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| Berenschot,Amanda S.; Zucchi,Maria I.; Tulmann-Neto,Augusto; Quecini,Vera. |
| Traditionally, mutagenesis has been used to introduce novel genetic variability in ornamental crops. More recently, it has become a powerful tool in gene discovery and functional analyses in reverse genetics approaches. The present work aimed to compare the efficiency of physical and chemical agents in generating mutant populations of petunia. We have indirectly evaluated the genomic damage by analyzing developmental characteristics of the plantlets derived from treated seeds employing gamma radiation at 0, 20, 40, 60, 80 and 100 Gy and the alkylating agent ethyl-methanesulfonate (EMS) at 0, 0.05, 0.1, 0.15, 0.2 and 0.25% (v/v). Gamma rays and EMS caused developmental defects and decreased seedling viability in plants obtained from the mutagenized seeds.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: EMS; Gamma irradiation; Genomic damage; Mutagenesis; Reverse genetics. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200002 |
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| Coimbra,Jefferson Luís Meirelles; Carvalho,Fernando Irajá Félix de; Oliveira,Antônio Costa de; Silva,José Antônio Gonzalez da; Lorencetti,Claudir. |
| Comparou-se a campo a variabilidade genética em populações de aveia hexaplóide tratadas com agentes mutagênicos físico e químico, através do caráter ciclo vegetativo de plantas. Foram realizados experimentos em duas safras agrícolas em Pelotas, RS, em 1997/98 e 1998/99. As sementes foram irradiadas no Centro Regional de Oncologia da Faculdade de Medicina da UFPel, com uma taxa de dose de 0,25Gy min-1. As doses totais absorvidas para o mutagênico físico foram 100, 200 e 400Gy e, para o mutagênico químico 0,5, 1,5 e 3,0% por tratamento de 1200 sementes aproximadamente, em cada genótipo fixo de aveia avaliado. Foi obtida diferença na eficiência entre os agentes mutagênicos testados. O agente mutagênico físico foi sempre superior em relação ao agente... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avena sativa L.; 60Co; EMS; Ciclo vegetativo; Variabilidade genética. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000100008 |
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| Chang, Hui-Shung (Christie); Kristiansen, Paul. |
| 'Green and clean' has been used as a key marketing tool to promote Australian products overseas. The rationale is that consumers are generally concerned about personal health and the environment and will choose, and pay price premiums, for products that are, or perceived to be, clean (good for them) and green (good for the environment) over alternative products. But is Australia seen as clean and green? Is it really why people buy Australian products? And how effective is it as a marketing tool? This paper attempts to answer some of these questions. The study found that Australia may have a clean green image at present in some of her overseas markets, but to maintain such an image over time, concrete proof of environmental and quality credentials... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Export marketing; Clean and green; EMS; QA; Environmental Economics and Policy; International Relations/Trade. |
| Ano: 2004 |
URL: http://purl.umn.edu/12899 |
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| Chang, Hui-Shung (Christie); Kristiansen, Paul. |
| ‘Clean and green’ has been used as a marketing tool by Australian governments to promote agricultural products overseas. But how valid are these claims? Is the ‘clean and green’ image campaign effective? And should government be involved? We conclude that Australia may have had a ‘clean and green’ image in some markets, but in the future, concrete proof of environmental and quality credentials will be required to satisfy increasingly better-informed and more demanding customers. We argue that governments cannot, and should not, continue to promote Australian products based on an undefined ‘clean and green’ image. Rather, more resources should be directed to the development, promotion and wide adoption of integrated, credible and well-defined environmental... |
| Tipo: Journal Article |
Palavras-chave: Clean and green; EMS; Export marketing; Food production; Food quality; QA; Resource /Energy Economics and Policy. |
| Ano: 2006 |
URL: http://purl.umn.edu/116863 |
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