Showing papers on "Cestrum published in 2012"
TL;DR: This study used Cestrum strigilatum (Solanaceae) to understand some aspects of CSR condensation associated with cytosine methylation levels, and to compare the behavior of different heterochromatin types of this species, when subjected to low temperatures.
Abstract: Heterochromatin comprises a fraction of the genome usually with highly repeated DNA sequences and lacks of functional genes. This region can be revealed by using Giemsa C-banding, fluorochrome staining and cytomolecular tools. Some plant species are of particular interest through having a special type of heterochromatin denominated the cold-sensitive region (CSR). Independent of other chromosomal regions, when biological materials are subjected to low temperatures (about 0 °C), CSRs appear slightly stained and decondensed. In this study, we used Cestrum strigilatum (Solanaceae) to understand some aspects of CSR condensation associated with cytosine methylation levels, and to compare the behavior of different heterochromatin types of this species, when subjected to low temperatures.
5 citations
TL;DR: Eight hitherto undescribed species from Mexico, Guatemala, Costa Rica and Panama were identified and described and Affinities of the species are discussed and Global Species Conservation Assessments presented.
Abstract: As part of the preparation of a taxonomic revision of Cestrum (Solanaceae) for Flora Mesoamericana eight hitherto undescribed species from Mexico, Guatemala, Costa Rica and Panama were identified. These eight new species are described and illustrated. Affinities of the species are discussed and Global Species Conservation Assessments presented.The new species are Cestrum amistadense A.K. Monro, sp. nov. (Vulnerable) which most closely resembles Cestrum longiflorum Ruiz & Pav., Cestrum contrerasianum A.K. Monro, sp. nov. (Vulnerable) which most closely resembles Cestrum formosum C.V.Morton, Cestrum darienense A.K. Monro, sp. nov. (Near Threatened) which most closely resembles Cestrum morae Hunz., Cestrum gilliae A.K. Monro, sp. nov. (Near Threatened) which most closely resembles Cestrum morae, Cestrum haberii A.K. Monro, sp. nov. (Vulnerable) which most closely resembles Cestrum poasanum Donn.Sm., Cestrum knappiae A.K. Monro, sp. nov. (Near Threatened) which most closely resembles Cestrum acuminatum Francey, Cestrum lentii A.K. Monro, sp. nov. (Near Threatened) which most closely resembles Cestrum johnniegentrianum D’Arcy and Cestrum talamancaense A.K. Monro (Least Concern) which most closely resembles Cestrum laxum Benth.
5 citations
01 Sep 2012
TL;DR: The antimicrobial activity of different plant argans of the species Cestrum buxifalium Kunt, far Escherichia coli, Pseudamanas aeruginasa, Staph... is evaluated.
Abstract: We evaluated the antimicrobial activity of different plant argans of the species Cestrum buxifalium Kunt, far Escherichia coli, Pseudamanas aeruginasa, Staph...
4 citations
01 Sep 2012
4 citations
01 Jul 2012
TL;DR: The presence in Haiti (Hispaniola Island) of the butterflies Greta diaphanus quisqueya (Fox, 1963) and Papilio demoleus Linnaeus, 1758 (Papilionidae) is documented for the first time.
Abstract: The presence in Haiti (Hispaniola Island) of the butterflies Greta diaphanus quisqueya (Fox, 1963) (Nymphalidae, Danainae) and Papilio demoleus Linnaeus, 1758 (Papilionidae) is documented for the first time. New localities for both species in the Dominican Republic are also included. Cestrum sphaerocarpum O. E. Schulz y Cestrum inclusum Urb. (Solanaceae) are reported as new host plants for the larvae of G. d. quisqueya.
1 citations
01 Jan 2012
TL;DR: The antimicrobial activity of different plant argans of the species Cestrum buxifalium Kunt, far Escherichia coli, Pseudamanas aeruginasa, Staphylacoccus aureus, through the disk diffusion method was evaluated.
Abstract: We evaluated the antimicrobial activity of different plant argans of the species Cestrum buxifalium Kunt, far Escherichia coli, Pseudamanas aeruginasa, Staphylacoccus aureus, through the disk diffusion method, the ethanol extract of the fruits and leavesof C. buxifalium inhibitthe growth of E.coli at a concentration of 30 mg/ml, the ethanol extracts offruits and stemsinhibit the growth front of Pseudamanas aeruginasa in the same concentra tia n with respect to the positive control, none of the extracts were evaluated far inhibition versus Staphylacoccus aureus.
30 Jul 2012
TL;DR: The mature anther wall of Cestrum bigibbosum consist of a papillae epidermis and one layer of endothecium as mentioned in this paper, showing periclinal division in some zones.
Abstract: The mature anther wall of Cestrum bigibbosum consist of a papillae epidermis and one layer of endothecium. The development of the anther wall retrieves the dicotyledoneous type, showing periclinal division in some zones of the middle layer. The endothecium shows a reticulate pattern of thickening, with more branches in the central region of the cell. The tapetum is secretory and degenerates at the free microspore stage. Microspore tetrads are tetrahedral and the pollen grain is two-celled at the shedding stage. Taxonomic significance of male gametophyte is discussed.
01 Jan 2012
TL;DR: The mature anther wall of Cestrum bigibbosum consist of a papillae epidermis and one layer of endothecium, which retrieves the dicotyledoneous type and taxonomic significance of male gametophyte is discussed.
Abstract: The mature anther wall of Cestrum bigibbosum consist of a papillae epidermis and one layer of endothecium. The development of the anther wall retrieves the dicotyledoneous type, showing periclinal division in some zones of the middle layer. The endothecium shows a reticulate pattern of thickening, with more branches in the central region of the cell. The tapetum is secretory and degenerates at the free microspore stage. Microspore tetrads are tetrahedral and the pollen grain is two-celled at the shedding stage. Taxonomic significance of male gametophyte is discussed.