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50 results for “Paulownia”
Paulownia tomentosa (Scrophulariaceae) - whole tree (or vine) - general
Image of Paulownia tomentosa (Scrophulariaceae) - whole tree (or vine) - general
Paulownia tomentosa (Scrophulariaceae) - fruit - lateral or general close-up
Image of Paulownia tomentosa (Scrophulariaceae) - fruit - lateral or general close-up
Paulownia tomentosa (Scrophulariaceae) - fruit - as borne on the plant
Image of Paulownia tomentosa (Scrophulariaceae) - fruit - as borne on the plant
Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - close-up of flower interior
Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Paulownia tomentosa (Scrophulariaceae) - fruit - as borne on the plant
Image of Paulownia tomentosa (Scrophulariaceae) - fruit - as borne on the plant
Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Image of Paulownia tomentosa (Scrophulariaceae) - inflorescence - whole - unspecified
Paulownia tomentosa (Thunb.) Steud. (BR0000012291809)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Paulownia tomentosa (Scrophulariaceae) - leaf - margin of upper + lower surface
Image of Paulownia tomentosa (Scrophulariaceae) - leaf - margin of upper + lower surface
Population Genomics Analysis of 30 Samples from Each of Multiple Populations Reveals Signatures of Selection from Breeding for Rapid Growth and Apical Dominance in Paulownia fortunei
<p><i>Paulownia fortunei</i> is an ecologically and economically valuable tree cultivated for its rapid growth and high-quality timber. To enhance <i>Paulownia</i> germplasm, we have developed the elite variety QingT with patented advantages in growth rate and apical dominance. To illuminate the genetic basis of QingT's superior traits, here we harness comparative population genomics to analyze genomic variation patterns between QingT and common <i>Paulownia</i>. We performed whole-genome re-sequencing of 30 QingT and 30 common samples, detecting 15.6 million SNPs and 2.6 million indels. Phylogeny and population structure analyses robustly partitioned common and QingT into distinct groups which indicate robust genome stabilization. QingT exhibited reduced heterozygosity and linkage disequilibrium decay compared to common <i>Paulownia</i>, reflecting high recombination, indicating hybridizing effects with common white-flowered string is the source of its patented advantages. Genome selection scans uncovered 25 regions of 169 genes with elevated nucleotide diversity, indicating selection sweeps among groups. Functional analysis of sweep genes revealed upregulation of ribosomal, biosynthesis and growth pathways in QingT, implicating enhanced protein production and developmental processes in its rapid growth phenotype. This study's insights comprehensively chart genomic variation during <i>Paulownia</i> breeding, localizing candidate loci governing agronomic traits, and underpinnings of future molecular breeding efforts to boost productivity. </p>
Novel finding of Paulownia fortunei endophytic rhizobia in China
<p><a>Previous research has mainly focused on breeding, timber supply, and physiological-biochemical characteristics of <em>Paulownia fortunei</em>. However, there has been limited attention given to its endophytic rhizobia and its potential benefits for plant growth due to a lack of knowledge about the existence of root nodules. In this study, we extracted 9 bacterial strains from the root nodules after occasionally discovering the </a>nodular-like structure in uncultivated 3-year <em>P. fortunei </em>roots and then sequenced the 16S rDNA and <em>nif</em>A sequencing to conduct the bacterial strain identifications. We then determined the carbon use capability and <a>nitrogenase activity</a> of the bacterial strains. The result of 16S rDNA sequencing indicated that the endophytic rhizobia belongs to the genus <em>Agrobacterium</em>, <em>Rhizobium</em>, <em>Herbaspirillum</em>, and <em>Burkholderia</em>. The results of <em>nif</em>A sequencing indicated that the <em>nif</em>A gene was sequenced in strain PG-3, PG-5, PG-6, PG-7, PG-8, rather than in strain PG-1, PG-2, and PG-4. Besides, the nitrogenase activity of strain PG-9 was significantly higher than other bacterial strains. RDA results indicated that fructose, glucose, and sucrose were significantly related to the plant height, diameter, and biomass rather than other carbon sources and nitrogenase activity. Our research revealed that the majority of bacterial strains isolated from <em>P. fortunei</em> exhibited a broad carbon utilization pathway and have the potential to promote plant growth after re-Inoculation. This study aims to investigate the phylogeny of endophytic rhizobia in <em>P. fortunei</em>, and expand the range of non-legume hosts studied for future research on biological <strong>N</strong> fixation.</p>
Paulownia tomentosa (Scrophulariaceae) - whole tree - general
Image of Paulownia tomentosa (Scrophulariaceae) - whole tree - general
Paulownia tomentosa (Scrophulariaceae) - whole tree - general
Image of Paulownia tomentosa (Scrophulariaceae) - whole tree - general
Paulownia tomentosa (Scrophulariaceae) - whole tree (or vine) - winter
Image of Paulownia tomentosa (Scrophulariaceae) - whole tree (or vine) - winter
Novel finding of Paulownia fortunei endophytic rhizobia in China
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Effects of wildfire and Paulownia tomentosa on native tree regeneration
<p>A wildfire occurred in Shawnee State Forest located in southern Ohio that consumed 1215 hectares. Based on earlier forest inventories it was known that paulownia (<i>Paulownia tomentosa</i>), a non-native invasive tree species, occurred in the forest. The objective of this study was to determine if paulownia heavily colonized areas two years after the fire where the burn occurred, and if its presence had a negative impact on the regeneration (<137 cm height) of native species—red and white oaks (<i>Quercus</i> sp.), red maple (<i>Acer rubrum</i>), and yellow-poplar (<i>Liriodendron tulipifera</i>). Two years after the fire, paulownia had invaded the burned areas but not at significantly higher densities than occurred in the unburned areas. Fire significantly reduced the number of regenerating stems of white oak and red maple two years after the fire, whereas the number of regenerating stems of red oak increased slightly and that of yellow-poplar increased significantly. In areas where paulownia occurred that experienced wildfire, all species studied displayed a reduction in the number of regenerating stems compared to paulownia's absence in the burn areas. Where paulownia occurred in areas not affected by the wildfire, all the native species studied displayed a reduction in the number of regenerating stems. The average heights of red oak, white oak, and red maple were significantly taller when growing in areas affected by the wildfire due to a more open canopy. However, there was no significant change in the average heights of yellow-poplar. The presence of paulownia in both the burned and unburned areas reduced the number of regenerating stems of the native species studied.</p>
Effects of wildfire and Paulownia tomentosa on native tree regeneration
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