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219 results for “liverworts”
Data from: Monitoring the growth and habitat shifts of epiphyllous liverworts in subtropical forests of China
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Temperature-dependence of liverwort diversification: Cool origin and hot hotspots
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Data from: Past distribution of epiphyllous liverworts in China: the usability of historical data
Epiphyllous liverworts form a special group of bryophytes that primarily grow on the leaves of understory vascular plants in tropical and subtropical evergreen broadleaf forests. Being sensitive to moisture and temperature changes, epiphyllous liverworts are often consider to be good indicators of climate change and forest degradation. However, they are a poorly collected and taxonomically complicated group, with an only partly identified distribution pattern. In this study, we built four models based on 24 environmental variables at four different spatial resolutions (i.e., 1 km, 5 km, 10 km, and 15 km) to predict the past distribution of epiphyllous liverworts in China, using Maxent model and 63 historical location records (i.e., presence-only data). Both area under the curve of the receiver operating characteristic (AUC) and true skill statistic (TSS) methods are used to assess the model performance. Results showed that the model with the predictors at a 15-km resolution achieved the highest predictive accuracy (AUC=0.946; TSS=0.880), although there was no statistically significant difference between the four models (p > 0.05). The most significant environmental variables included aridity, annual precipitation, precipitation of wettest month, precipitation of wettest quarter, precipitation of warmest quarter, annual mean NDVI, and minimum NDVI. The predicted suitable areas for epiphyllous liverworts were mainly located in the south of Yangtze River and seldom exceeds 35° N, which were consistent with the museum and herbarium records, as well as the historical records in scientific literatures. Our study further demonstrated the value of historical data to ecological and evolutionary studies.
The Great British Liverwort Hunt – collecting wild accessions for molecular biology research while engaging the public
<p>During the lockdowns of the COVID-19 pandemic, outreach activities of universities were significantly perturbed. The Sainsbury Laboratory Cambridge University (SLCU) outreach project for the Cambridge festival in 2021 was therefore a fully online project, which asked people from across the mainland of the United Kingdom to send in plant samples of <i>Marchantia polymorpha</i>, and <i>Lunularia cruciata. </i>The samples were, upon arrival, established into axenic culture for use in research. Here, we deposit the names and locational data of the lines established in axenic culture for the wider use of the research community. Out of 76 samples received, 68 were successfully established in sterile tissue culture. This dataset also includes an analysis of the sex of the <i>M. polymorpha</i> accessions.</p>
FIGURE 1 in Early Land Plants Today (ELPT): How many liverwort species are there?
FIGURE 1. Number of novel liverwort species, excluding new combinations, which have been described over the last 250 years, with an inset of the number described from 2001–2009.
FIGURE 3 in Early Land Plants Today (ELPT): How many liverwort species are there?
FIGURE 3. The relationship between synonymy rate and number of species. Synonymy rates for individual monographs from Table 4 are displayed as dots. The current best estimate for the number of liverwort species, 7,486, is indicated by the arrow. Upper and lower estimates (the 95% confidence interval) of 5,536 and 9,432, respectively are shown by dashed lines.
FIGURE 2 in Early Land Plants Today (ELPT): How many liverwort species are there?
FIGURE 2. The geographical distribution of the almost 670 new species that have been described from 1990 to 2009. Dot size represents the number of new species in each area (maximum 81 in New Zealand).
Figure 5 in Vertical distribution of liverwort communities and their relationship with environmental factors in a karst sinkhole in south-western China
Figure 5. The canonical correspondence analysis between liverwort community distribution and environmental factors: humidity, temperature and light levels.
Figure 3 in Vertical distribution of liverwort communities and their relationship with environmental factors in a karst sinkhole in south-western China
Figure 3. Variation in abundance of species, genera and families recorded in liverwort communities at different depths.
Figure 2 in Vertical distribution of liverwort communities and their relationship with environmental factors in a karst sinkhole in south-western China
Figure 2. The variation in diversity and the number of species, genera and families recorded in liverwort communities at different depths.
Fig. 4 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 4. Effect of incubation after tissue-disruption on the amounts of endogenous volatiles. Volatiles were extracted with methyl tert-butyl ether from intact thalli (lower chromatogram) or from freeze–thaw treated thalli (upper chromatogram), and analyzed using GC–MS. Inset shows the enlarged chromatogram from 15.8 to 18.4 min. C15 sesquiterpenoids with the chemical formulas C15H24 (m/z 204, with peaks k to p) and C15H26O (m/z 222, with the peaks q and r) were tentatively identified based on their MS profiles (Supplemental Fig. S2).
Fig. 6 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 6. Resolution of enantiomers of 5 formed from racemic 3. The crude enzyme extract prepared from des6KO thalli was reacted with racemic 3, and the 5 formed by enzyme catalyzed hydrolysis was subjected to chiral phase GC analysis (upper chromatogram). 5 was not detected with the reaction mixture prepared without substrate (middle chromatogram) or without enzyme (lower chromatogram).
Fig. 3 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 3. Time course of emission of 1 and 5 after mechanical wounding of M. polymorpha thallus grown in a field. Average ± s.e. (n = 6) is shown. Different letters for each compound refer to significant differences (ANOVA, Bonferroni, P <0.01).
Fig. 5 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 5. Effect of incubation after tissue disruption on C8 volatile formation. The thalli were frozen and the volatiles were extracted (white bars), or the frozen thalli were thawed, and incubated for 5 min at 24 °C to facilitate the enzyme reaction (gray bar). Average ± s.e. (n = 4) is shown. Asterisks indicate significant differences for the noted compound (Student's t-test, ⁄⁄⁄P <0.001).
Fig. 8 in Arachidonic acid-dependent carbon-eight volatile synthesis from wounded liverwort (Marchantia polymorpha)
Fig. 8. Effect of addition of NAD(P)H on the C8 volatiles emitted from M. polymorpha thalli. C8 volatiles extracted from intact (white bars), partially wounded (50%, gray bars), totally disrupted (black bars), totally disrupted in the presence of NADH (coarse stripe), and totally disrupted M. polymorpha thalli in the presence of NADPH (dense stripe) were quantified. The average ± s.e. (n = 4–5) is shown. Different letters for each compound refer to significant differences (one way ANOVA, Fisher, P <0.05).
FIGURE. 1. A in Riccia anatolica sp. nov. a new liverwort (Ricciaceae) species from Turkey
FIGURE. 1. A—Habit of Riccia anatolica; B—Habitats of Riccia anatolica in the Mediterranean Region of Turkey.
FIGURE 2 in Riccia anatolica sp. nov. a new liverwort (Ricciaceae) species from Turkey
FIGURE 2. Plant outline and transverse sections of thallus. 1.—Habit of thalli; 2.—cross-sections of lobe; 3. and 4.—epidermis of 2 layers (e: epidermis, se: subepidermis); 5.—marginal cilia; 6.—dorsal view of epithelial cells and air pores. Drawn by M.Kırmacı
Biogenesis, conservation and function of miRNA in liverworts
<p>Recent findings on liverwort micro RNA repertoire, <em>Marchantia </em>miRNA gene organization, biogenesis, functions, and microprocessor, auxiliary, and regulatory proteins involved in miRNA biogenesis</p>
FIGURE. Fossombronia cristula Austin II in Thalloid Liverworts (Marchantiopsida) of Sri Lanka
FIGURE. Fossombronia cristula Austin II. Thalli with simple, quadrate, obliquely inserted leaves in two rows. Ruklani & Rubasinghe 68-14SR (PDA).
FIGURE. Jensenia decipiens (Mitt.) Grolle II. (A) Fan-shaped erect shoots (B) Marginal tooth of thallus. A, B Ruklani & Rubasinghe 66-14SR (PDA) in Thalloid Liverworts (Marchantiopsida) of Sri Lanka
FIGURE. Jensenia decipiens (Mitt.) Grolle II. (A) Fan-shaped erect shoots (B) Marginal tooth of thallus. A, B Ruklani & Rubasinghe 66-14SR (PDA)
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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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