Arabidopsis MADS-Box Transcription Factor AGL21 Acts as Environmental Surveillance of Seed Germination by Regulating ABI5 Expression

Yu, Linhui; Wu, Jie; Zhang, Zisheng; Miao, Zi-Qing; Zhao, Ping‐Xia; Wang, Zhen; Xiang, Cheng‐Bin

doi:10.1016/j.molp.2017.04.004

Cited by 70 publications

(51 citation statements)

References 65 publications

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“…A number of genes have been found to respond to the environmental stresses and regulate seed germination by integrating the environmental signals to ABA signaling (Vishal & Kumar, 2018). In this study, we found that ANR1 , like AGL21 (Yu et al, 2017), also responds to multiple environmental signals, and may act as another environmental surveillance for seed germination. As two members of the AGL17-clade MADS-box genes, ANR1 and AGL21 play similar functions during root development as well as seed germination.…”

Section: Discusstionmentioning

confidence: 64%

“…ANR1 integrates multiple environmental signals and developmental information to determine the proper timing for seed germination by directly regulating ABI3 expression. The ANR1-ABI3 signaling module, together with previously reported AGL21-ABI5 module (Yu et al, 2017), forms a safeguard mechanism that double ensures seeds to germinate at right time and under favorable conditions.…”

Section: Discusstionmentioning

confidence: 99%

“…AGL67 functions as a potential negative regulator of seed germination, for agl67 mutant accelerates the dissolution of seed dormancy (Bassel et al ., 2011). Moreover, the MADS-box transcription factor AGL21 , an important regulator of lateral root development (Yu et al ., 2014), also acts as environmental surveillance of seed germination by regulating ABI5 expression (Yu et al ., 2017).…”

Section: Introdutionmentioning

confidence: 99%

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ARABIDOPSIS NITRATE REGULATED 1 acts as a negative modulator of seed germination by activatingABI3expression

Lin

Xiang

2019

Preprint

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Seed germination is a crucial transition point in plant life and is tightly regulated by environmental conditions through the coordination of two phytohormones, gibberellin and abscisic acid (ABA). To avoid unfavorable conditions, plants have evolved safeguard mechanisms for seed germination. Here, we report a novel function of the Arabidopsis MADS-box transcription factor ARABIDOPSIS NITRATE REGULATED 1 (ANR1) in seed germination. ANR1 knockout mutant is insensitive to ABA, salt, and osmotic stress during the seed germination and early seedling development stages, whereas ANR1-overexpressing lines are hypersensitive. ANR1 is responsive to ABA and abiotic stresses and upregulates the expression of ABI3 to suppress seed germination. ANR1 and ABI3 have similar expression pattern during seed germination. Genetically, ABI3 acts downstream of ANR1. Chromatin immunoprecipitation and yeast-one-hybrid assays showed that ANR1 could bind to the ABI3 promoter to regulate its expression. In addition, ANR1 acts synergistically with AGL21 to suppress seed germination in response to ABA as evidenced by anr1 agl21 double mutant. Taken together, our results demonstrate that the ANR1 plays an important role in regulating seed germination and early post-germination growth. ANR1 and AGL21 together constitutes a safeguard mechanism for seed germination to avoid unfavorable conditions.

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Section: Discusstionmentioning

confidence: 64%

Section: Discusstionmentioning

confidence: 99%

Section: Introdutionmentioning

confidence: 99%

See 1 more Smart Citation

ARABIDOPSIS NITRATE REGULATED 1 acts as a negative modulator of seed germination by activatingABI3expression

Lin

Xiang

2019

Preprint

Self Cite

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“…So far, some genes that positively or negatively regulate ABI5 transcription have been identified. For example, ABI4, HY5, SPT (SPATULA) and AGL21 positively regulate transcription of ABI5 (Chen et al, 2008;Bossi et al, 2009;Vaistij et al, 2013;Yu et al, 2017), and, notably, ABI5 can activate ABI5 expression (Xu et al, 2014). Among them, SPT and ABI5 are able to bind the G-box element in ABI5 promoter, whereas other positive regulators occupy different regions of the ABI5 promoter through other cis elements (Chen et al, 2008;Bossi et al, 2009;Vaistij et al, 2013;Yu et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…For example, ABI4, HY5, SPT (SPATULA) and AGL21 positively regulate transcription of ABI5 (Chen et al, 2008;Bossi et al, 2009;Vaistij et al, 2013;Yu et al, 2017), and, notably, ABI5 can activate ABI5 expression (Xu et al, 2014). Among them, SPT and ABI5 are able to bind the G-box element in ABI5 promoter, whereas other positive regulators occupy different regions of the ABI5 promoter through other cis elements (Chen et al, 2008;Bossi et al, 2009;Vaistij et al, 2013;Yu et al, 2017). Several negative regulators of ABI5 were also identified, including WRKY40, RAV1 (Related to ABI3/VP1), BRM (ATPase BRAHMA) and BBX21 (Shang et al, 2010;Han et al, 2012;Feng et al, 2014;Xu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

The RCC1 family protein SAB1 negatively regulates ABI5 through multidimensional mechanisms during postgermination in Arabidopsis

Wang

Chen

et al. 2019

New Phytologist

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Summary Abscisic acid‐insensitive 5 (ABI5) is an essential and conserved plant basic leucine zipper transcription factor whose level controls seed germination and postgerminative development. It has been demonstrated that activity of ABI5 is transcriptionally and post‐translationally regulated. However, transcriptional regulation of ABI5 is not fully understood. Here, we identified SAB1 (Sensitive to ABA 1) as a novel negative regulator of ABI5 that simultaneously regulates its stability, promoter binding activity and histone methylation‐mediated gene silencing of ABI5. SAB1 encodes a Regulator of Chromatin Condensation 1 (RCC1) family protein and is expressed in an opposite pattern to that of ABI5 during early seedling growth in response to abscisic acid (ABA). SAB1 mutation results in enhanced ABA sensitivity and acts upstream of ABI5. SAB1 physically interacts with ABI5 at phosphoamino acid Ser‐145, and reduces the phosphorylation of ABI5 and the protein stability. SAB1 reduces ABI5 binding activity to its own promoter, leading to reduced transcriptional level of ABI5. SAB1 inactivates ABI5 transcription by increasing the level of histone H3K27me2 in the ABI5 promoter. Our findings have identified SAB1 as a crucial new component of ABA signaling which modulates early development of plant by precisely controlling ABI5 activity through multiple mechanisms.

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The MADS‐Box Gene Family Involved in the Regulatory Mechanism of Dormancy and Flowering in Rosaceae Fruit Trees

Hsiang

Yamane

2021

Annual Plant Reviews Online

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Temperate perennial fruit tree species enter dormancy in autumn. A prolonged exposure to chilling followed by warm conditions induce dormancy release and bud break. In Rosaceae species, flowering proceeds during dormancy when bud growth is repressed. TheSHORT VEGETATIVE PHASE(SVP)‐clade MADS‐box genes such asDORMANCY‐ASSOCIATED MADS‐boxes(DAM/SVPs) encode tree bud dormancy regulators. The major effects of DAM/SVPs include growth inhibition and bud break repression through the regulation of plant hormone metabolism in vegetative and floral buds. In addition, theFLOWERING LOCUS C(FLC)‐clade MADS‐box genes were recently also proposed to encode flowering and dormancy regulators. Apple (Malus domestica) FLC may have multifaceted roles in the juvenile–adult phase transition and in the annual development‐dormancy cycle in floral buds. Specifically, in apple, we hypothesize FLC3‐like may facilitate flowering in autumn, whereas an FLC‐like (FLC2) may inhibit bud break, thereby helping floral buds to remain in a quiescent state in winter and preventing an unexpected bud break before the spring. We developed a working model in which abscisic acid,C‐repeat Binding Factor(CBF),TEOSINTE BRANCHED/CYCLOIDEA/PROLIFERATING CELL FACTOR(TCP), micro ribonucleic acid (microRNAs), and epigenetic regulation mediate processes that convert environmental signals into the transcriptional regulation ofDAMs andFLCs, thereby ensuring dormancy phase transitions and progression. Finally, possible relationships between MADS‐box genes and dormancy‐associated cellular metabolism are discussed.

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Arabidopsis MADS-Box Transcription Factor AGL21 Acts as Environmental Surveillance of Seed Germination by Regulating ABI5 Expression

Cited by 70 publications

References 65 publications

ARABIDOPSIS NITRATE REGULATED 1 acts as a negative modulator of seed germination by activatingABI3expression

ARABIDOPSIS NITRATE REGULATED 1 acts as a negative modulator of seed germination by activatingABI3expression

The RCC1 family protein SAB1 negatively regulates ABI5 through multidimensional mechanisms during postgermination in Arabidopsis

The MADS‐Box Gene Family Involved in the Regulatory Mechanism of Dormancy and Flowering in Rosaceae Fruit Trees

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