Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
-
- Goodyera pubescens (3)
- Orchidaceae (3)
- Downy rattlesnake plantain (2)
- Anura (1)
- Biological sciences (1)
-
- Botany (1)
- Demographic history (1)
- Downy rattlesnake (1)
- Forest ecology (1)
- Forest succession (1)
- Heartleaf (1)
- Hexastylis (1)
- JG-03-14 pyrrole compound; RAW264.7 macrophages; Inflammation; NF-κB; TNF-α; Nitric oxide (1)
- Mutualism (1)
- Orchid (1)
- Pampas (1)
- Photography-based taxonomy (1)
- Phylogeography (1)
- Pleistocene (1)
- Pollination (1)
- Seed dispersal (1)
- South America (1)
- Symbiotic fungi (1)
- Taxonomy (1)
- Virginia native plant (1)
Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
Photography-Based Taxonomy Is Inadequate, Unnecessary, And Potentially Harmful For Biological Sciences, Luis M. P. Ceríaco, Eliécer E. Gutiérrez, Alain Dubois, Rafael O. De Sá, Et Al.
Photography-Based Taxonomy Is Inadequate, Unnecessary, And Potentially Harmful For Biological Sciences, Luis M. P. Ceríaco, Eliécer E. Gutiérrez, Alain Dubois, Rafael O. De Sá, Et Al.
Biology Faculty Publications
The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009; Cianferoni & Bartolozzi 2016; Amorim et al. 2016). This question was again raised in a letter supported by 35 signatories published in the journal Nature (Pape et al. 2016) on 15 September 2016. On 25 September 2016, the following rebuttal (strictly limited to 300 words as per …
Endless Symbioses Most Intricate, W. John Hayden
Endless Symbioses Most Intricate, W. John Hayden
Biology Faculty Publications
Orchids, such as our Wildflower of the Year for 2016, Downy Rattlesnake Plantain (Goodyera pubescens) (Fig. 1), exemplify the interconnectedness of life on Earth. As would be the case for many kinds of plants, pollination comes readily to mind as a prominent example of mutualistic symbiosis. Downy Rattlesnake Plantain is pollinated by bumblebees and other native bees. The bees gain nectar and the orchid gets an efficient means to move pollen from one flower to another; each organism gains benefit from the interaction, the very definition of mutualism. Pollination by bees is widespread among the orchids, but there …
Seed Dispersal: A Tale Of Two Species, W. John Hayden
Seed Dispersal: A Tale Of Two Species, W. John Hayden
Biology Faculty Publications
Orchids have minute, dustlike seeds. In this respect, Goodyera pubescens (Downy Rattlesnake Plantain), the 2016 VNPS Wildflower of the Year, is a typical orchid. Like all other orchids, Goodyera seeds contain little more than a few embryonic cells enclosed in a thin seed coat. There are two advantages to small seed size in orchids: minute seeds can be produced in prodigious quantities, and they can disperse over great distances by wind.
Jewels Of The Orchidaceae, W. John Hayden
Jewels Of The Orchidaceae, W. John Hayden
Biology Faculty Publications
To temperate-zone plant enthusiasts, the orchid family seems more than a little strange. On the one hand, native orchids grow wild without assistance from people, they are rooted in the soil, and they survive freezing cold winter temperatures. On the other hand, the tropical orchids that we encounter are ornamental plants, pampered by their human caregivers, cultured indoors in pots filled with fir bark or other media designed to mimic the plants’ natural epiphytic habit, and, as a group, these ornamental tropical orchids have essentially zero tolerance to frost. Of course, their flowers, fruits, and seeds define them all as …
Effects Of A Pyrrole-Based, Microtubule-Depolymerizing Compound On Raw 264.7 Macrophages, John A. Ciemnieckia, Clarke P. Lewis, John T. Gupton, Krista J. Stenger
Effects Of A Pyrrole-Based, Microtubule-Depolymerizing Compound On Raw 264.7 Macrophages, John A. Ciemnieckia, Clarke P. Lewis, John T. Gupton, Krista J. Stenger
Biology Faculty Publications
RAW 264.7 murine macrophages were exposed to the pyrrole-based compound 3,5-Dibromo-4-(3,4-dimethoxyphenyl)-1H-pyrrole-2-carboxylic acid ethyl ester (JG-03-14), which is a known microtubule depolymerizing agent with antitumor activity [1,2,3]. In this study exposure to JG-03-14 reduced the production of pro-inflammatory molecules by macrophages activated with lipopolysaccharide (LPS). Treatment with the pyrrole-based compound decreased the concentration of tumor necrosis factor-α (TNF-α) and nitric oxide (NO) released from the macrophages. Exposure to JG-03-14 also decreased TNF-α mRNA expression levels and the protein expression levels of inducible nitric oxide synthase (iNOS), the enzyme responsible for NO production in the activated macrophages. Furthermore, JG-03-14 treatment significantly changed …
High Genetic Diversity But Low Population Structure In The Frog Pseudopaludicola Falcipes (Hensel, 1867) (Amphibia, Anura) From The Pampas Of South America, José A. Langone, Arley Camargo, Rafael O. De Sá
High Genetic Diversity But Low Population Structure In The Frog Pseudopaludicola Falcipes (Hensel, 1867) (Amphibia, Anura) From The Pampas Of South America, José A. Langone, Arley Camargo, Rafael O. De Sá
Biology Faculty Publications
Relative to South America’s ecoregions, the temperate grasslands of the Pampas have been poorly studied from a phylogeographic perspective. Based on an intermediate biogeographic setting between subtropical forest (Atlantic Forest) and arid ecosystems (Chaco and Patagonia), Pampean species are expected to show unstable demographic histories due to the Quaternary climatic oscillations. Herein, we investigate the phylogenetic relatedness and phylogeographic history of Pseudopaludicola falcipes, a small and common frog that is widely distributed across the Pampean grasslands. First, we use molecular data to assess if P. falcipes represents a single or multiple, separately evolving cryptic lineages. Because P. falcipes is …
2016 Virginia Wildflower Of The Year: Downy Rattlesnake Plantain, Goodyera Pubescens, W. John Hayden
2016 Virginia Wildflower Of The Year: Downy Rattlesnake Plantain, Goodyera Pubescens, W. John Hayden
Biology Faculty Publications
Regardless of season, Downy Rattlesnake Plantain is a delight to encounter in the woods of Virginia. This evergreen orchid is a perennial rhizomatous herb of the forest floor. The horizontal rhizomes, usually covered lightly by leaf litter, bear roots at intervals and terminate in a rosette of leaves. Leaves are alternate, somewhat crowded together, and only slightly elevated above ground level. Leaf blades are ovate, 3–8 cm long, and 1.5–3 cm wide, often of varying size within a rosette. Leaves are present year-round, bluish-green, with prominent white veins; on each leaf, a broad midvein is flanked by two smaller veins …