Bud Dormancy in Perennial Fruit Trees: Physiological Basis for Dormancy Induction, Maintenance, and Release

Faust, Miklos; Erez, A.; Rowland, Lisa J.; Wang, S.Y.; Norman, H.D.

doi:10.21273/hortsci.32.4.623

Cited by 282 publications

(169 citation statements)

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“…The role of plant-growth regulators during bud dormancy release are not yet clear (Saure 1985;Faust et al 1997;Horvath et al 2002;Olsen 2003). In the present study, most of the genes related to plant-hormone synthesis, signaling and response were downregulated (see discussion in supplementary file S4).…”

Section: Rearrangements In Pyruvate Metabolism and Temporary Inductiomentioning

confidence: 52%

Gene-expression profiling of grape bud response to two alternative dormancy-release stimuli expose possible links between impaired mitochondrial activity, hypoxia, ethylene-ABA interplay and cell enlargement

et al. 2009

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A grape-bud-oriented genomic platform was produced for a large-scale comparative analysis of bud responses to two stimuli of grape-bud dormancy release, hydrogen cyanamide (HC) and heat shock (HS). The results suggested considerable similarity in bud response to the stimuli, both in the repertoire of responding genes and in the temporary nature of the transcriptome reprogramming. Nevertheless, the bud response to HC was delayed, more condensed and stronger, as reflected by a higher number of regulated genes and a higher intensity of regulation compared to the response to HS. Integrating the changes occurring in response to both stimuli suggested perturbation of mitochondrial activity, development of oxidative stress and establishment of a situation that resembles hypoxia, which coincides with induction of glycolysis and fermentation, as well as changes in the interplay between ABA and ethylene metabolism. The latter is known to induce various growth responses in submerged plants and the possibility of a similar mechanism operating in the bud meristem during dormancy release is raised. The new link suggested between sub lethal stress, mitochondrial activity, hypoxic conditions, ethylene metabolism and cell enlargement during bud dormancy release may be instrumental in understanding the dormancy-release mechanism. Temporary increase of acetaldehyde, ethanol and ethylene in response to dormancy release stimuli demonstrated the predictive power of the working model, and its relevance to dormancy release was demonstrated by enhancement of bud break by exogenous ethylene and its inhibition by an ethylene signal inhibitor.

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Section: Rearrangements In Pyruvate Metabolism and Temporary Inductiomentioning

confidence: 52%

Gene-expression profiling of grape bud response to two alternative dormancy-release stimuli expose possible links between impaired mitochondrial activity, hypoxia, ethylene-ABA interplay and cell enlargement

et al. 2009

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“…Its accumulation in woody plants was found to be associated with dormancy and/or seasonal changes . It has been proposed that dehydrins apparently triggered by low temperature and abscisic acid (ABA), bind water, which led to protection against freezing and simultaneous deepening of dormancy (Faust et al 1997). In our experiment, the transcripts of PsDHN up to the peak after bud entering dormancy at stage 4 and then fluctuantly regulated.…”

Section: Psdhn and Pscxementioning

confidence: 61%

Genes associated with the release of dormant buds in tree peonies (Paeonia suffruticosa)

et al. 2008

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A subtractive cDNA library was developed to study genes associated with the release of dormant buds in tree peony. To identify genes that are highly expressed in buds released from dormancy, 588 clones were examined by differential screening and then 185 clones were selected to be sequenced. A total of 31 unique genes were obtained, of which only 25 sequences had matches in the NCBI database or Arabidopsis thaliana protein database while 6 sequences with no matches. Many of the different genes were identified as having unknown or hypothetical functions while others were speculated to have different molecular functions. The expression profiles of the selected ''candidate'' genes which may be associated with dormancy release according to their putative function and previous reports were assessed by northern blot and semiquantitative RT-PCR. The results indicated that the transcriptional expressions of the isolated genes are related to growth regulation and stress response. Our results provide interesting information for further understanding the molecular mechanism of bud dormancy release in tree peony.

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“…Faust et al (1991Faust et al ( , 1997 have reported that proportion of bound water in apple buds increased during development of dormancy and decreased during dormancy release, and that at least part of the bound water is bound to DHN. In the present study, expression of some of the DHN genes (including PaDhn1, PaDhn4.6,PaDhn5,PaDhn6,PaDhn2,and PaDhn3) decreased gradually when approaching Xushing.…”

Section: Expression Of Dhn Genes Of Norway Sprucementioning

confidence: 99%

Dehydrins expression related to timing of bud burst in Norway spruce

Yakovlev¹,

Asante

Fossdal³

et al. 2008

Planta

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Cold deacclimation and preparation to flushing likely requires rehydration of meristems. Therefore, water stress related genes, such as dehydrins (DHN), might play an important role in providing protection during winter dormancy, deacclimation and bud burst timing processes. Here we report the sequence analysis of several Norway spruce DHN identified in late and early flushing suppressive subtraction hybridization cDNA libraries and in our Norway spruce EST database. We obtained 15 cDNAs, representing eight genes from three distinct types of DHN, and studied differential expression of these genes before and during bud burst in spring, using qRT-PCR. We found the visible reduction in transcript level of most DHN towards the bud burst, supported by a significant down-regulation of the DHN in needles during experimental induction of bud burst applied at three time points during autumn in Norway spruce grafts. For most of the DHN transcripts, their expression levels in late-flushing spruces were significantly higher than in the early flushing ones at the same calendar dates but were remarkably similar at the same bud developmental stage. From our results we may conclude that the difference between the early and the late families is in timing of the molecular processes leading to bud burst due to differences in their response to the increasing temperature in the spring. They are induced much earlier in the early flushing families.

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Bud Dormancy in Perennial Fruit Trees: Physiological Basis for Dormancy Induction, Maintenance, and Release

Cited by 282 publications

References 0 publications

Gene-expression profiling of grape bud response to two alternative dormancy-release stimuli expose possible links between impaired mitochondrial activity, hypoxia, ethylene-ABA interplay and cell enlargement

Gene-expression profiling of grape bud response to two alternative dormancy-release stimuli expose possible links between impaired mitochondrial activity, hypoxia, ethylene-ABA interplay and cell enlargement

Genes associated with the release of dormant buds in tree peonies (Paeonia suffruticosa)

Dehydrins expression related to timing of bud burst in Norway spruce

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