The Biology of the Fern Ceratopteris and Its Use as a Model System

Hickok, Leslie G.; Warne, Thomas R.; Fribourg, Renée S.

doi:10.1086/297255

Cited by 130 publications

(110 citation statements)

References 50 publications

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“…We detected strong but incomplete reproductive isolation between divergent populations of C. richardii, consistent with the low F 1 spore viability reported for the same cross ($30%) in a previous study (Hickok et al 1995). Although multiple developmental stages likely contribute to reproductive isolation, spore inviability appears to be the dominant reproductive barrier in Ceratopteris (Figure 1).…”

Section: Mechanisms Of Reproductive Isolationsupporting

confidence: 89%

A Genomewide Study of Reproductive Barriers Between Allopatric Populations of a Homosporous Fern,Ceratopteris richardii

et al. 2007

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Biological factors involved in reproductive barriers between two divergent races of Ceratopteris richardii were investigated. We used a combination of spore germination rates, QTL analysis of spore germination rates, and transmission ratio distortion (TRD) of 729 RFLPs, AFLPs, and isozyme markers distributed across the genome on the basis of hybrid populations of 488 doubled haploid lines (DHLs) and 168 F 2 's. Substantial reproductive barriers were found between the parental races, predominantly in the form of spore inviability (23.7% F 1 spore viability). Intrinsic genetic factors such as Bateson-Dobzhansky-Muller (BDM) incompatibilities involving both nuclear-nuclear and nuclear-cytoplasmic factors and chromosomal rearrangements appear to contribute to intrinsic postzygotic isolation. The genomewide distribution patterns of TRD loci support the hypothesis that reproductive barriers are a byproduct of divergence in allopatry and that the strong reproductive barriers are attributable to a small number of genetic elements scattered throughout the genome.

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Section: Mechanisms Of Reproductive Isolationsupporting

confidence: 89%

A Genomewide Study of Reproductive Barriers Between Allopatric Populations of a Homosporous Fern,Ceratopteris richardii

et al. 2007

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“…Hn-n, the wild-type strain of C. richardii used in this study, is described by Hickok et al (32). The antheridiogen (A CE )-insensitive hermaphroditic (her) mutants are described by Banks (21), and the two ABA-insensitive mutants HαA48 and HαA104 (referred to here as gaia1-3 and gaia4, respectively) are described by Hickok (33).…”

Section: Methodsmentioning

confidence: 99%

Abscisic acid controlled sex before transpiration in vascular plants

McAdam

Brodribb

Banks

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

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Sexual reproduction in animals and plants shares common elements, including sperm and egg production, but unlike animals, little is known about the regulatory pathways that determine the sex of plants. Here we use mutants and gene silencing in a fern species to identify a core regulatory mechanism in plant sexual differentiation. A key player in fern sex differentiation is the phytohormone abscisic acid (ABA), which regulates the sex ratio of male to hermaphrodite tissues during the reproductive cycle. Our analysis shows that in the fern Ceratopteris richardii, a gene homologous to core ABA transduction genes in flowering plants [SNF1-related kinase2s (SnRK2s)] is primarily responsible for the hormonal control of sex determination. Furthermore, we provide evidence that this ABA-SnRK2 signaling pathway has transitioned from determining the sex of ferns to controlling seed dormancy in the earliest seed plants before being co-opted to control transpiration and CO 2 exchange in derived seed plants. By tracing the evolutionary history of this ABA signaling pathway from plant reproduction through to its role in the global regulation of plant-atmosphere gas exchange during the last 450 million years, we highlight the extraordinary effect of the ABA-SnRK2 signaling pathway in plant evolution and vegetation function.OST1 | fern | stomata | evolution | sex determination

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“…2e). Our experience suggests that sporophyte production following cryopreservation occurs more quickly in C. thalictroides than in most fern species, the life cycle of Ceratopteris being completed in just 120 d [17].…”

Section: Resultsmentioning

confidence: 86%

A simple way to overcome the recalcitrance of the water fern Ceratopteris thalictroides (L.) Brongn. to cryopreservation

2015

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Ceratopteris thalictroides is a water fern very sensitive to both dehydration and low temperature. This study focuses on the cryopreservation of this species by encapsulation-dehydration technique, in particular on the effects of pre-culture step, alginate bead size and the physical conditions of culture on the cryopreservation efficiency. Encapsulated and non-precultured gametophytes did not survive cooling with liquid nitrogen. When cryopreservation was preceded by a 2-week period of pre-culture, regrowth reached 42.1%. Reduction in the size of the alginate bead, and culture in total darkness resulted in improved gametophyte regrowth capacity (75.5% or 81.7%, respectively). The best results (91.3%) were obtained when all factors tested occurred simultaneously. The gametophytes recovered very quickly and sporophytes were formed within 4 weeks after rewarming. These simple improvements can be used, not only for the cryopreservation of gametophytes in cryptogams but also for some recalcitrant species of seed plants.

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The Biology of the Fern Ceratopteris and Its Use as a Model System

Cited by 130 publications

References 50 publications

A Genomewide Study of Reproductive Barriers Between Allopatric Populations of a Homosporous Fern,Ceratopteris richardii

A Genomewide Study of Reproductive Barriers Between Allopatric Populations of a Homosporous Fern,Ceratopteris richardii

Abscisic acid controlled sex before transpiration in vascular plants

A simple way to overcome the recalcitrance of the water fern Ceratopteris thalictroides (L.) Brongn. to cryopreservation

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