A genetic network mediating the control of bud break in hybrid aspen

Singh, Rajesh Kumar; Maurya, Jay P.; Azeez, Abdul; Miskolczi, Pál; Tylewicz, Szymon; Stojkovič, Katja; Delhomme, Nicolas; Busov, Victor; Bhalerao, Rishikesh P.

doi:10.1038/s41467-018-06696-y

Cited by 187 publications

(276 citation statements)

References 55 publications

(82 reference statements)

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“…In addition to the ABA signal, DAM / SVP genes are crucial for the dormancy in many perennial plant species, including pear (Bielenberg et al, ; Niu et al, ; Sasaki et al, ; Singh et al, ; Wu et al, ). Missing DAM genes are responsible for the non‐dormant phenotype of the evergrowing peach mutant and the overexpression of AcSVP2 in kiwifruit enhances bud dormancy (Bielenberg et al, ; Wu et al, ).…”

Section: Discussionmentioning

confidence: 99%

ABA‐responsive ABRE‐BINDING FACTOR3 activatesDAM3expression to promote bud dormancy in Asian pear

Yang

et al. 2020

Plant Cell & Environment

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Bud dormancy is indispensable for the survival of perennial plants in cold winters.Abscisic acid (ABA) has essential functions influencing the endo-dormancy status. Dormancy-associated MADS-box/SHORT VEGETATIVE PHASE-like genes function downstream of the ABA signalling pathway to regulate bud dormancy. However, the regulation of DAM/SVP expression remains largely uncharacterized. In this study, we confirmed that endo-dormancy maintenance and PpyDAM3 expression are controlled by the ABA content in pear (Pyrus pyrifolia) buds. The expression of pear ABRE-BINDING FACTOR3 (PpyABF3) was positively correlated with PpyDAM3 expression. Furthermore, PpyABF3 directly bound to the second ABRE in the PpyDAM3 promoter to activate its expression. Interestingly, both PpyABF3 and PpyDAM3 repressed the cell division and growth of transgenic pear calli. Another ABA-induced ABF protein, PpyABF2, physically interacted with PpyABF3 and disrupted the activation of the PpyDAM3 promoter by PpyABF3, indicating DAM expression was precisely controlled. Additionally, our results suggested that the differences in the PpyDAM3 promoter in two pear cultivars might be responsible for the diversity in the chilling requirements. In summary, our data clarify the finely tuned regulatory mechanism underlying the effect of ABA on DAM gene expression and provide new insights into ABA-related bud dormancy regulation. K E Y W O R D S ABF3, Abscisic acid, bud dormancy, DAM, pear

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Section: Discussionmentioning

confidence: 99%

ABA‐responsive ABRE‐BINDING FACTOR3 activatesDAM3expression to promote bud dormancy in Asian pear

Yang

et al. 2020

Plant Cell & Environment

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“…Research from a wide variety of tree species has yielded other proposed mechanisms for dormancy regulation, including epigenetic regulation of key gene networks through DNA and histone methylation (Lloret et al, 2018). Studies in poplar also support that hormones such as ABA participate in the establishment and release of dormancy (Rinne et al, 2011;Singh et al, 2018;Tylewicz et al, 2018). Low temperature and short photoperiod induce poplar bud dormancy by upregulating ABA signaling, which increases poplar SVL expression Singh et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Distinctive Gene Expression Patterns Define Endodormancy to Ecodormancy Transition in Apricot and Peach

Conrad

Decroocq

et al. 2020

Front. Plant Sci.

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“…NCED3 ) shown to be associated with bud dormancy in several species (Fig. 3i) 32–35 . We also detected the dehydrin coding genes ERD10 , ERD14 and RAB18 , which are induced by ABA and suggested to prevent water dehydration during tree winter dormancy (Fig.…”

Section: Resultsmentioning

confidence: 99%

Flowering behaviour inArabis alpinaensures the maintenance of a perennating dormant bud bank

Vayssières

Mishra

Roggen

et al. 2019

Preprint

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22Arabis alpina, similar to woody perennials, has a complex architecture with a zone of axillary 23 vegetative branches and a zone of dormant buds that serve as perennating organs. We show that 24 floral development during vernalization is the key for shaping the dormant bud zone by 25 facilitating a synchronized and rapid growth after vernalization and thereby causing an increase 26 in auxin response and transport and endogenous indole-3-acetic acid (IAA) levels in the stem. 27 Floral development during vernalization is associated with the development of axillary buds in 28 subapical nodes. Our transcriptome analysis indicated that these buds are not dormant during 29 vernalization but only attain sustained growth after the return to warm temperatures. Floral and 30 subapical vegetative branches grow after vernalization and inhibit the development of the buds 31 below. Dormancy in these buds is regulated across the A. alpina life cycle by low temperatures 32 and by apical dominance in a BRANCHED 1-dependent mechanism. 35Bud dormancy plays an important role in survival through harsh environmental conditions and 36 long-term growth 1 . Thus, during the perennial life cycle, axillary and apical buds transition 37 through the various stages of dormancy before they resume active organogenesis and develop 38 into flowering or vegetative branches 2 . During development the outgrowth of axillary buds 39 close to the shoot apical meristem is repressed by apical dominance, a phenomenon also known 40 as correlative inhibition, latency or paradormancy, which occurs in both annual and perennial 41 species 3,4 . This form of dormancy is not definitive and paradormant buds can resume growth 42 when the main shoot apex is removed 5 . Buds in trees and herbaceous perennials also enter two 43 other forms of dormancy, endo-and eco-dormancy 2 . Endodormancy is regulated by 44 endogenous signals within the bud whereas ecodormancy is imposed by unfavorable 45 environmental conditions 6 . During the life cycle of a perennial plant, apical or axillary buds 46 experience winter in the endodormant state and later become ecodormant so that they will 47 actively grow only during favorable environmental conditions. It is however very common in 48 perennials for branches to have axillary buds during spring and summer, which later on will 49 stay dormant across multiple growing seasons. These dormant buds serve as a backup bud bank 50 and, in case of damage, are used as reservoirs for potential growth facilitating a bet-hedging 51 mechanism 7,8 . Interestingly, dormant buds and actively growing (vegetative or reproductive) 52 axillary branches are organized in zones in a species specific pattern 9,10 . 53The outgrowth of an axillary bud after decapitation involves two phases, firstly the rapid release 54 from dormancy and secondly its sustained growth 11 . Auxin, strigolactones, cytokinin and sugar 55 fine-tune this process by regulating the expression of the TCP transcription factor 56 BRANCHED 1 (BRC1) 12 . Decapitation causes an elev...

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A genetic network mediating the control of bud break in hybrid aspen

Cited by 187 publications

References 55 publications

ABA‐responsive ABRE‐BINDING FACTOR3 activatesDAM3expression to promote bud dormancy in Asian pear

ABA‐responsive ABRE‐BINDING FACTOR3 activatesDAM3expression to promote bud dormancy in Asian pear

Distinctive Gene Expression Patterns Define Endodormancy to Ecodormancy Transition in Apricot and Peach

Flowering behaviour inArabis alpinaensures the maintenance of a perennating dormant bud bank

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