Dormancy Behaviors and Underlying Regulatory Mechanisms: From Perspective of Pathways to Epigenetic Regulation

Liu, Zongrang; Zhu, Hong; Abbott, Albert G.

doi:10.1007/978-3-319-14451-1_4

Cited by 17 publications

(8 citation statements)

References 162 publications

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“…Epigenetic modifications to DNA and the proteins surrounding and packaging DNA (histones) alter gene expression patterns (active versus inactive genes) but do not affect the DNA sequence-a change in phenotype without a change in genotype. Changes in the expression of histone and DNA modification genes, as well as in the levels and patterns of DNA methylation and histone acetylation, suggest a role for chromatin remodeling in coordinating global changes in gene expression during growth-dormancy cycles [76,77].…”

Section: Genetic and Epigenetic Dormancy Regulationmentioning

confidence: 99%

A Conceptual Framework for Winter Dormancy in Deciduous Trees

et al. 2020

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The perennial life strategy of temperate trees relies on establishing a dormant stage during winter to survive unfavorable conditions. To overcome this dormant stage, trees require cool (i.e., chilling) temperatures as an environmental cue. Numerous approaches have tried to decipher the physiology of dormancy, but these efforts have usually remained relatively narrowly focused on particular regulatory or metabolic processes, recently integrated and linked by transcriptomic studies. This work aimed to synthesize existing knowledge on dormancy into a general conceptual framework to enhance dormancy comprehension. The proposed conceptual framework covers four physiological processes involved in dormancy progression: (i) transport at both whole-plant and cellular level, (ii) phytohormone dynamics, (iii) genetic and epigenetic regulation, and (iv) dynamics of nonstructural carbohydrates. We merged the regulatory levels into a seasonal framework integrating the environmental signals (i.e., temperature and photoperiod) that trigger each dormancy phase.

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Section: Genetic and Epigenetic Dormancy Regulationmentioning

confidence: 99%

A Conceptual Framework for Winter Dormancy in Deciduous Trees

et al. 2020

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“…Comparative mapping of QTL locations of budbreak loci among peach, chestnut, and oak and the availability of whole-genome sequences for each species enabled us to readily surmise that an orthologous genomic region was present in the major budbreak QTL of all three species. This region contains a single MADS-box transcription factor gene in oak and chestnut and a segmentally duplicated gene (six copies in Prunus) that has previously been characterized as a major floral bud dormancy and budbreak control gene in a number of fruiting tree species (Bielenberg et al 2008;Campoy et al 2011;Liu et al 2015) and in at least one fruit tree vegetative budbreak QTL as well (Gabay et al 2018). Combining genomic sequence analyses, comparative QTL analyses and our TajD analyses of LG_L in chestnut, we hypothesize that the DAM gene-containing locus in these deciduous forest tree species is a major control locus for both vegetative and floral budbreak.…”

Section: Castanea Comparative Genomic Analysesmentioning

confidence: 99%

“A reference genome assembly and adaptive trait analysis of Castanea mollissima ‘Vanuxem,’ a source of resistance to chestnut blight in restoration breeding”

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et al. 2020

Tree Genetics & Genomes

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Forest tree species are increasingly subject to severe mortalities from exotic pests, pathogens, and invasive organisms, accelerated by climate change. Such forest health issues are threatening multiple species and ecosystem sustainability globally. One of the most extreme examples of forest ecosystem disruption is the extirpation of the American chestnut (Castanea dentata) caused by the introduction of chestnut blight and root rot pathogens from Asia. Asian species of chestnut are being employed as donors of disease resistance genes to restore native chestnut species in North America and Europe. To aid in the restoration of threatened chestnut species, we present the assembly of a reference genome for Chinese chestnut (C. mollissima) "Vanuxem," one of the donors of disease resistance for American chestnut restoration. From the de novo assembly of the complete genome (725.2 Mb in 14,110 contigs), over half of the sequences have been anchored to the 12 genetic linkage groups. The anchoring is validated by genetic maps and in situ hybridization to chromosomes. We demonstrate the value of the genome as a platform for research and species restoration, including signatures of selection differentiating American chestnut from Chinese chestnut to identify important candidate genes for disease resistance, comparisons of genome organization with other woody species, and a genome-wide examination of progress in backcross breeding for blight resistance. This reference assembly should prove of great value in the understanding, improvement, and restoration of chestnut species.

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“…Comparative mapping of QTL locations of budbreak loci among peach, chestnut and oak and the availability of whole genome sequences for each species enabled us to quickly surmise that an orthologous genomic region of all three species was present in the major budbreak QTL of each species. This region contains a single MADs-box transcription factor gene in oak and chestnut and a segmentally duplicated gene (six copies in Prunus) that has previously been characterized as a major floral bud dormancy and budbreak control gene in a number of fruiting tree species (26,69,70) and in at least one fruit tree vegetative budbreak QTL as well (71). Combining comparative genomic sequence analyses, comparative QTL analyses and our TajD analyses of linkage group L in chestnut, we hypothesize that the DAM gene containing locus in these deciduous forest tree species is a major control locus for both vegetative and floral budbreak and in the case of the DAM gene due to its central importance in regulating the timing of budbreak as seen in fruiting trees, differentially predisposes it to environmental and breeding selection pressures over those other genes in this conserved region.…”

Section: Signatures Of Selection For Bud Burst Qtl Region In Chestnutmentioning

confidence: 99%