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| Registros recuperados: 22 | |
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| Dias,Roberto Júnio Pedroso; Bessa,Elisabeth Cristina de Almeida; D'Ávila,Sthefane. |
| The aim of this study was to verify the influence of substrate humidity on desiccation resistance of Subulina octona, continuously exposed, for 48 h, to the temperature of 35 °C. Forty individuals conditioned in 2 plastic boxes, one box containing black earth humidified with 40 ml water and the other one containing dry black earth were used. The retraction of cephalopodal mass inside the shell and the number of dead individuals was evaluated. Snails from dry and humid substrate boxes showed cephalopodal mass retraction of 9.9 cm±2.88 and 2.78 cm±3.17, respectively, after 12 h of exposure; 8.55 cm±1.3 and 6.33 cm±2.91, after 24 h; 11.07 cm±4.19 and 7.27 cm±2.7, after 36 h, 9.12 cm±2.15 and 6.47 cm±2.11, after 48 h. Every individual of dry substrate box died... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land snail; Desiccation; Cephalopodal mass retraction; Substrate; Humidity. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000100016 |
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| Silva,Aline Scheer da; Danielowski,Rodrigo; Braga,Eugenia Jacira Bolacel; Deuner,Sidnei; Magalhães Junior,Ariano Martins de; Peters,Jose Antonio. |
| Techniques used to induce mutations, such as ionizing radiation, are an effective tool in increasing genetic variability in breeding programs of species of economic interest. This study aimed to evaluate the effect of different doses of Co60 gamma radiation on previously soaked seeds on the emergence and early growth of seedlings of two rice cultivars. To do this, seeds (25% moisture) of BRS Querência and BRS Fronteira were irradiated with zero (control), 50, 100, 150 and 200 Gy, and then sown in trays containing soil and kept in a greenhouse. The results showed that gamma radiation affected seedling development, where the highest dose tested (200 Gy) significantly reduced the emergence and the index of emergence speed. Growth parameters were reduced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oryza sativa L; Humidity; Genetic variability. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000600008 |
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| Registros recuperados: 22 | |
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