BRASSINOSTEROID INSENSITIVE2 Interacts with ABSCISIC ACID INSENSITIVE5 to Mediate the Antagonism of Brassinosteroids to Abscisic Acid during Seed Germination in<i>Arabidopsis</i>

Hu, Yanru; Yu, Diqiu

doi:10.1105/tpc.114.130849

Cited by 256 publications

(206 citation statements)

References 82 publications

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“…Finally, it is worthy of attention the fact that heat stress clearly down-regulated gene expression of all ZmBZRs analysed. We speculate that this apparently contrasting result might be explained by considering the antagonistic interaction between BRs and ABA in regulating, for example, seed germination and dormancy during embryo maturation (Hu and Yu 2014). More consistently with our results, it has been demonstrated that high endogenous levels of ABA suppress BR-mediated responses in plant (Divi et al 2010).…”

Section: Discussionsupporting

confidence: 78%

Identification and characterization of the BZR transcription factor family and its expression in response to abiotic stresses in Zea mays L.

et al. 2017

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Brassinosteroids (BRs) are plant specific steroidal hormones that play diverse roles in regulating a broad spectrum of plant growth and developmental processes, as well as, in responding to various biotic and abiotic stresses. Extensive research over the years has established stress-impact-mitigating role of BRs and associated compounds in different plants exposed to various abiotic and biotic stresses, suggesting the idea that they may act as immunomodulators, thus opening new approaches for plant resistance against hazardous environmental conditions. In this research the characterization of the transcriptional response of 11 transcription factors (TFs) belonging to BRASSINAZOLE-RESISTANT 1 (BZR1) TF family of Zea mays L. was analyzed in seedlings subjected to different stress conditions. Being important regulators of the BR synthesis, BZR TFs might have stress resistance related activities. However, no stress resistance related functional study of BZR TFs has been reported in maize so far. In silico analyses of the selected 11 TFs validated the features of their protein domains, where the highest degree of similarity observed with recognized BZR TFs of rice and Sorghum bicolor. Additionally, we investigated the organ-specific expression of 11 ZmBZR in maize seedlings. Five of them did not show any transcript accumulation, suggesting that ZmBZR expression might be regulated in a manner dependent on plant developmental stage. For the remaining six ZmBZR, their ubiquitous expression in the whole plant indicates they could function as growth regulators during maize development. More importantly, in response to various stress conditions, the spatial transcript accumulation of all ZmBZR varies along the plant. All six ZmBZR showed up-regulation against N starvation, hypoxia and salt stress. On the contrary, heat stress clearly down-regulated gene expression of all ZmBZR analysed. Consistently with the expression results, the distribution of stress-related cis-acting elements in the promoter of these genes inferred that the maize BZR TFs might play some roles in regulating the expression of the corresponding genes in response to multifarious stresses. In conclusion, these data reveal that BZR TFs have stress signaling activity in maize, in addition to their confirmed role in regulating plant physiology and morphology.

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Section: Discussionsupporting

confidence: 78%

Identification and characterization of the BZR transcription factor family and its expression in response to abiotic stresses in Zea mays L.

et al. 2017

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“…In the network analysis, the hub genes encoding phosphorylation related enzymes in BR (BIN2s) and ABA (PP2Cs) signaling were found closely connected with each other. Coincidently, the antagonism of BR and ABA mediated by BIN2 has been recently evidenced in Arabidopsis seed germination [29]. Taken together, we speculated that BR could promote seed germination partly through the phosphorylation-mediated counteraction to ABA in both dicots and monocots.…”

Section: Discussionmentioning

confidence: 90%

An integrated RNA-Seq and network study reveals a complex regulation process of rice embryo during seed germination

Wei

Tan

et al. 2015

Biochemical and Biophysical Research Communications

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“…Yeast two-hybrid assay was performed as described previously (Hu and Yu, 2014). Primers used for generating various clones for yeast two-hybrid assays are listed in Supplemental Table S1.…”

Section: Yeast Two-hybrid Assaymentioning

confidence: 99%

The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering

et al. 2016

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Gibberellin (GA) and photoperiod pathways have recently been demonstrated to collaboratively modulate flowering under long days (LDs). However, the molecular mechanisms underlying this collaboration remain largely unclear. In this study, we found that GA-induced expression of FLOWERING LOCUS T (FT) under LDs was dependent on CONSTANS (CO), a critical transcription factor positively involved in photoperiod signaling. Mechanistic investigation revealed that DELLA proteins, a group of crucial repressors in GA signaling, physically interacted with CO. The DELLA-CO interactions repressed the transcriptional function of CO protein. Genetic analysis demonstrated that CO acts downstream of DELLA proteins to regulate flowering. Disruption of CO rescued the earlier flowering phenotype of the gai-t6 rga-t2 rgl1-1 rgl2-1 mutant (dellap), while a gain-of-function mutation in GA INSENSITIVE (GAI, a member of the DELLA gene) repressed the earlier flowering phenotype of CO-overexpressing plants. In addition, the accumulation of DELLA proteins and mRNAs was rhythmic, and REPRESSOR OF GA1-3 protein was noticeably decreased in the long-day afternoon, a time when CO protein is abundant. Collectively, these results demonstrate that the DELLA-CO cascade inhibits CO/FT-mediated flowering under LDs, which thus provide evidence to directly integrate GA and photoperiod signaling to synergistically modulate flowering under LDs.

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BRASSINOSTEROID INSENSITIVE2 Interacts with ABSCISIC ACID INSENSITIVE5 to Mediate the Antagonism of Brassinosteroids to Abscisic Acid during Seed Germination inArabidopsis

Cited by 256 publications

References 82 publications

Identification and characterization of the BZR transcription factor family and its expression in response to abiotic stresses in Zea mays L.

Identification and characterization of the BZR transcription factor family and its expression in response to abiotic stresses in Zea mays L.

An integrated RNA-Seq and network study reveals a complex regulation process of rice embryo during seed germination

The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering

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