The DAG1 transcription factor negatively regulates the seed-to-seedling transition in Arabidopsis acting on ABA and GA levels

Boccaccini, Alessandra; Lorrai, Riccardo; Ruta, Veronica; Frey, Anne; Mercey-Boutet, Stephanie; Marion‐Poll, Annie; Tarkowská, Danuše; Strnad, Miroslav; Costantino, Paolo; Vittorioso, Paola

doi:10.1186/s12870-016-0890-5

Cited by 34 publications

(31 citation statements)

References 35 publications

(66 reference statements)

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“…Genome-wide analysis of the chromatin state of wild-type and fie seedlings revealed a number of DOF genes (Table 3) as putative targets of PRC2 [108]. Further studies on one of these, DAG1, showed that in developing seedlings, its transcribed region is significantly enriched in the H3K27me3 repressive mark [74]. Interestingly, among the DOF genes marked by H3K27me3, PEAR genes were also found, consistent with their master role during vascular development and root radial growth.…”

Section: Dof In Early Steps Of Arabidopsis Developmentmentioning

confidence: 73%

“…In addition, dag1 mutant seeds require about a ten times lower GA concentration than wild-type to reach 50% germination [72]. DAG1 acts in the phyB-mediated pathway, downstream of PIF1, and it controls the ABA/GA ratio by repressing the GA biosynthetic gene GA3ox1 and the ABA catabolic gene CYP707A2 [73,74]. 2) interacts with the DELLA protein RGL2.…”

Section: Interaction Dof-della Represses Seed Germinationmentioning

confidence: 99%

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The DOF Transcription Factors in Seed and Seedling Development

Ruta

Longo

Lepri

et al. 2020

Plants

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The DOF (DNA binding with one finger) family of plant-specific transcription factors (TF) was first identified in maize in 1995. Since then, DOF proteins have been shown to be present in the whole plant kingdom, including the unicellular alga Chlamydomonas reinhardtii. The DOF TF family is characterised by a highly conserved DNA binding domain (DOF domain), consisting of a CX 2 C-X 21 -CX 2 C motif, which is able to form a zinc finger structure. Early in the study of DOF proteins, their relevance for seed biology became clear. Indeed, the PROLAMIN BINDING FACTOR (PBF), one of the first DOF proteins characterised, controls the endosperm-specific expression of the zein genes in maize. Subsequently, several DOF proteins from both monocots and dicots have been shown to be primarily involved in seed development, dormancy and germination, as well as in seedling development and other light-mediated processes. In the last two decades, the molecular network underlying these processes have been outlined, and the main molecular players and their interactions have been identified. In this review, we will focus on the DOF TFs involved in these molecular networks, and on their interaction with other proteins.

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Section: Dof In Early Steps Of Arabidopsis Developmentmentioning

confidence: 73%

Section: Interaction Dof-della Represses Seed Germinationmentioning

confidence: 99%

The DOF Transcription Factors in Seed and Seedling Development

Ruta

Longo

Lepri

et al. 2020

Plants

Self Cite

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“…These transcriptional regulators participate in plant growth, development and other processes, including biotic and abiotic stress responses (Yanagisawa, ; Gabriele et al ., ; Noguero et al ., ; Renau‐Morata et al ., ; Rymen et al ., ; Zang et al ., ). Under most conditions, the roles of DOF proteins in these physiological processes involve plant hormones (Gabriele et al ., ; Boccaccini et al ., ; Rymen et al ., ; Huang et al ., ). Ethylene is a crucial, simple gaseous phytohormone (Achard et al ., ; Van de Poel et al ., ) whose biosynthesis is highly regulated at the transcriptional and post‐transcriptional levels (Argueso et al ., ; Yoon, ; Lee & Yoon, ).…”

Section: Discussionmentioning

confidence: 97%

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

et al. 2019

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Summary In early seedlings, the primary root adapts rapidly to environmental changes through the modulation of endogenous hormone levels. The phytohormone ethylene inhibits primary root elongation, but the underlying molecular mechanism of how ethylene‐reduced root growth is modulated in environmental changes remains poorly understood. Here, we show that a novel rice (Oryza sativa) DOF transcription factor OsDOF15 positively regulates primary root elongation by regulating cell proliferation in the root meristem, via restricting ethylene biosynthesis. Loss‐of‐function of OsDOF15 impaired primary root elongation and cell proliferation in the root meristem, whereas OsDOF15 overexpression enhanced these processes, indicating that OsDOF15 is a key regulator of primary root elongation. This regulation involves the direct interaction of OsDOF15 with the promoter of OsACS1, resulting in the repression of ethylene biosynthesis. The control of ethylene biosynthesis by OsDOF15 in turn regulates cell proliferation in the root meristem. OsDOF15 transcription is repressed by salt stress, and OsDOF15‐mediated ethylene biosynthesis plays a role in inhibition of primary root elongation by salt stress. Thus, our data reveal how the ethylene‐inhibited primary root elongation is finely controlled by OsDOF15 in response to environmental signal, a novel mechanism of plants responding to salt stress and transmitting the information to ethylene biosynthesis to restrict root elongation.

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“…Recent studies have shown that the functions of Dof proteins are associated with plant hormones (Washio ; Mena et al ; Moreno‐Risueno et al ; Rueda‐Romero et al ; Boccaccini et al ; Wu et al ; Boccaccini et al ). For example, OsDof3 plays a regulatory role in gibberellin signaling during germination (Washio ), and OsDof12 participates in BR signaling to modulate rice architecture (Wu et al ).…”

Section: Discussionmentioning

confidence: 99%

Short Panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice

Huang

Bai

Luo

et al. 2019

JIPB

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Inflorescence architecture is a major determinant of spikelet numbers per panicle, a key component of grain yield in rice. In this study, Short Panicle 3 (SP3) was identified from a short panicle 3 (sp3) mutant in which T‐DNA was inserted in the promoter of SP3, resulting in a knockdown mutation. SP3 encodes a DNA binding with one finger (Dof) transcriptional activator. Quantitative real time (qRT)‐PCR and RNA in situ hybridization assays confirmed that SP3 is preferentially expressed in the young rice inflorescence, specifically in the branch primordial regions. SP3 acts as a negative regulator of inflorescence meristem abortion by upregulating APO2/RFL. SP3 both up‐ and downregulates expression of genes involved in cytokinin biosynthesis and catabolism, respectively. Consequently, cytokinin concentrations are decreased in young sp3 panicles, thereby leading to small panicles having fewer branches and spikelets. Our findings support a model in which SP3 regulates panicle architecture by modulating cytokinin homeostasis. Potential applications to rice breeding, through gene‐editing of the SP3 promoter are assessed.

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The DAG1 transcription factor negatively regulates the seed-to-seedling transition in Arabidopsis acting on ABA and GA levels

Cited by 34 publications

References 35 publications

The DOF Transcription Factors in Seed and Seedling Development

The DOF Transcription Factors in Seed and Seedling Development

Rice OsDOF15 contributes to ethylene‐inhibited primary root elongation under salt stress

Short Panicle 3 controls panicle architecture by upregulating APO2/RFL and increasing cytokinin content in rice

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