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Zhang Y, Yin K, Yao J, Zhao Z, Liu Z, Yan C, Zhang Y, Liu J, Li J, Zhao N, Zhao R, Zhou X, Chen S. Populus euphratica GLABRA3 Binds PLDδ Promoters to Enhance Salt Tolerance. Int J Mol Sci 2023; 24:ijms24098208. [PMID: 37175914 PMCID: PMC10179125 DOI: 10.3390/ijms24098208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 04/25/2023] [Accepted: 04/29/2023] [Indexed: 05/15/2023] Open
Abstract
High NaCl (200 mM) increases the transcription of phospholipase Dδ (PLDδ) in roots and leaves of the salt-resistant woody species Populus euphratica. We isolated a 1138 bp promoter fragment upstream of the translation initiation codon of PePLDδ. A promoter-reporter construct, PePLDδ-pro::GUS, was introduced into Arabidopsis plants (Arabidopsis thaliana) to demonstrate the NaCl-induced PePLDδ promoter activity in root and leaf tissues. Mass spectrometry analysis of DNA pull-down-enriched proteins in P. euphratica revealed that PeGLABRA3, a basic helix-loop-helix transcription factor, was the target transcription factor for binding the promoter region of PePLDδ. The PeGLABRA3 binding to PePLDδ-pro was further verified by virus-induced gene silencing, luciferase reporter assay (LRA), yeast one-hybrid assay, and electrophoretic mobility shift assay (EMSA). In addition, the PeGLABRA3 gene was cloned and overexpressed in Arabidopsis to determine the function of PeGLABRA3 in salt tolerance. PeGLABRA3-overexpressed Arabidopsis lines (OE1 and OE2) had a greater capacity to scavenge reactive oxygen species (ROS) and to extrude Na+ under salinity stress. Furthermore, the EMSA and LRA results confirmed that PeGLABRA3 interacted with the promoter of AtPLDδ in transgenic plants. The upregulated AtPLDδ in PeGLABRA3-transgenic lines resulted in an increase in phosphatidic acid species under no-salt and saline conditions. We conclude that PeGLABRA3 activated AtPLDδ transcription under salt stress by binding to the AtPLDδ promoter region, conferring Na+ and ROS homeostasis control via signaling pathways mediated by PLDδ and phosphatidic acid.
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Affiliation(s)
- Ying Zhang
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Kexin Yin
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jun Yao
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Ziyan Zhao
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Zhe Liu
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Caixia Yan
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Yanli Zhang
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jian Liu
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Jing Li
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Nan Zhao
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Rui Zhao
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Xiaoyang Zhou
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Shaoliang Chen
- Key Laboratory of Forest and Flower Genetics and Breeding of Ministry of Education, College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China
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Iqbal S, Ali U, Fadlalla T, Li Q, Liu H, Lu S, Guo L. Genome wide characterization of phospholipase A & C families and pattern of lysolipids and diacylglycerol changes under abiotic stresses in Brassica napus L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 147:101-112. [PMID: 31855816 DOI: 10.1016/j.plaphy.2019.12.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 06/10/2023]
Abstract
Plant phospholipase A (PLA) and C (PLC) families are least explored in terms of structure, diversity and their roles in membrane lipid remodeling under stress conditions. In this study, we performed gene family analysis, determined gene expression in different tissues and monitored transcriptional regulation of patatin-related PLA family and PLC family in oil crop Brassica napus under dehydration, salt, abscisic acid and cold stress. The identified 29 BnapPLA genes and 40 BnaPLC genes shared high similarities with Arabidopsis pPLAs and PLCs, respectively. This study highlighted the expression pattern of BnapPLAs and BnaPLCs in different tissues and their expression in response to abiotic stresses in Brassica napus. The results revealed that several members of BnapPLA3, PI-PLC1/2 and NPC1 were actively regulated by abiotic stresses. Lipid changes at different time points under stress conditions were also measured. Lipid profiling revealed that the level of lysophospholipids and diacylglycerol (DAG) showed a varied pattern of changes under different abiotic stress treatments. The change of lipids correlated with the transcriptional regulation of a few specific members of pPLA and PLC families. Our study suggested that A and C-type phospholipases in Brassica napus may have diverse physiological and regulatory roles in abiotic stress response and tolerance.
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Affiliation(s)
- Sidra Iqbal
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China; Department of Agriculture, University of Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan
| | - Usman Ali
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Tarig Fadlalla
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Qing Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Hongbo Liu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
| | - Shaoping Lu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China.
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Lu S, Fadlalla T, Tang S, Li L, Ali U, Li Q, Guo L. Genome-Wide Analysis of Phospholipase D Gene Family and Profiling of Phospholipids under Abiotic Stresses in Brassica napus. PLANT & CELL PHYSIOLOGY 2019; 60:1556-1566. [PMID: 31073607 DOI: 10.1093/pcp/pcz071] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 04/06/2019] [Indexed: 05/28/2023]
Abstract
Oil crop Brassica napus is subjected to environmental stresses such as drought, cold and salt. Phospholipase Ds (PLDs) have vital roles in regulation of plant growth, development and stress tolerance. In this study, 32 BnaPLD genes were identified and classified into six subgroups depending on the conserved protein structures. High similarity in gene and protein structures exists between BnaPLDs and AtPLDs. Gene expression analysis showed that BnaPLDα1s and BnaPLDδs had higher expression than other PLDs. BnaPLDα1 and BnaPLDδ were significantly induced by abiotic stresses including dehydration, NaCl, abscisic acid (ABA) and 4�C. Lipidomic analysis showed that the content of main membrane phospholipids decreased gradually under stresses, except phosphatidylglycerol increased under the treatment of ABA and phosphatidylethanolamine increased under 4�C. Correspondingly, their product of phosphatidic acid increased often with a transient peak at 8 h. The plant height of mutants of PLDα1 was significantly reduced. Agronomic traits such as yield, seed number, silique number and branches were significantly impaired in PLDα1 mutants. These results indicate that there is a large family of PLD genes in B. napus, especially BnaPLDα1s and BnaPLDδs may play important roles in membrane lipids remodeling and maintaining of the growth and stress tolerance of B. napus.
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Affiliation(s)
- Shaoping Lu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
- These authors contributed equally to this work
| | - Tarig Fadlalla
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
- These authors contributed equally to this work
| | - Shan Tang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Long Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Usman Ali
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Qing Li
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Liang Guo
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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Abstract
Phospholipase D (PLD) hydrolyzes structural phospholipids like phosphatidylcholine (PC) and phosphatidylethanolamine (PE) into phosphatidic acid (PA) and free choline/ethanolamine. In plants, this activity can be stimulated by a wide variety of biotic and abiotic stresses (Li et al., Biochim Biophys Acta 1791:927-935, 2009; Testerink and Munnik, J Exp Bot 62(7):2349-2361, 2011). This chapter describes a protocol for the measurement of PLD activity in vivo. The protocol takes advantage of a unique property of PLD, i.e., its ability to substitute a primary alcohol, such as 1-butanol, for water in the hydrolytic reaction. This transphosphatidylation reaction results in the formation of phosphatidylbutanol (PBut), which is a specific and unique reporter for PLD activity. The assay is highly sensitive for detecting PLD activity in vivo, following stimulation of intact plant cells, seedlings, and tissues, being a valuable method for studying the regulation of plant PLD activity in vivo.
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Affiliation(s)
- Teun Munnik
- Swammerdam Institute for Life Sciences, Section Plant Physiology, University of Amsterdam, Amsterdam, The Netherlands
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