The Arabidopsis bZIP transcription factor family — an update

Dröge‐Laser, Wolfgang; Snoek, L. Basten; Snel, Berend; Weiste, Christoph

doi:10.1016/j.pbi.2018.05.001

Cited by 380 publications

(446 citation statements)

References 133 publications

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“…Additionally, AtABF1 / 4 orthologues were not detected in the pear genome. According to Droge‐Laser et al (), all these proteins have a bZIP domain as well as a conserved N‐terminal region (C1, C2, and C3) (Figure S2c) in which the conserved serine or threonine residues may be phosphorylated by various kinases (Figure S2c).…”

Section: Resultsmentioning

confidence: 99%

“…We also confirmed that PpyABF3 is a bZIP transcription activator (Figure ). A phylogenetic tree indicated that the pear ABF3 is related to the Arabidopsis ABF3, which belongs to the Group A bZIP subfamily along with ABI5 (Droge‐Laser et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…In the ABA signalling pathway, ABA‐responsive element (ABRE)‐binding (AREB) proteins or ABRE‐binding factors (ABFs), including ABF1, AREB1/ABF2, AREB2/ABF4, and ABF3, belong to Group A of the basic leucine zipper (bZIP) family and are key transcription factors that are partly functionally redundant with ABI5 (Droge‐Laser, Snoek, Snel, & Weiste, ; Finkelstein, Gampala, Lynch, Thomas, & Rock, ; Jakoby et al, ). ABA induces the expression of ABF genes and promotes the accumulation of ABF proteins, which further enhance the induction of ABF expression (Wang et al, ).…”

Section: Introductionmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Yang

et al. 2020

Plant Cell & Environment

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“…A RY motif is present in the promoter of AtDOG1, and its transcriptional pattern in seed development indicates that DOG1 is very likely regulated by at least one of above TFs [10]. In the attempt to identify some TF with affinity for the DOG1 promoter, it was perceived in soybean (Glycine max) that bZIP67 is a regulator of several genes involved in SSPs deposition [59]. In other words, DOG1 encodes a plant specific protein with a domain shared by bZIP.…”

Section: Transcription Factors Directly Involved In Dog1 Taskmentioning

confidence: 99%

Delay of Germination-1 (DOG1): A Key to Understanding Seed Dormancy

Carrillo-Barral

Rodríguez-Gacio

Matilla

2020

Plants

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DELAY OF GERMINATION-1 (DOG1), is a master regulator of primary dormancy (PD) that acts in concert with ABA to delay germination. The ABA and DOG1 signaling pathways converge since DOG1 requires protein phosphatase 2C (PP2C) to control PD. DOG1 enhances ABA signaling through its binding to PP2C ABA HYPERSENSITIVE GERMINATION (AHG1/AHG3). DOG1 suppresses the AHG1 action to enhance ABA sensitivity and impose PD. To carry out this suppression, the formation of DOG1-heme complex is essential. The binding of DOG1-AHG1 to DOG1-Heme is an independent processes but essential for DOG1 function. The quantity of active DOG1 in mature and viable seeds is correlated with the extent of PD. Thus, dog1 mutant seeds, which have scarce endogenous ABA and high gibberellin (GAs) content, exhibit a non-dormancy phenotype. Despite being studied extensively in recent years, little is known about the molecular mechanism underlying the transcriptional regulation of DOG1. However, it is well-known that the physiological function of DOG1 is tightly regulated by a complex array of transformations that include alternative splicing, alternative polyadenylation, histone modifications, and a cis-acting antisense non-coding transcript (asDOG1). The DOG1 becomes modified (i.e., inactivated) during seed after-ripening (AR), and its levels in viable seeds do not correlate with germination potential. Interestingly, it was recently found that the transcription factor (TF) bZIP67 binds to the DOG1 promoter. This is required to activate DOG1 expression leading to enhanced seed dormancy. On the other hand, seed development under low-temperature conditions triggers DOG1 expression by increasing the expression and abundance of bZIP67. Together, current data indicate that DOG1 function is not strictly limited to PD process, but that it is also required for other facets of seed maturation, in part by also interfering with the ethylene signaling components. Otherwise, since DOG1 also affects other processes such us flowering and drought tolerance, the approaches to understanding its mechanism of action and control are, at this time, still inconclusive.Plants 2020, 9, 480 2 of 20 (e.g., temperature, O 2 and light) [1][2][3][4]. PD dormancy is a notable agronomic feature. Thus, low levels may produce pre-harvest sprouting, while high levels inhibit the rapid and uniform germination rate. In both cases, there is a reduction of crop production [1,4,5]. PD is established and maintained in the viable dry seed, and throughout several molecular paths (e.g., after-ripening (AR) and exposure to gentle cooling) and can be broken gradually [6,7]. On the other hand, non-dormant seeds of various species have been reported to achieve secondary dormancy (SD) upon exposure to unfavorable conditions for germination [1]. SD occurs essentially after seed dispersal and may be induced by environmental interactions or other special conditions. DELAY OF GERMINATION1 (DOG1), a heme-binding protein, was identified in seeds of A. thaliana by using a biparental recombinant inbred popul...

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“…Among the large number of bZIP transcription factors identified in Arabidopsis thaliana, ABA signal transduction has been extensively studied in group A, which has 13 members [7,8]. Based on phylogenetic analysis, the bZIP proteins with three conservative N-terminal domains can be divided into two categories [9,10].…”

Section: Introductionmentioning

confidence: 99%

Tartary Buckwheat Transcription Factor FtbZIP5, Regulated by FtSnRK2.6, Can Improve Salt/Drought Resistance in Transgenic Arabidopsis

Zhao

Wang

et al. 2020

IJMS

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bZIP transcription factors have been reported to be involved in many different biological processes in plants. The ABA (abscisic acid)-dependent AREB/ABF-SnRK2 pathway has been shown to play a key role in the response to osmotic stress in model plants. In this study, a novel bZIP gene, FtbZIP5, was isolated from tartary buckwheat, and its role in the response to drought and salt stress was characterized by transgenic Arabidopsis. We found that FtbZIP5 has transcriptional activation activity, which is located in the nucleus and specifically binds to ABRE elements. It can be induced by exposure to PEG6000, salt and ABA in tartary buckwheat. The ectopic expression of FtbZIP5 reduced the sensitivity of transgenic plants to drought and high salt levels and reduced the oxidative damage in plants by regulating the antioxidant system at a physiological level. In addition, we found that, under drought and salt stress, the expression levels of several ABA-dependent stress response genes (RD29A, RD29B, RAB18, RD26, RD20 and COR15) in the transgenic plants increased significantly compared with their expression levels in the wild type plants. Ectopic expression of FtbZIP5 in Arabidopsis can partially complement the function of the ABA-insensitive mutant abi5-1 (abscisic acid-insensitive 5-1). Moreover, we screened FtSnRK2.6, which might phosphorylate FtbZIP5, in a yeast two-hybrid experiment. Taken together, these results suggest that FtbZIP5, as a positive regulator, mediates plant tolerance to salt and drought through ABA-dependent signaling pathways.

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The Arabidopsis bZIP transcription factor family — an update

Cited by 380 publications

References 133 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

Delay of Germination-1 (DOG1): A Key to Understanding Seed Dormancy

Tartary Buckwheat Transcription Factor FtbZIP5, Regulated by FtSnRK2.6, Can Improve Salt/Drought Resistance in Transgenic Arabidopsis

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