽  
Jeffrey P. Hill ◽  
Matthew J. Germino
Keyword(s):  
Sugar Transport ◽  
Light Limitation ◽  
Sugar Uptake ◽  
Growth Media ◽  
Ceratopteris Richardii ◽  
Glucose Depletion ◽  
Homosporous Fern ◽  
Preferential Uptake ◽  
Underlying Mechanisms ◽  
Exogenous Sugar

Fern gametophytes are extremely shade-tolerant, potentially existing for long periods under conditions of extreme light limitation. Many previous studies have demonstrated an increase in gametophyte growth and incidence of spontaneous transition to sporophyte morphology (apogamy) under culture on media containing exogenous sugar. However, these studies did not verify sugar uptake or quantify relative growth on media containing different sugar types. Here, we examine the extent of heterotrophy and underlying mechanisms of sugar transport in photosynthetic gametophytes of the fern Ceratopteris richardii Brongn. Exogenous sugar uptake, growth, and sugar transport were evaluated with assays of exogenous glucose depletion, experimental culture of gametophytes under different sugar and light conditions, and bioinformatic approaches. The glucose from the growth media was significantly depleted by gametophytes growing under all conditions, especially those in the dark compared with those exposed to higher light. Gametophyte area increased similarly when cultured on equimolar concentrations of either glucose or the disaccharide sucrose, likely due to preferential uptake of one of the monomers of sucrose. Although at least one gene with similarity to sucrose transporters is expressed in germinating spores, our results suggest a reliance on monosaccharide transport for exogenous sugar uptake. Glucose assimilation in both light and dark conditions constitutes nutritional opportunism and may enhance gametophyte survival in very low light.

Cytokinins Induce Photomorphogenic Development in Dark-grown Gametophytes of Ceratopteris richardii

2004 ◽  
Vol 45 (9) ◽  
pp. 1252-1260 ◽  
Author(s):  
Mark D. Spiro ◽  
Behzad Torabi ◽  
Catharine N. Cornell
Keyword(s):  
Ceratopteris Richardii

scholarly journals The C-Fern (Ceratopteris richardii) genome: insights into plant genome evolution with the first partial homosporous fern genome assembly

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
D. Blaine Marchant ◽  
Emily B. Sessa ◽  
Paul G. Wolf ◽  
Kweon Heo ◽  
W. Brad Barbazuk ◽  
...  
Keyword(s):  
Genome Evolution ◽  
Green Plant ◽  
Land Plant ◽  
Plant Genome ◽  
Flowering Plant ◽  
Ceratopteris Richardii ◽  
Repeat Elements ◽  
Homosporous Fern ◽  
Homosporous Ferns ◽  
Large Genomes

AbstractFerns are notorious for possessing large genomes and numerous chromosomes. Despite decades of speculation, the processes underlying the expansive genomes of ferns are unclear, largely due to the absence of a sequenced homosporous fern genome. The lack of this crucial resource has not only hindered investigations of evolutionary processes responsible for the unusual genome characteristics of homosporous ferns, but also impeded synthesis of genome evolution across land plants. Here, we used the model fern species Ceratopteris richardii to address the processes (e.g., polyploidy, spread of repeat elements) by which the large genomes and high chromosome numbers typical of homosporous ferns may have evolved and have been maintained. We directly compared repeat compositions in species spanning the green plant tree of life and a diversity of genome sizes, as well as both short- and long-read-based assemblies of Ceratopteris. We found evidence consistent with a single ancient polyploidy event in the evolutionary history of Ceratopteris based on both genomic and cytogenetic data, and on repeat proportions similar to those found in large flowering plant genomes. This study provides a major stepping-stone in the understanding of land plant evolutionary genomics by providing the first homosporous fern reference genome, as well as insights into the processes underlying the formation of these massive genomes.

GENETIC ANALYSIS OF ANTHERIDIOGEN SENSITIVITY IN CERATOPTERIS RICHARDII

1987 ◽  
Vol 74 (12) ◽  
pp. 1872-1877 ◽  
Author(s):  
Rodney J. Scott ◽  
Leslie G. Hickok
Keyword(s):  
Genetic Analysis ◽  
Ceratopteris Richardii

scholarly journals Comparative glycan profiling of Ceratopteris richardii ‘C-Fern’ gametophytes and sporophytes links cell-wall composition to functional specialization

2014 ◽  
Vol 114 (6) ◽  
pp. 1295-1307 ◽  
Author(s):  
Sharon Eeckhout ◽  
Olivier Leroux ◽  
William G. T. Willats ◽  
Zoë A. Popper ◽  
Ronald L. L. Viane
Keyword(s):  
Cell Wall ◽  
Cell Wall Composition ◽  
Functional Specialization ◽  
Ceratopteris Richardii ◽  
Glycan Profiling ◽  
Fern Gametophytes

The effects of light on sex determination in gametophytes of the fern Ceratopteris richardii

2007 ◽  
Vol 120 (5) ◽  
pp. 629-634 ◽  
Author(s):  
Hiroyuki Kamachi ◽  
Orie Iwasawa ◽  
Leslie G. Hickok ◽  
Masaaki Nakayama ◽  
Munenori Noguchi ◽  
...  
Keyword(s):  
Sex Determination ◽  
Ceratopteris Richardii

scholarly journals Characterization of Four Members of the Alpha-Tubulin Gene Family in Ceratopteris richardii

2007 ◽  
Vol 97 (2) ◽  
pp. 47-65 ◽  
Author(s):  
Rodney J. Scott ◽  
Gerald J. Gastony ◽  
Jeremy W. Weatherford ◽  
Takuya Nakazato
Keyword(s):  
Gene Family ◽  
Ceratopteris Richardii ◽  
Tubulin Gene ◽  
Alpha Tubulin
Sign in / Sign up

Export Citation Format

Share Document