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23 results for “clonal reproduction”
Data from: Caloric restriction-mediated reproductive lifespan extension across multiple strains of the clonal aquatic plant <em>Lemna turionifera</em>
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Directed endozoochorous dispersal by scavengers facilitate sexual reproduction in otherwise clonal plants at cadaver sites
<ol> <li>The regeneration niche of many plant species involves spatially and temporally unpredictable disturbances, called recruitment windows of opportunity. However, even species with clear dispersal adaptations such as fleshy berries may not successfully reach such elusive regeneration microsites. Ericaceous, berry-producing species in the northern hemisphere demonstrate this dispersal limitation. They are said to display a reproductive paradox owing to their lack of regeneration in apparently suitable microsites despite considerable investment in producing large quantities of berries.</li> <li>Cadavers generate vegetation-denuded and nutrient-rich disturbances termed cadaver decomposition islands. Cadavers attract facultative scavengers with considerable capacity for endozoochorous seed dispersal. We hypothesize that cadaver decomposition islands facilitate recruitment in berry-producing ericaceous species due to endozoochorous dispersal directed towards favorable microsites with low competition.</li> <li>We examined seedling establishment within a permanent, semi-regular 10 × 10 m grid across an ungulate mass die-off on the Hardangervidda plateau in southeastern Norway. Competing models regarding the relative importance of factors governing recruitment were evaluated, specifically cadaver location (elevated seed rain) and microsite conditions (competition).</li> <li>We found that cadaver decomposition islands did facilitate seedling establishment, as cadaver density was the best predictor of seedling distribution. Other important factors governing seedling establishment such as percentage cover of soil and vascular plants alone were inadequate to explain seedling establishment.</li> <li> <i>Synthesis:</i> This study provides a novel understanding of sexual reproduction in species with cryptic generative reproduction. The directed nature of endozoochorous dispersal combined with long-distance dispersal abilities of medium to large vertebrate scavengers towards cadavers allows plants to exploit the advantageous but ephemeral resource provided by cadaver decomposition islands.</li> </ol>
Polyploidization-enhanced effective clonal reproduction endows the successful invasion of Solidago canadensis
Clonality and ploidy levels are positively associated with plant invasiveness. However, there is still no consensus on whether polyploidization can promote the invasion of alien plants by enhancing clonality. Our recent long-term community succession study found that the more vigorous clone of introduced polyploid Solidago canadensis succeeded into mono-dominant community, which seems to be a positive correlationship between polyploidization and clonal reproduction. However, how polyploidization improves the clonal reproduction of S. canadensis remains unknown. Here, we compared clonal growth ability among diploids and polyploids of S. canadensis from native and introduced ranges in a common garden. Results showed that the rhizomes of S. canadensis originated from axillary buds of dense nodes at the basal stem of seedling and then produced into clonal ramets. Diploids had denser nodes and more buds, developed more rhizomes per unit mass and produced more clonal propagules at the early growth stage compared with polyploids. However, the number of juvenile and secondary rhizomes, as well as the diameter and length of rhizomes in polyploid populations was significant higher than those of diploids, and those clonal traits in introduced polyploids were significant higher than in native polyploids. Moreover, a phalanx growth form was observed in native and introduced diploid populations, which allocated about 3% and 5% of the total biomass to rhizomes, respectively, resulting in short and weak rhizomes. However, native and introduced polyploids allocated about 35% and 40%, respectively, of the total biomass to rhizomes, resulting in long and strong rhizomes, which were guerrilla growth forms. This study firstly shows that polyploidization enhanced the effective clonal reproduction of S. canadensis through pre-adaptation and rapid post-adaptation evolution, and consequently contributed to its successful invasion.
Directed endozoochorous dispersal by scavengers facilitate sexual reproduction in otherwise clonal plants at cadaver sites
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Data from: Genetic analysis reveals the putative native range and widespread double‐clonal reproduction in the invasive longhorn crazy ant
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The fecundity–longevity trade-off in a clonal eusocial insect: in isolation, subordinate workers match dominants in reproduction
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Polyploidization-enhanced effective clonal reproduction endows the successful invasion of Solidago canadensis
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Data from: Reproductive strategies and isolation-by-demography in a marine clonal plant along an eutrophication gradient
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Self and nonself recognition affects clonal reproduction and competition in the pea aphid
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Data from: Clonal reproduction shapes evolution in the lizard malaria parasite Plasmodium floridense
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Code for: Environmental fluctuations dampen the effects of clonal reproduction on evolutionary rescue
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Data from: Recurrent fruit harvesting reduces seedling density but increases the frequency of clonal reproduction in a tropical tree
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Data from: Demographic consequences of greater clonal than sexual reproduction in Dicentra canadensis
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Data from: How clonal are clones? A quest for loss of heterozygosity during asexual reproduction in Daphnia magna
Due to the lack of recombination, asexual organisms are predicted to accumulate mutations and show high levels of within-individual allelic divergence (heterozygosity) however, empirical evidence for this prediction is largely missing. Instead, evidence of genome homogenization during asexual reproduction is accumulating. Ameiotic crossover recombination is a mechanism that could lead to long genomic stretches of loss of heterozygosity (LOH) and unmasking of mutations that have little or no effect in heterozygous state. Therefore, LOH might be an important force for inducing variation among asexual offspring and may contribute to the limited longevity of asexual lineages. To investigate the genetic consequences of asexuality, here we used high-throughput sequencing of Daphnia magna for assessing the rate of LOH over a single generation of asexual reproduction. Comparing parthenogenetic daughters with their mothers at several thousand genetic markers generated by Restriction site Associated DNA (RAD) sequencing resulted in high LOH rate estimation that largely overlapped with our estimates for the error rate. To distinguish these two, we Sanger re-sequenced the top 18 candidate RAD-loci for LOH, and all of them proved to be false positives. Hence, even though we cannot exclude the possibility that short stretches of LOH occur in genomic regions not covered by our markers, we conclude that LOH does not occur frequently during asexual reproduction in D. magna and ameiotic crossovers are very rare or absent. This finding suggests that clonal lineages of D. magna will remain genetically homogeneous at least over time periods typically relevant for experimental work.
Data from: Network size‐dependent impact on vegetative growth and sexual reproduction in clonal patches of white clover Trifolium repens
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Data from: How clonal are clones? A quest for loss of heterozygosity during asexual reproduction in Daphnia magna
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The genomes and epigenomes of aquatic plants (Lemnaceae) promote triploid hybridization and clonal reproduction
GEO Series GSE238136. Lemna gibba; Lemna japonica; Lemna turionifera; Lemna minor; Wolffia australiana; Spirodela polyrhiza. 66 samples. Type: Methylation profiling by high throughput sequencing; Other; Non-coding RNA profiling by high throughput sequencing; Expression profiling by high throughput sequencing; Genome binding/occupancy profiling by high throughput sequencing.
The genomes and epigenomes of aquatic plants (Lemnaceae) promote triploid hybridization and clonal reproduction [WGS]
GEO Series GSE238135. Lemna gibba; Lemna japonica; Lemna turionifera; Lemna minor; Wolffia australiana. 17 samples. Type: Other.
The genomes and epigenomes of aquatic plants (Lemnaceae) promote triploid hybridization and clonal reproduction [ChIP-Seq]
GEO Series GSE288765. Lemna minor; Lemna japonica; Lemna turionifera. 24 samples. Type: Genome binding/occupancy profiling by high throughput sequencing.
The genomes and epigenomes of aquatic plants (Lemnaceae) promote triploid hybridization and clonal reproduction [smallRNA-Seq]
GEO Series GSE238134. Lemna japonica; Lemna gibba; Wolffia australiana; Spirodela polyrhiza. 12 samples. Type: Non-coding RNA profiling by high throughput sequencing.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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