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In the present study, PeSTZ1, a Cysteine-2/Histidine-2 type zinc-finger transcription factor, was isolated from the desert poplar, Populus euphratica, which serves as a model stress adaptation system for trees. PeSTZ1 was preferentially expressed in the young stems and was significantly upregulated during chilling and freezing treatments. PeSTZ1 was localized to the nucleus and bound specifically to the PeAPX2 promoter. To examine the potential functions of PeSTZ1, we overexpressed it in poplar 84K hybrids (Populus alba × Populus glandulosa), which are known to be stress-sensitive. Upon exposure to freezing stress, transgenic poplars maintained higher photosynthetic activity and dissipated more excess light energy (in the form of heat) than wild type poplars. Thus, PeSTZ1 functions as a transcription activator to enhance freezing tolerance without sacrificing growth. Under freezing stress, PeSTZ1 acts upstream of ASCORBATE PEROXIDASE2 (PeAPX2) and directly regulates its expression by binding to its promoter. Activated PeAPX2 promotes cytosolic APX that scavenges reactive oxygen species (ROS) under cold stress. PeSTZ1 may operate in parallel with C-REPEAT-BINDING FACTORS to regulate COLD-REGULATED gene expression. Moreover, PeSTZ1 upregulation reduces malondialdehyde and ROS accumulation by activating the antioxidant system. Taken together, these results suggested that overexpressing PeSTZ1 in 84K poplar enhances freezing tolerance through the modulation of ROS scavenging via the direct regulation of PeAPX2 expression. This article is protected by copyright. All rights reserved.
This article was published in the following journal.
Name: Plant biotechnology journal
Phenotypic switching of vascular smooth muscle cells (VSMC) plays a vital role in the development of vascular diseases. All-trans retinoic acid (ATRA) is known to regulate VSMC phenotypes. However, th...
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B-cell lymphoma/leukaemia 11A (BCL11A) is a C2H2-type zinc-finger transcription factor protein that is a critical modulator of haemoglobin switching and suppresses the production of foetal haemoglobin...
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Assessment of the impact of oral Human Milk Oligosaccharides (HMO) application on acute diarrhoea and the development of prolonged and persistent diarrhoea in paediatric patients hospitali...
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Endolymphatic Sac Tumors in a Population of Patients With Von Hippel-Lindau Disease:The Natural History and Pathobiology, and a Prospective Non-Randomized Clinical Trial of Hearing Preservation Surgery in Patients With Early Stage Endolymphatic Sac Tumors
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Study Design: Randomized Single Blind Study Objective: To determine the dose relationship of DWP 450 for finger flexor spasticity Subjects: 78 patients with upper extremity spasticity afte...
Ewing sarcoma is characterized by genomic rearrangements resulting in over-expression of ets family transcription factors driving tumor progression. TK216 is designed to inhibit this effec...
One of several general transcription factors that are specific for RNA POLYMERASE III. It is a zinc finger (ZINC FINGERS) protein and is required for transcription of 5S ribosomal genes.
A ZINC FINGER MOTIF containing transcription factor that was originally identified as one of the IMMEDIATE-EARLY PROTEINS. It shuttles between the CYTOPLASM and the CELL NUCLEUS and is involved in destabilization of mRNAs for TUMOR NECROSIS FACTOR-ALPHA.
A family of zinc finger transcription factors that share homology with Kruppel protein, Drosophila. They contain a highly conserved seven amino acid spacer sequence in between their ZINC FINGER MOTIFS.
An Sp transcription factor that contains three CYS2-HIS2 ZINC FINGERS. It binds to GC RICH SEQUENCES and performs an essential function in regulating gene expression for differentiation of OSTEOBLASTS. Mutations in the SP7 gene are associated with type 12 OSTEOGENESIS IMPERFECTA.
A transcription factor that consists of 8 CYS2-HIS2 ZINC FINGERS flanking a central HOMEOBOX. It binds to the 5'-CACCT-3' DNA sequence located within E-BOX ELEMENTS of many genes essential for embryonic growth and development and regulates their activity; it represses transcription of the E-CADHERIN gene. Mutations in the ZEB2 gene are associated with MOWAT-WILSON SYNDROME.
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Genetic engineering is the process of manually adding new DNA to an organism. The goal is to add one or more new traits that are not already found in that organism. Examples of genetically engineered (transgenic) organisms currently on the market include...