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Li Y, Li Y, Zou X, Jiang S, Cao M, Chen F, Yin Y, Xiao W, Liu S, Guo X. Bioinformatic Identification and Expression Analyses of the MAPK-MAP4K Gene Family Reveal a Putative Functional MAP4K10-MAP3K7/8-MAP2K1/11-MAPK3/6 Cascade in Wheat ( Triticum aestivum L.). PLANTS (BASEL, SWITZERLAND) 2024; 13:941. [PMID: 38611471 PMCID: PMC11013086 DOI: 10.3390/plants13070941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/19/2024] [Accepted: 03/22/2024] [Indexed: 04/14/2024]
Abstract
The mitogen-activated protein kinase (MAPK) cascades act as crucial signaling modules that regulate plant growth and development, response to biotic/abiotic stresses, and plant immunity. MAP3Ks can be activated through MAP4K phosphorylation in non-plant systems, but this has not been reported in plants to date. Here, we identified a total of 234 putative TaMAPK family members in wheat (Triticum aestivum L.). They included 48 MAPKs, 17 MAP2Ks, 144 MAP3Ks, and 25 MAP4Ks. We conducted systematic analyses of the evolution, domain conservation, interaction networks, and expression profiles of these TaMAPK-TaMAP4K (representing TaMAPK, TaMAP2K, TaMAP3K, and TaMAP4K) kinase family members. The 234 TaMAPK-TaMAP4Ks are distributed on 21 chromosomes and one unknown linkage group (Un). Notably, 25 of these TaMAP4K family members possessed the conserved motifs of MAP4K genes, including glycine-rich motif, invariant lysine (K) motif, HRD motif, DFG motif, and signature motif. TaMAPK3 and 6, and TaMAP4K10/24 were shown to be strongly expressed not only throughout the growth and development stages but also in response to drought or heat stress. The bioinformatics analyses and qRT-PCR results suggested that wheat may activate the MAP4K10-MEKK7-MAP2K11-MAPK6 pathway to increase drought resistance in wheat, and the MAP4K10-MAP3K8-MAP2K1/11-MAPK3 pathway may be involved in plant growth. In general, our work identified members of the MAPK-MAP4K cascade in wheat and profiled their potential roles during their response to abiotic stresses and plant growth based on their expression pattern. The characterized cascades might be good candidates for future crop improvement and molecular breeding.
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Affiliation(s)
- Yongliang Li
- College of Biology, Hunan University, Changsha 410082, China
- Chongqing Research Institute, Hunan University, Chongqing 401120, China; (Y.L.); (Y.L.); (X.Z.); (S.J.); (M.C.); (F.C.); (Y.Y.)
| | - You Li
- College of Biology, Hunan University, Changsha 410082, China
| | - Xiaoxiao Zou
- College of Biology, Hunan University, Changsha 410082, China
| | - Shuai Jiang
- College of Biology, Hunan University, Changsha 410082, China
| | - Miyuan Cao
- College of Biology, Hunan University, Changsha 410082, China
| | - Fenglin Chen
- College of Biology, Hunan University, Changsha 410082, China
| | - Yan Yin
- College of Biology, Hunan University, Changsha 410082, China
| | - Wenjun Xiao
- College of Biology, Hunan University, Changsha 410082, China
- Chongqing Research Institute, Hunan University, Chongqing 401120, China; (Y.L.); (Y.L.); (X.Z.); (S.J.); (M.C.); (F.C.); (Y.Y.)
| | - Shucan Liu
- College of Biology, Hunan University, Changsha 410082, China
- Chongqing Research Institute, Hunan University, Chongqing 401120, China; (Y.L.); (Y.L.); (X.Z.); (S.J.); (M.C.); (F.C.); (Y.Y.)
| | - Xinhong Guo
- College of Biology, Hunan University, Changsha 410082, China
- Chongqing Research Institute, Hunan University, Chongqing 401120, China; (Y.L.); (Y.L.); (X.Z.); (S.J.); (M.C.); (F.C.); (Y.Y.)
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Chen L, Song H, Xin J, Dong G, Xu F, Su Y, Yang M, Sun H. Comprehensive genome-wide identification and functional characterization of MAPK cascade gene families in Nelumbo. Int J Biol Macromol 2023; 233:123543. [PMID: 36740124 DOI: 10.1016/j.ijbiomac.2023.123543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 12/25/2022] [Accepted: 01/28/2023] [Indexed: 02/05/2023]
Abstract
Mitogen-activated protein kinase (MAPK) cascade signaling pathway plays pivotal roles in various plant biological processes. However, systematic study of MAPK cascade gene families is yet to be conducted in lotus. Herein, 198 putative MAPK genes, including 152 MAP3Ks, 15 MKKs, and 31 MPKs genes were identified in Nelumbo. Segmental duplication was identified as the predominant factor driving MAPK cascade gene family expansion in lotus. MAPK cascade genes in N. nucifera and N. lutea shared high degree of sequence homologies, with 84, 9, and 19 homologous MAP3K, MKK, and MPK gene pairs being detected between the two species, respectively, with most genes predominantly undergoing purifying selection. Gene expression profiling indicated that NnMAPK cascade genes were extensively involved in plant development and submergence stress response. Co-expression analysis revealed potential interaction between transcription factors (TFs) and NnMAPK cascade genes in various biological processes. NnMKK showed predicted interactions with multiple NnMAP3K or NnMPK proteins, which suggested that functional diversity of MAPK cascade genes could be as a result of their complex protein interaction mechanisms. This first systematic analysis of MAPK cascade families in lotus provides deeper insights into their evolutionary dynamics and functional properties, which potentially could be crucial for lotus genetic improvement.
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Affiliation(s)
- Lin Chen
- Applied Biotechnology Center, Wuhan University of Bioengineering, Wuhan 430415, China
| | - Heyun Song
- Aquatic Plant Research Center, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jia Xin
- Aquatic Plant Research Center, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | | | - Fei Xu
- Applied Biotechnology Center, Wuhan University of Bioengineering, Wuhan 430415, China
| | - Yanyan Su
- Amway (China) Botanical R&D Centre, Wuxi, China
| | - Mei Yang
- Aquatic Plant Research Center, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, Hubei, China.
| | - Heng Sun
- Aquatic Plant Research Center, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; Hubei Key Laboratory of Wetland Evolution and Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, Hubei, China.
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3
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Majeed Y, Zhu X, Zhang N, ul-Ain N, Raza A, Haider FU, Si H. Harnessing the role of mitogen-activated protein kinases against abiotic stresses in plants. FRONTIERS IN PLANT SCIENCE 2023; 14:932923. [PMID: 36909407 PMCID: PMC10000299 DOI: 10.3389/fpls.2023.932923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Crop plants are vulnerable to various biotic and abiotic stresses, whereas plants tend to retain their physiological mechanisms by evolving cellular regulation. To mitigate the adverse effects of abiotic stresses, many defense mechanisms are induced in plants. One of these mechanisms is the mitogen-activated protein kinase (MAPK) cascade, a signaling pathway used in the transduction of extracellular stimuli into intercellular responses. This stress signaling pathway is activated by a series of responses involving MAPKKKs→MAPKKs→MAPKs, consisting of interacting proteins, and their functions depend on the collaboration and activation of one another by phosphorylation. These proteins are key regulators of MAPK in various crop plants under abiotic stress conditions and also related to hormonal responses. It is revealed that in response to stress signaling, MAPKs are characterized as multigenic families and elaborate the specific stimuli transformation as well as the antioxidant regulation system. This pathway is directed by the framework of proteins and stopping domains confer the related associates with unique structure and functions. Early studies of plant MAPKs focused on their functions in model plants. Based on the results of whole-genome sequencing, many MAPKs have been identified in plants, such as Arbodiposis, tomato, potato, alfalfa, poplar, rice, wheat, maize, and apple. In this review, we summarized the recent work on MAPK response to abiotic stress and the classification of MAPK cascade in crop plants. Moreover, we highlighted the modern research methodologies such as transcriptomics, proteomics, CRISPR/Cas technology, and epigenetic studies, which proposed, identified, and characterized the novel genes associated with MAPKs and their role in plants under abiotic stress conditions. In-silico-based identification of novel MAPK genes also facilitates future research on MAPK cascade identification and function in crop plants under various stress conditions.
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Affiliation(s)
- Yasir Majeed
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
| | - Xi Zhu
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
| | - Ning Zhang
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Noor ul-Ain
- Fujian Agricultural and Forestry University (FAFU) and University of Illinois Urbana-Champaign-School of Integrative Biology (UIUC-SIB) Joint Center for Genomics and Biotechnology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Ali Raza
- College of Agriculture, Fujian Agriculture and Forestry University (FAFU), Fuzhou, Fujian, China
| | - Fasih Ullah Haider
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, China
| | - Huaijun Si
- State Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, China
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
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MAPKKKs in Plants: Multidimensional Regulators of Plant Growth and Stress Responses. Int J Mol Sci 2023; 24:ijms24044117. [PMID: 36835531 PMCID: PMC9963060 DOI: 10.3390/ijms24044117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/22/2023] Open
Abstract
Mitogen-activated protein kinase kinase kinase (MAPKKK, MAP3K) is located upstream of the mitogen-activated protein kinase (MAPK) cascade pathway and is responsible for receiving and transmitting external signals to the downstream MAPKKs. Although a large number of MAP3K genes play important roles in plant growth and development, and response to abiotic and biotic stresses, only a few members' functions and cascade signaling pathways have been clarified, and the downstream MAPKKs and MAPKs of most MAP3Ks are still unknown. As more and more signaling pathways are discovered, the function and regulatory mechanism of MAP3K genes will become clearer. In this paper, the MAP3K genes in plants were classified and the members and basic characteristics of each subfamily of MAP3K were briefly described. Moreover, the roles of plant MAP3Ks in regulating plant growth and development and stress (abiotic and biotic) responses are described in detail. In addition, the roles of MAP3Ks involved in plant hormones signal transduction pathway were briefly introduced, and the future research focus was prospected.
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Zhang Z, Jia L, Chen Q, Qiao Q, Huang X, Zhang S. Genome-wide identification of the mitogen-activated protein kinase kinase kinase (MAPKKK) in pear (Pyrus bretschneideri) and their functional analysis in response to black spot. PLANTA 2022; 257:5. [PMID: 36434152 DOI: 10.1007/s00425-022-04020-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Identification of MAPKKK genes in pear and functional characterization of PbrMAPKKK82 in response to pear black spot. Mitogen-activated protein kinase kinase kinase (MAPKKK) is located upstream of the MAPK cascade pathway. This region senses extracellular stimuli via the signaling molecule or by themselves and is activated by phosphorylation. In this study, we identified 108 PbrMAPKKK genes from the pear genome. The genes were divided into three subfamilies and contained the conserved domain. Except for chromosome 7, there were 93 PbrMAPKKK genes randomly distributed on 16 out of the 17 chromosomes, while 15 PbrMAPKKK genes were detected on unknown chromosomes. They largely originated from whole-genome duplication (WGD) and dispersed events. In the expression analysis of PbrMAPKKK genes in seven pear tissue types by using a database, 20 PbrMAPKKK genes were selected to verify the expression associated with different resistance in two varieties by quantitative real-time PCR (qRT-PCR). The results showed that PbrMAPKKK12, PbrMAPKKK13, PbrMAPKKK53, PbrMAPKKK60, PbrMAPKKK65, PbrMAPKKK82, PbrMAPKKK83, and PbrMAPKKK96 were correlated with black spot resistance. PbrMAPKKK3, PbrMAPKKK9, PbrMAPKKK11, PbrMAPKKK34, PbrMAPKKK80, PbrMAPKKK81, PbrMAPKKK99, and PbrMAPKKK100 were correlated with black spot susceptibility, while the PbrMAPKKK gene positively responded to the life process of pear resistance to black spot. Furthermore, virus-induced gene silencing (VIGS) indicated that the PbrMAPKKK82 gene enhanced resistance to pear black spot disease.
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Affiliation(s)
- Zan Zhang
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Luting Jia
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qiming Chen
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qinghai Qiao
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China
| | - Xiaosan Huang
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
| | - Shaoling Zhang
- College of Horticulture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing, 210095, China.
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Wang Z, Yan S, Ren W, Liu Y, Sun W, Liu M, Lu J, Mi Y, Ma W. Genome-Wide Identification of MAPK, MAPKK, and MAPKKK Gene Families in Fagopyrum tataricum and Analysis of Their Expression Patterns Under Abiotic Stress. Front Genet 2022; 13:894048. [PMID: 35899198 PMCID: PMC9313540 DOI: 10.3389/fgene.2022.894048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
The mitogen-activated protein kinase (MAPK) cascade is a highly conserved signal transduction pathway, ubiquitous in eukaryotes, such as animals and plants. The MAPK cascade has a dominant role in regulating plant adaptation to the environment, such as through stress responses, osmotic adjustment, and processes that modulate pathogenicity. In the present study, the MAPK cascade gene family was identified in Fagopyrum tataricum (Tartary buckwheat), based on complete genome sequence data. Using phylogenetic tree, conservative motif, and chromosome location analyses, a total of 65 FtMAPK cascade genes, distributed on five chromosomes, were classified into three families: MAPK (n = 8), MAPKK (n = 1), and MAPKKK (n = 56). Transcriptome data from Tartary buckwheat seedlings grown under different light conditions demonstrated that, under blue and red light, the expression levels of 18 and 36 FtMAPK cascade genes were up-regulated and down-regulated, respectively. Through qRT-PCR experiments, it was observed that FtMAPK5, FtMAPKK1, FtMAPKKK8, FtMAPKKK10, and FtMAPKKK24 gene expression levels in the Tartary buckwheat seedlings increased under three types of abiotic stress: drought, salt, and high temperature. A co-expression network of FtMAPK cascade genes was constructed, based on gene expression levels under different light conditions, and co-expressed genes annotated by Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses, which identified numerous transcription factors related to plant abiotic stress. The authors conclude that FtMAPK cascade genes have important roles in the growth and development of Tartary buckwheat, as well as its responses to abiotic stress.
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Affiliation(s)
- Zhen Wang
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Song Yan
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Weichao Ren
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Yan Liu
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Wei Sun
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
| | - Meiqi Liu
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Jiaxin Lu
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Yaolei Mi
- Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing, China
- *Correspondence: Yaolei Mi, ; Wei Ma,
| | - Wei Ma
- Pharmacy of College, Heilongjiang University of Chinese Medicine, Harbin, China
- Key Laboratory of Basic and Application Research of Beiyao (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin, China
- *Correspondence: Yaolei Mi, ; Wei Ma,
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Zhou Z, Zhang L, Shu J, Wang M, Li H, Shu H, Wang X, Sun Q, Zhang S. Root Breeding in the Post-Genomics Era: From Concept to Practice in Apple. PLANTS (BASEL, SWITZERLAND) 2022; 11:1408. [PMID: 35684181 PMCID: PMC9182997 DOI: 10.3390/plants11111408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 05/05/2022] [Accepted: 05/23/2022] [Indexed: 06/15/2023]
Abstract
The development of rootstocks with a high-quality dwarf-type root system is a popular research topic in the apple industry. However, the precise breeding of rootstocks is still challenging, mainly because the root system is buried deep underground, roots have a complex life cycle, and research on root architecture has progressed slowly. This paper describes ideas for the precise breeding and domestication of wild apple resources and the application of key genes. The primary goal of this research is to combine the existing rootstock resources with molecular breeding and summarize the methods of precision breeding. Here, we reviewed the existing rootstock germplasm, high-quality genome, and genetic resources available to explain how wild resources might be used in modern breeding. In particular, we proposed the 'from genotype to phenotype' theory and summarized the difficulties in future breeding processes. Lastly, the genetics governing root diversity and associated regulatory mechanisms were elaborated on to optimize the precise breeding of rootstocks.
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Affiliation(s)
- Zhou Zhou
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Lei Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Jing Shu
- College of Forestry Engineering, Shandong Agriculture and Engineering University, Jinan 250100, China;
| | - Mengyu Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Han Li
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Huairui Shu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Xiaoyun Wang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Qinghua Sun
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
| | - Shizhong Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai’an 271018, China; (Z.Z.); (L.Z.); (M.W.); (H.L.); (H.S.); (X.W.)
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Wang N, Liu Y, Dong C, Zhang Y, Bai S. MdMAPKKK1 Regulates Apple Resistance to Botryosphaeria dothidea by Interacting with MdBSK1. Int J Mol Sci 2022; 23:ijms23084415. [PMID: 35457232 PMCID: PMC9030329 DOI: 10.3390/ijms23084415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/11/2022] [Accepted: 04/14/2022] [Indexed: 01/16/2023] Open
Abstract
Plant MAPK cascade performs a critical role in the regulation of plant immunity and disease resistance. Although the function of MAPK cascade in immunity regulation is partially conserved between different species, the mechanism varies in different host and pathogen combinations. To date, the MAPK cascade function of woody plants in the regulation of disease resistance has seldom been reported. Here, we present evidence to show that apple MdMAPKKK1 performed an important role in the regulation of apple resistance to Botryosphaeria dothidea, the causal agent of apple ring rot. B. dothidea infection leads to enhanced MdMAPKKK1 expression and MAPK cascade activation, indicating that the MAPK cascade is involved in the defense against B. dothidea. MdMAPKKK1 overexpression-induced pathogen-independent cell death. MdMAPKKK1 silencing decreases the resistance of apple calli and fruits to B. dothidea. Further analysis indicates that MdMAPKKK1 can bind MdBSK1 and is likely phosphorylated by it. The MdBSK1-mediated phosphorylation of MdMAPKKK1 is important for resistance to B. dothidea. These results collectively indicate that apple resistance to B. dothidea is regulated by the interaction between MAPKKK1 and MdBSK1.
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Affiliation(s)
- Nan Wang
- Key Laboratory of Plant Biotechnology of Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China; (N.W.); (C.D.)
| | - Yingshuang Liu
- College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.Z.)
| | - Chaohua Dong
- Key Laboratory of Plant Biotechnology of Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China; (N.W.); (C.D.)
- Shandong Province Key Laboratory of Applied Mycology, Qing Agricultural University, Qingdao 266109, China
| | - Yugang Zhang
- College of Horticulture, Qingdao Agricultural University, Qingdao 266109, China; (Y.L.); (Y.Z.)
| | - Suhua Bai
- Key Laboratory of Plant Biotechnology of Shandong Province, College of Life Sciences, Qingdao Agricultural University, Qingdao 266109, China; (N.W.); (C.D.)
- Shandong Province Key Laboratory of Applied Mycology, Qing Agricultural University, Qingdao 266109, China
- Correspondence:
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Ma Q, Hu Z, Mao Z, Mei Y, Feng S, Shi K. A novel leucine-rich repeat receptor-like kinase MRK1 regulates resistance to multiple stresses in tomato. HORTICULTURE RESEARCH 2022; 9:uhab088. [PMID: 35048129 PMCID: PMC9123237 DOI: 10.1093/hr/uhab088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 12/13/2021] [Indexed: 06/14/2023]
Abstract
Leucine-rich repeat receptor-like kinases (LRR-RLKs) are ubiquitous in higher plants, which act as receptors of extracellular signals to trigger multiple physiological processes. However, the functions of the majority of LRR-RLKs remain largely unknown, especially in tomato (Solanum lycopersicum L.). Here, we found that MRK1 (Multiple resistance-associated kinase 1), encoding a novel tomato LRR-RLK, was significantly induced either by temperature stresses or bacterial pathogen attacks. Knocking out MRK1 impaired the tolerance to both cold and heat stress, accompanied with the decrease in transcripts of master regulators C-repeat binding factor 1 (CBF1) and Heat shock transcription factor a-1a (HsfA1a), respectively. Additionally, mrk1 mutants were hypersensitive to Pseudomonas syringae pv. tomato DC3000 and Ralstonia solanacearum and compromised pattern-triggered immunity (PTI) responses as evidenced by decreased reactive oxygen species production and reduced upregulation of the PTI marker genes. Moreover, bimolecular fluorescence complementation, split-luciferase assay and coimmunoprecipitation supported the existence of complex formation between the MRK1, FLS2 and Somatic embryogenesis receptor kinase (SERK3A/SERK3B) in a ligand-independent manner. This work demonstrates that tomato MRK1 as a novel positive regulator of multiple stresses, which might be a potential breeding target to improve crop stress resistance.
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Affiliation(s)
- Qiaomei Ma
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Zhangjian Hu
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Zhuo Mao
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Yuyang Mei
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Shuxian Feng
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Kai Shi
- Department of Horticulture, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
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Paul A, Srivastava AP, Subrahmanya S, Shen G, Mishra N. In-silico genome wide analysis of Mitogen activated protein kinase kinase kinase gene family in C. sinensis. PLoS One 2021; 16:e0258657. [PMID: 34735479 PMCID: PMC8568164 DOI: 10.1371/journal.pone.0258657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 10/01/2021] [Indexed: 11/19/2022] Open
Abstract
Mitogen activated protein kinase kinase kinase (MAPKKK) form the upstream component of MAPK cascade. It is well characterized in several plants such as Arabidopsis and rice however the knowledge about MAPKKKs in tea plant is largely unknown. In the present study, MAPKKK genes of tea were obtained through a genome wide search using Arabidopsis thaliana as the reference genome. Among 59 candidate MAPKKK genes in tea, 17 genes were MEKK-like, 31 genes were Raf-like and 11 genes were ZIK- like. Additionally, phylogenetic relationships were established along with structural analysis, which includes gene structure, its location as well as conserved motifs, cis-acting regulatory elements and functional domain signatures that were systematically examined. Also, on the basis of one orthologous gene found between tea and Arabidopsis, functional interaction was carried out in C. sinensis based on an Arabidopsis association model. The expressional profiles indicated major involvement of MAPKKK genes from tea in response to various abiotic stress factors. Taken together, this study provides the targets for additional inclusive identification, functional study, and provides comprehensive knowledge for a better understanding of the MAPKKK cascade regulatory network in C. sinensis.
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Affiliation(s)
- Abhirup Paul
- Department of Biochemistry, REVA University, Bangalore, Karnataka, India
| | - Anurag P. Srivastava
- Department of Life Sciences, Garden City University, Bangalore, Karnataka, India
| | - Shreya Subrahmanya
- Department of Botany, St. Joseph’s College Autonomous, Bangalore, Karnataka, India
| | - Guoxin Shen
- Sericultural Research Institute, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Neelam Mishra
- Department of Botany, St. Joseph’s College Autonomous, Bangalore, Karnataka, India
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11
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He X, Wang C, Wang H, Li L, Wang C. The Function of MAPK Cascades in Response to Various Stresses in Horticultural Plants. FRONTIERS IN PLANT SCIENCE 2020; 11:952. [PMID: 32849671 PMCID: PMC7412866 DOI: 10.3389/fpls.2020.00952] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 06/10/2020] [Indexed: 05/08/2023]
Abstract
The mitogen-activated protein kinase (MAPK) cascade is a highly conserved signaling transduction module that transduces extracellular stimuli into intracellular responses in plants. Early studies of plant MAPKs focused on their functions in model plants. Based on the results of whole-genome sequencing, many MAPKs have been identified in horticultural plants, such as tomato and apple. Recent studies revealed that the MAPK cascade also plays crucial roles in the biotic and abiotic stress responses of horticultural plants. In this review, we summarize the composition and classification of MAPK cascades in horticultural plants and recent research on this cascade in responses to abiotic stresses (such as drought, extreme temperature and high salinity) and biotic stresses (such as pathogen infection). In addition, we discuss the most advanced research themes related to plant MAPK cascades, thus facilitating research on MAPK cascade functions in horticultural plants.
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Affiliation(s)
- Xiaowen He
- Shandong Institute of Pomology, Taian, China
| | | | - Haibo Wang
- Shandong Institute of Pomology, Taian, China
| | - Linguang Li
- Shandong Institute of Pomology, Taian, China
| | - Chen Wang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, China
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12
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Genome-wide identification of mitogen-activated protein kinase (MAPK) cascade and expression profiling of CmMAPKs in melon (Cucumis melo L.). PLoS One 2020; 15:e0232756. [PMID: 32407323 PMCID: PMC7224490 DOI: 10.1371/journal.pone.0232756] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 04/21/2020] [Indexed: 11/19/2022] Open
Abstract
Mitogen-activated protein kinase (MAPK) is a form of serine/threonine protein kinase that activated by extracellular stimulation acting through the MAPK cascade (MAPKKK-MAPKK-MAPK). The MAPK cascade gene family, an important family of protein kinases, plays a vital role in responding to various stresses and hormone signal transduction processes in plants. In this study, we identified 14 CmMAPKs, 6 CmMAPKKs and 64 CmMAPKKKs in melon genome. Based on structural characteristics and a comparison of phylogenetic relationships of MAPK gene families from Arabidopsis, cucumber and watermelon, CmMAPKs and CmMAPKKs were categorized into 4 groups, and CmMAPKKKs were categorized into 3 groups. Furthermore, chromosome location revealed an unevenly distribution on chromosomes of MAPK cascade genes in melon, respectively. Eventually, qRT-PCR analysis showed that all 14 CmMAPKs had different expression patterns under drought, salt, salicylic acid (SA), methyl jasmonate (MeJA), red light (RL), and Podosphaera xanthii (P. xanthii) treatments. Overall, the expression levels of CmMAPK3 and CmMAPK7 under different treatments were higher than those in control. Our study provides an important basis for future functional verification of MAPK genes in regulating responses to stress and signal substance in melon.
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13
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Liu Z, Wang L, Xue C, Chu Y, Gao W, Zhao Y, Zhao J, Liu M. Genome-wide identification of MAPKKK genes and their responses to phytoplasma infection in Chinese jujube (Ziziphus jujuba Mill.). BMC Genomics 2020; 21:142. [PMID: 32041543 PMCID: PMC7011567 DOI: 10.1186/s12864-020-6548-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 01/31/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mitogen-activated protein kinase (MAPK) cascades play vital roles in signal transduction in response to a wide range of biotic and abiotic stresses. In a previous study, we identified ten ZjMAPKs and five ZjMAPKKs in the Chinese jujube genome. We found that some members of ZjMAPKs and ZjMAPKKs may play key roles in the plant's response to phytoplasma infection. However, how these ZjMAPKKs are modulated by ZjMAPKKKs during the response process has not been elucidated. Little information is available regarding MAPKKKs in Chinese jujube. RESULTS A total of 56 ZjMAPKKKs were identified in the jujube genome. All of these kinases contain the key S-TKc (serine/threonine protein kinase) domain, which is distributed among all 12 chromosomes. Phylogenetic analyses show that these ZjMAPKKKs can be classified into two subfamilies. Specifically, 41 ZjMAPKKKs belong to the Raf subfamily, and 15 belong to the MEKK subfamily. In addition, the ZjMAPKKKs in each subfamily share the same conserved motifs and gene structures. Only one pair of ZjMAPKKKs (15/16, on chromosome 5) was found to be tandemly duplicated. Using qPCR, the expression profiles of these MAPKKKs were investigated in response to infection with phytoplasma. In the three main infected tissues (witches' broom leaves, phyllody leaves, and apparently normal leaves), ZjMAPKKK26 and - 45 were significantly upregulated, and ZjMAPKKK3, - 43 and - 50 were significantly downregulated. ZjMAPKKK4, - 10, - 25 and - 44 were significantly and highly induced in sterile cultivated tissues infected by phytoplasma, while ZjMAPKKK6, - 7, - 17, - 18, - 30, - 34, - 35, - 37, - 40, - 41, - 43, - 46, - 52 and - 53 were significantly downregulated. CONCLUSIONS For the first time, we present an identification and classification analysis of ZjMAPKKKs. Some ZjMAPKKK genes may play key roles in the response to phytoplasma infection. This study provides an initial understanding of the mechanisms through which ZjMAPKKKs are involved in the response of Chinese jujube to phytoplasma infection.
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Affiliation(s)
- Zhiguo Liu
- College of Horticulture, Hebei Agricultural University, Baoding, China.,Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, China
| | - Lixin Wang
- College of Horticulture, Hebei Agricultural University, Baoding, China.,Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, China
| | - Chaoling Xue
- College of Life Science, Hebei Agricultural University, Baoding, China.,Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, Hebei Agricultural University, Baoding, Hebei, China
| | - Yuetong Chu
- College of Horticulture, Hebei Agricultural University, Baoding, China.,Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, China
| | - Weilin Gao
- College of Life Science, Hebei Agricultural University, Baoding, China.,Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, Hebei Agricultural University, Baoding, Hebei, China
| | - Yitong Zhao
- College of Life Science, Hebei Agricultural University, Baoding, China.,Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, Hebei Agricultural University, Baoding, Hebei, China
| | - Jin Zhao
- College of Life Science, Hebei Agricultural University, Baoding, China. .,Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, Hebei Agricultural University, Baoding, Hebei, China.
| | - Mengjun Liu
- College of Horticulture, Hebei Agricultural University, Baoding, China. .,Research Center of Chinese Jujube, Hebei Agricultural University, Baoding, China.
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14
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Liu JX, Feng K, Duan AQ, Li H, Yang QQ, Xu ZS, Xiong AS. Isolation, purification and characterization of an ascorbate peroxidase from celery and overexpression of the AgAPX1 gene enhanced ascorbate content and drought tolerance in Arabidopsis. BMC PLANT BIOLOGY 2019; 19:488. [PMID: 31711410 PMCID: PMC6849298 DOI: 10.1186/s12870-019-2095-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 10/23/2019] [Indexed: 05/16/2023]
Abstract
BACKGROUND Celery is a widely cultivated vegetable abundant in ascorbate (AsA), a natural plant antioxidant capable of scavenging free radicals generated by abiotic stress in plants. Ascorbate peroxidase (APX) is a plant antioxidant enzyme that is important in the synthesis of AsA and scavenging of excess hydrogen peroxide. However, the characteristics and functions of APX in celery remain unclear to date. RESULTS In this study, a gene encoding APX was cloned from celery and named AgAPX1. The transcription level of the AgAPX1 gene was significantly upregulated under drought stress. AgAPX1 was expressed in Escherichia coli BL21 (DE3) and purified. The predicted molecular mass of rAgAPX1 was 33.16 kDa, which was verified by SDS-PAGE assay. The optimum pH and temperature for rAgAPX1 were 7.0 and 55 °C, respectively. Transgenic Arabidopsis hosting the AgAPX1 gene showed elevated AsA content, antioxidant capacity and drought resistance. Less decrease in net photosynthetic rate, chlorophyll content, and relative water content contributed to the high survival rate of transgenic Arabidopsis lines after drought. CONCLUSIONS The characteristics of APX in celery were different from that in other species. The enhanced drought resistance of overexpressing AgAPX1 in Arabidopsis may be achieved by increasing the accumulation of AsA, enhancing the activities of various antioxidant enzymes, and promoting stomatal closure. Our work provides new evidence to understand APX and its response mechanisms to drought stress in celery.
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Affiliation(s)
- Jie-Xia Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Kai Feng
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Ao-Qi Duan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Hui Li
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Qing-Qing Yang
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Zhi-Sheng Xu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
| | - Ai-Sheng Xiong
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Ministry of Agriculture and Rural Affairs Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in East China, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095 China
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15
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Dai L, Zhang G, Yu Z, Ding H, Xu Y, Zhang Z. Effect of Drought Stress and Developmental Stages on Microbial Community Structure and Diversity in Peanut Rhizosphere Soil. Int J Mol Sci 2019; 20:ijms20092265. [PMID: 31071918 PMCID: PMC6540327 DOI: 10.3390/ijms20092265] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/03/2019] [Accepted: 05/06/2019] [Indexed: 01/13/2023] Open
Abstract
Background: Peanut (Arachis hypogaea L.), an important oilseed and food legume, is widely cultivated in the semi-arid tropics. Drought is the major stress in this region which limits productivity. Microbial communities in the rhizosphere are of special importance to stress tolerance. However, relatively little is known about the relationship between drought and microbial communities in peanuts. Method: In this study, deep sequencing of the V3-V4 region of the 16S rRNA gene was performed to characterize the microbial community structure of drought-treated and untreated peanuts. Results: Taxonomic analysis showed that Actinobacteria, Proteobacteria, Saccharibacteria, Chloroflexi, Acidobacteria and Cyanobacteria were the dominant phyla in the peanut rhizosphere. Comparisons of microbial community structure of peanuts revealed that the relative abundance of Actinobacteria and Acidobacteria dramatically increased in the seedling and podding stages in drought-treated soil, while that of Cyanobacteria and Gemmatimonadetes increased in the flowering stage in drought-treated rhizospheres. Metagenomic profiling indicated that sequences related to metabolism, signaling transduction, defense mechanism and basic vital activity were enriched in the drought-treated rhizosphere, which may have implications for plant survival and drought tolerance. Conclusion: This microbial communities study will form the foundation for future improvement of drought tolerance of peanuts via modification of the soil microbes.
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Affiliation(s)
- Liangxiang Dai
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
| | - Guanchu Zhang
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
| | - Zipeng Yu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an 271018, China.
| | - Hong Ding
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
| | - Yang Xu
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
| | - Zhimeng Zhang
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
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16
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Yu Z, Xu Y, Liu L, Guo Y, Yuan X, Man X, Liu C, Yang G, Huang J, Yan K, Zheng C, Wu C, Zhang S. The Importance of Conserved Serine for C-Terminally Encoded Peptides Function Exertion in Apple. Int J Mol Sci 2019; 20:ijms20030775. [PMID: 30759748 PMCID: PMC6387203 DOI: 10.3390/ijms20030775] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/06/2019] [Accepted: 02/06/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND The C-terminally encoded peptide (CEP) family has been shown to play vital roles in plant growth. Although a genome-wide analysis of this family has been performed in Arabidopsis, little is known regarding CEPs in apple (Malus domestica). METHODS Here, a comprehensive bioinformatics approach was applied to identify MdCEPs in apple, and 12 MdCEP genes were identified and distributed on 6 chromosomes. RESULTS MdCEP1 peptide had an inhibitory effect on root growth of apple seedlings, indicating that MdCEP1 played a negative role in root development. In addition, the serine and glycine residues remained conserved within the CEP domains, and MdCEP1 lost its function after mutation of these two key amino acids, suggesting that Ser10 and Gly14 residues are crucial for MdCEPs-mediated root growth of apple. Encouragingly, multiple sequence alignment of 273 CEP domains showed that Ser10 residue was evolutionarily conserved in monocot and eudicot plants. MdCEP derivative (Ser to Cys) lost the ability to inhibit the root growth of Nicotiana benthamiana, Setaria italic, Samolous parviflorus, and Raphanus sativus L. and up-regulate the NO3- importer gene NRT2.1. CONCLUSION Taken together, Ser10 residue is crucial for CEP function exertion in higher land plants, at least in apple.
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Affiliation(s)
- Zipeng Yu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Yang Xu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
- Shandong Peanut Research Institute, Shandong Academy of Agricultural Sciences, Qingdao 266100, China.
| | - Lin Liu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Yarong Guo
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Xisen Yuan
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Xinyu Man
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Chang Liu
- Entomology and Nematology Department, University of Florida, Gainesville, FL 32611, USA.
| | - Guodong Yang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Jinguang Huang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Kang Yan
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Chengchao Zheng
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Changai Wu
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
| | - Shizhong Zhang
- State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, Shandong 271018, China.
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