| Revista: | Scientia agricola |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000359327 |
| ISSN: | 0103-9016 |
| Autores: | Marafon, Anderson Carlos1 Citadin, Idemir2 Amarante, Luciano do3 Herter, Flavio Gilberto4 Hawerroth, Fernando Jose5 |
| Instituciones: | 1Empresa Brasileira de Pesquisa Agropecuaria, Tabuleiros Costeiros, Rio Largo, Alagoas. Brasil 2Universidade Tecnologica Federal do Parana, Pato Branco, Parana. Brasil 3Universidade Federal de Pelotas, Instituto de Quimica e Geociencias, Pelotas, Rio Grande do Sul. Brasil 4Universidade Federal de Pelotas, Faculdade de Agronomia Eliseu Maciel, Pelotas, Rio Grande do Sul. Brasil 5Empresa Brasileira de Pesquisa Agropecuaria, Agroindustria Tropical, Fortaleza, Ceara. Brasil |
| Año: | 2011 |
| Periodo: | Jul-Ago |
| Volumen: | 68 |
| Número: | 4 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, analítico |
| Resumen en portugués | The flower bud abortion is one of the main problems that limit commercial pear (Pyrus pyrifolia) production in the southern region of Brazil. Insufficient chilling during the dormancy period is known as the main factor of this problem. One of the hypotheses to explain this problem is that the starch mobilization and carbohydrate fluxes to the buds are impeded when mild temperatures occurred during winter. This study compared the total soluble sugars (TSS) and reducing sugars (RS) concentrations, the cell wall acid invertase (CWAI - EC 3.2.1.26) and sucrose-phosphate synthase (SPS - EC 2.4.1.14) activities in wood of branches and floral buds of Japanese pear trees cv. Housui, grafted on Pyrus calleryana and submitted to chilling conditions during the dormancy period. Treatments were: (i) natural conditions; (ii) continuous artificial chilling; (iii) alternating temperatures, and (iv) total chilling privation. TSS and RS contents, as well as CWAI and SPS activities in tissues of branches that received insufficient chilling were lower than those that received sufficient chilling during winter. The starch concentration was superior in wood tissues of branches kept under chilling privation. The chilling privation disturbs carbohydrate mobilization in pear trees, reducing the sucrose synthesis capacity in wood tissues (source) and sucrose importation by the floral buds (sink) |
| Disciplinas: | Agrociencias |
| Palabras clave: | Frutales, Química, Fitoquímica, Pera, Pyrus pyrifolia, Yemas florales, Carbohidratos, Pared celular, Latencia |
| Keyword: | Agricultural sciences, Fruit trees, Phytochemistry, Pear tree, Pyrus pyrifolia, Flower buds, Carbohydrates, Cell wall, Dormancy, Chemistry |
| Texto completo: | Texto completo (Ver HTML) |
