1
|
Zhao H, Shin D, Zhu Y, Kim J. Bridging the Knowledge Gap: Utilization of Mediator Subunits for Crop Improvement. PLANT, CELL & ENVIRONMENT 2024. [PMID: 39254322 DOI: 10.1111/pce.15142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2024] [Revised: 08/16/2024] [Accepted: 08/22/2024] [Indexed: 09/11/2024]
Abstract
The Mediator complex is a multisubunit transcription coregulator that transfers regulatory signals from different transcription factors to RNA polymerase II (Pol II) to control Pol II-dependent transcription in eukaryotes. Studies on Arabidopsis Mediator subunits have revealed their unique or overlapping functions in various aspects of plant growth, stress adaptation and metabolite homeostasis. Therefore, the utilization of the plant Mediator complex for crop improvement has been of great interest. Advances in genome editing and sequencing techniques have expedited the characterization of Mediator subunits in economically important crops such as tomato, rice, wheat, soybean, sugarcane, pea, chickpea, rapeseed and hop. In this review, we summarize recent progress in understanding the molecular mechanisms of how the Mediator complex regulates crop growth, development and adaptation to environmental stress. We also discuss the conserved and diverse functions of the Mediator complex in different plant species. In addition, we propose several future research directions to deepen our understanding of the important roles of Mediator subunits and their interacting proteins, which would provide promising targets for genetic modification to develop new cultivars with desirable agronomic traits.
Collapse
Affiliation(s)
- Haohao Zhao
- Horticultural Sciences Department, University of Florida, Gainesville, Florida, USA
| | - Doosan Shin
- Horticultural Sciences Department, University of Florida, Gainesville, Florida, USA
| | - Yingfang Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, China
- Sanya Institute of Henan University, Sanya, Hainan, China
| | - Jeongim Kim
- Horticultural Sciences Department, University of Florida, Gainesville, Florida, USA
- Plant Molecular and Cellular Biology Graduate Program, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
2
|
Xu R, Chong L, Zhu Y. Mediator kinase subunit CDK8 phosphorylates transcription factor TCP15 during tomato pollen development. PLANT PHYSIOLOGY 2024; 195:865-878. [PMID: 38365204 DOI: 10.1093/plphys/kiae079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Revised: 11/28/2023] [Accepted: 12/19/2023] [Indexed: 02/18/2024]
Abstract
Pollen development in flowering plants has strong implications for reproductive success. Pollen DNA can be targeted to improve plant traits for yield and stress tolerance. In this study, we demonstrated that the Mediator subunit CYCLIN-DEPENDENT KINASE 8 (CDK8) is a key modulator of pollen development in tomato (Solanum lycopersicum). SlCDK8 knockout led to significant decreases in pollen viability, fruit yield, and fruit seed number. We also found that SlCDK8 directly interacts with transcription factor TEOSINTE BRANCHED1-CYCLOIDEA-PCF15 (SlTCP15) using yeast two-hybrid screens. We subsequently showed that SlCDK8 phosphorylates Ser 187 of SlTCP15 to promote SlTCP15 stability. Phosphorylated TCP15 directly bound to the TGGGCY sequence in the promoters of DYSFUNCTIONAL TAPETUM 1 (SlDYT1) and MYB DOMAIN PROTEIN 103 (SlMYB103), which are responsible for pollen development. Consistently, disruption of SlTCP15 resembled slcdk8 tomato mutants. In sum, our work identified a new substrate of Mediator CDK8 and revealed an important regulatory role of SlCDK8 in pollen development via cooperation with SlTCP15.
Collapse
Affiliation(s)
- Rui Xu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475001, China
| | - Leelyn Chong
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475001, China
| | - Yingfang Zhu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475001, China
- Sanya Institute of Henan University, Sanya, Hainan 570203, China
| |
Collapse
|
3
|
Liang L, Wang D, Xu D, Xiao J, Tang W, Song X, Yu G, Liang Z, Xie M, Xu Z, Sun B, Tang Y, Huang Z, Lai Y, Li H. Comparative phylogenetic analysis of the mediator complex subunit in asparagus bean (Vigna unguiculata ssp. sesquipedialis) and its expression profile under cold stress. BMC Genomics 2024; 25:149. [PMID: 38321384 PMCID: PMC10848533 DOI: 10.1186/s12864-024-10060-4] [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: 08/28/2023] [Accepted: 01/29/2024] [Indexed: 02/08/2024] Open
Abstract
BACKGROUND The mediator complex subunits (MED) constitutes a multiprotein complex, with each subunit intricately involved in crucial aspects of plant growth, development, and responses to stress. Nevertheless, scant reports pertain to the VunMED gene within the context of asparagus bean (Vigna unguiculata ssp. sesquipedialis). Establishing the identification and exploring the responsiveness of VunMED to cold stress forms a robust foundation for the cultivation of cold-tolerant asparagus bean cultivars. RESULTS Within this study, a comprehensive genome-wide identification of VunMED genes was executed in the asparagus bean cultivar 'Ningjiang3', resulting in the discovery of 36 distinct VunMED genes. A phylogenetic analysis encompassing 232 MED genes from diverse species, including Arabidopsis, tomatoes, soybeans, mung beans, cowpeas, and asparagus beans, underscored the highly conserved nature of MED gene sequences. Throughout evolutionary processes, each VunMED gene underwent purification and neutral selection, with the exception of VunMED19a. Notably, VunMED9/10b/12/13/17/23 exhibited structural variations discernible across four cowpea species. Divergent patterns of temporal and spatial expression were evident among VunMED genes, with a prominent role attributed to most genes during early fruit development. Additionally, an analysis of promoter cis-acting elements was performed, followed by qRT-PCR assessments on roots, stems, and leaves to gauge relative expression after exposure to cold stress and subsequent recovery. Both treatments induced transcriptional alterations in VunMED genes, with particularly pronounced effects observed in root-based genes following cold stress. Elucidating the interrelationships between subunits involved a preliminary understanding facilitated by correlation and principal component analyses. CONCLUSIONS This study elucidates the pivotal contribution of VunMED genes to the growth, development, and response to cold stress in asparagus beans. Furthermore, it offers a valuable point of reference regarding the individual roles of MED subunits.
Collapse
Affiliation(s)
- Le Liang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Dong Wang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Dongmei Xu
- Mianyang Academy of Agricultural Sciences, Mianyang, 621000, China
| | - Jiachang Xiao
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Wen Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xueping Song
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guofeng Yu
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zongxu Liang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Minghui Xie
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zeping Xu
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Bo Sun
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yi Tang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhi Huang
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yunsong Lai
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China
| | - Huanxiu Li
- College of Horticulture, Sichuan Agricultural University, Chengdu, 611130, China.
| |
Collapse
|
4
|
Baranov D, Dolgov S, Timerbaev V. New Advances in the Study of Regulation of Tomato Flowering-Related Genes Using Biotechnological Approaches. PLANTS (BASEL, SWITZERLAND) 2024; 13:359. [PMID: 38337892 PMCID: PMC10856997 DOI: 10.3390/plants13030359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/21/2024] [Accepted: 01/24/2024] [Indexed: 02/12/2024]
Abstract
The tomato is a convenient object for studying reproductive processes, which has become a classic. Such complex processes as flowering and fruit setting require an understanding of the fundamental principles of molecular interaction, the structures of genes and proteins, the construction of signaling pathways for transcription regulation, including the synchronous actions of cis-regulatory elements (promoter and enhancer), trans-regulatory elements (transcription factors and regulatory RNAs), and transposable elements and epigenetic regulators (DNA methylation and acetylation, chromatin structure). Here, we discuss the current state of research on tomatoes (2017-2023) devoted to studying the function of genes that regulate flowering and signal regulation systems using genome-editing technologies, RNA interference gene silencing, and gene overexpression, including heterologous expression. Although the central candidate genes for these regulatory components have been identified, a complete picture of their relationship has yet to be formed. Therefore, this review summarizes the latest achievements related to studying the processes of flowering and fruit set. This work attempts to display the gene interaction scheme to better understand the events under consideration.
Collapse
Affiliation(s)
- Denis Baranov
- Laboratory of Expression Systems and Plant Genome Modification, Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (D.B.); (S.D.)
- Laboratory of Plant Genetic Engineering, All-Russia Research Institute of Agricultural Biotechnology, 127550 Moscow, Russia
| | - Sergey Dolgov
- Laboratory of Expression Systems and Plant Genome Modification, Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (D.B.); (S.D.)
- Laboratory of Plant Genetic Engineering, All-Russia Research Institute of Agricultural Biotechnology, 127550 Moscow, Russia
| | - Vadim Timerbaev
- Laboratory of Expression Systems and Plant Genome Modification, Branch of Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia; (D.B.); (S.D.)
- Laboratory of Plant Genetic Engineering, All-Russia Research Institute of Agricultural Biotechnology, 127550 Moscow, Russia
| |
Collapse
|
5
|
Quevedo-Colmena AS, Ortiz-Atienza A, Jáquez-Gutiérrez M, Quinet M, Atarés A, Yuste-Lisbona FJ, Moreno V, Angosto T, Lozano R. Loss of function mutations at the tomato SSI2 locus impair plant growth and development by altering the fatty acid desaturation pathway. PLANT BIOLOGY (STUTTGART, GERMANY) 2024; 26:106-116. [PMID: 37983594 DOI: 10.1111/plb.13591] [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: 05/28/2023] [Accepted: 10/24/2023] [Indexed: 11/22/2023]
Abstract
The stearoyl-ACP desaturase (SACPD) is a key enzyme in the regulation of saturated to unsaturated fatty acid ratio, playing a crucial role in regulating membrane stability and fluidity, as well as photosynthesis efficiency, which makes it an important research focus in crop species. This study reports the characterization and molecular cloning of pale dwarf (pad), a new tomato (Solanum lycopersicum L.) T-DNA recessive mutant, which exhibits a dwarf and chlorotic phenotype. Functional studies of the T-DNA tagged gene were conducted, including phylogenetic analysis, expression and metabolomic analyses, and generation of CRISPR/Cas9 knockout lines. The cloning of T-DNA flanking genomic sequences and a co-segregation analysis found the pad phenotype was caused by a T-DNA insertion disrupting the tomato homologue of the Arabidopsis SUPPRESSOR OF SALICYLIC ACID INSENSITIVITY 2 (SlSSI2), encoding a plastid localized isoform of SACPD. The phenotype of CRISPR/Cas9 SlSSI2 knockout lines confirmed that the morphological abnormalities in pad plants were due to SlSSI2 loss of function. Functional, metabolomic and expression analyses proved that SlSSI2 disruption causes deficiencies in 18:1 fatty acid desaturation and leads to diminished jasmonic acid (JA) content and increased salicylic acid (SA) levels. Overall, these results proved that SSI2 plays a crucial role in the regulation of polyunsaturated fatty acid profiles in tomato, and revealed that SlSSI2 loss of function results in an inhibited JA-responsive signalling pathway and a constitutively activated SA-mediated defence signalling response. This study lays the foundation for further research on tomato SACPDs and their role in plant performance and fitness.
Collapse
Affiliation(s)
- A S Quevedo-Colmena
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, Almería, Spain
| | - A Ortiz-Atienza
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, Almería, Spain
| | - M Jáquez-Gutiérrez
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - M Quinet
- Université catholique de Louvain, Ottignies-Louvain-la-Neuve, Belgium
| | - A Atarés
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - F J Yuste-Lisbona
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, Almería, Spain
| | - V Moreno
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - T Angosto
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, Almería, Spain
| | - R Lozano
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, Almería, Spain
| |
Collapse
|
6
|
Wu M, Zhang Q, Wu G, Zhang L, Xu X, Hu X, Gong Z, Chen Y, Li Z, Li H, Deng W. SlMYB72 affects pollen development by regulating autophagy in tomato. HORTICULTURE RESEARCH 2023; 10:uhac286. [PMID: 36938568 PMCID: PMC10015339 DOI: 10.1093/hr/uhac286] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 12/15/2022] [Indexed: 06/18/2023]
Abstract
The formation and development of pollen are among the most critical processes for reproduction and genetic diversity in the life cycle of flowering plants. The present study found that SlMYB72 was highly expressed in the pollen and tapetum of tomato flowers. Downregulation of SlMYB72 led to a decrease in the amounts of seeds due to abnormal pollen development compared with wild-type plants. Downregulation of SlMYB72 delayed tapetum degradation and inhibited autophagy in tomato anther. Overexpression of SlMYB72 led to abnormal pollen development and delayed tapetum degradation. Expression levels of some autophagy-related genes (ATGs) were decreased in SlMYB72 downregulated plants and increased in overexpression plants. SlMYB72 was directly bound to ACCAAC/ACCAAA motif of the SlATG7 promoter and activated its expression. Downregulation of SlATG7 inhibited the autophagy process and tapetum degradation, resulting in abnormal pollen development in tomatoes. These results indicated SlMYB72 affects the tapetum degradation and pollen development by transcriptional activation of SlATG7 and autophagy in tomato anther. The study expands the understanding of the regulation of autophagy by SlMYB72, uncovers the critical role that autophagy plays in pollen development, and provides potential candidate genes for the production of male-sterility in plants.
Collapse
Affiliation(s)
| | | | - Guanle Wu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Lu Zhang
- Department of Horticulture and Landscape Architecture, Oklahoma State University, Stillwater, OK 74078, USA
| | - Xin Xu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Xiaowei Hu
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Zehao Gong
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Yulin Chen
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | - Zhengguo Li
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing 400044, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, 401331 Chongqing, China
| | | | - Wei Deng
- Corresponding authors. E-mails: ;
| |
Collapse
|
7
|
Micol-Ponce R, García-Alcázar M, Lebrón R, Capel C, Pineda B, García-Sogo B, Alché JDD, Ortiz-Atienza A, Bretones S, Yuste-Lisbona FJ, Moreno V, Capel J, Lozano R. Tomato POLLEN DEFICIENT 2 encodes a G-type lectin receptor kinase required for viable pollen grain formation. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:178-193. [PMID: 36260406 PMCID: PMC9786849 DOI: 10.1093/jxb/erac419] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 10/18/2022] [Indexed: 05/16/2023]
Abstract
Pollen development is a crucial biological process indispensable for seed set in flowering plants and for successful crop breeding. However, little is known about the molecular mechanisms regulating pollen development in crop species. This study reports a novel male-sterile tomato mutant, pollen deficient 2 (pod2), characterized by the production of non-viable pollen grains and resulting in the development of small parthenocarpic fruits. A combined strategy of mapping-by-sequencing and RNA interference-mediated gene silencing was used to prove that the pod2 phenotype is caused by the loss of Solanum lycopersicum G-type lectin receptor kinase II.9 (SlG-LecRK-II.9) activity. In situ hybridization of floral buds showed that POD2/SlG-LecRK-II.9 is specifically expressed in tapetal cells and microspores at the late tetrad stage. Accordingly, abnormalities in meiosis and tapetum programmed cell death in pod2 occurred during microsporogenesis, resulting in the formation of four dysfunctional microspores leading to an aberrant microgametogenesis process. RNA-seq analyses supported the existence of alterations at the final stage of microsporogenesis, since we found tomato deregulated genes whose counterparts in Arabidopsis are essential for the normal progression of male meiosis and cytokinesis. Collectively, our results revealed the essential role of POD2/SlG-LecRK-II.9 in regulating tomato pollen development.
Collapse
Affiliation(s)
| | | | - Ricardo Lebrón
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | - Carmen Capel
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | - Benito Pineda
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, 46011 Valencia, Spain
| | - Begoña García-Sogo
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, 46011 Valencia, Spain
| | - Juan de Dios Alché
- Departamento de Bioquímica, Biología Celular y Molecular de Plantas, Estación Experimental del Zaidín-CSIC, 18008 Granada, Spain
| | - Ana Ortiz-Atienza
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | - Sandra Bretones
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | - Fernando Juan Yuste-Lisbona
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | - Vicente Moreno
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, 46011 Valencia, Spain
| | - Juan Capel
- Centro de Investigación en Biotecnología Agroalimentaria (CIAIMBITAL), Universidad de Almería, 04120 Almería, Spain
| | | |
Collapse
|
8
|
Wu C, Yang Y, Su D, Yu C, Xian Z, Pan Z, Guan H, Hu G, Chen D, Li Z, Chen R, Hao Y. The SlHB8 acts as a negative regulator in tapetum development and pollen wall formation in Tomato. HORTICULTURE RESEARCH 2022; 9:uhac185. [PMID: 36338846 PMCID: PMC9627519 DOI: 10.1093/hr/uhac185] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 08/13/2022] [Indexed: 05/30/2023]
Abstract
Pollen development is crucial for the fruit setting process of tomatoes, but the underlying regulatory mechanism remains to be elucidated. Here, we report the isolation of one HD-Zip III family transcription factor, SlHB8, whose expression levels decreased as pollen development progressed. SlHB8 knockout using CRISPR/Cas9 increased pollen activity, subsequently inducing fruit setting, whereas overexpression displayed opposite phenotypes. Overexpression lines under control of the 35 s and p2A11 promoters revealed that SlHB8 reduced pollen activity by affecting early pollen development. Transmission electron microscopy and TUNEL analyses showed that SlHB8 accelerated tapetum degradation, leading to collapsed and infertile pollen without an intine and an abnormal exine. RNA-seq analysis of tomato anthers at the tetrad stage showed that SlHB8 positively regulates SPL/NZZ expression and the tapetum programmed cell death conserved genetic pathway DYT1-TDF1-AMS-MYB80 as well as other genes related to tapetum and pollen wall development. In addition, DNA affinity purification sequencing, electrophoretic mobility shift assay, yeast one-hybrid assay and dual-luciferase assay revealed SlHB8 directly activated the expression of genes related to pollen wall development. The study findings demonstrate that SlHB8 is involved in tapetum development and degradation and plays an important role in anther development.
Collapse
Affiliation(s)
| | | | | | - Canye Yu
- Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Zhiqiang Xian
- Key Laboratory of Plant Hormones and Development Regulation of Chongqing, School of Life Sciences, Chongqing University, Chongqing, China
- Center of Plant Functional Genomics, Institute of Advanced Interdisciplinary Studies, Chongqing University, Chongqing 400044, China
| | - Zanlin Pan
- Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Hongling Guan
- Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | - Guojian Hu
- UMR990 INRA/INP-ENSAT, Université de Toulouse, Castanet-Tolosan, France
| | - Da Chen
- Key Laboratory of Horticultural Crop Biology and Germplasm Innovation in South China, Ministry of Agriculture, College of Horticulture, South China Agricultural University, Guangzhou 510642, China
| | | | | | | |
Collapse
|
9
|
He H, Denecker J, Van Der Kelen K, Willems P, Pottie R, Phua SY, Hannah MA, Vertommen D, Van Breusegem F, Mhamdi A. The Arabidopsis mediator complex subunit 8 regulates oxidative stress responses. THE PLANT CELL 2021; 33:2032-2057. [PMID: 33713138 PMCID: PMC8290281 DOI: 10.1093/plcell/koab079] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/10/2021] [Indexed: 05/13/2023]
Abstract
Signaling events triggered by hydrogen peroxide (H2O2) regulate plant growth and defense by orchestrating a genome-wide transcriptional reprogramming. However, the specific mechanisms that govern H2O2-dependent gene expression are still poorly understood. Here, we identify the Arabidopsis Mediator complex subunit MED8 as a regulator of H2O2 responses. The introduction of the med8 mutation in a constitutive oxidative stress genetic background (catalase-deficient, cat2) was associated with enhanced activation of the salicylic acid pathway and accelerated cell death. Interestingly, med8 seedlings were more tolerant to oxidative stress generated by the herbicide methyl viologen (MV) and exhibited transcriptional hyperactivation of defense signaling, in particular salicylic acid- and jasmonic acid-related pathways. The med8-triggered tolerance to MV was manipulated by the introduction of secondary mutations in salicylic acid and jasmonic acid pathways. In addition, analysis of the Mediator interactome revealed interactions with components involved in mRNA processing and microRNA biogenesis, hence expanding the role of Mediator beyond transcription. Notably, MED8 interacted with the transcriptional regulator NEGATIVE ON TATA-LESS, NOT2, to control the expression of H2O2-inducible genes and stress responses. Our work establishes MED8 as a component regulating oxidative stress responses and demonstrates that it acts as a negative regulator of H2O2-driven activation of defense gene expression.
Collapse
Affiliation(s)
- Huaming He
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Jordi Denecker
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Present address: Illumina Cambridge Ltd, Cambridge, CB21 6DF, UK; Present address: Sciensano, 1050 Brussels, Belgium
| | - Katrien Van Der Kelen
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Present address: Illumina Cambridge Ltd, Cambridge, CB21 6DF, UK; Present address: Sciensano, 1050 Brussels, Belgium
| | - Patrick Willems
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Robin Pottie
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Su Yin Phua
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Matthew A Hannah
- BASF Belgium Coordination Center, Innovation Center Gent, 9052 Gent, Belgium
| | - Didier Vertommen
- de Duve Institute, Université Catholique de Louvain, 1200 Brussels, Belgium
| | - Frank Van Breusegem
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
| | - Amna Mhamdi
- Department of Plant Biotechnology and Bioinformatics, Ghent University, 9052 Gent, Belgium
- Center for Plant Systems Biology, VIB, 9052 Gent, Belgium
- Author for correspondence: (A.M.)
| |
Collapse
|
10
|
Sánchez-López J, Atarés A, Jáquez-Gutiérrez M, Ortiz-Atienza A, Capel C, Pineda B, García-Sogo B, Yuste-Lisbona FJ, Lozano R, Moreno V. Approaching the genetic dissection of indirect adventitious organogenesis process in tomato explants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 302:110721. [PMID: 33288027 DOI: 10.1016/j.plantsci.2020.110721] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 08/11/2020] [Accepted: 10/12/2020] [Indexed: 06/12/2023]
Abstract
The screening of 862 T-DNA lines was carried out to approach the genetic dissection of indirect adventitious organogenesis in tomato. Several mutants defective in different phases of adventitious organogenesis, namely callus growth (tdc-1), bud differentiation (tdb-1, -2, -3) and shoot-bud development (tds-1) were identified and characterized. The alteration of the TDC-1 gene blocked callus proliferation depending on the composition of growth regulators in the culture medium. Calli from tds-1 explants differentiated buds but did not develop normal shoots. Histological analysis showed that their abnormal development is due to failure in the organization of normal adventitious shoot meristems. Interestingly, tdc-1 and tds-1 mutant plants were indistinguishable from WT ones, indicating that the respective altered genes play specific roles in cell proliferation from explant cut zones (TDC-1 gene) or in the organization of adventitious shoot meristems (TDS-1 gene). Unlike the previous, plants of the three mutants defective in the differentiation of adventitious shoot-buds (tdb-1, -2, -3) showed multiple changes in vegetative and reproductive traits. Cosegregation analyses revealed the existence of an association between the phenotype of the tdb-3 mutant and a T-DNA insert, which led to the discovery that the SlMAPKKK17 gene is involved in the shoot-bud differentiation process.
Collapse
Affiliation(s)
- Jorge Sánchez-López
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain
| | - Alejandro Atarés
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain
| | - Marybel Jáquez-Gutiérrez
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain
| | - Ana Ortiz-Atienza
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL). Universidad de Almería, 04120-Almería, Spain
| | - Carmen Capel
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL). Universidad de Almería, 04120-Almería, Spain
| | - Benito Pineda
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain
| | - Begoña García-Sogo
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain
| | - Fernando J Yuste-Lisbona
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL). Universidad de Almería, 04120-Almería, Spain
| | - Rafael Lozano
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL). Universidad de Almería, 04120-Almería, Spain
| | - Vicente Moreno
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universitat Politècnica de València, Ingeniero Fausto Elio s/n, 46011, Valencia, Spain.
| |
Collapse
|
11
|
Micol-Ponce R, García-Alcázar M, Capel C, Yuste-Lisbona FJ, Pineda B, Atarés A, García-Sogo B, Capel J, Moreno V, Lozano R. The Tomato SlVIPP1 Gene Is Required for Plant Survival Through the Proper Development of Chloroplast Thylakoid Membrane. FRONTIERS IN PLANT SCIENCE 2020; 11:1305. [PMID: 32983195 PMCID: PMC7479267 DOI: 10.3389/fpls.2020.01305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 08/11/2020] [Indexed: 06/11/2023]
Abstract
Since membranes play essential roles in all living beings, all cells have developed mechanisms for efficient and fast repair of membrane damage. In Escherichia coli, the Phage shock stress A (PspA) protein is involved in the maintenance of the integrity of its inner membrane in response to the damage produced by exposure to stress conditions. A role in thylakoid membrane maintenance and reorganization has been proposed for Vesicle Inducing Protein in Plastid 1 (VIPP1), the putative PspA ortholog in Arabidopsis thaliana. While some membranes of plant cells have been extensively studied, the biosynthesis and maintenance of chloroplast thylakoid membrane remains poorly known. Here, we report the cloning and functional characterization of the tomato (Solanum lycopersicum L.) ortholog of Escherichia coli PspA and Arabidopsis thaliana VIPP1, which we dubbed SlVIPP1. Our genetic and molecular characterization of slvipp1, an insertional mutant, allowed us to conclude that the tomato SlVIPP1 gene is needed for development, as Arabidopsis VIPP1, but not Escherichia coli PspA. Homozygous slvipp1 tomato plants are albino and exhibit early lethality and highly aberrant chloroplast development with almost complete absence of thylakoids. The phenotype of tomato RNAi lines and that of additional slvipp1 alleles generated by CRISPR/Cas9 gene editing technology confirmed that the morphological and histological aberrations shown by slvipp1 homozygotes are caused by VIPP1 lack of function. We also found that tomato SlVIPP1 overexpression does not cause any visible effect on plant morphology and viability. Our work with slvipp1 plants evidences that SlVIPP1 is an essential gene required for tomato survival, since its function is crucial for the proper formation and/or maintenance of thylakoid membranes.
Collapse
Affiliation(s)
- Rosa Micol-Ponce
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, Almería, Spain
| | - Manuel García-Alcázar
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, Almería, Spain
| | - Carmen Capel
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, Almería, Spain
| | | | - Benito Pineda
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Alejandro Atarés
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Begoña García-Sogo
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Juan Capel
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, Almería, Spain
| | - Vicente Moreno
- Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Valencia, Spain
| | - Rafael Lozano
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, Almería, Spain
| |
Collapse
|
12
|
Sun S, Wang X, Wang K, Cui X. Dissection of complex traits of tomato in the post-genome era. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2020; 133:1763-1776. [PMID: 31745578 DOI: 10.1007/s00122-019-03478-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 11/09/2019] [Indexed: 06/10/2023]
Abstract
We present the main advances of dissection of complex traits in tomato by omics, the genes identified to control complex traits and the application of CRISPR/Cas9 in tomato breeding. Complex traits are believed to be under the control of multiple genes, each with different effects and interaction with environmental factors. Advance development of sequencing and molecular technologies has enabled the recognition of the genomic structure of most organisms and the identification of a nearly limitless number of markers that have made it to accelerate the speed of QTL identification and gene cloning. Meanwhile, multiomics have been used to identify the genetic variations among different tomato species, determine the expression profiles of genes in different tissues and at distinct developmental stages, and detect metabolites in different pathways and processes. The combination of these data facilitates to reveal mechanism underlying complex traits. Moreover, mutants generated by mutagens and genome editing provide relatively rich genetic variation for deciphering the complex traits and exploiting them in tomato breeding. In this article, we present the main advances of complex trait dissection in tomato by omics since the release of the tomato genome sequence in 2012. We provide further insight into some tomato complex traits because of the causal genetic variations discovered so far and explore the utilization of CRISPR/Cas9 for the modification of tomato complex traits.
Collapse
Affiliation(s)
- Shuai Sun
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xiaotian Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Ketao Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
- Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xia Cui
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
- Sino-Dutch Joint Laboratory of Horticultural Genomics, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| |
Collapse
|
13
|
Li S, Yan H, Mei WM, Tse YC, Wang H. Boosting autophagy in sexual reproduction: a plant perspective. THE NEW PHYTOLOGIST 2020; 226:679-689. [PMID: 31917864 DOI: 10.1111/nph.16414] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 12/21/2019] [Indexed: 06/10/2023]
Abstract
The key process of sexual reproduction is the successful fusion of the sperm and egg cell. Distinct from dynamic and flagellated animal sperm cells, higher flowering plant sperm cells are immotile. Therefore, plants have evolved a novel reproductive system to achieve fertilization and generate progenies. Plant sexual reproduction consists of multiple steps, mainly including gametophyte development, pollen-pistil recognition, pollen germination, double fertilization and postfertilization. During reproduction, active production, consumption and recycling of cellular components and energy are critically required to achieve fertilization. However, the underlying machinery of cellular degradation and turnover remains largely unexplored. Autophagy, the major catabolic pathway in eukaryotic cells, participates in regulating multiple aspects of plant activities, including abiotic and biotic stress resistance, pathogen response, senescence, nutrient remobilization and plant development. Nevertheless, a key unanswered question is how autophagy regulates plant fertilization and reproduction. Here, we focus on comparing and contrasting autophagy in several key reproductive processes of plant and animal systems to feature important distinctions and highlight future research directions of autophagy in angiosperm reproduction. We further discuss the potential crosstalk between autophagy and programmed cell death, which are often considered as two disconnected events in plant sexual reproduction.
Collapse
Affiliation(s)
- Shanshan Li
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - He Yan
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
| | - Wei-Ming Mei
- Outpatient Department of Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yu Chung Tse
- Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment and Department of Biology, Southern University of Science and Technology, Shenzhen, 518005, China
| | - Hao Wang
- College of Life Sciences, South China Agricultural University, Guangzhou, 510642, China
- Integrative Microbiology Research Centre, South China Agricultural University, Guangzhou, 510642, China
| |
Collapse
|
14
|
Nath VS, Shrestha A, Awasthi P, Mishra AK, Kocábek T, Matoušek J, Sečnik A, Jakše J, Radišek S, Hallan V. Mapping the Gene Expression Spectrum of Mediator Subunits in Response to Viroid Infection in Plants. Int J Mol Sci 2020; 21:E2498. [PMID: 32260277 PMCID: PMC7177877 DOI: 10.3390/ijms21072498] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 12/25/2022] Open
Abstract
The mediator (MED) represents a large, conserved, multi-subunit protein complex that regulates gene expression through interactions with RNA polymerase II and enhancer-bound transcription factors. Expanding research accomplishments suggest the predominant role of plant MED subunits in the regulation of various physiological and developmental processes, including the biotic stress response against bacterial and fungal pathogens. However, the involvement of MED subunits in virus/viroid pathogenesis remains elusive. In this study, we investigated for the first time the gene expression modulation of selected MED subunits in response to five viroid species (Apple fruit crinkle viroid (AFCVd), Citrus bark cracking viroid (CBCVd), Hop latent viroid (HLVd), Hop stunt viroid (HSVd), and Potato spindle tuber viroid (PSTVd)) in two model plant species (Nicotiana tabacum and N. benthamiana) and a commercially important hop (Humulus lupulus) cultivar. Our results showed a differential expression pattern of MED subunits in response to a viroid infection. The individual plant MED subunits displayed a differential and tailored expression pattern in response to different viroid species, suggesting that the MED expression is viroid- and plant species-dependent. The explicit evidence obtained from our results warrants further investigation into the association of the MED subunit with symptom development. Together, we provide a comprehensive portrait of MED subunit expression in response to viroid infection and a plausible involvement of MED subunits in fine-tuning transcriptional reprogramming in response to viroid infection, suggesting them as a potential candidate for rewiring the defense response network in plants against pathogens.
Collapse
Affiliation(s)
- Vishnu Sukumari Nath
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Ankita Shrestha
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Praveen Awasthi
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Ajay Kumar Mishra
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Tomáš Kocábek
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Jaroslav Matoušek
- Department of Molecular Genetics, Biology Centre of the Czech Academy of Sciences, Institute of Plant Molecular Biology, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (V.S.N.); (A.S.); (P.A.); (T.K.); (J.M.)
| | - Andrej Sečnik
- Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.S.); (J.J.)
| | - Jernej Jakše
- Department of Agronomy, Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, SI-1000 Ljubljana, Slovenia; (A.S.); (J.J.)
| | - Sebastjan Radišek
- Plant Protection Department, Slovenian Institute of Hop Research and Brewing, Cesta Žalskega Tabora 2, SI-3310 Žalec, Slovenia;
| | - Vipin Hallan
- CSIR-Institute of Himalayan Bioresource Technology, Palampur 176061, India;
| |
Collapse
|
15
|
Malik N, Ranjan R, Parida SK, Agarwal P, Tyagi AK. Mediator subunit OsMED14_1 plays an important role in rice development. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2020; 101:1411-1429. [PMID: 31702850 DOI: 10.1111/tpj.14605] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Revised: 10/14/2019] [Accepted: 10/30/2019] [Indexed: 05/06/2023]
Abstract
Mediator, a multisubunit co-activator complex, regulates transcription in eukaryotes and is involved in diverse processes in Arabidopsis through its different subunits. Here, we have explored developmental aspects of one of the rice Mediator subunit gene OsMED14_1. We analyzed its expression pattern through RNA in situ hybridization and pOsMED14_1:GUS transgenics that showed its expression in roots, leaves, anthers and seeds prominently at younger stages, indicating possible involvement of this subunit in multiple aspects of rice development. To understand the developmental roles of OsMED14_1 in rice, we generated and studied RNAi-based knockdown rice plants that showed multiple effects including less height, narrower leaves and culms with reduced vasculature, lesser lateral root branching, defective microspore development, reduced panicle branching and seed set, and smaller seeds. Histological analyses showed that slender organs were caused by reduction in both cell number and cell size in OsMED14_1 knockdown plants. Flow cytometric analyses and expression analyses of cell cycle-related genes revealed that defective cell-cycle progression led to these defects. Expression analyses of auxin-related genes and indole-3-acetic acid (IAA) immunolocalization study indicated altered auxin level in these knockdown plants. Reduction of lateral root branching in knockdown plants was corrected by exogenous IAA supplement. OsMED14_1 physically interacts with transcription factors YABBY5, TAPETUM DEGENERATION RETARDATION (TDR) and MADS29, possibly regulating auxin homeostasis and ultimately leading to lateral organ/leaf, microspore and seed development.
Collapse
Affiliation(s)
- Naveen Malik
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Rajeev Ranjan
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India
| | - Swarup K Parida
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Pinky Agarwal
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Akhilesh K Tyagi
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, New Delhi, 110067, India
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Marg, New Delhi, 110021, India
| |
Collapse
|
16
|
Jaskolowski A, Iñigo S, Arellano SM, Arias LA, Fiol DF, Sede AR, Oldra MB, Lorenzi H, Muschietti JP, Pagnussat GC, Cerdán PD. The MED30 subunit of mediator complex is essential for early plant development and promotes flowering in Arabidopsis thaliana. Development 2019; 146:146/10/dev175224. [PMID: 31097434 DOI: 10.1242/dev.175224] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 04/15/2019] [Indexed: 02/05/2023]
Abstract
Mediator is a large multiprotein complex that is required for the transcription of most, if not all, genes transcribed by RNA Polymerase II. A core set of subunits is essential to assemble a functional Mediator in vitro and, therefore, the corresponding loss-of-function mutants are expected to be lethal. The MED30 subunit is essential in animal systems, but is absent in yeast. Here, we report that MED30 is also essential for both male gametophyte and embryo development in the model plant Arabidopsis thaliana Mutant med30 pollen grains were viable and some were able to germinate and target the ovules, although the embryos aborted shortly after fertilization, suggesting that MED30 is important for the paternal control of early embryo development. When gametophyte defects were bypassed by specific pollen complementation, loss of MED30 led to early embryo development arrest. Later in plant development, MED30 promotes flowering through multiple signaling pathways; its downregulation led to a phase change delay, downregulation of SQUAMOSA PROMOTER BINDING PROTEIN-LIKE 3 (SPL3), FLOWERING LOCUS T (FTI) and SUPPRESSOR OF OVEREXPRESSION OF CO 1 (SOC1), and upregulation of FLOWERING LOCUS C (FLC).
Collapse
Affiliation(s)
- Aime Jaskolowski
- Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, 1405-Buenos Aires, Argentina
| | - Sabrina Iñigo
- Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, 1405-Buenos Aires, Argentina
| | - Sofía M Arellano
- Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, 1405-Buenos Aires, Argentina
| | - Leonardo A Arias
- Instituto de Investigaciones Biológicas, IIB-CONICET- Universidad Nacional de Mar del Plata, Funes 3250 cuarto nivel, 7600, Mar del Plata, Argentina
| | - Diego F Fiol
- Instituto de Investigaciones Biológicas, IIB-CONICET- Universidad Nacional de Mar del Plata, Funes 3250 cuarto nivel, 7600, Mar del Plata, Argentina
| | - Ana R Sede
- Instituto de Ingeniería Genética y Biología Molecular 'Dr. Hector N. Torres', INGEBI-CONICET, Buenos Aires 1428, Argentina
| | - María B Oldra
- Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, 1405-Buenos Aires, Argentina
| | | | - Jorge P Muschietti
- Instituto de Ingeniería Genética y Biología Molecular 'Dr. Hector N. Torres', INGEBI-CONICET, Buenos Aires 1428, Argentina.,Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina
| | - Gabriela C Pagnussat
- Instituto de Investigaciones Biológicas, IIB-CONICET- Universidad Nacional de Mar del Plata, Funes 3250 cuarto nivel, 7600, Mar del Plata, Argentina
| | - Pablo D Cerdán
- Fundación Instituto Leloir, IIBBA-CONICET, Avenida Patricias Argentinas 435, 1405-Buenos Aires, Argentina .,Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires 1428, Argentina
| |
Collapse
|
17
|
Jáquez-Gutiérrez M, Atarés A, Pineda B, Angarita P, Ribelles C, García-Sogo B, Sánchez-López J, Capel C, Yuste-Lisbona FJ, Lozano R, Moreno V. Phenotypic and genetic characterization of tomato mutants provides new insights into leaf development and its relationship to agronomic traits. BMC PLANT BIOLOGY 2019; 19:141. [PMID: 30987599 PMCID: PMC6466659 DOI: 10.1186/s12870-019-1735-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 03/20/2019] [Indexed: 05/24/2023]
Abstract
BACKGROUND Tomato mutants altered in leaf morphology are usually identified in the greenhouse, which demands considerable time and space and can only be performed in adequate periods. For a faster but equally reliable scrutiny method we addressed the screening in vitro of 971 T-DNA lines. Leaf development was evaluated in vitro in seedlings and shoot-derived axenic plants. New mutants were characterized in the greenhouse to establish the relationship between in vitro and in vivo leaf morphology, and to shed light on possible links between leaf development and agronomic traits, a promising field in which much remains to be discovered. RESULTS Following the screening in vitro of tomato T-DNA lines, putative mutants altered in leaf morphology were evaluated in the greenhouse. The comparison of results in both conditions indicated a general phenotypic correspondence, showing that in vitro culture is a reliable system for finding mutants altered in leaf development. Apart from providing homogeneous conditions, the main advantage of screening in vitro lies in the enormous time and space saving. Studies on the association between phenotype and nptII gene expression showed co-segregation in two lines (P > 99%). The use of an enhancer trap also allowed identifying gain-of-function mutants through reporter expression analysis. These studies suggested that genes altered in three other mutants were T-DNA tagged. New mutants putatively altered in brassinosteroid synthesis or perception, mutations determining multiple pleiotropic effects, lines affected in organ curvature, and the first tomato mutant with helical growth were discovered. Results also revealed new possible links between leaf development and agronomic traits, such as axillary branching, flower abscission, fruit development and fruit cracking. Furthermore, we found that the gene tagged in mutant 2635-MM encodes a Sterol 3-beta-glucosyltransferase. Expression analysis suggested that abnormal leaf development might be due to the lack-off-function of this gene. CONCLUSION In vitro culture is a quick, efficient and reliable tool for identifying tomato mutants altered in leaf morphology. The characterization of new mutants in vivo revealed new links between leaf development and some agronomic traits. Moreover, the possible implication of a gene encoding a Sterol 3-beta-glucosyltransferase in tomato leaf development is reported.
Collapse
Affiliation(s)
- Marybel Jáquez-Gutiérrez
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Alejandro Atarés
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Benito Pineda
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Pilar Angarita
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
- Facultad Ciencias de la Salud, Universidad Cooperativa de Colombia, Carrera 35#36-99, Barrio Barzal, Villavicencio, Colombia
| | - Carlos Ribelles
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Begoña García-Sogo
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| | - Jorge Sánchez-López
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
- Facultad de Agronomía, Universidad Autónoma de Sinaloa, Km 17.5 Carretera Culiacán-El Dorado, C.P 80000 Culiacán, Sinaloa Mexico
| | - Carmen Capel
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, 04120 Almería, Spain
| | - Fernando J. Yuste-Lisbona
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, 04120 Almería, Spain
| | - Rafael Lozano
- Centro de Investigación en Biotecnología Agroalimentaria (BITAL), Universidad de Almería, 04120 Almería, Spain
| | - Vicente Moreno
- Instituto de Biología Molecular y Celular de Plantas (IBMCP), Universitat Politècnica de València – Consejo Superior de Investigaciones Científicas, Ingeniero Fausto Elio s/n, 46022 Valencia, Spain
| |
Collapse
|
18
|
Liu X, Yang M, Liu X, Wei K, Cao X, Wang X, Wang X, Guo Y, Du Y, Li J, Liu L, Shu J, Qin Y, Huang Z. A putative bHLH transcription factor is a candidate gene for male sterile 32, a locus affecting pollen and tapetum development in tomato. HORTICULTURE RESEARCH 2019; 6:88. [PMID: 31666957 PMCID: PMC6804878 DOI: 10.1038/s41438-019-0170-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/23/2019] [Accepted: 05/15/2019] [Indexed: 05/19/2023]
Abstract
The tomato (Solanum lycopersicum) male sterile 32 (ms32) mutant has been used in hybrid seed breeding programs largely because it produces no pollen and has exserted stigmas. In this study, histological examination of anthers revealed dysfunctional pollen and tapetum development in the ms32 mutant. The ms32 locus was fine mapped to a 28.5 kb interval that encoded four putative genes. Solyc01g081100, a homolog of Arabidopsis bHLH10/89/90 and rice EAT1, was proposed to be the candidate gene of MS32 because it contained a single nucleotide polymorphism (SNP) that led to the formation of a premature stop codon. A codominant derived cleaved amplified polymorphic sequence (dCAPS) marker, MS32D, was developed based on the SNP. Real-time quantitative reverse-transcription PCR showed that most of the genes, which were proposed to be involved in pollen and tapetum development in tomato, were downregulated in the ms32 mutant. These findings may aid in marker-assisted selection of ms32 in hybrid breeding programs and facilitate studies on the regulatory mechanisms of pollen and tapetum development in tomato.
Collapse
Affiliation(s)
- Xiaoyan Liu
- College of Forestry and Horticulture, Xinjiang Agricultural University, 830052 Urumqi, China
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Mengxia Yang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Xiaolin Liu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Kai Wei
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Xue Cao
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Xiaotian Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Xiaoxuan Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Yanmei Guo
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Yongchen Du
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Junming Li
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Lei Liu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Jinshuai Shu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| | - Yong Qin
- College of Forestry and Horticulture, Xinjiang Agricultural University, 830052 Urumqi, China
| | - Zejun Huang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops of the Ministry of Agriculture, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, 100086 Beijing, China
| |
Collapse
|