Topic
Cestrum
About: Cestrum is a research topic. Over the lifetime, 110 publications have been published within this topic receiving 1158 citations.
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TL;DR: The rust fungus Uromyces cestri Bertero ex Mont. (Pucciniales: Pucciniaceae) was found on Cestrum parqui L'Hér.
Abstract: In 2008, a field survey was conducted in northern Argentina to collect natural enemies of Cestrum species (Solanaceae) for use as biological control agents in South Africa. The rust fungus Uromyces cestri Bertero ex Mont. (Pucciniales: Pucciniaceae) was found on Cestrum parqui L'Her. and imported into quarantine facilities in South Africa. No damaging pathogens were found on Cestrum laevigatum Schltdl. Preliminary host-range studies showed that U. cestri was able to infect and cause disease on C. parqui and on Cestrum elegans (Brongn. ex Neumann) Schltdl. in South Africa, and could have potential for the biological control of these species. The rust did not infect any of the other Cestrum species tested, and neither did it infect C. laevigatum which is the most problematic Cestrum species in South Africa.
7 citations
TL;DR: The presence of Cestrum intermedium plants that was being ingested by the bovine associated with the hepatic lesions was decisive for the diagnosis of acute hepatic insufficiency.
Abstract: In June of 2007, mortality in cattle with clinical signs and lesions of acute hepatic insufficiency on a farm located in the hillside of Rio Grande do Sul mountain range was attributed to Cestrum intermedium consumption. From 17 bovines, two died up to 12 hours presenting clinical signs such as muscular tremors, incoordination, aggressiveness, lateral recumbence and death. Macroscopic lesions were found primary in the liver and were characterized by a slightly increased volume and diffuse accentuation of the lobules. Microscopically, the liver showed diffuse and accentuated centrilobular coagulative necrosis. The presence of Cestrum intermedium plants that was being ingested by the bovine associated with the hepatic lesions was decisive for the diagnosis.
6 citations
TL;DR: Although A and B chromosomes displayed redundancy in the repetitive DNA families in different species, the B of C. strigilatum seemed to differ from those Bs of other Cestrum species by the loss of rDNA fractions, and a possible origin of Bs in Cestrums was discussed.
Abstract: Species of Cestrum (Linnaeus, 1753) have shown large diversity in the accumulation and distribution of repetitive DNA families, and B chromosomes have been described in seven species. Some types of repetitive DNA were identified in A and B chromosomes in species of this plant group, such as AT-rich SSR, 35S and 5S rDNA, C-Giemsa and C-CMA/DAPI bands and retrotransposons. To increase our understanding of the relationships of A and B chromosomes, the B of C. strigilatum Ruiz & Pavon, 1799 was microdissected, amplified and hybridized in situ against chromosomes of this species, and in six other species of this genus. FISH signals were observed in whole the B of C. strigilatum, including stretches of A chromosomes, as well as in some A chromosomes of all tested species. A strong FISH signal was seen adjacent to the 5S rDNA in the proximal region of pair 8 of all species and, due to this, we have searched for 5S rDNA fragments in the microdissected B chromosome. PCR and sequencing data evidenced 5S rDNA deletion along evolutionary pathways of the B of C. strigilatum. Although A and B chromosomes displayed redundancy in the repetitive DNA families in different species, the B of C. strigilatum seemed to differ from those Bs of other Cestrum species by the loss of rDNA fractions. A possible origin of Bs in Cestrum was discussed.
6 citations
TL;DR: In this article, the authors used chromosome banding and fluorescence in situ hybridization (FISH) to characterize the karyotypes and populations of two species, Cestrum nocturnum L. and C. mariquitense Kunth.
Abstract: Species of Cestrum L. (Solanaceae) exhibit large variability in the accumulation of repetitive DNA, although their species possess a stable diploid number with 2n = 16. In this study, we used chromosome banding and fluorescence in situ hybridization (FISH) to characterize the karyotypes and populations of two species, Cestrum nocturnum L. and C. mariquitense Kunth. We also performed a karyotype comparison using 16 idiograms, of which 4 were developed in this study and 12 were obtained from the literature. Cestrum nocturnum displayed more bands than C. mariquitense, but the latter exhibited greater interpopulational variation in the band patterns. There was a tendency for large bands to be located at intercalary/terminal regions and for small bands to be located at intermediate/proximal regions. The idiogram comparison revealed a large variation in the amount, distribution, and size of heterochromatic bands. FISH with rDNA probes revealed stability in the number and location of 5S sites, while 45S was more...
6 citations
TL;DR: Identification keys, descriptions and illustrations of some species, besides the geographical distribution data, flowering and fruiting periods, are presented in this study.
Abstract: This paper consisted of the Cestrum taxon survey in south Higrophyllous Forest and extreme south of Bahia State, Brazil. 12 species were found: C. amictum Schltdl., C. coriaceum Miers, C. laevigatum Schltdl., C. lanceolatum Schott ex Sendtn, C. martii Sendtn, C. megalophyllum Dunal, C. parqui L`Her., C. retrofractum Dunal, C. salzmannii Dunal, C. schlechtendahlii G. Don, C. sendtenerianum Mart. ex Sendtn and C. viminale Sendtn. Identification keys, descriptions and illustrations of some species, besides the geographical distribution data, flowering and fruiting periods, are presented in this study
6 citations