Spermiogenesis in the Moss Aulacomnium palustre

Bernhard, Douglas L.; Renzaglia, Karen S.

doi:10.2307/3243642

Cited by 23 publications

(28 citation statements)

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“…Dutcher, 22 Emilio Fernández, 23 Patrick Ferris, 15 Hideya Fukuzawa, 24 David González-Ballester, 17 Diego González-Halphen, 25 Armin Hallmann, 26 Marc Hanikenne, 18 Michael Hippler, 27 William Inwood, 21 Kamel Jabbari, 28 Ming Kalanon, 29 37 James V. Moroney, 38 Jeffrey Moseley, 17 Carolyn Napoli, 39 Aurora M. Nedelcu, 40 Krishna Niyogi, 21 Sergey V. Novoselov, 31 Ian T. Paulsen, 14 Greg Pazour, 41 Saul Purton, 42 Jean-Philippe Ral, 43 Diego Mauricio Riaño-Pachón, 44 Wayne Riekhof, 45 Linda Rymarquis, 46 Michael Schroda, 47 David Stern, 48 James Umen, 15 Robert Willows, 49 Nedra Wilson, 50 Sara Lana Zimmer, 48 Jens Allmer, 51 Janneke Balk, 20 Katerina Bisova, 52 Chong-Jian Chen, 9 Marek Elias, 53 Karla Gendler, 39 Charles Hauser, 54 …”

Section: Full Author List and Affiliationsmentioning

confidence: 99%

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The Chlamydomonas Genome Reveals the Evolution of Key Animal and Plant Functions

Merchant

Prochnik

Vallon

et al. 2007

Science

2,415

2,042

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Chlamydomonas reinhardtii is a unicellular green alga whose lineage diverged from land plants over 1 billion years ago. It is a model system for studying chloroplast-based photosynthesis, as well as the structure, assembly, and function of eukaryotic flagella (cilia), which were inherited from the common ancestor of plants and animals, but lost in land plants. We sequenced the~120-megabase nuclear genome of Chlamydomonas and performed comparative phylogenomic analyses, identifying genes encoding uncharacterized proteins that are likely associated with the function and biogenesis of chloroplasts or eukaryotic flagella. Analyses of the Chlamydomonas genome advance our understanding of the ancestral eukaryotic cell, reveal previously unknown genes associated with photosynthetic and flagellar functions, and establish links between ciliopathy and the composition and function of flagella.

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Section: Full Author List and Affiliationsmentioning

confidence: 99%

“…From this we conclude that Physcomitrella sperm flagella have a "9+2" axoneme containing inner dynein arms, central microtubules, and radial spokes, but lack the outer dynein arms. Although the structure of the Physcomitrella sperm flagellum is not known, sperm flagella of the bryalean moss Aulacomnium palustre have just such an axoneme (44).…”

mentioning

confidence: 99%

The Chlamydomonas Genome Reveals the Evolution of Key Animal and Plant Functions

Merchant

Prochnik

Vallon

et al. 2007

Science

2,415

2,042

View full text Add to dashboard Cite

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“…The majority of research previously conducted on moss sperm focused on sperm architecture and the composition of the sperm mass (Paolillo, 1977(Paolillo, , 1979(Paolillo, , 1981Bernhard & Renzaglia, 1995;Renzaglia et al, 2001), the mechanism of initial sperm release (Paolillo, 1975), and the behavior of the released sperm mass upon encountering the air-water interface (Muggoch & Walton, 1942;Paolillo, 1981). Working forward from these studies in combination with what we know about the daily stresses of many mosses, it seems pertinent to investigate the effects of stress on the reproductive cycle of mosses.…”

Section: Introductionmentioning

confidence: 99%

Tolerance to environmental desiccation in moss sperm

2012

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Summary• Sexual reproduction in mosses requires that sperm be released freely into the environment before finding and fertilizing a receptive female. After release from the male plant, moss sperm may experience a range of abiotic stresses; however, few data are available examining stress tolerance of moss sperm and whether there is genetic variation for stress tolerance in this important life stage.• Here, we investigated the effects of environmental desiccation and recovery on the sperm cells of three moss species (Bryum argenteum, Campylopus introflexus, and Ceratodon purpureus).• We found that a fraction of sperm cells were tolerant to environmental desiccation for extended periods (d) and that tolerance did not vary among species. We found that this tolerance occurs irrespective of ambient dehydration conditions, and that the addition of sucrose during dry-down improved cell recovery. Although we observed no interspecific variation, significant variation among individuals within species in sperm cell tolerance to environmental desiccation was observed, suggesting selection could potentially act on this basic reproductive trait.• The observation of desiccation-tolerant sperm in multiple moss species has important implications for understanding bryophyte reproduction, suggesting the presence of a significant, uncharacterized complexity in the ecology of moss mating systems.

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“…Sperm with variable DNA content have been documented within individual bryophytes (Bernhard & Renzaglia, 1995) and researchers have speculated that due to the prevalence of heterospermy across animal taxa, variable sperm should also be present within non-seed plants (Till-Bottraud et al, 2005). Although the moss sperm are formed through a mitotic pathway, there is potential for variation in spermatogenesis such as during cytoplasmic reduction, or as a result from environmental treatments, as found in some ferns (Southworth & Cresti, 1997 for review).…”

Section: Sperm Variationmentioning

confidence: 99%

“…The majority of research previously conduced on moss sperm focused on sperm architecture and the composition of the sperm mass (Bernhard & Renzaglia, 1995, Paolillo, 1977, Paolillo, 1979; the mechanism of initial sperm release (Paolillo, 1975); and the behavior of the released sperm mass upon encountering the air-water interface . Working forward from these studies in combination with what we know about the daily stresses of many mosses, it seems pertinent to investigate the effects of stress on the reproductive cycle of mosses.…”

Section: Introductionmentioning

confidence: 99%

Testing the Ecological and Physiological Factors Influencing Reproductive Success in Mosses

Shortlidge¹

2000

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As non-vascular, early land plants with an aquatic ancestry, mosses do not regulate internal water conditions separate from that of their environment and as a result, evolved mechanisms to survive in a terrestrial world out of water. Yet, there is a widely accepted dogma that moss reproductive success is solely dependent on rainfall events carrying swimming, bi-flagellate sperm across the landscape to reproductively mature and receptive female mosses -

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Spermiogenesis in the Moss Aulacomnium palustre

Cited by 23 publications

References 0 publications

The Chlamydomonas Genome Reveals the Evolution of Key Animal and Plant Functions

The Chlamydomonas Genome Reveals the Evolution of Key Animal and Plant Functions

Tolerance to environmental desiccation in moss sperm

Testing the Ecological and Physiological Factors Influencing Reproductive Success in Mosses

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