Author
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Rowland, Lisa |
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ARORA, RAJEEV - WEST VIRGINIA UNIVERSITY |
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Submitted to: Plant Science
Publication Type: Review Article Publication Acceptance Date: 4/14/1997 Publication Date: N/A Citation: N/A Interpretive Summary: Interpretive Summary is not required for Review Article. Technical Abstract: This review article describes the different recent approaches being taken to identify genes/proteins that are associated with changes in dormancy status in woody perennials and describes the evidence, to date, for each of these genes/proteins playing a causal role in the determination of dormancy status. The discussion is organized based on how the proteins were originally described: as responsive to chill-unit accumulation, photoperiod, general seasonal changes, or rest-breaking treatments such as application of growth-regulating compounds or near-lethal stress. Research to identify proteins related to endodormancy in woody perennials is still in the early stages. However, a few conclusions can be drawn. First, the endodormancy-associated protein level changes that have been identified and characterized thus far generally fall into one of two categories, changes in levels of bark storage proteins or dehydrins. Bark storage proteins play a role in nitrogen storage in the winter and remobilization to support new shoot growth in the spring. Dehydrins appear to be closely associated with changes in cold hardiness levels. The enzyme activity level changes that have been identified as associated with the resumption of growth fall into one or two categories as well, those related to respiratory metabolism changes (from the pentose-phosphate pathway of dormant buds to the glycolytic pathway and TCA cycle of growing buds) and those related to free radical scavenging. |
