Abstract：
:Inbreeding depression is a critical factor countering the evolution of inbreeding and thus potentially shaping the evolution of plant sexual systems. Current theory predicts that inbreeding depression could have important evolutionary consequences, even in haploid-dominant organisms. To date, no data have been reported on inbreeding depression in moss species. Here, we present data on the magnitude of inbreeding depression in sporophytic traits of moss species with contrasting breeding systems. In Ceratodon purpureus (Ditrichaceae), a moss species with separate sexes, self-fertilizations between sibling gametophytes (intergametophytic selfing) significantly reduced fitness in two of four traits quantified, with seta length and capsule length having inbreeding coefficients significantly different from zero, resulting in a cumulative inbreeding depression that was also significantly greater than zero (δ = 0.619 ± 0.076). In hermaphroditic Funaria hygrometrica (Funariaceae), there was no evidence of inbreeding depression in seta length, spore number, capsule mass, or capsule length resulting from sporophytes generated by self-fertilization within an individual (intragametophytic selfing), and cumulative inbreeding depression was also not different from zero (δ = 0.038 ± 0.022). These results provide evidence that, despite haploid dominance, inbreeding depression can be expressed at the diploid stage in mosses and may have implications for the evolution and maintenance of combined versus separate sexes in mosses.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Taylor PJ,Eppley SM,Jesson LKdoi
10.3732/ajb.94.11.1853subject
Has Abstractpub_date
2007-11-01 00:00:00pages
1853-9issue
11eissn
0002-9122issn
1537-2197pii
94/11/1853journal_volume
94pub_type
杂志文章abstract：:Phylogenetic analysis of DNA sequences of the chloroplast genes rcbL and ndhf revealed a highly supported clade composed of the families Plantaginaceae, Callitrichaceae, and Hippuridaceae in close association with the model organism Antirrhinum majus and other members of family Scrophulariaceae. Plantago has miniature...
journal_title：American journal of botany
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更新日期：1998-08-01 00:00:00
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更新日期：2007-01-01 00:00:00
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journal_title：American journal of botany
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更新日期：2011-05-01 00:00:00
abstract：:Exotic plant species can threaten closely related native congeners through asymmetric hybridization and subsequent backcrossing, the process known as genetic assimilation. I explore the initial stages of this process in Taraxacum ceratophorum (Asteraceae), the native alpine dandelion, and the invasive apomict T. offic...
journal_title：American journal of botany
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journal_title：American journal of botany
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更新日期：2000-12-01 00:00:00
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journal_title：American journal of botany
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更新日期：2000-05-01 00:00:00
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更新日期：2007-12-01 00:00:00
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更新日期：2014-02-01 00:00:00
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journal_title：American journal of botany
pub_type： 杂志文章
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更新日期：2011-02-01 00:00:00
abstract：:It is generally thought that sedimenting plastids are responsible for gravity sensing in higher plants. We directly tested the model generated by the current statolith hypothesis that the gravity sensing that leads to gravitropism results from an interaction between the plastids and actin microfilaments. We find that ...
journal_title：American journal of botany
pub_type： 杂志文章
doi：
更新日期：1997-11-01 00:00:00
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journal_title：American journal of botany
pub_type： 杂志文章
doi：
更新日期：1997-08-01 00:00:00
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journal_title：American journal of botany
pub_type： 杂志文章
doi：10.3732/ajb.1100465
更新日期：2012-01-01 00:00:00
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journal_title：American journal of botany
pub_type：
doi：10.3732/ajb.1500515
更新日期：2016-01-01 00:00:00
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journal_title：American journal of botany
pub_type： 杂志文章
doi：10.3732/ajb.1500108
更新日期：2016-01-01 00:00:00
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journal_title：American journal of botany
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更新日期：2020-07-01 00:00:00
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更新日期：2008-06-01 00:00:00
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更新日期：2006-12-01 00:00:00
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更新日期：2002-01-01 00:00:00
abstract：:Many characteristics of plants and animals scale with body size as described by allometric equations of the form Y = βM(α), where Y is an attribute of the organism, β is a coefficient that varies with attribute, M is a measure of organism size, and α is another constant, the scaling exponent. In current models, the fr...
journal_title：American journal of botany
pub_type： 杂志文章
doi：10.3732/ajb.0800380
更新日期：2009-05-01 00:00:00
abstract：:Sequence data from the intron and spacer of the trnL-F chloroplast region elucidate the phylogenetic relationships of the tribe Diseae (Orchidoideae: Orchidaceae). Within Diseae, 41 species of Disa, two of Brownleea, three of Satyrium, and two of Corycium were included, with five species of Habenaria sensu lato (Orchi...
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更新日期：2001-11-01 00:00:00
abstract：:There have been three periods of significant discovery in the exploration of fern and lycophyte genetics. First, during the 1930s, Andersson-Kottö conducted crossing studies on ferns. The publication of Manton's magnum opus on fern chromosomes in 1950 stimulated the second. The third emerged from Klekowski's 1973 Amer...
journal_title：American journal of botany
pub_type： 杂志文章,评审
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更新日期：2014-12-01 00:00:00
abstract：:A detailed study of ascomal morphology and development in Cercophora palmicola showed that ontogeny is ascohymeniaceous, giving rise to an ostiolate perithecium. Ascomal initials consist of a coiled ascogonium surrounded by several layers of hyphae whose cells become pseudoparenchymatous. The centrum of the young asco...
journal_title：American journal of botany
pub_type： 杂志文章
doi：
更新日期：1999-06-01 00:00:00
abstract：:We analyzed the effects of temporal variation in floral display size (number of flowers open at one time on a plant) on the rate of pollen removed and receipt of individual flowers for the sequential blooming plant Narthecium asiaticum (Liliaceae). Because of the acropetal blooming of this species, the display sizes w...
journal_title：American journal of botany
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doi：10.3732/ajb.89.3.441
更新日期：2002-03-01 00:00:00
abstract：PREMISE OF THE STUDY:Geographic differences in flower visitor assemblages might lead to among-population differences in the magnitude and pattern of floral integration. However, the role of current pollinator visitation in shaping the magnitude and pattern of floral trait correlations is still controversial. METHODS:W...
journal_title：American journal of botany
pub_type： 杂志文章
doi：10.3732/ajb.1500336
更新日期：2016-02-01 00:00:00
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