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Rong M, Gao SX, Wen D, Xu YH, Wei JH. The LOB domain protein, a novel transcription factor with multiple functions: A review. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 214:108922. [PMID: 39038384 DOI: 10.1016/j.plaphy.2024.108922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2024] [Revised: 07/03/2024] [Accepted: 07/06/2024] [Indexed: 07/24/2024]
Abstract
The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) protein, named for its LATERAL ORGAN BOUNDARIES (LOB) domain, is a member of a class of specific transcription factors commonly found in plants and is absent from all other groups of organisms. LBD TFs have been systematically identified in about 35 plant species and are involved in regulating various aspects of plant growth and development. However, research on the signaling network and regulatory functions of LBD TFs is insufficient, and only a few members have been studied. Moreover, a comprehensive review of these existing studies is lacking. In this review, the structure, regulatory mechanism and function of LBD TFs in recent years were reviewed in order to better understand the role of LBD TFs in plant growth and development, and to provide a new perspective for the follow-up study of LBD TFs.
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Affiliation(s)
- Mei Rong
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Shi-Xi Gao
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Dong Wen
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China
| | - Yan-Hong Xu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China.
| | - Jian-He Wei
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education & National Engineering Laboratory for Breeding of Endangered Medicinal Materials, Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100193, China; Hainan Provincial Key Laboratory of Resources Conservation and Development of Southern Medicine & Key Laboratory of State Administration of Traditional Chinese Medicine for Agarwood Sustainable Utilization, Hainan Branch of the Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Haikou, 570311, China.
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Wei X, Geng M, Yuan J, Zhan J, Liu L, Chen Y, Wang Y, Qin W, Duan H, Zhao H, Li F, Ge X. GhRCD1 promotes cotton tolerance to cadmium by regulating the GhbHLH12-GhMYB44-GhHMA1 transcriptional cascade. PLANT BIOTECHNOLOGY JOURNAL 2024; 22:1777-1796. [PMID: 38348566 PMCID: PMC11182589 DOI: 10.1111/pbi.14301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2023] [Revised: 01/10/2024] [Accepted: 01/16/2024] [Indexed: 06/19/2024]
Abstract
Heavy metal pollution poses a significant risk to human health and wreaks havoc on agricultural productivity. Phytoremediation, a plant-based, environmentally benign, and cost-effective method, is employed to remove heavy metals from contaminated soil, particularly in agricultural or heavy metal-sensitive lands. However, the phytoremediation capacity of various plant species and germplasm resources display significant genetic diversity, and the mechanisms underlying these differences remain hitherto obscure. Given its potential benefits, genetic improvement of plants is essential for enhancing their uptake of heavy metals, tolerance to harmful levels, as well as overall growth and development in contaminated soil. In this study, we uncover a molecular cascade that regulates cadmium (Cd2+) tolerance in cotton, involving GhRCD1, GhbHLH12, GhMYB44, and GhHMA1. We identified a Cd2+-sensitive cotton T-DNA insertion mutant with disrupted GhRCD1 expression. Genetic knockout of GhRCD1 by CRISPR/Cas9 technology resulted in reduced Cd2+ tolerance in cotton seedlings, while GhRCD1 overexpression enhanced Cd2+ tolerance. Through molecular interaction studies, we demonstrated that, in response to Cd2+ presence, GhRCD1 directly interacts with GhbHLH12. This interaction activates GhMYB44, which subsequently activates a heavy metal transporter, GhHMA1, by directly binding to a G-box cis-element in its promoter. These findings provide critical insights into a novel GhRCD1-GhbHLH12-GhMYB44-GhHMA1 regulatory module responsible for Cd2+ tolerance in cotton. Furthermore, our study paves the way for the development of elite Cd2+-tolerant cultivars by elucidating the molecular mechanisms governing the genetic control of Cd2+ tolerance in cotton.
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Affiliation(s)
- Xi Wei
- Research Base of State Key Laboratory of Cotton BiologyHenan Normal UniversityXinxiangChina
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Menghan Geng
- Research Base of State Key Laboratory of Cotton BiologyHenan Normal UniversityXinxiangChina
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Jiachen Yuan
- Zhengzhou Research Base, State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhouChina
| | - Jingjing Zhan
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Lisen Liu
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Yanli Chen
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Ye Wang
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Wenqiang Qin
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
| | - Hongying Duan
- Research Base of State Key Laboratory of Cotton BiologyHenan Normal UniversityXinxiangChina
| | - Hang Zhao
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
- Zhengzhou Research Base, State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhouChina
- College of Life SciencesQufu Normal UniversityQufuChina
| | - Fuguang Li
- Research Base of State Key Laboratory of Cotton BiologyHenan Normal UniversityXinxiangChina
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
- Zhengzhou Research Base, State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhouChina
- Western Agricultural Research Center, Chinese Academy of Agricultural SciencesChangjiXinjiangChina
| | - Xiaoyang Ge
- Research Base of State Key Laboratory of Cotton BiologyHenan Normal UniversityXinxiangChina
- State Key Laboratory of Cotton BiologyInstitute of Cotton Research, Chinese Academy of Agricultural SciencesAnyangChina
- Zhengzhou Research Base, State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhouChina
- Western Agricultural Research Center, Chinese Academy of Agricultural SciencesChangjiXinjiangChina
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Wang C, Lei J, Jin X, Chai S, Jiao C, Yang X, Wang L. A Sweet Potato MYB Transcription Factor IbMYB330 Enhances Tolerance to Drought and Salt Stress in Transgenic Tobacco. Genes (Basel) 2024; 15:693. [PMID: 38927629 PMCID: PMC11202548 DOI: 10.3390/genes15060693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/22/2024] [Accepted: 05/23/2024] [Indexed: 06/28/2024] Open
Abstract
MYB transcription factors (TFs) play vital roles in plant growth, development, and response to adversity. Although the MYB gene family has been studied in many plant species, there is still little known about the function of R2R3 MYB TFs in sweet potato in response to abiotic stresses. In this study, an R2R3 MYB gene, IbMYB330 was isolated from sweet potato (Ipomoea batatas). IbMYB330 was ectopically expressed in tobacco and the functional characterization was performed by overexpression in transgenic plants. The IbMYB330 protein has a 268 amino acid sequence and contains two highly conserved MYB domains. The molecular weight and isoelectric point of IbMYB330 are 29.24 kD and 9.12, respectively. The expression of IbMYB330 in sweet potato is tissue-specific, and levels in the root were significantly higher than that in the leaf and stem. It showed that the expression of IbMYB330 was strongly induced by PEG-6000, NaCl, and H2O2. Ectopic expression of IbMYB330 led to increased transcript levels of stress-related genes such as SOD, POD, APX, and P5CS. Moreover, compared to the wild-type (WT), transgenic tobacco overexpression of IbMYB330 enhanced the tolerance to drought and salt stress treatment as CAT activity, POD activity, proline content, and protein content in transgenic tobacco had increased, while MDA content had decreased. Taken together, our study demonstrated that IbMYB330 plays a role in enhancing the resistance of sweet potato to stresses. These findings lay the groundwork for future research on the R2R3-MYB genes of sweet potato and indicates that IbMYB330 may be a candidate gene for improving abiotic stress tolerance in crops.
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Affiliation(s)
- Chong Wang
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
- Crop Institute of Jiangxi Academy Agricultural Sciences, Nanchang 330200, China
| | - Jian Lei
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
| | - Xiaojie Jin
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
| | - Shasha Chai
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
| | - Chunhai Jiao
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
| | - Xinsun Yang
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
- College of Agriculture, Yangtze University, Jingzhou 434025, China
| | - Lianjun Wang
- Institute of Food Crops, Hubei Academy of Agricultural Sciences, Hubei Key Laboratory of Food Crop Germplasm and Genetic Improvement, Key Laboratory of Crop Molecular Breeding, Ministry of Agriculture and Rural Affairs, Wuhan 430064, China; (C.W.); (J.L.); (X.J.); (S.C.); (C.J.)
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Xiao YL, Li GS. Differential expression and co-localization of transcriptional factors during callus transition to differentiation for shoot organogenesis in the water fern Ceratopteris richardii. ANNALS OF BOTANY 2024; 133:495-507. [PMID: 38206867 PMCID: PMC11006541 DOI: 10.1093/aob/mcae006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Accepted: 01/10/2024] [Indexed: 01/13/2024]
Abstract
BACKGROUND AND AIMS In flowering plants, regeneration can be achieved by a variety of approaches, and different sets of transcriptional factors are involved in these processes. However, regeneration in taxa other than flowering plants remains a mystery. Ceratopteris richardii is a representative fern capable of both direct and indirect organogenesis, and we aimed to investigate the genetics underlying the transition from callus proliferation to differentiation. METHODS Morphological and histological analyses were used to determine the type of regeneration involved. RNA sequencing and differential gene expression were used to investigate how the callus switches from proliferation to differentiation. Phylogenetic analysis and RNA in situ hybridization were used to understand whether transcriptional factors are involved in this transition. KEY RESULTS The callus formed on nascent leaves and subsequently developed the shoot pro-meristem and shoot meristem, thus completing indirect de novo shoot organogenesis in C. richardii. Genes were differentially expressed during the callus transition from proliferation to differentiation, indicating a role for photosynthesis, stimulus response and transmembrane signalling in this transition and the involvement of almost all cell layers that make up the callus. Transcriptional factors were either downregulated or upregulated, which were generally in many-to-many orthology with genes known to be involved in callus development in flowering plants, suggesting that the genetics of fern callus development are both conserved and divergent. Among them, an STM-like, a PLT-like and an ethylene- and salt-inducible ERF gene3-like gene were expressed simultaneously in the vasculature but not in the other parts of the callus, indicating that the vasculature played a role in the callus transition from proliferation to differentiation. CONCLUSIONS Indirect de novo shoot organogenesis could occur in ferns, and the callus transition from proliferation to differentiation required physiological changes, differential expression of transcriptional factors and involvement of the vasculature.
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Affiliation(s)
- Yuan-Le Xiao
- Laboratory of Plant Resource Conservation and Utilization, Jishou University, Jishou 416000, China
| | - Gui-Sheng Li
- Laboratory of Plant Resource Conservation and Utilization, Jishou University, Jishou 416000, China
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Kevei Z, Larriba E, Romero-Bosquet MD, Nicolás-Albujer M, Kurowski TJ, Mohareb F, Rickett D, Pérez-Pérez JM, Thompson AJ. Genes involved in auxin biosynthesis, transport and signalling underlie the extreme adventitious root phenotype of the tomato aer mutant. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2024; 137:76. [PMID: 38459215 PMCID: PMC10923741 DOI: 10.1007/s00122-024-04570-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 01/30/2024] [Indexed: 03/10/2024]
Abstract
The use of tomato rootstocks has helped to alleviate the soaring abiotic stresses provoked by the adverse effects of climate change. Lateral and adventitious roots can improve topsoil exploration and nutrient uptake, shoot biomass and resulting overall yield. It is essential to understand the genetic basis of root structure development and how lateral and adventitious roots are produced. Existing mutant lines with specific root phenotypes are an excellent resource to analyse and comprehend the molecular basis of root developmental traits. The tomato aerial roots (aer) mutant exhibits an extreme adventitious rooting phenotype on the primary stem. It is known that this phenotype is associated with restricted polar auxin transport from the juvenile to the more mature stem, but prior to this study, the genetic loci responsible for the aer phenotype were unknown. We used genomic approaches to define the polygenic nature of the aer phenotype and provide evidence that increased expression of specific auxin biosynthesis, transport and signalling genes in different loci causes the initiation of adventitious root primordia in tomato stems. Our results allow the selection of different levels of adventitious rooting using molecular markers, potentially contributing to rootstock breeding strategies in grafted vegetable crops, especially in tomato. In crops vegetatively propagated as cuttings, such as fruit trees and cane fruits, orthologous genes may be useful for the selection of cultivars more amenable to propagation.
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Affiliation(s)
- Zoltan Kevei
- Centre for Soil, AgriFood and Biosciences, Cranfield University, College Road, Bedfordshire, MK43 0AL, UK.
| | - Eduardo Larriba
- Instituto de Bioingeniería, Universidad Miguel Hernández, 03202, Elche, Spain
| | | | | | - Tomasz J Kurowski
- Centre for Soil, AgriFood and Biosciences, Cranfield University, College Road, Bedfordshire, MK43 0AL, UK
| | - Fady Mohareb
- Centre for Soil, AgriFood and Biosciences, Cranfield University, College Road, Bedfordshire, MK43 0AL, UK
| | - Daniel Rickett
- Syngenta Crop Protection, Jealott's Hill International Research Centre, Bracknell Berkshire, RG42 6EY, UK
| | | | - Andrew J Thompson
- Centre for Soil, AgriFood and Biosciences, Cranfield University, College Road, Bedfordshire, MK43 0AL, UK
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Cao H, Zhang X, Li F, Han Z, Guo X, Zhang Y. Glucosinolate O-methyltransferase mediated callus formation and affected ROS homeostasis in Arabidopsis thaliana. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2024; 30:109-121. [PMID: 38435856 PMCID: PMC10902236 DOI: 10.1007/s12298-023-01409-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 12/08/2023] [Accepted: 12/21/2023] [Indexed: 03/05/2024]
Abstract
Auxin-induced callus formation was largely dependent on the function of Lateral Organ Boundaries Domain (LBD) family transcription factors. We previously revealed that two IGMT (Indole glucosinolate oxy-methyl transferase) genes, IGMT2 and IGMT3, may be involved in the callus formation process as potential target genes of LBD29. Overexpression of the IGMT genes induces spontaneous callus formation. However, the details of the IGMT involvement in callus formation process were not well studied. IGMT1-4, but not IGMT5, are targeted and induced by LBD29 during the early stage of callus formation. Cell membrane and nucleus localized IGMT3 was mainly expressed in the elongation and maturation zones tissues of the primary root and lateral root, which could be further accumulated after CIM treatment. The igmts quadruple mutant, which obtained by CRISPR/Cas9 technology, exhibits a phenotype of attenuated callus formation. Enhanced indole glucosinolate anabolic pathway caused by IGMT1-4 overexpression promotes callus formation. In addition, the IGMT genes were involved in the reactive oxygen species homeostasis, which could be responsible for its role on callus formation. This study provides novel insights into the role of IGMTs gene-mediated callus formation. Activation of the Indole glucosinolate anabolic pathway is an inducing factor for plant callus initiation. Supplementary Information The online version contains supplementary material available at 10.1007/s12298-023-01409-2.
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Affiliation(s)
- Huifen Cao
- College of Agriculture and Life Science, Shanxi Datong University, Datong, 037009 Shanxi Province China
- Key Laboratory of Organic Dry Farming for Special Crops in Datong City, Datong, 037009 Shanxi Province China
| | - Xiao Zhang
- Key Laboratory of National Forest and Grass Administration for the Application of Graphene in Forestry, Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the Ministry of Education, Shanxi Datong University, Datong, 037009 Shanxi Province China
| | - Feng Li
- College of Agriculture and Life Science, Shanxi Datong University, Datong, 037009 Shanxi Province China
- Key Laboratory of Organic Dry Farming for Special Crops in Datong City, Datong, 037009 Shanxi Province China
| | - Zhiping Han
- College of Agriculture and Life Science, Shanxi Datong University, Datong, 037009 Shanxi Province China
- Key Laboratory of Organic Dry Farming for Special Crops in Datong City, Datong, 037009 Shanxi Province China
| | - Xuhu Guo
- College of Agriculture and Life Science, Shanxi Datong University, Datong, 037009 Shanxi Province China
| | - Yongfang Zhang
- College of Agriculture and Life Science, Shanxi Datong University, Datong, 037009 Shanxi Province China
- Key Laboratory of Organic Dry Farming for Special Crops in Datong City, Datong, 037009 Shanxi Province China
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Zhao H, Li X, Xiao X, Wang T, Liu L, Li C, Wu H, Shan Z, Wu Q. Evaluating Tartary Buckwheat Genotypes with High Callus Induction Rates and the Transcriptomic Profiling during Callus Formation. PLANTS (BASEL, SWITZERLAND) 2023; 12:3663. [PMID: 37960020 PMCID: PMC10647830 DOI: 10.3390/plants12213663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/19/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023]
Abstract
Due to their complex genotypes, low in vitro regeneration rates, and difficulty in obtaining transgenic plants, studies concerning basic biological research and molecular breeding in Tartary buckwheat (TB) are greatly limited. In this study, the hypocotyls of 60 genotypes of TB (TBC1~60) were used as explants. Of these, TBC14 was selected due to a high callus induction rate of 97.78% under dark and a proliferation coefficient (PC) of 28.2 when cultured on MS medium supplemented with 2.0 mg/L of 2,4-D and 1.5 mg/L of 6-BA. Subsequently, the samples of the calli obtained from TBC14 were collected at 0, 10, 20, and 30 d, and their transcriptomes were sequenced where identified. GO enrichment led to the detection of the most significant active gene set, which was the DNA binding transcription factor activity. The DEGs related to the pathways concerning metabolism, the biosynthesis of secondary metabolites, and hormone signal transduction were the most enriched in the KEGG database. The sets of MYB, AP2/ERF, and bHLH TFs exhibited the highest number of DEGs. Using this enrichment analysis, 421 genes encoding TFs, 47 auxin- and cytokinin-related genes, and 6 signal transduction-associated genes were screened that may play significant roles in callus formation (CF) in TB. Furthermore, FtPinG0008123200.01 (bZIP), a key gene promoting CF, was screened in terms of the weighted gene co-expression network associated with the various stages of CF. Our study not only provides valuable information about the molecular mechanism of CF but also reveals new genes involved in this process.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Qi Wu
- College of Life Science, Sichuan Agricultural University, No. 46, Xinkang Road, Ya’an 625014, China; (H.Z.); (X.L.); (X.X.); (T.W.); (L.L.); (C.L.); (H.W.); (Z.S.)
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Yuan J, Liu X, Zhao H, Wang Y, Wei X, Wang P, Zhan J, Liu L, Li F, Ge X. GhRCD1 regulates cotton somatic embryogenesis by modulating the GhMYC3-GhMYB44-GhLBD18 transcriptional cascade. THE NEW PHYTOLOGIST 2023; 240:207-223. [PMID: 37434324 DOI: 10.1111/nph.19120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 06/08/2023] [Indexed: 07/13/2023]
Abstract
Plant somatic embryogenesis (SE) is a multifactorial developmental process where embryos that can develop into whole plants are produced from somatic cells rather than through the fusion of gametes. The molecular regulation of plant SE, which involves the fate transition of somatic cells into embryogenic cells, is intriguing yet remains elusive. We deciphered the molecular mechanisms by which GhRCD1 interacts with GhMYC3 to regulate cell fate transitions during SE in cotton. While silencing of GhMYC3 had no discernible effect on SE, its overexpression accelerated callus formation, and proliferation. We identified two of GhMYC3 downstream SE regulators, GhMYB44 and GhLBD18. GhMYB44 overexpression was unconducive to callus growth but bolstered EC differentiation. However, GhLBD18 can be triggered by GhMYC3 but inhibited by GhMYB44, which positively regulates callus growth. On top of the regulatory cascade, GhRCD1 antagonistically interacts with GhMYC3 to inhibit the transcriptional function of GhMYC3 on GhMYB44 and GhLBD18, whereby a CRISPR-mediated rcd1 mutation expedites cell fate transition, resembling the effects of GhMYC3 overexpression. Furthermore, we showed that reactive oxygen species (ROS) are involved in SE regulation. Our findings elucidated that SE homeostasis is maintained by the tetrapartite module, GhRCD1-GhMYC3-GhMYB44-GhLBD18, which acts to modulate intracellular ROS in a temporal manner.
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Affiliation(s)
- Jiachen Yuan
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xingxing Liu
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
| | - Hang Zhao
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
- College of Life Sciences, Qufu Normal University, Qufu, 273165, China
| | - Ye Wang
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xi Wei
- Research Base of State Key Laboratory of Cotton Biology, Henan Normal University, Xinxiang, 453000, China
| | - Peng Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Jingjing Zhan
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Lisen Liu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Fuguang Li
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xiaoyang Ge
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
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Duan X, Chen L, Liu Y, Chen H, Wang F, Hu Y. Integrated physicochemical, hormonal, and transcriptomic analysis reveals the underlying mechanism of callus formation in Pinellia ternata hydroponic cuttings. FRONTIERS IN PLANT SCIENCE 2023; 14:1189499. [PMID: 37409296 PMCID: PMC10319145 DOI: 10.3389/fpls.2023.1189499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 05/30/2023] [Indexed: 07/07/2023]
Abstract
Introduction P. ternata is a perennial herb of the family Araceae that grows in China and has various medicinal properties and applications. At present, the artificial cultivation of P. ternata is constrained by seedling propagation. To address the problems of low seedling breeding propagation efficiency and high cost, our group has developed a highly efficient cultivation technology for "hydroponic cuttings of P. ternata "for the first time. P. ternata is used as the source material and is grown in a hydroponic system, increasing the seedling production rate 10-fold compared with the traditional cultivation mode. However, the callus formation mechanism in cuttings from hydroponic cultivation is still remains unclear. Methods In order to better understand the biological process of callus formation in cuttings from hydroponic P. ternata, anatomical characterization, endogenous hormone content determination and transcriptome sequencing were performed on five callus stages from early growth to early senescence. Results Regarding the four major hormones during the callus developmental stages of P. ternata hydroponic cuttings, cytokinins showed an increasing trend during callus formation. IAA(indole-3-acetic acid) and abscisic acid contents increased at 8d and then decreased, while jasmonic acid content gradually decreased. A total of 254137 unigenes were identified by transcriptome sequencing in five callus formation stages. Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis of the differentially expressed genes (DEGs) that differentially expressed unigenes were involved in various plant hormone signaling and hormone synthesis-related pathways. The expression patterns of 7 genes were validated using quantitative real-time PCR. Discussion This study presented integrated transcriptomic and metabolic analysis approach to obtain insights into the underlying biosynthetic mechanisms and function of key hormones involved in the callus formation process from hydroponic P. ternata cuttings.
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Affiliation(s)
| | | | | | - Hongping Chen
- *Correspondence: Hongping Chen, ; Fu Wang, ; Yuan Hu,
| | - Fu Wang
- *Correspondence: Hongping Chen, ; Fu Wang, ; Yuan Hu,
| | - Yuan Hu
- *Correspondence: Hongping Chen, ; Fu Wang, ; Yuan Hu,
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Li G, Cheng L, Li Z, Zhao Y, Wang Y. Over-expression of CcMYB24, encoding a R2R3-MYB transcription factor from a high-leaf-number mutant of Cymbidium, increases the number of leaves in Arabidopsis. PeerJ 2023; 11:e15490. [PMID: 37273531 PMCID: PMC10239231 DOI: 10.7717/peerj.15490] [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: 02/01/2023] [Accepted: 05/10/2023] [Indexed: 06/06/2023] Open
Abstract
Ornamental foliage plants have long been cultivated for their attractive leaves. Variation in leaf traits of ornamental foliage plants is one of the goals in breeding. MYB transcription factors regulate many aspects of leaf development, and thus influence morphological traits of leaves. However, little is known about the function of MYB transcription factors in leaf development of Cymbidium, one of the most economically important ornamental plants in the world. In the present study, a MYB transcription factor, CcMYB24, was identified and the corresponding gene cloned from a new orchid mutant, TRIR-2, which produces more leaves than control plants. The CcMYB24 showed a higher expression level in 'TRIR-2' than in control plants, and the protein was located in the nucleus. The sequence of CcMYB24 showed a high similarity with RAX2-like genes which belong to the R2R3-MYB gene family in other Cymbidium plants. Overexpression of CcMYB24 resulted in a phenotype with an increased number of leaves, elevated chlorophyll content, and decreased contents of carotenoids and flavonoids in Arabidopsis. These results provide functional evidence for the role of CcMYB24 in promoting the production of leaves in 'TRIR-2'. Understanding the role of CcMYB24 in Cymbidium will be beneficial for the molecular breeding of ornamental foliage plants.
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11
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Fal K, Berr A, Le Masson M, Faigenboim A, Pano E, Ishkhneli N, Moyal NL, Villette C, Tomkova D, Chabouté ME, Williams LE, Carles CC. Lysine 27 of histone H3.3 is a fine modulator of developmental gene expression and stands as an epigenetic checkpoint for lignin biosynthesis in Arabidopsis. THE NEW PHYTOLOGIST 2023; 238:1085-1100. [PMID: 36779574 DOI: 10.1111/nph.18666] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 11/28/2022] [Indexed: 06/18/2023]
Abstract
Chromatin is a dynamic platform within which gene expression is controlled by epigenetic modifications, notably targeting amino acid residues of histone H3. Among them is lysine 27 of H3 (H3K27), the trimethylation of which by the Polycomb Repressive Complex 2 (PRC2) is instrumental in regulating spatiotemporal patterns of key developmental genes. H3K27 is also subjected to acetylation and is found at sites of active transcription. Most information on the function of histone residues and their associated modifications in plants was obtained from studies of loss-of-function mutants for the complexes that modify them. To decrypt the genuine function of H3K27, we expressed a non-modifiable variant of H3 at residue K27 (H3.3K27A ) in Arabidopsis, and developed a multi-scale approach combining in-depth phenotypical and cytological analyses, with transcriptomics and metabolomics. We uncovered that the H3.3K27A variant causes severe developmental defects, part of them are reminiscent of PRC2 mutants, part of them are new. They include early flowering, increased callus formation and short stems with thicker xylem cell layer. This latest phenotype correlates with mis-regulation of phenylpropanoid biosynthesis. Overall, our results reveal novel roles of H3K27 in plant cell fates and metabolic pathways, and highlight an epigenetic control point for elongation and lignin composition of the stem.
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Affiliation(s)
- Kateryna Fal
- Plant and Cell Physiology Lab, IRIG-DBSCI-LPCV, CEA, Grenoble Alpes University - CNRS - INRAE - CEA, 17 rue des Martyrs, bât. C2, 38054, Grenoble Cedex 9, France
| | - Alexandre Berr
- Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084, Strasbourg Cedex, France
| | - Marie Le Masson
- Plant and Cell Physiology Lab, IRIG-DBSCI-LPCV, CEA, Grenoble Alpes University - CNRS - INRAE - CEA, 17 rue des Martyrs, bât. C2, 38054, Grenoble Cedex 9, France
| | - Adi Faigenboim
- Institute of Plant Sciences, ARO Volcani Center, PO Box 15159, Rishon LeZion, 7528809, Israel
| | - Emeline Pano
- Plant and Cell Physiology Lab, IRIG-DBSCI-LPCV, CEA, Grenoble Alpes University - CNRS - INRAE - CEA, 17 rue des Martyrs, bât. C2, 38054, Grenoble Cedex 9, France
| | - Nickolay Ishkhneli
- Robert H. Smith Institute of Plant Sciences & Genetics in Agriculture - Hebrew University of Jerusalem, Rehovot, 76100, Israel
| | - Netta-Lee Moyal
- Robert H. Smith Institute of Plant Sciences & Genetics in Agriculture - Hebrew University of Jerusalem, Rehovot, 76100, Israel
| | - Claire Villette
- Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084, Strasbourg Cedex, France
| | - Denisa Tomkova
- Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084, Strasbourg Cedex, France
| | - Marie-Edith Chabouté
- Institut de Biologie Moléculaire des Plantes du CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084, Strasbourg Cedex, France
| | - Leor Eshed Williams
- Robert H. Smith Institute of Plant Sciences & Genetics in Agriculture - Hebrew University of Jerusalem, Rehovot, 76100, Israel
| | - Cristel C Carles
- Plant and Cell Physiology Lab, IRIG-DBSCI-LPCV, CEA, Grenoble Alpes University - CNRS - INRAE - CEA, 17 rue des Martyrs, bât. C2, 38054, Grenoble Cedex 9, France
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12
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Wu M, He W, Wang L, Zhang X, Wang K, Xiang Y. PheLBD29, an LBD transcription factor from Moso bamboo, causes leaf curvature and enhances tolerance to drought stress in transgenic Arabidopsis. JOURNAL OF PLANT PHYSIOLOGY 2023; 280:153865. [PMID: 36459885 DOI: 10.1016/j.jplph.2022.153865] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 06/17/2023]
Abstract
The lateral organ boundaries domain (LBD), a unique family of transcription factors in higher plants, plays a key role in plant growth and development, and stress response. Here, we report on the novel lateral organ boundaries domain (LBD) gene PheLBD29, a nuclear localization protein that can bind the conserved GCCCCG sequence, as determined by electrophoretic mobility shift assay (EMSA). PheLBD29 was highly expressed in blade leaf and significantly induced by polyethylene glycol (PEG). Overexpression of PheLBD29 leads to small and abaxially rolled leaves in Arabidopsis, and anatomically, 35S:PheLBD29 Arabidopsis leaves showed transformation of adaxial cells into abaxial cells. Moreover, overexpression of PheLBD29 in Arabidopsis increased plant tolerance to drought stress, by accumulation of more soluble sugars, less malondialdehyde (MDA), and had lower REL levels under drought stress. Transient expression assay revealed PheLBD29 directly bound to the promoter region of RAB18. In addition, 35S:PheLBD29 Arabidopsis showed higher sensitivity to abscisic acid (ABA) than the wild type. Therefore, we conclude that PheLBD29 may participate in the ABA-dependent signaling pathway to improve drought tolerance. Our study provides new evidence for a Moso bamboo LBD protein regulatory module in leaf curvature and drought resistance.
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Affiliation(s)
- Min Wu
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Wei He
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Linna Wang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Xiaoyue Zhang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Kang Wang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China
| | - Yan Xiang
- Laboratory of Modern Biotechnology, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei, 230036, China.
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13
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Larriba E, Nicolás-Albujer M, Sánchez-García AB, Pérez-Pérez JM. Identification of Transcriptional Networks Involved in De Novo Organ Formation in Tomato Hypocotyl Explants. Int J Mol Sci 2022; 23:16112. [PMID: 36555756 PMCID: PMC9788163 DOI: 10.3390/ijms232416112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/09/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Some of the hormone crosstalk and transcription factors (TFs) involved in wound-induced organ regeneration have been extensively studied in the model plant Arabidopsis thaliana. In previous work, we established Solanum lycopersicum "Micro-Tom" explants without the addition of exogenous hormones as a model to investigate wound-induced de novo organ formation. The current working model indicates that cell reprogramming and founder cell activation requires spatial and temporal regulation of auxin-to-cytokinin (CK) gradients in the apical and basal regions of the hypocotyl combined with extensive metabolic reprogramming of some cells in the apical region. In this work, we extended our transcriptomic analysis to identify some of the gene regulatory networks involved in wound-induced organ regeneration in tomato. Our results highlight a functional conservation of key TF modules whose function is conserved during de novo organ formation in plants, which will serve as a valuable resource for future studies.
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14
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Dong H, Zheng Q, Zhou Y, Zhou Y, Bao Z, Lan Q, Li X. MdWOX4-2 modulated MdLBD41 functioning in adventitious shoot of apple (Malus domestica). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 186:11-18. [PMID: 35797915 DOI: 10.1016/j.plaphy.2022.06.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 06/23/2022] [Accepted: 06/24/2022] [Indexed: 06/15/2023]
Abstract
Apple (Malus domestica Borkh.) is not only an important fruit crop distributed worldwide, but also a common model plant. However, the lack of efficient genetic transformation procedures for apples limits the in-depth studies of their gene functions. Although leaf-regenerated adventitious shoots (LRAS) are a prerequisite for successful genetic transformation of apple, little is known about the underlying molecular mechanism of LRAS. Here, we identified the WUSCHEL-related homeobox (WOX) transcription factor in apple, MdWOX4-2, which was a transcriptional activator. Gene expression as well as morphological and histological observations revealed that MdWOX4-2 is involved in the development of LRAS. Overexpression of MdWOX4-2 conferred higher regenerative capacity in transgenic tobacco (Nicotiana tabacum) as compared to the wild type (WT). The combined results of the yeast one-hybrid (Y1H), electrophoretic mobility shift assay (EMSA), dual luciferase assays, and transient transactivation assay, revealed that MdWOX4-2 directly bound to and activated the MdLBD41 promoter. Moreover, transgenic experiments further demonstrated that MdLBD41 could significantly enhance the formation of adventitious shoot in transgenic tobacco. Collectively, our findings demonstrate that MdWOX4-2 is important for regulating the LRAS development by activating MdLBD41.
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Affiliation(s)
- Haiqiang Dong
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Qingbo Zheng
- Key Laboratory of Plant Molecular Physiology, CAS Center for Excellence in Molecular Plant Sciences, Institute of Botany, Chinese Academy of Sciences, Beijing, 10093, China
| | - Yufei Zhou
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Yuwen Zhou
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Zeyang Bao
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Qingqing Lan
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China
| | - Xu Li
- College of Biological and Environmental Sciences, Zhejiang Wanli University, Ningbo, Zhejiang, 315100, China; College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China.
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15
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Shi L, Chen Y, Hong J, Shen G, Schreiber L, Cohen H, Zhang D, Aharoni A, Shi J. AtMYB31 is a wax regulator associated with reproductive development in Arabidopsis. PLANTA 2022; 256:28. [PMID: 35781548 DOI: 10.1007/s00425-022-03945-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
AtMYB31, a R2R3-MYB transcription factor that modulates wax biosynthesis in reproductive tissues, is involved in seed development in Arabidopsis. R2R3-MYB transcription factors play important roles in plant development; yet, the exact role of each of them remains to be resolved. Here we report that the Arabidopsis AtMYB31 is required for wax biosynthesis in epidermis of reproductive tissues, and is involved in seed development. AtMYB31 was ubiquitously expressed in both vegetative and reproductive tissues with higher expression levels in siliques and seeds, while AtMYB31 was localized to the nucleus and cytoplasm. Loss of function of AtMYB31 reduced wax accumulation in the epidermis of silique and flower tissues, disrupted seed coat epidermal wall development and mucilage production, altered seed proanthocyanidin and polyester content. AtMYB31 could direct activate expressions of several wax biosynthetic target genes. Altogether, AtMYB31, a R2R3-MYB transcription factor, regulates seed development in Arabidopsis.
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Affiliation(s)
- Lei Shi
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuqin Chen
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jun Hong
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Gaodian Shen
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lukas Schreiber
- Institute of Cellular and Molecular Botany, University of Bonn, 53115, Bonn, Germany
| | - Hagai Cohen
- Institute of Plant Sciences, Agricultural Research Organization, 7505101, Rishon LeZion, Israel
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Asaph Aharoni
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, 76100, Rehovot, Israel.
| | - Jianxin Shi
- Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China.
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16
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Gu H, Ding W, Shi T, Ouyang Q, Yang X, Yue Y, Wang L. Integrated transcriptome and endogenous hormone analysis provides new insights into callus proliferation in Osmanthus fragrans. Sci Rep 2022; 12:7609. [PMID: 35534621 PMCID: PMC9085794 DOI: 10.1038/s41598-022-11801-9] [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: 02/14/2022] [Accepted: 04/22/2022] [Indexed: 11/09/2022] Open
Abstract
Osmanthus fragrans is an important evergreen species with both medicinal and ornamental value in China. Given the low efficiency of callus proliferation and the difficulty of adventitious bud differentiation, tissue culture and regeneration systems have not been successfully established for this species. To understand the mechanism of callus proliferation, transcriptome sequencing and endogenous hormone content determination were performed from the initial growth stages to the early stages of senescence on O. fragrans calli. In total, 47,340 genes were identified by transcriptome sequencing, including 1798 previously unidentified genes specifically involved in callus development. Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of differentially expressed genes (DEGs) was significantly enriched in plant hormone signal transduction pathways. Furthermore, our results from the orthogonal projections to latent structures discrimination analysis (OPLS-DA) of six typical hormones in five development stages of O. fragrans calli showed jasmonic acid (JA) could play important role in the initial stages of calli growth, whereas JA and auxin (IAA) were dominant in the early stages of calli senescence. Based on the weighted gene co-expression network analysis, OfSRC2, OfPP2CD5 and OfARR1, OfPYL3, OfEIL3b were selected as hub genes from the modules with the significant relevance to JA and IAA respectively. The gene regulation network and quantitative real-time PCR implied that during the initial stages of callus growth, the transcription factors (TFs) OfERF4 and OfMYC2a could down-regulate the expression of hub genes OfSRC2 and OfPP2CD5, resulting in decreased JA content and rapid callus growth; during the late stage of callus growth, the TFs OfERF4, OfMYC2a and OfTGA21c, OfHSFA1 could positively regulate the expression of hub genes OfSRC2, OfPP2CD5 and OfARR1, OfPYL3, OfEIL3b, respectively, leading to increased JA and IAA contents and inducing the senescence of O. fragrans calli. Hopefully, our results could provide new insights into the molecular mechanism of the proliferation of O. fragrans calli.
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17
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Zhang Y, Yang X, Nvsvrot T, Huang L, Cai G, Ding Y, Ren W, Wang N. The transcription factor WRKY75 regulates the development of adventitious roots, lateral buds and callus by modulating hydrogen peroxide content in poplar. JOURNAL OF EXPERIMENTAL BOTANY 2022; 73:1483-1498. [PMID: 34791155 DOI: 10.1093/jxb/erab501] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
Hydrogen peroxide (H2O2) plays important roles in plant development. Adventitious roots (AR), lateral buds (LB) and callus formation are important traits for plants. Here, a gene encoding RESPIRATORY BURST OXIDASE HOMOLOG B (PdeRBOHB) from poplar line 'NL895' (Populus. deltoides × P. euramericana) was predicted to be involved in H2O2 accumulation, and lines with reduced expression were generated. H2O2 content was decreased, and the development of adventitious roots, lateral buds, and callus was inhibited in reduced expression PdeRBOHB lines. A gene encoding PdeWRKY75 was identified as the upstream transcription factor positively regulating PdeRBOHB. This regulation was confirmed by dual luciferase reporter assay, GUS transient expression analysis and electrophoretic mobility shift assay. In the reduced expression PdeWRKY75 lines, H2O2 content was decreased and the development of adventitious roots, lateral buds, and callus development was inhibited, while in the overexpression lines, H2O2 content was increased and the development of adventitious roots and lateral buds was inhibited, but callus formation was enhanced. Additionally, reduced expression PdeRBOHB lines showed lowered expression of PdeWRKY75, while exogenous application of H2O2 showed the opposite effect. Together, these results suggest that PdeWRKY75 and PdeRBOHB are part of a regulatory module in H2O2 accumulation, which is involved in the regulation of multiple biological processes.
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Affiliation(s)
- Yan Zhang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Xiaoqing Yang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Tashbek Nvsvrot
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Liyu Huang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Guanghua Cai
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Yiwei Ding
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Wenyu Ren
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
| | - Nian Wang
- College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China
- Hubei Engineering Technology Research Center for Forestry Information, Huazhong Agricultural University, Wuhan, 430070, China
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18
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Zhang M, Wang J, Luo Q, Yang C, Yang H, Cheng Y. CsMYB96 enhances citrus fruit resistance against fungal pathogen by activating salicylic acid biosynthesis and facilitating defense metabolite accumulation. JOURNAL OF PLANT PHYSIOLOGY 2021; 264:153472. [PMID: 34315028 DOI: 10.1016/j.jplph.2021.153472] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 07/11/2021] [Accepted: 07/11/2021] [Indexed: 05/21/2023]
Abstract
Citrus fruit are generally confronted with various fungal diseases that cause fruit deterioration and economic loss. Salicylic acid (SA), a plant hormone, is an important signal molecule required for stimulating the disease resistance of plants. However, there has been limited information about the molecular mechanism of SA biosynthesis involving biotic stress response in citrus fruit. In the present study, an R2R3 MYB transcription factor (CsMYB96) was identified to mediate SA signaling in response to fungal diseases. The transient overexpression assay revealed that CsMYB96 contributed to the strong tolerance of citrus fruit to Penicillium italicum along with an increase in SA content; meanwhile, CsMYB96 conferred resistance to Botrytis cinerea in Arabidopsis plants. Further metabolomic profiling of stable transgenic Arabidopsis revealed that CsMYB96 participated in the regulation of various metabolism pathways and enhanced the accumulation of phenolic acids. RNA-seq analysis confirmed that overexpression of CsMYB96 activated the expression of genes involved in plant-pathogen interaction, phenylpropanoid biosynthesis, and SA signaling. Besides, CsMBY96 directly activated the transcription of calmodulin binding protein 60g (CsCBP60g), a predominant transcription factor required for the activation of SA signaling. In summary, our results reveal that CsMYB96 promotes SA biosynthesis and the accumulation of defense metabolites to enhance the fungal pathogen resistance of citrus fruit and Arabidopsis and provide new insights into the regulation of disease response.
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Affiliation(s)
- Mingfei Zhang
- National R&D Centre for Citrus Preservation, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
| | - Jinqiu Wang
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), School of Food and Biological Engineering, Chengdu University, No. 2025 Chengluo Avenue, Chengdu, 610106, China.
| | - Qujuan Luo
- National R&D Centre for Citrus Preservation, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
| | - Ce Yang
- National R&D Centre for Citrus Preservation, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
| | - Hongbin Yang
- National R&D Centre for Citrus Preservation, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
| | - Yunjiang Cheng
- National R&D Centre for Citrus Preservation, Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan, 430070, PR China.
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Wen B, Li J, Luo Y, Zhang X, Wang K, Liu Z, Huang J. Identification and expression profiling of MYB transcription factors related to l-theanine biosynthesis in Camellia sinensis. Int J Biol Macromol 2020; 164:4306-4317. [PMID: 32861783 DOI: 10.1016/j.ijbiomac.2020.08.200] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 08/26/2020] [Accepted: 08/26/2020] [Indexed: 12/20/2022]
Abstract
The MYB proteins belong to a large family of transcription factors in plant genomes and play significant roles in primary and secondary metabolism. Although several CsMYB genes have been identified in Camellia sinensis, few CsMYBs involved in l-theanine biosynthesis have been analyzed. In this study, we screened and identified 20 CsMYBs related to l-theanine biosynthesis. Transcriptomic analysis revealed that the expression profiles of the CsMYBs were positively or negatively related to dynamic changes in the l-theanine content. Validation of selected l-theanine biosynthetic and CsMYB genes was conducted by qRT-PCR. The results illustrated that most of the structural and CsMYB genes were downregulated with a decrease in the l-theanine levels. Protein-protein interaction networks of CsMYB5, CsMYB12 and CsMYB94 proteins demonstrated that they might form complexes with bHLH and WD 40 proteins. Multiple DNA-binding sites of the R2R3-MYB protein were observed in promoter regions of structural genes, indicating CsMYB family proteins might be involved in l-theanine metabolism via the attachment of AC elements. Moreover, CsMYB73 demonstrated binding specificity to the promoter region of CsGDH2 (CsGDH2-pro). These findings provide fundamental understanding of specific members of the CsMYBs related to the l-theanine biosynthesis pathway.
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Affiliation(s)
- Beibei Wen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China
| | - Juan Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Co-innovation Center for Utilization of Botanical Functional Ingredients and Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, Hunan 410128, PR China
| | - Yong Luo
- School of Chemistry, Biology and Environmental Engineering, Xiangnan University, Chenzhou, Hunan 423000, PR China
| | - Xiangna Zhang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China
| | - Kunbo Wang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Co-innovation Center for Utilization of Botanical Functional Ingredients and Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Co-innovation Center for Utilization of Botanical Functional Ingredients and Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
| | - Jianan Huang
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, Hunan 410128, PR China; National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Hunan Co-innovation Center for Utilization of Botanical Functional Ingredients and Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, Hunan 410128, PR China.
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20
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Ibáñez S, Carneros E, Testillano PS, Pérez-Pérez JM. Advances in Plant Regeneration: Shake, Rattle and Roll. PLANTS (BASEL, SWITZERLAND) 2020; 9:E897. [PMID: 32708602 PMCID: PMC7412315 DOI: 10.3390/plants9070897] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 01/23/2023]
Abstract
Some plant cells are able to rebuild new organs after tissue damage or in response to definite stress treatments and/or exogenous hormone applications. Whole plants can develop through de novo organogenesis or somatic embryogenesis. Recent findings have enlarged our understanding of the molecular and cellular mechanisms required for tissue reprogramming during plant regeneration. Genetic analyses also suggest the key role of epigenetic regulation during de novo plant organogenesis. A deeper understanding of plant regeneration might help us to enhance tissue culture optimization, with multiple applications in plant micropropagation and green biotechnology. In this review, we will provide additional insights into the physiological and molecular framework of plant regeneration, including both direct and indirect de novo organ formation and somatic embryogenesis, and we will discuss the key role of intrinsic and extrinsic constraints for cell reprogramming during plant regeneration.
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Grants
- BIO2015-64255-R Ministerio de Economía, Industria y Competitividad, Gobierno de España
- RTI2018-096505-B-I00 Ministerio de Economía, Industria y Competitividad, Gobierno de España
- AGL2017-82447-R Ministerio de Economía, Industria y Competitividad, Gobierno de España
- IDIFEDER 2018/016 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
- PROMETEO/2019/117 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
- ACIF/2018/220 Conselleria de Cultura, Educación y Ciencia, Generalitat Valenciana
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Affiliation(s)
- Sergio Ibáñez
- Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain;
| | - Elena Carneros
- Pollen Biotechnology of Crop Plants Group, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.C.); (P.S.T.)
| | - Pilar S. Testillano
- Pollen Biotechnology of Crop Plants Group, Margarita Salas Center of Biological Research, CIB Margarita Salas-CSIC, Ramiro de Maeztu 9, 28040 Madrid, Spain; (E.C.); (P.S.T.)
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