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14 results for “Sextonia”
Low-frequency somatic mutations are heritable in tropical trees Dicorynia guianensis and Sextonia rubra
<p>Somatic mutations potentially play a role in plant evolution, but common expectations pertaining to plant somatic mutation remain insufficiently tested. Unlike in most animals, the plant germline is assumed to be set aside late in development, leading to the expectation that plants accumulate somatic mutations along growth. Therefore, several predictions were made on the fate of somatic mutations: mutations have generally low frequency in plant tissues; mutations at high frequency have a higher chance of intergenerational transmission; branching topology of the tree dictates mutation distribution; and, exposure to UV radiation increases mutagenesis. To provide new insights into mutation accumulation and transmission in plants, we produced two high-quality reference genomes and a unique dataset of 60 high-coverage whole-genome sequences of two tropical tree species, <i>Dicorynia guianensis</i> (Fabaceae) and <i>Sextonia rubra </i>(Lauraceae). We identified 15,066 <i>de novo</i> somatic mutations in <i>D. guianensis</i> and 3,208 in <i>S. rubra</i>, surprisingly almost all found at low frequency. We demonstrate that: 1) low-frequency mutations can be transmitted to the next generation; 2) mutation phylogenies deviate from the branching topology of the tree; and 3) mutation rates and mutation spectra are not demonstrably affected by differences in UV exposure. Altogether, our results suggest far more complex links between plant growth, ageing, UV exposure, and mutation rates than commonly thought.</p>
Sextonia_rubra_fruits_analysis_HSSPMEGCEIMS
<p>These data were acquired in the context of HS-SPME-GC-EI-MS analyses of the fruits of a tropical Guyanese species, Sextonia rubra. Included here are the raw data, pre-processed with MZmine, processed with MetGem and a spreadsheet containing the calculations performed.</p>
SI_IV_3_Reverse chemical ecology to study the defense of the plant host Sextonia rubra and the chemical mediators of its endophyte Fusarium falciforme against phytopathogen Trametes versicolor
<p>Ces travaux présentant les données supplémentaires générés lors de l'étude de la confrontation d'isolat identifiés comme des <em>Fusarium falciforme</em> contre<em> Trametes versicolor</em>.</p>
FIGURE 9 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 9. Sextonia caecus sp. nov., paratype, female: a—coxa 5, b—pereopod 5, c—dorsal carination of episom segments 1–3, d, e, f—epimer 1–3, g—uropod 1, h—uropod 2, i—uropod 3; scale: 1 mm.
FIGURE 8 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 8. Sextonia caecus sp. nov., paratype, female: a—pereopod 1, b—groups of specific setae on the palmar margin of propodus of pereopod 1, c—pereopod 2; scale: 1 mm.
FIGURE 2 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 2. Sextonia caecus sp. nov., holotype, male: a—lateral view, b—dorsal carination of abdominal segments, ccephalon, d—antenna 1, e—antenna 2, f—upper lip; scale: a—2 mm; b, c—0.2 mm; d, e—1 mm; f—0.1 mm.
FIGURE 7 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 7. Sextonia caecus sp. nov., paratype, female: a—right mandible, b—incisor process, lacinia mobilis and molar of right mandible, c—incisor process and lacinia mobilis of left mandible, d—maxilliped, e—tip of dactylus of pereopod 3, f—tip of dactylus of pereopod 4; scale: a, b, c—1 mm; d, e, f—0.1 mm.
FIGURE 5 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 5. Sextonia caecus sp. nov., holotype, male: a—coxa 5, b—coxa 6, c—coxa 7, d—pereopod 5, e—tip of dactylus of pereopod 5, f—pereopod 6, g—pereopod 7; scale: a, b, c, d, f, g—1 mm; e—0.1 mm.
FIGURE 3 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 3. Sextonia caecus sp. nov., holotype, male: a—left mandible, b—incisor process and lacinia mobilis of right mandible, c—lower lips, d—maxilla 1, e—maxilla 2, f—maxilliped; scale: a, f—1 mm; b, c, d, e—0.1 mm.
FIGURE 6 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 6. Sextonia caecus sp. nov., holotype, male: a, b, c—epimer 1–3, d—pleopod 2, e—coupling spines of pleopod 1, fpeduncle of pleopod 3, g, h, i—coupling setae of pleopods 1, 2 and 3, j—uropod 1, k—uropod 2, l—uropod 3, m—telson; scale: a, b, c, d, f, j, k, l, m—1 mm; e, g, h, i—0.1 mm.
FIGURE 4 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 4. Sextonia caecus sp. nov., holotype, male: a—pereopod 1, b—comb setae of palmar margin of propodus of pereopod 1, c—pereopod 2, d—dactylus and palmar margin of propodus of pereopod 2, e—pereopod 3, f—pereopod 4; scale: a, c, e, f—1 mm; d—0.1 mm.
SI_II_6_Metabolomics, reverse chemical ecology and wood science an integrated approach to explore the chemical diversity and natural durability of the tropical tree Sextonia rubra (Mez.) van der Werff (Lauraceae)
<p>Ce document présente les données supplémentaires générées lors de l'étude de la composition chimique et de la durabilité des tissus d'un Sextonia rubra.</p>
FIGURE 1 in A new species of Sextonia Chevreux, 1920 (Crustacea: Amphipoda: Liljeborgiidae) from the Okhotsk Sea
FIGURE 1. Distribution of Sextonia caecus sp. nov. on the shelf of Okhotsk Sea.
SI_III_3_Composition of Antifungal Volatile Organic Compounds in Sextonia rubra Fruits by Molecular Networks
<p>Ce document présente les données supplémentaires générées lors de l'étude de l'hydrolat de fruit de <em>S. rubra</em> par HS-GC-EI-MS.</p>
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