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Han H, Wu W, Hou H, Zhang M, Guo A, Zhou Y, Liu J, Li K, Bai S, Li B, Li Z, Guo S, Wang P. Function analysis of transcription factor OSR1 regulating osmotic stress resistance in maize. Biochem Biophys Res Commun 2024; 714:149956. [PMID: 38663095 DOI: 10.1016/j.bbrc.2024.149956] [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: 01/20/2024] [Revised: 04/05/2024] [Accepted: 04/15/2024] [Indexed: 05/07/2024]
Abstract
BACKGROUND Maize is a major cereal crop world widely, however, the yield of maize is frequently limited by dehydration and even death of plants, which resulted from osmotic stress such as drought and salinity. Dissection of molecular mechanisms controlling stress tolerance will enable plant scientists and breeders to increase crops yield by manipulating key regulatory components. METHODS The candidate OSR1 gene was identified by map-based cloning. The expression level of OSR1 was verified by qRT-PCR and digital PCR in WT and osr1 mutant. Electrophoretic mobility shift assay, transactivation activity assay, subcellular localization, transcriptome analysis and physiological characters measurements were conducted to analyze the function of OSR1 in osmotic stress resistance in maize. RESULTS The osr1 mutant was significantly less sensitive to osmotic stress than the WT plants and displayed stronger water-holding capacity, and the OSR1 homologous mutant in Arabidopsis showed a phenotype similar with maize osr1 mutant. Differentially expressed genes (DEGs) were identified between WT and osr1 under osmotic stress by transcriptome analysis, the expression levels of many genes, such as LEA, auxin-related factors, PPR family members, and TPR family members, changed notably, which may primarily involve in osmotic stress or promote root development. CONCLUSIONS OSR1 may serve as a negative regulatory factor in response to osmotic stress in maize. The present study sheds new light on the molecular mechanisms of osmotic stress in maize.
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Affiliation(s)
- Hongpeng Han
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China; School of Physical Education and Health Management, Henan Finance University, Zhengzhou, 450046, Henan, PR China
| | - Wenqiang Wu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Huijiao Hou
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Mingli Zhang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Aiyu Guo
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Yusen Zhou
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Jiong Liu
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Kaiwen Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Shenglong Bai
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Baozhu Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Zhi Li
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Siyi Guo
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China
| | - Pengtao Wang
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng, 475004, Henan, PR China.
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Yuan J, Liu X, Zhao H, Wang Y, Wei X, Wang P, Zhan J, Liu L, Li F, Ge X. GhRCD1 regulates cotton somatic embryogenesis by modulating the GhMYC3-GhMYB44-GhLBD18 transcriptional cascade. THE NEW PHYTOLOGIST 2023; 240:207-223. [PMID: 37434324 DOI: 10.1111/nph.19120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 06/08/2023] [Indexed: 07/13/2023]
Abstract
Plant somatic embryogenesis (SE) is a multifactorial developmental process where embryos that can develop into whole plants are produced from somatic cells rather than through the fusion of gametes. The molecular regulation of plant SE, which involves the fate transition of somatic cells into embryogenic cells, is intriguing yet remains elusive. We deciphered the molecular mechanisms by which GhRCD1 interacts with GhMYC3 to regulate cell fate transitions during SE in cotton. While silencing of GhMYC3 had no discernible effect on SE, its overexpression accelerated callus formation, and proliferation. We identified two of GhMYC3 downstream SE regulators, GhMYB44 and GhLBD18. GhMYB44 overexpression was unconducive to callus growth but bolstered EC differentiation. However, GhLBD18 can be triggered by GhMYC3 but inhibited by GhMYB44, which positively regulates callus growth. On top of the regulatory cascade, GhRCD1 antagonistically interacts with GhMYC3 to inhibit the transcriptional function of GhMYC3 on GhMYB44 and GhLBD18, whereby a CRISPR-mediated rcd1 mutation expedites cell fate transition, resembling the effects of GhMYC3 overexpression. Furthermore, we showed that reactive oxygen species (ROS) are involved in SE regulation. Our findings elucidated that SE homeostasis is maintained by the tetrapartite module, GhRCD1-GhMYC3-GhMYB44-GhLBD18, which acts to modulate intracellular ROS in a temporal manner.
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Affiliation(s)
- Jiachen Yuan
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xingxing Liu
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
| | - Hang Zhao
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
- College of Life Sciences, Qufu Normal University, Qufu, 273165, China
| | - Ye Wang
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xi Wei
- Research Base of State Key Laboratory of Cotton Biology, Henan Normal University, Xinxiang, 453000, China
| | - Peng Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Jingjing Zhan
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Lisen Liu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Fuguang Li
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
| | - Xiaoyang Ge
- Zhengzhou Research Base, State Key Laboratory of Cotton Biology, Zhengzhou University, Zhengzhou, 450001, China
- State Key Laboratory of Cotton Biology, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang, 455000, China
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Allsman LA, Bellinger MA, Huang V, Duong M, Contreras A, Romero AN, Verboonen B, Sidhu S, Zhang X, Steinkraus H, Uyehara AN, Martinez SE, Sinclair RM, Soriano GS, Diep B, Byrd V. D, Noriega A, Drakakaki G, Sylvester AW, Rasmussen CG. Subcellular positioning during cell division and cell plate formation in maize. FRONTIERS IN PLANT SCIENCE 2023; 14:1204889. [PMID: 37484472 PMCID: PMC10360171 DOI: 10.3389/fpls.2023.1204889] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 05/24/2023] [Indexed: 07/25/2023]
Abstract
Introduction During proliferative plant cell division, the new cell wall, called the cell plate, is first built in the middle of the cell and then expands outward to complete cytokinesis. This dynamic process requires coordinated movement and arrangement of the cytoskeleton and organelles. Methods Here we use live-cell markers to track the dynamic reorganization of microtubules, nuclei, endoplasmic reticulum, and endomembrane compartments during division and the formation of the cell plate in maize leaf epidermal cells. Results The microtubule plus-end localized protein END BINDING1 (EB1) highlighted increasing microtubule dynamicity during mitosis to support rapid changes in microtubule structures. The localization of the cell-plate specific syntaxin KNOLLE, several RAB-GTPases, as well as two plasma membrane localized proteins was assessed after treatment with the cytokinesis-specific callose-deposition inhibitor Endosidin7 (ES7) and the microtubule-disrupting herbicide chlorpropham (CIPC). While ES7 caused cell plate defects in Arabidopsis thaliana, it did not alter callose accumulation, or disrupt cell plate formation in maize. In contrast, CIPC treatment of maize epidermal cells occasionally produced irregular cell plates that split or fragmented, but did not otherwise disrupt the accumulation of cell-plate localized proteins. Discussion Together, these markers provide a robust suite of tools to examine subcellular trafficking and organellar organization during mitosis and cell plate formation in maize.
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Affiliation(s)
- Lindy A. Allsman
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Marschal A. Bellinger
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Vivian Huang
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Matthew Duong
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Alondra Contreras
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Andrea N. Romero
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Benjamin Verboonen
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Sukhmani Sidhu
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Xiaoguo Zhang
- Department of Molecular Biology, University of Wyoming, Laramie, WY, United States
| | - Holly Steinkraus
- Department of Molecular Biology, University of Wyoming, Laramie, WY, United States
| | - Aimee N. Uyehara
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Stephanie E. Martinez
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Rosalie M. Sinclair
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Gabriela Salazar Soriano
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Beatrice Diep
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Dawson Byrd V.
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Alexander Noriega
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
| | - Georgia Drakakaki
- Department of Plant Sciences, University of California, Davis, Davis, CA, United States
| | - Anne W. Sylvester
- Department of Molecular Biology, University of Wyoming, Laramie, WY, United States
| | - Carolyn G. Rasmussen
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, Riverside, CA, United States
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Liu X, Kong W, Xiao N, Huang L, Zhang Y, Chen W, Mo B, Yu Y. A simple and efficient carbon nanotube-based nanocarriers simultaneously delivers multiple plasmids into diverse mature tissues of monocotyledonous crops. SCIENCE CHINA. LIFE SCIENCES 2023:10.1007/s11427-022-2266-0. [PMID: 36738434 DOI: 10.1007/s11427-022-2266-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 12/19/2022] [Indexed: 02/05/2023]
Affiliation(s)
- Xuedong Liu
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.,Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China
| | - Wenwen Kong
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Nian Xiao
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Lijuan Huang
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Yu Zhang
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.,Instrumental Analysis Center of Shenzhen University (Lihu Campus), Shenzhen University, Shenzhen, 518060, China
| | - Weizhao Chen
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Beixin Mo
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Yu Yu
- Guangdong Provincial Key Laboratory for Plant Epigenetics, Longhua Bioindustry and Innovation Research Institute, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China.
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Mu H, Li Y, Yuan L, Jiang J, Wei Y, Duan W, Fan P, Li S, Liang Z, Wang L. MYB30 and MYB14 form a repressor-activator module with WRKY8 that controls stilbene biosynthesis in grapevine. THE PLANT CELL 2023; 35:552-573. [PMID: 36255259 PMCID: PMC9806661 DOI: 10.1093/plcell/koac308] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 10/13/2022] [Indexed: 05/12/2023]
Abstract
When exposed to pathogen infection or ultraviolet (UV) radiation, grapevine (Vitis vinifera) plants rapidly accumulate the stilbenoid resveratrol (Res) with concomitant increase of stilbene synthase (STS), the key enzyme in stilbene biosynthesis. Although a few transcription factors have been shown to regulate STSs, the molecular mechanism governing the regulation of STSs is not well elucidated. Our previous work showed that a VvMYB14-VvWRKY8 regulatory loop fine-tunes stilbene biosynthesis in grapevine through protein-protein interaction; overexpression of VvWRKY8 down-regulates VvMYB14 and VvSTS15/21; and application of exogenous Res up-regulates WRKY8 expression. Here, we identified an R2R3-MYB repressor, VvMYB30, which competes with the activator VvMYB14 for binding to the common binding sites in the VvSTS15/21 promoter. Similar to VvMYB14, VvMYB30 physically interacts with VvWRKY8 through their N-termini, forming a complex that does not bind DNA. Exposure to UV-B/C stress induces VvMYB14, VvWRKY8, and VvSTS15/21, but represses VvMYB30 in grapevine leaves. In addition, MYB30 expression is up-regulated by VvWRKY8-overexpression or exogenous Res. These findings suggest that the VvMYB14-VvWRKY8-VvMYB30 regulatory circuit allows grapevine to respond to UV stress by producing Res and prevents over-accumulation of Res to balance metabolic costs. Our work highlights the stress-mediated induction and feedback inhibition of stilbene biosynthesis through a complex regulatory network involving multiple positive and negative transcriptional regulators.
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Affiliation(s)
- Huayuan Mu
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- University of Chinese Academy of Sciences, Beijing 100049, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Yang Li
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Ling Yuan
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, Kentucky 40546, USA
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
| | - Jinzhu Jiang
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Yongzan Wei
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Wei Duan
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Peige Fan
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Shaohua Li
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Zhenchang Liang
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
| | - Lijun Wang
- Beijing Key Laboratory of Grape Sciences and Enology, CAS Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
- Chinese National Botany Garden, Beijing 100093, China
- LIA INNOGRAPE International Associated Laboratory, Beijing 100093, China
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Genome-Wide Identification of Auxin-Responsive GH3 Gene Family in Saccharum and the Expression of ScGH3-1 in Stress Response. Int J Mol Sci 2022; 23:ijms232112750. [PMID: 36361540 PMCID: PMC9654502 DOI: 10.3390/ijms232112750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/13/2022] [Accepted: 10/20/2022] [Indexed: 11/06/2022] Open
Abstract
Gretchen Hagen3 (GH3), one of the three major auxin-responsive gene families, is involved in hormone homeostasis in vivo by amino acid splicing with the free forms of salicylic acid (SA), jasmonic acid (JA) or indole-3-acetic acid (IAA). Until now, the functions of sugarcane GH3 (SsGH3) family genes in response to biotic stresses have been largely unknown. In this study, we performed a systematic identification of the SsGH3 gene family at the genome level and identified 41 members on 19 chromosomes in the wild sugarcane species, Saccharum spontaneum. Many of these genes were segmentally duplicated and polyploidization was the main contributor to the increased number of SsGH3 members. SsGH3 proteins can be divided into three major categories (SsGH3-I, SsGH3-II, and SsGH3-III) and most SsGH3 genes have relatively conserved exon-intron arrangements and motif compositions. Diverse cis-elements in the promoters of SsGH3 genes were predicted to be essential players in regulating SsGH3 expression patterns. Multiple transcriptome datasets demonstrated that many SsGH3 genes were responsive to biotic and abiotic stresses and possibly had important functions in the stress response. RNA sequencing and RT-qPCR analysis revealed that SsGH3 genes were differentially expressed in sugarcane tissues and under Sporisorium scitamineum stress. In addition, the SsGH3 homolog ScGH3-1 gene (GenBank accession number: OP429459) was cloned from the sugarcane cultivar (Saccharum hybrid) ROC22 and verified to encode a nuclear- and membrane-localization protein. ScGH3-1 was constitutively expressed in all tissues of sugarcane and the highest amount was observed in the stem pith. Interestingly, it was down-regulated after smut pathogen infection but up-regulated after MeJA and SA treatments. Furthermore, transiently overexpressed Nicotiana benthamiana, transduced with the ScGH3-1 gene, showed negative regulation in response to the infection of Ralstonia solanacearum and Fusarium solani var. coeruleum. Finally, a potential model for ScGH3-1-mediated regulation of resistance to pathogen infection in transgenic N. benthamiana plants was proposed. This study lays the foundation for a comprehensive understanding of the sequence characteristics, structural properties, evolutionary relationships, and expression of the GH3 gene family and thus provides a potential genetic resource for sugarcane disease-resistance breeding.
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Wang K, Xu L, Wang Y, Ying J, Li J, Dong J, Li C, Zhang X, Liu L. Genome-wide characterization of homeodomain-leucine zipper genes reveals RsHDZ17 enhances the heat tolerance in radish (Raphanus sativus L.). PHYSIOLOGIA PLANTARUM 2022; 174:e13789. [PMID: 36183327 DOI: 10.1111/ppl.13789] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 09/06/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
Homeodomain-leucine zipper (HD-Zip) transcription factors are involved in various biological processes of plant growth, development, and abiotic stress response. However, how they regulate heat stress (HS) response remains largely unclear in plants. In this study, a total of 83 RsHD-Zip genes were firstly identified from the genome of Raphanus sativus. RNA-Seq, RT-qPCR and promoter activity assays revealed that RsHDZ17 from HD-Zip Class I was highly expressed under heat, salt, and Cd stresses. RsHDZ17 is a nuclear protein with transcriptional activity at the C-terminus. Ectopic overexpression (OE) of RsHDZ17 in Arabidopsis thaliana enhanced the HS tolerance by improving the survival rate, photosynthesis capacity, and scavenging for reactive oxygen species (ROS). In addition, transient OE of RsHDZ17 in radish cotyledons impeded cell injury and augmented ROS scavenging under HS. Moreover, yeast one-hybrid, dual-luciferase assay, and electrophoretic mobility shift assay revealed that RsHDZ17 could bind to the promoter of HSFA1e. Collectively, these pieces of evidence demonstrate that RsHDZ17 could play a positive role in thermotolerance, partially through up-regulation of the expression of HSFA1e in plants. These results provide novel insights into the role of HD-Zips in radish and facilitate genetical engineering and development of heat-tolerant radish in breeding programs.
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Affiliation(s)
- Kai Wang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Liang Xu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Yan Wang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Jiali Ying
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Jingxue Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Junhui Dong
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Cui Li
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Xiaoli Zhang
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
| | - Liwang Liu
- National Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Horticultural Crop Biology and Genetic Improvement (East China) of MOAR, College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, People's Republic of China
- College of Horticulture and Landscape Architecture, Yangzhou University, Yangzhou, Jiangsu, People's Republic of China
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Kemppainen M, Pardo A. Nucleus-directed fluorescent reporter system for promoter studies in the ectomycorrhizal fungus Laccaria bicolor. J Microbiol Methods 2021; 190:106341. [PMID: 34610385 DOI: 10.1016/j.mimet.2021.106341] [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: 08/09/2021] [Revised: 09/30/2021] [Accepted: 09/30/2021] [Indexed: 11/19/2022]
Abstract
Currently ectomycorrhizal research suffers from a lack of molecular tools specifically adapted to study gene expression in fungal symbionts. Considering that, we designed pReNuK, a cloning vector for transcriptional promoter studies in the ectomycorrhizal basidiomycete Laccaria bicolor. The pReNuK vector offers the use of a nuclear localizing and chromatin incorporating histone H2B-mCherry fluorescent reporter protein and it is specifically optimized for efficient transgene expression in Laccaria. Moreover, pReNuK is designed to work in concert with Agrobacterium-mediated transformation under hygromycin B resistance selection. The functionality of the pReNuK reporter system was tested with the constitutive Laccaria glyceraldehyde 3-phosphate dehydrogenase gene promoter and further validated with the nitrogen source regulated nitrate reductase gene promoter. The expression of the nucleus-directed H2B-mCherry reporter is highly stable in time. Moreover, the transformation of Laccaria with pReNuK and the expression of the reporter do not have negative effects on the growth of the fungus. The pReNuK offers a novel tool for studying in vivo gene expression regulation in Laccaria, the leading fungal model for ectomycorrhizal research.
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Affiliation(s)
- Minna Kemppainen
- Laboratory of Molecular Mycology, Institute of Basic and Applied Microbiology, Department of Science and Technology, National University of Quilmes and CONICET, Bernal, Province of Buenos Aires, Argentina.
| | - Alejandro Pardo
- Laboratory of Molecular Mycology, Institute of Basic and Applied Microbiology, Department of Science and Technology, National University of Quilmes and CONICET, Bernal, Province of Buenos Aires, Argentina
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Wong Fong Sang IE, Schroer J, Halbhuber L, Warm D, Yang JW, Luhmann HJ, Kilb W, Sinning A. Optogenetically Controlled Activity Pattern Determines Survival Rate of Developing Neocortical Neurons. Int J Mol Sci 2021; 22:6575. [PMID: 34205237 PMCID: PMC8235092 DOI: 10.3390/ijms22126575] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/16/2021] [Accepted: 06/16/2021] [Indexed: 12/29/2022] Open
Abstract
A substantial proportion of neurons undergoes programmed cell death (apoptosis) during early development. This process is attenuated by increased levels of neuronal activity and enhanced by suppression of activity. To uncover whether the mere level of activity or also the temporal structure of electrical activity affects neuronal death rates, we optogenetically controlled spontaneous activity of synaptically-isolated neurons in developing cortical cultures. Our results demonstrate that action potential firing of primary cortical neurons promotes neuronal survival throughout development. Chronic patterned optogenetic stimulation allowed to effectively modulate the firing pattern of single neurons in the absence of synaptic inputs while maintaining stable overall activity levels. Replacing the burst firing pattern with a non-physiological, single pulse pattern significantly increased cell death rates as compared to physiological burst stimulation. Furthermore, physiological burst stimulation led to an elevated peak in intracellular calcium and an increase in the expression level of classical activity-dependent targets but also decreased Bax/BCL-2 expression ratio and reduced caspase 3/7 activity. In summary, these results demonstrate at the single-cell level that the temporal pattern of action potentials is critical for neuronal survival versus cell death fate during cortical development, besides the pro-survival effect of action potential firing per se.
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Affiliation(s)
| | | | | | | | | | | | | | - Anne Sinning
- Institute of Physiology, University Medical Center Mainz, Johannes Gutenberg University, Duesbergweg 6, 55128 Mainz, Germany; (I.E.W.F.S.); (J.S.); (L.H.); (D.W.); (J.-W.Y.); (H.J.L.); (W.K.)
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10
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Ge Q, Zhang Y, Xu Y, Bai M, Luo W, Wang B, Niu Y, Zhao Y, Li S, Weng Y, Wang Z, Qian Q, Chong K. Cyclophilin OsCYP20-2 with a novel variant integrates defense and cell elongation for chilling response in rice. THE NEW PHYTOLOGIST 2020; 225:2453-2467. [PMID: 31736073 PMCID: PMC7064896 DOI: 10.1111/nph.16324] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/31/2019] [Indexed: 05/20/2023]
Abstract
Coordinating stress defense and plant growth is a survival strategy for adaptation to different environments that contains a series of processes, such as, cell growth, division and differentiation. However, little is known about the coordination mechanism for protein conformation change. A cyclophilin OsCYP20-2 with a variant interacts with SLENDER RICE1 (SLR1) and OsFSD2 in the nucleus and chloroplasts, respectively, to integrate chilling tolerance and cell elongation in rice (Oryza sativa) (FSD2, Fe-superoxide dismutase 2). Mass spectrum assay showed that OsNuCYP20-2 localized at the nucleus (nuclear located OsCYP20-2) was a new variant of OsCYP20-2 that truncated 71 amino-acid residues in N-terminal. The loss-of function OsCYP20-2 mutant showed sensitivity to chilling stress with accumulation of extra reactive oxygen species (ROS). In chloroplasts, the full-length OsCYP20-2 promotes OsFSD2 forming homodimers which enhance its activity, eliminating the accumulation of ROS under chilling stress. However, the mutant had shorter epidermal cells in comparison with wild-type Hwayoung (HY). In the nucleus, OsCYP20-2 caused conformation change of SLR1 to promote its degradation for cell elongation. Our data reveal a cyclophilin with a variant with dual-localization in chloroplasts and the nucleus, which mediate chilling tolerance and cell elongation.
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Affiliation(s)
- Qiang Ge
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
- University of Chinese Academy of SciencesBeijing100049China
| | - Yuanyuan Zhang
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
| | - Yunyuan Xu
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
- Innovation Academy for Seed DesignChinese Academy of SciencesBeijing100101China
| | - Mingyi Bai
- The Key Laboratory of Plant Cell Engineering and Germplasm InnovationMinistry of EducationSchool of Life SciencesShandong UniversityJinan250100China
| | - Wei Luo
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
| | - Bo Wang
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
- University of Chinese Academy of SciencesBeijing100049China
| | - Yuda Niu
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
| | - Yuan Zhao
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
- University of Chinese Academy of SciencesBeijing100049China
| | - Shanshan Li
- Laboratory of Soft Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
| | - Yuxiang Weng
- Laboratory of Soft Matter PhysicsInstitute of PhysicsChinese Academy of SciencesBeijing100190China
| | - Zhiyong Wang
- Department of Plant BiologyCarnegie Institution for ScienceStanfordCA94305USA
| | - Qian Qian
- State Key Laboratory of Rice BiologyChina National Rice Research InstituteChinese Academy of Agricultural SciencesHangzhou310006China
| | - Kang Chong
- Key Laboratory of Plant Molecular PhysiologyInstitute of BotanyChinese Academy of SciencesBeijing100093China
- University of Chinese Academy of SciencesBeijing100049China
- Innovation Academy for Seed DesignChinese Academy of SciencesBeijing100101China
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11
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Yan Y, Ham BK, Chong YH, Yeh SD, Lucas WJ. A Plant SMALL RNA-BINDING PROTEIN 1 Family Mediates Cell-to-Cell Trafficking of RNAi Signals. MOLECULAR PLANT 2020; 13:321-335. [PMID: 31812689 DOI: 10.1016/j.molp.2019.12.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/30/2019] [Accepted: 12/02/2019] [Indexed: 05/20/2023]
Abstract
In plants, RNA interference (RNAi) plays a pivotal role in growth and development, and responses to environmental inputs, including pathogen attack. The intercellular and systemic trafficking of small interfering RNA (siRNA)/microRNA (miRNA) is a central component in this regulatory pathway. Currently, little is known with regards to the molecular agents involved in the movement of these si/miRNAs. To address this situation, we employed a biochemical approach to identify and characterize a conserved SMALL RNA-BINDING PROTEIN 1 (SRBP1) family that mediates non-cell-autonomous small RNA (sRNA) trafficking. In Arabidopsis, AtSRBP1 is a glycine-rich (GR) RNA-binding protein, also known as AtGRP7, which we show binds single-stranded siRNA. A viral vector, Zucchini yellow mosaic virus (ZYMV), was employed to functionally characterized the AtSRBP1-4 (AtGRP7/2/4/8) RNA recognition motif and GR domains. Cellular-based studies revealed the GR domain as being necessary and sufficient for SRBP1 cell-to-cell movement. Taken together, our findings provide a foundation for future research into the mechanism and function of mobile sRNA signaling agents in plants.
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Affiliation(s)
- Yan Yan
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA
| | - Byung-Kook Ham
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA
| | - Yee Hang Chong
- Department of Plant Pathology, National Chung-Hsing University, Taichung
| | - Shyi-Dong Yeh
- Department of Plant Pathology, National Chung-Hsing University, Taichung
| | - William J Lucas
- Department of Plant Biology, College of Biological Sciences, University of California, Davis, CA 95616, USA.
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12
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Yang J, Yuan Z, Meng Q, Huang G, Périn C, Bureau C, Meunier AC, Ingouff M, Bennett MJ, Liang W, Zhang D. Dynamic Regulation of Auxin Response during Rice Development Revealed by Newly Established Hormone Biosensor Markers. FRONTIERS IN PLANT SCIENCE 2017; 8:256. [PMID: 28326089 PMCID: PMC5339295 DOI: 10.3389/fpls.2017.00256] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 02/10/2017] [Indexed: 05/18/2023]
Abstract
The hormone auxin is critical for many plant developmental processes. Unlike the model eudicot plant Arabidopsis (Arabidopsis thaliana), auxin distribution and signaling in rice tissues has not been systematically investigated due to the absence of suitable auxin response reporters. In this study we observed the conservation of auxin signaling components between Arabidopsis and model monocot crop rice (Oryza sativa), and generated complementary types of auxin biosensor constructs, one derived from the Aux/IAA-based biosensor DII-VENUS but constitutively driven by maize ubiquitin-1 promoter, and the other termed DR5-VENUS in which a synthetic auxin-responsive promoter (DR5rev ) was used to drive expression of the yellow fluorescent protein (YFP). Using the obtained transgenic lines, we observed that during the vegetative development, accumulation of DR5-VENUS signal was at young and mature leaves, tiller buds and stem base. Notably, abundant DR5-VENUS signals were observed in the cytoplasm of cortex cells surrounding lateral root primordia (LRP) in rice. In addition, auxin maxima and dynamic re-localization were seen at the initiation sites of inflorescence and spikelet primordia including branch meristems (BMs), female and male organs. The comparison of these observations among Arabidopsis, rice and maize suggests the unique role of auxin in regulating rice lateral root emergence and reproduction. Moreover, protein localization of auxin transporters PIN1 homologs and GFP tagged OsAUX1 overlapped with DR5-VENUS during spikelet development, helping validate these auxin response reporters are reliable markers in rice. This work firstly reveals the direct correspondence between auxin distribution and rice reproductive and root development at tissue and cellular level, and provides high-resolution auxin tools to probe fundamental developmental processes in rice and to establish links between auxin, development and agronomical traits like yield or root architecture.
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Affiliation(s)
- Jing Yang
- Key Laboratory of Systems Biomedicine, Ministry of Education, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong UniversityShanghai, China
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
| | - Zheng Yuan
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
| | - Qingcai Meng
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
| | - Guoqiang Huang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
| | | | | | | | | | - Malcolm J. Bennett
- Centre for Plant Integrative Biology, School of Biosciences, University of NottinghamSutton Bonington, UK
| | - Wanqi Liang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
| | - Dabing Zhang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, Shanghai Jiao Tong University–University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong UniversityShanghai, China
- School of Agriculture, Food and Wine, University of AdelaideUrrbrae, SA, Australia
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13
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Shi Q, Zhang H, Song X, Jiang Y, Liang R, Li G. Functional Characterization of the Maize Phytochrome-Interacting Factors PIF4 and PIF5. FRONTIERS IN PLANT SCIENCE 2017; 8:2273. [PMID: 29403515 PMCID: PMC5778267 DOI: 10.3389/fpls.2017.02273] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 12/29/2017] [Indexed: 05/21/2023]
Abstract
UNLABELLED Phytochrome-interacting factors (PIFs) play important roles in photomorphogenesis, the shade avoidance response, and other aspects of plant growth and development. PIF family proteins have been well-studied in Arabidopsis thaliana, but little is known about their physiological functions and molecular mechanisms in maize (Zea mays). In this study, we investigated the physiological functions of ZmPIF4 and ZmPIF5, two highly conserved members of the PIF gene family. RT-qPCR and western blot analyses revealed that ZmPIF4 and ZmPIF5 expression and ZmPIF4 and ZmPIF5 levels peak at night and remain low during the day. Overexpression of ZmPIF4 and ZmPIF5 in Arabidopsis partially rescued the reduced hypocotyl elongation and defective response to gravity in pif1 pif3 pif4 pif5 quadruple mutants (pifq). In addition, under high red: far-red light conditions, Arabidopsis lines overexpressing ZmPIF4 exhibited a constitutive shade avoidance response, including early flowering, slender leaves and inflorescences, plant lodging and precocious leaf senescence. Furthermore, ZmPIF4 physically interacted with the Arabidopsis DELLA protein REPRESSOR OF GA1-3 (RGA), indicating a potential interaction between ZmPIF4 and gibberellin signaling pathway on plant growth. Taken together, our results revealed that ZmPIF4 and ZmPIF5 are functionally conserved proteins that may play conserved roles in the response to phytochrome signaling in plants. HIGHLIGHTS In this study, the functions of ZmPIF4 and ZmPIF5 were characterized by expression in Arabidopsis, revealing conserved roles of PIF family proteins in photomorphogenesis and the shade avoidance response in land plants.
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14
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Vera DL, Madzima TF, Labonne JD, Alam MP, Hoffman GG, Girimurugan SB, Zhang J, McGinnis KM, Dennis JH, Bass HW. Differential nuclease sensitivity profiling of chromatin reveals biochemical footprints coupled to gene expression and functional DNA elements in maize. THE PLANT CELL 2014; 26:3883-93. [PMID: 25361955 PMCID: PMC4247582 DOI: 10.1105/tpc.114.130609] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/03/2014] [Accepted: 10/14/2014] [Indexed: 05/19/2023]
Abstract
The eukaryotic genome is organized into nucleosomes, the fundamental units of chromatin. The positions of nucleosomes on DNA regulate protein-DNA interactions and in turn influence DNA-templated events. Despite the increasing number of genome-wide maps of nucleosome position, how global changes in gene expression relate to changes in nucleosome position is poorly understood. We show that in nucleosome occupancy mapping experiments in maize (Zea mays), particular genomic regions are highly susceptible to variation introduced by differences in the extent to which chromatin is digested with micrococcal nuclease (MNase). We exploited this digestion-linked variation to identify protein footprints that are hypersensitive to MNase digestion, an approach we term differential nuclease sensitivity profiling (DNS-chip). Hypersensitive footprints were enriched at the 5' and 3' ends of genes, associated with gene expression levels, and significantly overlapped with conserved noncoding sequences and the binding sites of the transcription factor KNOTTED1. We also found that the tissue-specific regulation of gene expression was linked to tissue-specific hypersensitive footprints. These results reveal biochemical features of nucleosome organization that correlate with gene expression levels and colocalize with functional DNA elements. This approach to chromatin profiling should be broadly applicable to other species and should shed light on the relationships among chromatin organization, protein-DNA interactions, and genome regulation.
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Affiliation(s)
- Daniel L Vera
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Thelma F Madzima
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Jonathan D Labonne
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Mohammad P Alam
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Gregg G Hoffman
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - S B Girimurugan
- Department of Statistics, Florida State University, Tallahassee, Florida 32306
| | - Jinfeng Zhang
- Department of Statistics, Florida State University, Tallahassee, Florida 32306
| | - Karen M McGinnis
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Jonathan H Dennis
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
| | - Hank W Bass
- Department of Biological Science, Florida State University, Tallahassee, Florida 32306-4295
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15
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Ohnishi Y, Hoshino R, Okamoto T. Dynamics of Male and Female Chromatin during Karyogamy in Rice Zygotes. PLANT PHYSIOLOGY 2014; 165:1533-1543. [PMID: 24948834 PMCID: PMC4119036 DOI: 10.1104/pp.114.236059] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 06/14/2014] [Indexed: 05/20/2023]
Abstract
In angiosperms, the conversion of an egg cell into a zygote involves two sequential gametic processes: plasmogamy, the fusion of the plasma membranes of male and female gametes, and karyogamy, the fusion of the gametic nuclei. In this study, the nuclei and nuclear membranes of rice (Oryza sativa) gametes were fluorescently labeled using histones 2B-green fluorescent protein/red fluorescent protein and Sad1/UNC-84-domain protein2-green fluorescent protein, respectively, which were heterologously expressed. These gametes were fused in vitro to produce zygotes, and the nuclei and nuclear membranes in the zygotes were observed during karyogamy. The results indicated that the sperm nucleus migrates adjacent to the egg nucleus 5 to 10 min after plasmogamy via an actin cytoskelton, and the egg chromatin then appears to move unidirectionally into the sperm nucleus through a possible nuclear connection. The enlargement of the sperm nucleus accompanies this possible chromatin remodeling. Then, 30 to 70 min after fusion, the sperm chromatin begins to decondense with the completion of karyogamy. Based on these observations, the development of early rice zygotes from plasmogamy to karyogamy was divided into eight stages, and using reverse transcription PCR analyses, paternal and de novo synthesized transcripts were separately detected in zygotes at early and late karyogamy stages, respectively.
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Affiliation(s)
- Yukinosuke Ohnishi
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Rina Hoshino
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
| | - Takashi Okamoto
- Department of Biological Sciences, Tokyo Metropolitan University, Tokyo 192-0397, Japan
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16
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Howe ES, Murphy SP, Bass HW. Three-dimensional acrylamide fluorescence in situ hybridization for plant cells. Methods Mol Biol 2013; 990:53-66. [PMID: 23559202 DOI: 10.1007/978-1-62703-333-6_6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Plant meiosis involves complex and dynamic processes that occur within the space inside the nucleus. Direct inspection of meiotic chromosomes by fluorescence microscopy has been used to investigate many of these processes. In particular, optical sectioning microscopy of fluorescence in situ hybridization (FISH)-stained nuclei provides three-dimensional spatial information about the organization and distribution of specific sequences and chromosomal loci within the nucleus. Here we provide a fully detailed three-dimensional (3D) acrylamide FISH method for the analysis of plant meiotic nuclei. Several examples illustrate the versatility of this technique for the investigation of meiotic telomere dynamics in maize, Arabidopsis, and oat. Additional examples of 3D FISH include chromosome painting in a maize chromosome-addition line of oat and telomere FISH with maize nuclei from plants expressing a fluorescently tagged fusion protein, histone H2B-mCherry.
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Affiliation(s)
- Elizabeth S Howe
- Department of Biological Science, The Florida State University, Tallahassee, FL, USA
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