1
|
Levins J, Dierschke T, Bowman JL. A subclass II bHLH transcription factor in Marchantia polymorpha gives insight into the ancestral land plant trait of spore formation. Curr Biol 2024; 34:895-901.e5. [PMID: 38280380 DOI: 10.1016/j.cub.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 11/21/2023] [Accepted: 01/03/2024] [Indexed: 01/29/2024]
Abstract
Sporopollenin is often said to be one of the toughest biopolymers known to man. The shift in dormancy cell wall deposition from around the diploid zygotes of charophycean algae to sporopollenin around the haploid spores of land plants essentially imparted onto land plants the gift of passive motility, a key acquisition that contributed to their vast and successful colonization across terrestrial habitats.1,2 A putative transcription factor controlling the land plant mode of sporopollenin deposition is the subclass II bHLHs, which are conserved and novel to land plants, with mutants of genes in angiosperms and mosses divulging roles relating to tapetum degeneration and spore development.3,4,5,6,7 We demonstrate that a subclass II bHLH gene, MpbHLH37, regulates sporopollenin biosynthesis and deposition in the model liverwort Marchantia polymorpha. Mpbhlh37 sporophytes show a striking loss of secondary wall deposits of the capsule wall, the elaters, and the spore exine, all while maintaining spore viability, identifying MpbHLH37 as a master regulator of secondary wall deposits of the sporophyte. Localization of MpbHLH37 to the capsule wall and elaters of the sporophyte directly designates these tissue types as a bona fide tapetum in liverworts, giving support to the notion that the presence of a tapetum is an ancestral land plant trait. Finally, as early land plant spore walls exhibit evidence of tapetal deposition,8,9,10,11,12 a tapetal capsule wall could have provided these plants with a developmental mechanism for sporopollenin deposition.
Collapse
Affiliation(s)
- Jonathan Levins
- School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, VIC 3800, Australia
| | - Tom Dierschke
- School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, VIC 3800, Australia
| | - John L Bowman
- School of Biological Sciences, Monash University, Clayton, VIC 3800, Australia; ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, VIC 3800, Australia.
| |
Collapse
|
2
|
Zhao J, Zhang C, Li S, Yuan M, Mu W, Yang J, Ma Y, Guan C, Ma C. Changes in m 6A RNA methylation are associated with male sterility in wolfberry. BMC PLANT BIOLOGY 2023; 23:456. [PMID: 37770861 PMCID: PMC10540408 DOI: 10.1186/s12870-023-04458-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 09/12/2023] [Indexed: 09/30/2023]
Abstract
BACKGROUND N6-methyladenosine (m6A) modification is the most abundant type of RNA modification in eukaryotic cells, playing pivotal roles in multiple plant growth and development processes. Yet the potential role of m6A in conferring the trait of male sterility in plants remains unknown. RESULTS In this study, we performed RNA-sequencing (RNA-Seq) and m6A-sequencing (m6A-Seq) of RNAs obtained from the anther tissue of two wolfberry lines: 'Ningqi No.1' (LB1) and its natural male sterile mutant 'Ningqi No.5' (LB5). Based on the newly assembled transcriptome, we established transcriptome-wide m6A maps for LB1 and LB5 at the single nucleus pollen stage. We found that the gene XLOC_021201, a homolog of m6A eraser-related gene ALKBH10 in Arabidopsis thaliana, was significantly differentially expressed between LB1 and LB5. We also identified 1642 and 563 m6A-modified genes with hypermethylated and hypomethylated patterns, respectively, in LB1 compared with LB5. We found the hypermethylated genes significantly enriched in biological processes related to energy metabolism and lipid metabolism, while hypomethylation genes were mainly linked to cell cycle process, gametophyte development, and reproductive process. Among these 2205 differentially m6A methylated genes, 13.74% (303 of 2205) were differentially expressed in LB1 vis-à-vis LB5. CONCLUSIONS This study constructs the first m6A transcriptome map of wolfberry and establishes an association between m6A and the trait of male sterility in wolfberry.
Collapse
Affiliation(s)
- Jiawen Zhao
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Chujun Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Sifan Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Mengmeng Yuan
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Wenlan Mu
- College of Life Science, Ningxia University, Yinchuan, Ningxia, 750021, China
| | - Jing Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yutong Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Cuiping Guan
- College of Life Science, Ningxia University, Yinchuan, Ningxia, 750021, China.
| | - Chuang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, Center of Bioinformatics, College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| |
Collapse
|
3
|
Hou Q, An X, Ma B, Wu S, Wei X, Yan T, Zhou Y, Zhu T, Xie K, Zhang D, Li Z, Zhao L, Niu C, Long Y, Liu C, Zhao W, Ni F, Li J, Fu D, Yang ZN, Wan X. ZmMS1/ZmLBD30-orchestrated transcriptional regulatory networks precisely control pollen exine development. MOLECULAR PLANT 2023; 16:1321-1338. [PMID: 37501369 DOI: 10.1016/j.molp.2023.07.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/09/2023] [Accepted: 07/25/2023] [Indexed: 07/29/2023]
Abstract
Because of its significance for plant male fertility and, hence, direct impact on crop yield, pollen exine development has inspired decades of scientific inquiry. However, the molecular mechanism underlying exine formation and thickness remains elusive. In this study, we identified that a previously unrecognized repressor, ZmMS1/ZmLBD30, controls proper pollen exine development in maize. Using an ms1 mutant with aberrantly thickened exine, we cloned a male-sterility gene, ZmMs1, which encodes a tapetum-specific lateral organ boundary domain transcription factor, ZmLBD30. We showed that ZmMs1/ZmLBD30 is initially turned on by a transcriptional activation cascade of ZmbHLH51-ZmMYB84-ZmMS7, and then it serves as a repressor to shut down this cascade via feedback repression to ensure timely tapetal degeneration and proper level of exine. This activation-feedback repression loop regulating male fertility is conserved in maize and sorghum, and similar regulatory mechanism may also exist in other flowering plants such as rice and Arabidopsis. Collectively, these findings reveal a novel regulatory mechanism of pollen exine development by which a long-sought master repressor of upstream activators prevents excessive exine formation.
Collapse
Affiliation(s)
- Quancan Hou
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Xueli An
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Biao Ma
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China
| | - Suowei Wu
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Xun Wei
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Tingwei Yan
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China
| | - Yan Zhou
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Taotao Zhu
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China
| | - Ke Xie
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Danfeng Zhang
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Ziwen Li
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Lina Zhao
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Canfang Niu
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Yan Long
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Chang Liu
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China
| | - Wei Zhao
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China
| | - Fei Ni
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Jinping Li
- Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China
| | - Daolin Fu
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Zhong-Nan Yang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Xiangyuan Wan
- Research Institute of Biology and Agriculture, University of Science and Technology Beijing, Beijing 100083, China; Beijing Engineering Laboratory of Main Crop Bio-Tech Breeding, Zhongzhi International Institute of Agricultural Biosciences, Beijing 100192, China.
| |
Collapse
|
4
|
Farinati S, Draga S, Betto A, Palumbo F, Vannozzi A, Lucchin M, Barcaccia G. Current insights and advances into plant male sterility: new precision breeding technology based on genome editing applications. FRONTIERS IN PLANT SCIENCE 2023; 14:1223861. [PMID: 37521915 PMCID: PMC10382145 DOI: 10.3389/fpls.2023.1223861] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 06/20/2023] [Indexed: 08/01/2023]
Abstract
Plant male sterility (MS) represents the inability of the plant to generate functional anthers, pollen, or male gametes. Developing MS lines represents one of the most important challenges in plant breeding programs, since the establishment of MS lines is a major goal in F1 hybrid production. For these reasons, MS lines have been developed in several species of economic interest, particularly in horticultural crops and ornamental plants. Over the years, MS has been accomplished through many different techniques ranging from approaches based on cross-mediated conventional breeding methods, to advanced devices based on knowledge of genetics and genomics to the most advanced molecular technologies based on genome editing (GE). GE methods, in particular gene knockout mediated by CRISPR/Cas-related tools, have resulted in flexible and successful strategic ideas used to alter the function of key genes, regulating numerous biological processes including MS. These precision breeding technologies are less time-consuming and can accelerate the creation of new genetic variability with the accumulation of favorable alleles, able to dramatically change the biological process and resulting in a potential efficiency of cultivar development bypassing sexual crosses. The main goal of this manuscript is to provide a general overview of insights and advances into plant male sterility, focusing the attention on the recent new breeding GE-based applications capable of inducing MS by targeting specific nuclear genic loci. A summary of the mechanisms underlying the recent CRISPR technology and relative success applications are described for the main crop and ornamental species. The future challenges and new potential applications of CRISPR/Cas systems in MS mutant production and other potential opportunities will be discussed, as generating CRISPR-edited DNA-free by transient transformation system and transgenerational gene editing for introducing desirable alleles and for precision breeding strategies.
Collapse
|
5
|
Bowman JL. The origin of a land flora. NATURE PLANTS 2022; 8:1352-1369. [PMID: 36550365 DOI: 10.1038/s41477-022-01283-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 10/19/2022] [Indexed: 05/12/2023]
Abstract
The origin of a land flora fundamentally shifted the course of evolution of life on earth, facilitating terrestrialization of other eukaryotic lineages and altering the planet's geology, from changing atmospheric and hydrological cycles to transforming continental erosion processes. Despite algal lineages inhabiting the terrestrial environment for a considerable preceding period, they failed to evolve complex multicellularity necessary to conquer the land. About 470 million years ago, one lineage of charophycean alga evolved complex multicellularity via developmental innovations in both haploid and diploid generations and became land plants (embryophytes), which rapidly diversified to dominate most terrestrial habitats. Genome sequences have provided unprecedented insights into the genetic and genomic bases for embryophyte origins, with some embryophyte-specific genes being associated with the evolution of key developmental or physiological attributes, such as meristems, rhizoids and the ability to form mycorrhizal associations. However, based on the fossil record, the evolution of the defining feature of embryophytes, the embryo, and consequently the sporangium that provided a reproductive advantage, may have been most critical in their rise to dominance. The long timeframe and singularity of a land flora were perhaps due to the stepwise assembly of a large constellation of genetic innovations required to conquer the terrestrial environment.
Collapse
Affiliation(s)
- John L Bowman
- School of Biological Sciences, Monash University, Melbourne, Victoria, Australia.
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Melbourne, Victoria, Australia.
| |
Collapse
|
6
|
Liu W, Yi Y, Zhuang J, Ge C, Cao Y, Zhang L, Liu M. Genome-wide identification and transcriptional profiling of the basic helix-loop-helix gene family in tung tree ( Vernicia fordii). PeerJ 2022; 10:e13981. [PMID: 36193421 PMCID: PMC9526410 DOI: 10.7717/peerj.13981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 08/10/2022] [Indexed: 01/19/2023] Open
Abstract
The basic helix-loop-helix (bHLH) transcription factor gene family is one of the largest gene families and is extensively involved in plant growth, development, biotic and abiotic stress responses. Tung tree (Vernicia fordii) is an economically important woody oil plant that produces tung oil rich in eleostearic acid. However, the characteristics of the bHLH gene family in the tung tree genome are still unclear. Hence, VfbHLHs were first searched at a genome-wide level, and their expression levels in various tissues or under low temperature were investigated systematically. In this study, we identified 104 VfbHLHs in the tung tree genome, and these genes were classified into 18 subfamilies according to bHLH domains. Ninety-eight VfbHLHs were mapped to but not evenly distributed on 11 pseudochromosomes. The domain sequences among VfbHLHs were highly conserved, and their conserved residues were also identified. To explore their expression, we performed gene expression profiling using RNA-Seq and RT-qPCR. We identified five, 18 and 28 VfbHLH genes in female flowers, male flowers and seeds, respectively. Furthermore, we found that eight genes (VfbHLH29, VfbHLH31, VfbHLH47, VfbHLH51, VfbHLH57, VfbHLH59, VfbHLH70, VfbHLH72) were significant differential expressed in roots, leaves and petioles under low temperature stress. This study lays the foundation for future studies on bHLH gene cloning, transgenes, and biological mechanisms.
Collapse
Affiliation(s)
- Wenjuan Liu
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Yaqi Yi
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Jingyi Zhuang
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Chang Ge
- School of Urban Design, Wuhan University, Wuhan, Hubei, China
| | - Yunpeng Cao
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Lin Zhang
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Meilan Liu
- Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, Hunan, China,Key Lab of Non-wood Forest Products of State Forestry Administration, College of Forestry, Central South University of Forestry and Technology, Changsha, Hunan, China
| |
Collapse
|
7
|
Levins J, Dierschke T, Bowman JL. The nature of nurture: the conserved role of tapetal-like cells in sporogenesis between mosses and angiosperms. THE NEW PHYTOLOGIST 2022; 235:377-379. [PMID: 35445752 DOI: 10.1111/nph.18142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 04/04/2022] [Indexed: 06/14/2023]
Affiliation(s)
- Jonathan Levins
- School of Biological Sciences, Monash University, Clayton, Melbourne, Vic., 3800, Australia
| | - Tom Dierschke
- School of Biological Sciences, Monash University, Clayton, Melbourne, Vic., 3800, Australia
| | - John L Bowman
- School of Biological Sciences, Monash University, Clayton, Melbourne, Vic., 3800, Australia
- ARC Centre of Excellence for Plant Success in Nature and Agriculture, Monash University, Clayton, Melbourne, Vic., 3800, Australia
| |
Collapse
|
8
|
Lopez‐Obando M, Landberg K, Sundberg E, Thelander M. Dependence on clade II bHLH transcription factors for nursing of haploid products by tapetal-like cells is conserved between moss sporangia and angiosperm anthers. THE NEW PHYTOLOGIST 2022; 235:718-731. [PMID: 35037245 PMCID: PMC9306660 DOI: 10.1111/nph.17972] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/28/2021] [Indexed: 05/16/2023]
Abstract
Clade II basic helix-loop-helix transcription factors (bHLH TFs) are essential for pollen production and tapetal nursing functions in angiosperm anthers. As pollen has been suggested to be related to bryophyte spores by descent, we characterized two Physcomitrium (Physcomitrella) patens clade II bHLH TFs (PpbHLH092 and PpbHLH098), to test if regulation of sporogenous cells and the nursing cells surrounding them is conserved between angiosperm anthers and bryophyte sporangia. We made CRISPR-Cas9 reporter and loss-of-function lines to address the function of PpbHLH092/098. We sectioned and analyzed WT and mutant sporophytes for a comprehensive stage-by-stage comparison of sporangium development. Spore precursors in the P. patens sporangium are surrounded by nursing cells showing striking similarities to tapetal cells in angiosperms. Moss clade II bHLH TFs are essential for the differentiation of these tapetal-like cells and for the production of functional spores. Clade II bHLH TFs provide a conserved role in controlling the sporophytic somatic cells surrounding and nursing the sporogenous cells in both moss sporangia and angiosperm anthers. This supports the hypothesis that such nursing functions in mosses and angiosperms, lineages separated by c. 450 million years, are related by descent.
Collapse
Affiliation(s)
- Mauricio Lopez‐Obando
- Department of Plant BiologyThe Linnean Centre of Plant Biology in UppsalaSwedish University of Agricultural SciencesPO Box 7080UppsalaSE‐75007Sweden
- VEDAS Corporación de Investigación e Innovación (VEDASCII)Cl 8 B 65‐261 050024MedellínColombia
| | - Katarina Landberg
- Department of Plant BiologyThe Linnean Centre of Plant Biology in UppsalaSwedish University of Agricultural SciencesPO Box 7080UppsalaSE‐75007Sweden
| | - Eva Sundberg
- Department of Plant BiologyThe Linnean Centre of Plant Biology in UppsalaSwedish University of Agricultural SciencesPO Box 7080UppsalaSE‐75007Sweden
| | - Mattias Thelander
- Department of Plant BiologyThe Linnean Centre of Plant Biology in UppsalaSwedish University of Agricultural SciencesPO Box 7080UppsalaSE‐75007Sweden
| |
Collapse
|
9
|
Bai Q, Yang W, Qin G, Zhao B, He L, Zhang X, Zhao W, Zhou D, Liu Y, Liu Y, He H, Tadege M, Xiong Y, Liu C, Chen J. Multidimensional Gene Regulatory Landscape of Motor Organ Pulvinus in the Model Legume Medicago truncatula. Int J Mol Sci 2022; 23:ijms23084439. [PMID: 35457256 PMCID: PMC9031546 DOI: 10.3390/ijms23084439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 04/11/2022] [Accepted: 04/13/2022] [Indexed: 11/26/2022] Open
Abstract
Nyctinastic leaf movement of Fabaceae is driven by the tiny motor organ pulvinus located at the base of the leaf or leaflet. Despite the increased understanding of the essential role of ELONGATED PETIOLULE1 (ELP1)/PETIOLE LIKE PULVINUS (PLP) orthologs in determining pulvinus identity in legumes, key regulatory components and molecular mechanisms underlying this movement remain largely unclear. Here, we used WT pulvinus and the equivalent tissue in the elp1 mutant to carry out transcriptome and proteome experiments. The omics data indicated that there are multiple cell biological processes altered at the gene expression and protein abundance level during the pulvinus development. In addition, comparative analysis of different leaf tissues provided clues to illuminate the possible common primordium between pulvinus and petiole, as well as the function of ELP1. Furthermore, the auxin pathway, cell wall composition and chloroplast distribution were altered in elp1 mutants, verifying their important roles in pulvinus development. This study provides a comprehensive insight into the motor organ of the model legume Medicago truncatula and further supplies a rich dataset to facilitate the identification of novel players involved in nyctinastic movement.
Collapse
Affiliation(s)
- Quanzi Bai
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenjing Yang
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guochen Qin
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai 201602, China;
| | - Baolin Zhao
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
| | - Liangliang He
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
| | - Xuan Zhang
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Weiyue Zhao
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dian Zhou
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Ye Liu
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Yu Liu
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
| | - Hua He
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
| | - Million Tadege
- Department of Plant and Soil Sciences, Institute for Agricultural Biosciences, Oklahoma State University, 3210 Sam Noble Parkway, Ardmore, OK 73401, USA;
| | - Yan Xiong
- Basic Forestry and Proteomics Research Centre, Haixia Institute of Science and Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China;
| | - Changning Liu
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (C.L.); (J.C.); Tel.: +86-0871-6516-3626 (J.C.)
| | - Jianghua Chen
- CAS Key Laboratory of Topical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming 650223, China; (Q.B.); (W.Y.); (B.Z.); (L.H.); (X.Z.); (W.Z.); (D.Z.); (Y.L.); (Y.L.); (H.H.)
- University of Chinese Academy of Sciences, Beijing 100049, China
- Correspondence: (C.L.); (J.C.); Tel.: +86-0871-6516-3626 (J.C.)
| |
Collapse
|
10
|
Nan GL, Teng C, Fernandes J, O'Connor L, Meyers BC, Walbot V. A cascade of bHLH-regulated pathways programs maize anther development. THE PLANT CELL 2022; 34:1207-1225. [PMID: 35018475 PMCID: PMC8972316 DOI: 10.1093/plcell/koac007] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 12/20/2021] [Indexed: 05/15/2023]
Abstract
The spatiotemporal development of somatic tissues of the anther lobe is necessary for successful fertile pollen production. This process is mediated by many transcription factors acting through complex, multi-layered networks. Here, our analysis of functional knockout mutants of interacting basic helix-loop-helix genes Ms23, Ms32, basic helix-loop-helix 122 (bHLH122), and bHLH51 in maize (Zea mays) established that male fertility requires all four genes, expressed sequentially in the tapetum (TP). Not only do they regulate each other, but also they encode proteins that form heterodimers that act collaboratively to guide many cellular processes at specific developmental stages. MS23 is confirmed to be the master factor, as the ms23 mutant showed the earliest developmental defect, cytologically visible in the TP, with the most drastic alterations in premeiotic gene expression observed in ms23 anthers. Notably, the male-sterile ms23, ms32, and bhlh122-1 mutants lack 24-nt phased secondary small interfering RNAs (phasiRNAs) and the precursor transcripts from the corresponding 24-PHAS loci, while the bhlh51-1 mutant has wild-type levels of both precursors and small RNA products. Multiple lines of evidence suggest that 24-nt phasiRNA biogenesis primarily occurs downstream of MS23 and MS32, both of which directly activate Dcl5 and are required for most 24-PHAS transcription, with bHLH122 playing a distinct role in 24-PHAS transcription.
Collapse
Affiliation(s)
- Guo-Ling Nan
- Department of Biology, Stanford University, Stanford, California 94305, USA
| | - Chong Teng
- Donald Danforth Plant Science Center, St Louis, Missouri 63132, USA
| | - John Fernandes
- Department of Biology, Stanford University, Stanford, California 94305, USA
| | - Lily O'Connor
- Donald Danforth Plant Science Center, St Louis, Missouri 63132, USA
- Department of Biology, Washington University, St Louis, Missouri 63130, USA
| | - Blake C Meyers
- Donald Danforth Plant Science Center, St Louis, Missouri 63132, USA
- The Division of Plant Science and Technology, University of Missouri–Columbia, Columbia, Missouri 65211, USA
- Authors for correspondence: (V.W.) and (B.C.M.)
| | - Virginia Walbot
- Department of Biology, Stanford University, Stanford, California 94305, USA
- Authors for correspondence: (V.W.) and (B.C.M.)
| |
Collapse
|
11
|
Rapid Identification of Pollen- and Anther-Specific Genes in Response to High-Temperature Stress Based on Transcriptome Profiling Analysis in Cotton. Int J Mol Sci 2022; 23:ijms23063378. [PMID: 35328797 PMCID: PMC8954629 DOI: 10.3390/ijms23063378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 03/17/2022] [Accepted: 03/19/2022] [Indexed: 12/13/2022] Open
Abstract
Anther indehiscence and pollen sterility caused by high temperature (HT) stress have become a major problem that decreases the yield of cotton. Pollen- and anther-specific genes play a critical role in the process of male reproduction and the response to HT stress. In order to identify pollen-specific genes that respond to HT stress, a comparative transcriptome profiling analysis was performed in the pollen and anthers of Gossypium hirsutum HT-sensitive Line H05 against other tissue types under normal temperature (NT) conditions, and the analysis of a differentially expressed gene was conducted in the pollen of H05 under NT and HT conditions. In total, we identified 1111 pollen-specific genes (PSGs), 1066 anther-specific genes (ASGs), and 833 pollen differentially expressed genes (DEGs). Moreover, we found that the late stage of anther included more anther- and pollen-specific genes (APSGs). Stress-related cis-regulatory elements (CREs) and hormone-responsive CREs are enriched in the promoters of APSGs, suggesting that APSGs may respond to HT stress. However, 833 pollen DEGs had only 10 common genes with 1111 PSGs, indicating that PSGs are mainly involved in the processes of pollen development and do not respond to HT stress. Promoters of these 10 common genes are enriched for stress-related CREs and MeJA-responsive CREs, suggesting that these 10 common genes are involved in the process of pollen development while responding to HT stress. This study provides a pathway for rapidly identifying cotton pollen-specific genes that respond to HT stress.
Collapse
|
12
|
TMT-based comparative proteomic analysis of the male-sterile mutant ms01 sheds light on sporopollenin production and pollen development in wucai (Brassica campestris L.). J Proteomics 2022; 254:104475. [PMID: 35007766 DOI: 10.1016/j.jprot.2021.104475] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 11/21/2022]
Abstract
A spontaneous male-sterile mutant ms01 was discovered from the excellent high-generation inbred line 'hx12-6-3' in wucai. Compared with wild-type 'hx12-6-3', ms01 displayed complete male sterility with degenerated stamens and no pollen. In this study, cytological observation revealed that the tapetum of the anthers of ms01 had degraded in advance, and microspore development had stagnated in the mononuclear stage, ultimately resulting in completely aborted pollen. Genetic analysis indicated that the sterility of ms01 was controlled by a single recessive nuclear gene. In the differential proteomic analysis of 'hx12-6-3' and ms01 flower buds using a tandem mass tags-based approach, a comparison of two stages (stage a and stage e) revealed 1272 differentially abundant proteins (DAPs). The abnormal variation of the anther cuticle, pollen coat, and sporopollenin production were effected by lipid metabolism and phenylpropanoid biosynthesis in the mutant ms01. Further analysis elucidated that pollen development was associated with amino acid metabolism, protein synthesis and degradation, carbohydrate metabolism, flavonoid biosynthesis and glutathione metabolism. These results provide novel insights into the molecular mechanism of GMS (genic male sterility) in wucai. SIGNIFICANCE: ms01, as the first indentified spontaneous male-sterile mutant in wucai, plays a significant role in the initial study of GMS (genic male sterility). In our study, the key DAPs related to anther and pollen development were obtained by TMT-based comparative proteomic analysis. We found that the abnormal accumulation of H2O2 might induce premature degradation of the tapetum, causing anther metabolism disorder and pollen abortion. This process involved multiple DAPs and formed a complex regulatory network that generated a series of physiological metabolic alterations, ultimately leading to male sterility. Our results provide a theoretical foundation for further research on the complex anther and pollen development process.
Collapse
|
13
|
Zhang R, Chang J, Li J, Lan G, Xuan C, Li H, Ma J, Zhang Y, Yang J, Tian S, Yuan L, Zhang X, Wei C. Disruption of the bHLH transcription factor Abnormal Tapetum 1 causes male sterility in watermelon. HORTICULTURE RESEARCH 2021; 8:258. [PMID: 34848708 PMCID: PMC8632879 DOI: 10.1038/s41438-021-00695-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 05/03/2023]
Abstract
Although male sterility has been identified as a useful trait for hybrid vigor utilization and hybrid seed production, its underlying molecular mechanisms in Cucurbitaceae species are still largely unclear. Here, a spontaneous male-sterile watermelon mutant, Se18, was reported to have abnormal tapetum development, which resulted in completely aborted pollen grains. Map-based cloning demonstrated that the causal gene Citrullus lanatus Abnormal Tapetum 1 (ClATM1) encodes a basic helix-loop-helix (bHLH) transcription factor with a 10-bp deletion and produces a truncated protein without the bHLH interaction and functional (BIF) domain in Se18 plants. qRT-PCR and RNA in situ hybridization showed that ClATM1 is specifically expressed in the tapetum layer and in microsporocytes during stages 6-8a of anther development. The genetic function of ClATM1 in regulating anther development was verified by CRISPR/Cas9-mediated mutagenesis. Moreover, ClATM1 was significantly downregulated in the Se18 mutant, displaying a clear dose effect at the transcriptional level. Subsequent dual-luciferase reporter, β-glucuronidase (GUS) activity, and yeast one-hybrid assays indicated that ClATM1 could activate its own transcriptional expression through promoter binding. Collectively, ClATM1 is the first male sterility gene cloned from watermelon, and its self-regulatory activity provides new insights into the molecular mechanism underlying anther development in plants.
Collapse
Affiliation(s)
- Ruimin Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jingjing Chang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jiayue Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Guangpu Lan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Changqing Xuan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Hao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jianxiang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yong Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jianqiang Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Shujuan Tian
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Li Yuan
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xian Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
- State Key Laboratory of Vegetable Germplasm Innovation, Tianjin Kernel Vegetable Research Institute, Tianjin, 300384, China.
| | - Chunhua Wei
- State Key Laboratory of Crop Stress Biology for Arid Areas, College of Horticulture, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| |
Collapse
|
14
|
Hamza R, Roque E, Gómez-Mena C, Madueño F, Beltrán JP, Cañas LA. PsEND1 Is a Key Player in Pea Pollen Development Through the Modulation of Redox Homeostasis. FRONTIERS IN PLANT SCIENCE 2021; 12:765277. [PMID: 34777450 PMCID: PMC8586548 DOI: 10.3389/fpls.2021.765277] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/11/2021] [Indexed: 06/13/2023]
Abstract
Redox homeostasis has been linked to proper anther and pollen development. Accordingly, plant cells have developed several Reactive Oxygen Species (ROS)-scavenging mechanisms to maintain the redox balance. Hemopexins constitute one of these mechanisms preventing heme-associated oxidative stress in animals, fungi, and plants. Pisum sativum ENDOTHECIUM 1 (PsEND1) is a pea anther-specific gene that encodes a protein containing four hemopexin domains. We report the functional characterization of PsEND1 and the identification in its promoter region of cis-regulatory elements that are essential for the specific expression in anthers. PsEND1 promoter deletion analysis revealed that a putative CArG-like regulatory motif is necessary to confer promoter activity in developing anthers. Our data suggest that PsEND1 might be a hemopexin regulated by a MADS-box protein. PsEND1 gene silencing in pea, and its overexpression in heterologous systems, result in similar defects in the anthers consisting of precocious tapetum degradation and the impairment of pollen development. Such alterations were associated to the production of superoxide anion and altered activity of ROS-scavenging enzymes. Our findings demonstrate that PsEND1 is essential for pollen development by modulating ROS levels during the differentiation of the anther tissues surrounding the microsporocytes.
Collapse
|
15
|
A Rapid Pipeline for Pollen- and Anther-Specific Gene Discovery Based on Transcriptome Profiling Analysis of Maize Tissues. Int J Mol Sci 2021; 22:ijms22136877. [PMID: 34206810 PMCID: PMC8267723 DOI: 10.3390/ijms22136877] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 06/11/2021] [Accepted: 06/16/2021] [Indexed: 11/16/2022] Open
Abstract
Recently, crop breeders have widely adopted a new biotechnology-based process, termed Seed Production Technology (SPT), to produce hybrid varieties. The SPT does not produce nuclear male-sterile lines, and instead utilizes transgenic SPT maintainer lines to pollinate male-sterile plants for propagation of nuclear-recessive male-sterile lines. A late-stage pollen-specific promoter is an essential component of the pollen-inactivating cassette used by the SPT maintainers. While a number of plant pollen-specific promoters have been reported so far, their usefulness in SPT has remained limited. To increase the repertoire of pollen-specific promoters for the maize community, we conducted a comprehensive comparative analysis of transcriptome profiles of mature pollen and mature anthers against other tissue types. We found that maize pollen has much less expressed genes (>1 FPKM) than other tissue types, but the pollen grain has a large set of distinct genes, called pollen-specific genes, which are exclusively or much higher (100 folds) expressed in pollen than other tissue types. Utilizing transcript abundance and correlation coefficient analysis, 1215 mature pollen-specific (MPS) genes and 1009 mature anther-specific (MAS) genes were identified in B73 transcriptome. These two gene sets had similar GO term and KEGG pathway enrichment patterns, indicating that their members share similar functions in the maize reproductive process. Of the genes, 623 were shared between the two sets, called mature anther- and pollen-specific (MAPS) genes, which represent the late-stage pollen-specific genes of the maize genome. Functional annotation analysis of MAPS showed that 447 MAPS genes (71.7% of MAPS) belonged to genes encoding pollen allergen protein. Their 2-kb promoters were analyzed for cis-element enrichment and six well-known pollen-specific cis-elements (AGAAA, TCCACCA, TGTGGTT, [TA]AAAG, AAATGA, and TTTCT) were found highly enriched in the promoters of MAPS. Interestingly, JA-responsive cis-element GCC box (GCCGCC) and ABA-responsive cis-element-coupling element1 (ABRE-CE1, CCACC) were also found enriched in the MAPS promoters, indicating that JA and ABA signaling likely regulate pollen-specific MAPS expression. This study describes a robust and straightforward pipeline to discover pollen-specific promotes from publicly available data while providing maize breeders and the maize industry a number of late-stage (mature) pollen-specific promoters for use in SPT for hybrid breeding and seed production.
Collapse
|
16
|
Wei C, Zhang R, Yue Z, Yan X, Cheng D, Li J, Li H, Zhang Y, Ma J, Yang J, Zhang X. The impaired biosynthetic networks in defective tapetum lead to male sterility in watermelon. J Proteomics 2021; 243:104241. [PMID: 33905954 DOI: 10.1016/j.jprot.2021.104241] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/18/2021] [Accepted: 04/18/2021] [Indexed: 12/25/2022]
Abstract
Heterosis has been widely applied in watermelon breeding, because of the higher resistance and yield of hybrid. As the basis of heterosis utilization, genic male sterility (GMS) is an important tool for facilitating hybrid seed production, while the detailed mechanism in watermelon is still largely unknown. Here, we report a spontaneous mutant Se18 exhibited complete male sterility due to the uniquely multilayered tapetum and the un-meiotic pollen mother cells during pollen development. Using TMT based quantitative proteomic analyses, a total of 348 differentially abundant proteins (DAPs) were detected with the overwhelming majority down-regulated in mutant Se18. By analyzing the putative orthologs/homologs of Arabidopsis GMS related genes, the biosynthesis and transport of sporopollenin and tryphine precursors were predictably altered in mutant compared to its sibling wild type. Moreover, the general phenylpropanoid pathway as well as its related metabolisms was also expectably impaired in mutant, coincident with the pale yellow petals. Notably, some key transcriptional factors regulating tapetum development, together with their down-regulated targets, offered potentially valuable candidates regarding of male sterility. Collectively, the disrupted regulatory networks underlying male sterility of watermelon was proposed, which provide novel insights into genetic mechanism of male reproductive process and rich gene resources for future research. SIGNIFICANCE: Watermelon is an importantly economical cucurbit crop worldwide, with high nutritional value. Although several male sterile mutants have been identified in watermelon, the underlying molecular mechanism is poorly elucidated. Comparative cytological analysis revealed that the defective development of tapetum was responsible for male sterility in mutant Se18. Combined with the morphological comparison, male floral buds at 2.0-2.5 mm in diameter were confirmed with no obvious phenotypic differences but distinct cytological defects, which were in turn sampled for TMT based proteomic analyses. Referring to functionally characterized GMS related genes, the genetic pathway DYT1-TDF1-AMS-MS188-MS1 regulating tapetum development, together with some downstream targets, were considerably altered in mutant Se18. Moreover, enrichment analyses illustrated the general phenylpropanoid related metabolisms, as well as the biosynthesis and transport of sporopollenin and tryphine precursors, were significantly disrupted in defective anther development. Collectively, the proposed regulatory networks in watermelon not only contribute to a better understanding of molecular mechanisms underlying male sterility, but also provide valuable GMS related candidates for future researches.
Collapse
Affiliation(s)
- Chunhua Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China.
| | - Ruimin Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhen Yue
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xing Yan
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Denghu Cheng
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jiayue Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hao Li
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yong Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianxiang Ma
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Jianqiang Yang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xian Zhang
- State Key Laboratory of Crop Stress Biology in Arid Areas, College of Horticulture, Northwest A&F University, Yangling, Shaanxi 712100, China; State Key Laboratory of Vegetable Germplasm Innovation, Tianjin 300384, China.
| |
Collapse
|
17
|
Zhao W, Bai Q, Zhao B, Wu Q, Wang C, Liu Y, Yang T, Liu Y, He H, Du S, Tadege M, He L, Chen J. The geometry of the compound leaf plays a significant role in the leaf movement of Medicago truncatula modulated by mtdwarf4a. THE NEW PHYTOLOGIST 2021; 230:475-484. [PMID: 33458826 DOI: 10.1111/nph.17198] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 01/09/2021] [Indexed: 06/12/2023]
Abstract
In most legumes, two typical features found in leaves are diverse compound forms and the pulvinus-driven nyctinastic movement. Many genes have been identified for leaf-shape determination, but the underlying nature of leaf movement as well as its association with the compound form remains largely unknown. Using forward-genetic screening and whole-genome resequencing, we found that two allelic mutants of Medicago truncatula with unclosed leaflets at night were impaired in MtDWARF4A (MtDWF4A), a gene encoding a cytochrome P450 protein orthologous to Arabidopsis DWARF4. The mtdwf4a mutant also had a mild brassinosteroid (BR)-deficient phenotype bearing pulvini without significant deficiency in organ identity. Both mtdwf4a and dwf4 could be fully rescued by MtDWF4A, and mtdwf4a could close their leaflets at night after the application of exogenous 24-epi-BL. Surgical experiments and genetic analysis of double mutants revealed that the failure to exhibit leaf movement in mtdwf4a is a consequence of the physical obstruction of the overlapping leaflet laminae, suggesting a proper geometry of leaflets is important for their movement in M. truncatula. These observations provide a novel insight into the nyctinastic movement of compound leaves, shedding light on the importance of open space for organ movements in plants.
Collapse
Affiliation(s)
- Weiyue Zhao
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Quanzi Bai
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Baolin Zhao
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
| | - Qing Wu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chaoqun Wang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Ye Liu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230027, China
| | - Tianquan Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- Germplasm Bank of Wild Species, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, China
| | - Yu Liu
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
| | - Hua He
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
| | - Shanshan Du
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Million Tadege
- Department of Plant and Soil Sciences, Institute for Agricultural Biosciences, Oklahoma State University, 3210 Sam Noble Parkway, Ardmore, OK, 73401, USA
| | - Liangliang He
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
| | - Jianghua Chen
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, CAS Center for Excellence in Molecular Plant Sciences, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, 88 Xuefu Road, Kunming, Yunnan, 650223, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, 230027, China
| |
Collapse
|