The antagonistic regulation of abscisic acid‐inhibited root growth by brassinosteroids is partially mediated via direct suppression of <i>ABSCISIC ACID INSENSITIVE 5</i> expression by BRASSINAZOLE RESISTANT 1

Yang, Xiaorui; Bai, Yang; Shang, Jian‐Xiu; Xin, Ruijiao; Tang, Wenqiang

doi:10.1111/pce.12763

Cited by 85 publications

(60 citation statements)

References 36 publications

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“…Because ABA production is induced during drought stress to promote stress tolerance (Cutler et al, 2010), these observations point toward a close relationship between BR and ABA pathways (Zhang et al, 2009b). Indeed, the molecular basis for BR-ABA antagonism has been extensively defined, ranging from interactions between downstream TFs such as BES1 and ABI3 or ABI5 (Ryu et al, 2014;Yang et al, 2016) to BIN2 kinase, a negative regulator of the BR signaling pathway that becomes activated in the presence of ABA (Wang et al, 2018a). BIN2 phosphorylates and promotes the activity of positive regulators in the ABA pathway including SnRK2 kinases (Cai et al, 2014) and TFs such as ABI5 (Hu and Yu, 2014).…”

Section: Br and Aba Pathways Antagonize One Anothermentioning

confidence: 99%

Brassinosteroids: Multidimensional Regulators of Plant Growth, Development, and Stress Responses

et al. 2019

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Brassinosteroids (BRs) are a group of polyhydroxylated plant steroid hormones that are crucial for many aspects of a plant's life. BRs were originally characterized for their function in cell elongation, but it is becoming clear that they play major roles in plant growth, development, and responses to several stresses such as extreme temperatures and drought. A BR signaling pathway from cell surface receptors to central transcription factors has been well characterized. Here, we summarize recent progress toward understanding the BR pathway, including BR perception and the molecular mechanisms of BR signaling. Next, we discuss the roles of BRs in development and stress responses. Finally, we show how knowledge of the BR pathway is being applied to manipulate the growth and stress responses of crops. These studies highlight the complex regulation of BR signaling, multiple points of crosstalk between BRs and other hormones or stress responses, and the finely tuned spatiotemporal regulation of BR signaling.

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Section: Br and Aba Pathways Antagonize One Anothermentioning

confidence: 99%

Brassinosteroids: Multidimensional Regulators of Plant Growth, Development, and Stress Responses

et al. 2019

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“…Yang et al (2016) showed that bzr1-1D , a dominant mutant with enhanced BR signaling, was less sensitive to ABA-inhibited primary root growth. ABA INSENSITIVE5 (ABI5) was found to be repressed not only by exogenously applied BR but also by BZR1 itself.…”

Section: Abi5 As the Integrator Of Aba And Other Phytohormone Signalimentioning

confidence: 99%

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

2016

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ABA Insensitive 5 (ABI5) is a basic leucine zipper transcription factor that plays a key role in the regulation of seed germination and early seedling growth in the presence of ABA and abiotic stresses. ABI5 functions in the core ABA signaling, which is composed of PYR/PYL/RCAR receptors, PP2C phosphatases and SnRK2 kinases, through the regulation of the expression of genes that contain the ABSCISIC ACID RESPONSE ELEMENT (ABRE) motif within their promoter region. The regulated targets include stress adaptation genes, e.g., LEA proteins. However, the expression and activation of ABI5 is not only dependent on the core ABA signaling. Many transcription factors such as ABI3, ABI4, MYB7 and WRKYs play either a positive or a negative role in the regulation of ABI5 expression. Additionally, the stability and activity of ABI5 are also regulated by other proteins through post-translational modifications such as phosphorylation, ubiquitination, sumoylation and S-nitrosylation. Moreover, ABI5 also acts as an ABA and other phytohormone signaling integrator. Components of auxin, cytokinin, gibberellic acid, jasmonate and brassinosteroid signaling and metabolism pathways were shown to take part in ABI5 regulation and/or to be regulated by ABI5. Monocot orthologs of AtABI5 have been identified. Although their roles in the molecular and physiological adaptations during abiotic stress have been elucidated, knowledge about their detailed action still remains elusive. Here, we describe the recent advances in understanding the action of ABI5 in early developmental processes and the adaptation of plants to unfavorable environmental conditions. We also focus on ABI5 relation to other phytohormones in the abiotic stress response of plants.

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“…BRASSINOSTEROID INSENSITIVE2 (BIN2), a GSK3-like kinase in the brassinosteroid (BR) signaling pathway, was shown to phosphorylate and stabilize ABI5 during seed germination. By contrast, the BRASSINAZOLE RESISTANT 1 (BZR1) transcription factor could suppress ABI5 expression during root growth (Hu & Yu, 2014;Yang et al, 2016). Interestingly, BRINSENSITIVE1 (BRI1)-EMS-SUPPRESSOR1 (BES1), another key transcription factor in the BR signaling pathway, but not BZR1, is a major contributor to BR-mediated suppression of ABA signaling during seed germination (Ryu et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

BES1 hinders ABSCISIC ACID INSENSITIVE5 and promotes seed germination in Arabidopsis

et al. 2018

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Proper regulation of seed germination is essential for the successful propagation of a plant. The transcription factor ABSCISIC ACID INSENSITIVE5 (ABI5) of the abscisic acid (ABA) signaling pathway plays a central role in the inhibition of seed germination. ABI5 is precisely regulated by the core ABA signaling components and multiple other factors. However, the complex regulatory network of ABI5 remains largely unknown. In this study, we determined the biochemical interaction between ABI5 and the BRINSENSITIVE1 (BRI1)-EMS-SUPPRESSOR1 (BES1) transcription factor of the brassinosteroid (BR) signaling pathway, as well as the function of BES1 regulating ABI5 during seed germination in Arabidopsis. BES1 directly interacts with ABI5 both in vitro and in vivo. The bZIP domain of ABI5, which is responsible for DNA binding, is critical for ABI5 binding to BES1. The interaction of BES1 with ABI5 significantly suppressed the binding of ABI5 to the promoter regions of downstream genes, which resulted in their reduced expression and consequently facilitated seed germination. This study shed new light on the coordination of multiple signaling pathways during seed germination. In particular, BES1 directly binds to ABI5, which interferes with its transcriptional activity and suppresses ABA signaling output.

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The antagonistic regulation of abscisic acid‐inhibited root growth by brassinosteroids is partially mediated via direct suppression of ABSCISIC ACID INSENSITIVE 5 expression by BRASSINAZOLE RESISTANT 1

Cited by 85 publications

References 36 publications

Brassinosteroids: Multidimensional Regulators of Plant Growth, Development, and Stress Responses

Brassinosteroids: Multidimensional Regulators of Plant Growth, Development, and Stress Responses

The Role and Regulation of ABI5 (ABA-Insensitive 5) in Plant Development, Abiotic Stress Responses and Phytohormone Crosstalk

BES1 hinders ABSCISIC ACID INSENSITIVE5 and promotes seed germination in Arabidopsis

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