1
|
Tillmann M, Felix A, Mueller E, Felix S, Alves G, Ramos T, Freitag R, Fernandes C, Nobre M. Use of Triticum aestivum in open wound healing: a clinical, pathological, and tensiometric assessment in the rabbit model. ARQ BRAS MED VET ZOO 2014. [DOI: 10.1590/1678-7132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
While Triticum sp. has been shown to act in wound healing, stimulating collagen synthesis by fibroblasts, the use of this plant extract has yet to be assessed in vivo, in commercially viable presentations. This study used rabbits and assessed, on days seven, 14, and 21, the presence or absence of granulation tissue and epithelialization, histopathological structures, and scar quality through the breaking and tension strength. Treatments, performed for 21 days, were aqueous extract of T. aestivum at a concentration of 2mg/mL (group I) and 10mg/mL (group II) and a nonionic cream (control group). We demonstrate that the formation of granulation tissue was not significantly different between treatments. In the analysis of epithelial tissue, wounds in group II differed from other treatments by day 7. On days 14 and 21 there was no significant clinical difference between groups. In the histopathological evaluation, scar quality and rupture strength did not differ between the groups in the studied period. In the tension strength evaluation, group I differed from the others, presenting a higher tension strength overall. The studied treatments did not differ regarding healing evolution of the skin wounds, but T. aestivum extract, at 2mg/mL, presents better results in the tension strength evaluation.
Collapse
|
2
|
Rustgi S, Matanguihan J, Mejías JH, Gemini R, Brew-Appiah RAT, Wen N, Osorio C, Ankrah N, Murphy KM, von Wettstein D. Assessment of genetic diversity among barley cultivars and breeding lines adapted to the US Pacific Northwest, and its implications in breeding barley for imidazolinone-resistance. PLoS One 2014; 9:e100998. [PMID: 24967712 PMCID: PMC4072767 DOI: 10.1371/journal.pone.0100998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2014] [Accepted: 06/02/2014] [Indexed: 11/19/2022] Open
Abstract
Extensive application of imidazolinone (IMI) herbicides had a significant impact on barley productivity contributing to a continuous decline in its acreage over the last two decades. A possible solution to this problem is to transfer IMI-resistance from a recently characterized mutation in the 'Bob' barley AHAS (acetohydroxy acid synthase) gene to other food, feed and malting barley cultivars. We focused our efforts on transferring IMI-resistance to barley varieties adapted to the US Pacific Northwest (PNW), since it comprises ∼23% (335,000 ha) of the US agricultural land under barley production. To effectively breed for IMI-resistance, we studied the genetic diversity among 13 two-rowed spring barley cultivars/breeding-lines from the PNW using 61 microsatellite markers, and selected six barley genotypes that showed medium to high genetic dissimilarity with the 'Bob' AHAS mutant. The six selected genotypes were used to make 29-53 crosses with the AHAS mutant and a range of 358-471 F1 seeds were obtained. To make informed selection for the recovery of the recipient parent genome, the genetic location of the AHAS gene was determined and its genetic nature assessed. Large F2 populations ranging in size from 2158-2846 individuals were evaluated for herbicide resistance and seedling vigor. Based on the results, F3 lines from the six most vigorous F2 genotypes per cross combination were evaluated for their genetic background. A range of 20%-90% recovery of the recipient parent genome for the carrier chromosome was observed. An effort was made to determine the critical dose of herbicide to distinguish between heterozygotes and homozygotes for the mutant allele. Results suggested that the mutant can survive up to the 10× field recommended dose of herbicide, and the 8× and 10× herbicide doses can distinguish between the two AHAS mutant genotypes. Finally, implications of this research in sustaining barley productivity in the PNW are discussed.
Collapse
Affiliation(s)
- Sachin Rustgi
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Janet Matanguihan
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Jaime H. Mejías
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
- Instituto de Investigaciones Agropecuarias INIA, Vilcún, Chile
| | - Richa Gemini
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Rhoda A. T. Brew-Appiah
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Nuan Wen
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Claudia Osorio
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Nii Ankrah
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Kevin M. Murphy
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
| | - Diter von Wettstein
- Department of Crop & Soil Sciences, Washington State University, Pullman, Washington, United States of America
- School of Molecular Biosciences, Washington State University, Pullman, Washington, United States of America
- Centre for Reproductive Biology, Washington State University, Pullman, Washington, United States of America
| |
Collapse
|