Free amino acids in the xylem sap of pear trees during dormancy
ABSTRACT: Storage and remobilization are considered key processes for the effective use of nitrogen in temperate fruit trees. As dormancy begins, storage proteins are synthesized, coinciding with a reduction in the levels of free amino acids. Consequently, as dormancy breaks, these storage proteins...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Santa Maria
2016-01-01
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| Series: | Ciência Rural |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016005006101&lng=en&tlng=en |
| _version_ | 1819268308466139136 |
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| author | Anderson Carlos Marafon Flavio Gilberto Herter Fernando José Hawerroth Adriana Neutzling Bierhals |
| author_facet | Anderson Carlos Marafon Flavio Gilberto Herter Fernando José Hawerroth Adriana Neutzling Bierhals |
| author_sort | Anderson Carlos Marafon |
| collection | DOAJ |
| description | ABSTRACT: Storage and remobilization are considered key processes for the effective use of nitrogen in temperate fruit trees. As dormancy begins, storage proteins are synthesized, coinciding with a reduction in the levels of free amino acids. Consequently, as dormancy breaks, these storage proteins are degraded, and an increase in the concentrations of amino acids occurs, in order to support new growth. The objective of this study was to evaluate water content of different vegetative tissues (buds, bark, and bole wood), volume of xylem sap, and free amino acid concentrations of xylem sap, during winter dormancy of Hosui Japanese pear trees (VL). Plant material was obtained from the Embrapa Temperate Climate experimental orchard at Pelotas, in the state of Rio Grande do Sul, Brazil. Xylem sap was extracted from the branches with the aid of a vacuum pump, and the free amino acids were determined by gas chromatography, using the EZ kit: Faast GC/FID (Phenomenex). Water content of buds, as well as the volume of sap and concentrations of both aspartic acid and asparagine, substantially increased over time, reaching maximum values in the phase preceding sprouting. |
| first_indexed | 2024-12-23T21:31:00Z |
| format | Article |
| id | doaj.art-c7b5d9bc12994c8b8cd43b9fa520e23c |
| institution | Directory Open Access Journal |
| issn | 1678-4596 |
| language | English |
| last_indexed | 2024-12-23T21:31:00Z |
| publishDate | 2016-01-01 |
| publisher | Universidade Federal de Santa Maria |
| record_format | Article |
| series | Ciência Rural |
| spelling | doaj.art-c7b5d9bc12994c8b8cd43b9fa520e23c2022-12-21T17:30:27ZengUniversidade Federal de Santa MariaCiência Rural1678-45962016-01-01010.1590/0103-8478cr20131515S0103-84782016005006101Free amino acids in the xylem sap of pear trees during dormancyAnderson Carlos MarafonFlavio Gilberto HerterFernando José HawerrothAdriana Neutzling BierhalsABSTRACT: Storage and remobilization are considered key processes for the effective use of nitrogen in temperate fruit trees. As dormancy begins, storage proteins are synthesized, coinciding with a reduction in the levels of free amino acids. Consequently, as dormancy breaks, these storage proteins are degraded, and an increase in the concentrations of amino acids occurs, in order to support new growth. The objective of this study was to evaluate water content of different vegetative tissues (buds, bark, and bole wood), volume of xylem sap, and free amino acid concentrations of xylem sap, during winter dormancy of Hosui Japanese pear trees (VL). Plant material was obtained from the Embrapa Temperate Climate experimental orchard at Pelotas, in the state of Rio Grande do Sul, Brazil. Xylem sap was extracted from the branches with the aid of a vacuum pump, and the free amino acids were determined by gas chromatography, using the EZ kit: Faast GC/FID (Phenomenex). Water content of buds, as well as the volume of sap and concentrations of both aspartic acid and asparagine, substantially increased over time, reaching maximum values in the phase preceding sprouting.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016005006101&lng=en&tlng=enPyrus pyrifoliaseiva vascularcompostos nitrogenadosbrotação. |
| spellingShingle | Anderson Carlos Marafon Flavio Gilberto Herter Fernando José Hawerroth Adriana Neutzling Bierhals Free amino acids in the xylem sap of pear trees during dormancy Ciência Rural Pyrus pyrifolia seiva vascular compostos nitrogenados brotação. |
| title | Free amino acids in the xylem sap of pear trees during dormancy |
| title_full | Free amino acids in the xylem sap of pear trees during dormancy |
| title_fullStr | Free amino acids in the xylem sap of pear trees during dormancy |
| title_full_unstemmed | Free amino acids in the xylem sap of pear trees during dormancy |
| title_short | Free amino acids in the xylem sap of pear trees during dormancy |
| title_sort | free amino acids in the xylem sap of pear trees during dormancy |
| topic | Pyrus pyrifolia seiva vascular compostos nitrogenados brotação. |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016005006101&lng=en&tlng=en |
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