Expression of the Populus Orthologues of AtYY1, YIN and YANG Activates the Floral Identity Genes AGAMOUS and SEPALLATA3 Accelerating Floral Transition in Arabidopsis thaliana

Liu, Xinying; Xing, Qian; Liu, Xuemei; Müller-Xing, Ralf

doi:10.3390/ijms24087639

Cited by 3 publications

(1 citation statement)

References 74 publications

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“…The overexpression of AtYY1 in Arabidopsis leads to enhanced root growth and plays an important role in abiotic stresses [ 31 ]. In addition, in recent studies, the expression of two AtYY1 paralogs of P. trichocarpa , YIN and YANG (known as PtYY1a and PtYY1b ), enhanced root growth in Arabidopsis [ 68 ]. In our study, PtrYY1-OE plants promoted lateral root growth and development and increased tolerance to drought stress ( Figure 7 ), indicating that PtrYY1 directly regulates the expression of PtrABR1 to improve drought resistance by promoting lateral root growth; we obtained similar results to those of previous authors.…”

Section: Discussionmentioning

confidence: 99%

PtrABR1 Increases Tolerance to Drought Stress by Enhancing Lateral Root Formation in Populus trichocarpa

Sun,

Dong,

Song

2023

IJMS

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Roots are the main organ for water uptake and the earliest part of a plant’s response to drought, making them of great importance to our understanding of the root system’s response to drought. However, little is known about the underlying molecular mechanisms that control root responses to drought stress. Here, we identified and functionally characterized the AP2/ERF family transcription factor (TF) PtrABR1 and the upstream target gene zinc-finger protein TF PtrYY1, which respond to drought stress by promoting the growth and development of lateral roots in Populus trichocarpa. A root-specific induction of PtrABR1 under drought stress was explored. The overexpression of PtrABR1 (PtrABR1-OE) promoted root growth and development, thereby increasing tolerance to drought stress. In addition, PtrYY1 is directly bound to the promoter of PtrABR1 under drought stress, and the overexpression of PtrYY1 (PtrYY1-OE) promoted lateral root growth and development and increased tolerance to drought stress. An RNA-seq analysis of PtrABR1-OE with wild-type (WT) poplar identified PtrGH3.6 and PtrPP2C44, which share the same pattern of expression changes as PtrABR1. A qRT-PCR and cis-element analysis further suggested that PtrGH3.6 and PtrPP2C44 may act as potential downstream targets of PtrABR1 genes in the root response pathway to drought stress. In conclusion, these results reveal a novel drought regulatory pathway in which PtrABR1 regulates the network through the upstream target gene PtrYY1 and the potential downstream target genes PtrGH3.6 and PtrPP2C44, thereby promoting root growth and development and improving tolerance to drought stress.

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Section: Discussionmentioning

confidence: 99%

PtrABR1 Increases Tolerance to Drought Stress by Enhancing Lateral Root Formation in Populus trichocarpa

Sun,

Dong,

Song

2023

IJMS

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Genome-wide identification of the MADS-box gene family and SEP1 target genes regulating young embryo development in hazel (Corylus spp.) via ChIP sequencing

Cheng,

Ma,

Wei

et al. 2024

Scientia Horticulturae

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Depletion of Gibberellin Signaling Up-Regulates LBD16 Transcription and Promotes Adventitious Root Formation in Arabidopsis Leaf Explants

Jing,

Xing,

Shi

et al. 2024

IJMS

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Adventitious root (AR) formation in plants originates from non-root organs such as leaves and hypocotyls. Auxin signaling is essential for AR formation, but the roles of other phytohormones are less clear. In Arabidopsis, at least two distinct mechanisms can produce ARs, either from hypocotyls as part of the general root architecture or from wounded organs during de novo root regeneration (DNRR). In previous reports, gibberellin acid (GA) appeared to play reverse roles in both types of ARs, since GA treatment blocks etiolation-induced AR formation from hypocotyls, whereas GA synthesis and signaling mutants apparently displayed reduced DNRR from detached leaves. In order to clarify this contradiction, we employed the GA biosynthesis inhibitor paclobutrazol (PBZ) and found that PBZ had positive effects on both types of AR formation in Arabidopsis. Consistently, GA treatment had negative effects on both AR formation mechanisms, while loss of GA synthesis and signaling promoted DNRR under our conditions. Our results show that PBZ treatment can rescue declined AR formation in difficult-to-root leaf explants such as erecta receptor mutants. Furthermore, transcriptional profiling revealed that PBZ treatment altered GA, brassinosteroids, and auxin responses, which included the up-regulation of LBD16 that is well known for its pivotal role in AR initiation.

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Expression of the Populus Orthologues of AtYY1, YIN and YANG Activates the Floral Identity Genes AGAMOUS and SEPALLATA3 Accelerating Floral Transition in Arabidopsis thaliana

Cited by 3 publications

References 74 publications

PtrABR1 Increases Tolerance to Drought Stress by Enhancing Lateral Root Formation in Populus trichocarpa

PtrABR1 Increases Tolerance to Drought Stress by Enhancing Lateral Root Formation in Populus trichocarpa

Genome-wide identification of the MADS-box gene family and SEP1 target genes regulating young embryo development in hazel (Corylus spp.) via ChIP sequencing

Depletion of Gibberellin Signaling Up-Regulates LBD16 Transcription and Promotes Adventitious Root Formation in Arabidopsis Leaf Explants

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