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Miao Y, You H, Liu H, Zhao Y, Zhao J, Li Y, Shen Y, Tang D, Liu B, Zhang K, Cheng Z. RETINOBLASTOMA RELATED 1 switches mitosis to meiosis in rice. PLANT COMMUNICATIONS 2024; 5:100857. [PMID: 38433446 PMCID: PMC11211523 DOI: 10.1016/j.xplc.2024.100857] [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: 09/22/2023] [Revised: 02/07/2024] [Accepted: 02/27/2024] [Indexed: 03/05/2024]
Abstract
The transition from mitosis to meiosis is a critical event in the reproductive development of all sexually reproducing species. However, the mechanisms that regulate this process in plants remain largely unknown. Here, we find that the rice (Oryza sativa L.) protein RETINOBLASTOMA RELATED 1 (RBR1) is essential to the transition from mitosis to meiosis. Loss of RBR1 function results in hyper-proliferative sporogenous-cell-like cells (SCLs) in the anther locules during early stages of reproductive development. These hyper-proliferative SCLs are unable to initiate meiosis, eventually stagnating and degrading at late developmental stages to form pollen-free anthers. These results suggest that RBR1 acts as a gatekeeper of entry into meiosis. Furthermore, cytokinin content is significantly increased in rbr1 mutants, whereas the expression of type-B response factors, particularly LEPTO1, is significantly reduced. Given the known close association of cytokinins with cell proliferation, these findings imply that hyper-proliferative germ cells in the anther locules may be attributed to elevated cytokinin concentrations and disruptions in the cytokinin pathway. Using a genetic strategy, the association between germ cell hyper-proliferation and disturbed cytokinin signaling in rbr1 has been confirmed. In summary, we reveal a unique role of RBR1 in the initiation of meiosis; our results clearly demonstrate that the RBR1 regulatory module is connected to the cytokinin signaling pathway and switches mitosis to meiosis in rice.
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Affiliation(s)
- Yongjie Miao
- Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou 510006, China; Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College of Yangzhou University, Yangzhou 225009, China
| | - Hanli You
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College of Yangzhou University, Yangzhou 225009, China
| | - Huixin Liu
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Yangzi Zhao
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Jiangzhe Zhao
- Zhejiang Provincial Key Laboratory of Biotechnology on Specialty Economic Plants, Department of Biology, College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China
| | - Yafei Li
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Yi Shen
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Ding Tang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijing 100101, China
| | - Baohui Liu
- Guangdong Provincial Key Laboratory of Plant Adaptation and Molecular Design, Innovative Center of Molecular Genetics and Evolution, School of Life Sciences, Guangzhou University, Guangzhou 510006, China.
| | - Kewei Zhang
- Zhejiang Provincial Key Laboratory of Biotechnology on Specialty Economic Plants, Department of Biology, College of Life Sciences, Zhejiang Normal University, Jinhua 321004, China.
| | - Zhukuan Cheng
- Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding/Zhongshan Biological Breeding Laboratory/Key Laboratory of Plant Functional Genomics of the Ministry of Education, Agricultural College of Yangzhou University, Yangzhou 225009, China; Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops/Jiangsu Key Laboratory of Crop Genetics and Physiology, Yangzhou University, Yangzhou 225009, China.
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Jiang Z, Wang X, Zhou Z, Peng L, Lin X, Luo X, Song Y, Ning H, Gan C, He X, Zhu C, Ouyang L, Zhou D, Cai Y, Xu J, He H, Liu Y. Functional characterization of D-type cyclins involved in cell division in rice. BMC PLANT BIOLOGY 2024; 24:157. [PMID: 38424498 PMCID: PMC10905880 DOI: 10.1186/s12870-024-04828-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
BACKGROUND D-type cyclins (CYCD) regulate the cell cycle G1/S transition and are thus closely involved in cell cycle progression. However, little is known about their functions in rice. RESULTS We identified 14 CYCD genes in the rice genome and confirmed the presence of characteristic cyclin domains in each. The expression of the OsCYCD genes in different tissues was investigated. Most OsCYCD genes were expressed at least in one of the analyzed tissues, with varying degrees of expression. Ten OsCYCD proteins could interact with both retinoblastoma-related protein (RBR) and A-type cyclin-dependent kinases (CDKA) forming holistic complexes, while OsCYCD3;1, OsCYCD6;1, and OsCYCD7;1 bound only one component, and OsCYCD4;2 bound to neither protein. Interestingly, all OsCYCD genes except OsCYCD7;1, were able to induce tobacco pavement cells to re-enter mitosis with different efficiencies. Transgenic rice plants overexpressing OsCYCD2;2, OsCYCD6;1, and OsCYCD7;1 (which induced cell division in tobacco with high-, low-, and zero-efficiency, respectively) were created. Higher levels of cell division were observed in both the stomatal lineage and epidermal cells of the OsCYCD2;2- and OsCYCD6;1-overexpressing plants, with lower levels seen in OsCYCD7;1-overexpressing plants. CONCLUSIONS The distinct expression patterns and varying effects on the cell cycle suggest different functions for the various OsCYCD proteins. Our findings will enhance understanding of the CYCD family in rice and provide a preliminary foundation for the future functional verification of these genes.
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Affiliation(s)
- Zhishu Jiang
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xin Wang
- Jiangxi Province Forest Resources Protection Center, Nanchang, 330008, Jiangxi, China
| | - Zhiwei Zhou
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Limei Peng
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xiaoli Lin
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xiaowei Luo
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Yongping Song
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Huaying Ning
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Cong Gan
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Xiaopeng He
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Changlan Zhu
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Linjuan Ouyang
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Dahu Zhou
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Yicong Cai
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China
| | - Jie Xu
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China.
| | - Haohua He
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China.
| | - Yantong Liu
- Key Laboratory of Crop Physiology, Ecology, and Genetic Breeding of the Ministry of Education, Jiangxi Agricultural University, Nanchang, Jiangxi, China.
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Qiu R, Liu Y, Cai Z, Li J, Wu C, Wang G, Lin C, Peng Y, Deng Z, Tang W, Wu W, Duan Y. Glucan Synthase-like 2 is Required for Seed Initiation and Filling as Well as Pollen Fertility in Rice. RICE (NEW YORK, N.Y.) 2023; 16:44. [PMID: 37804355 PMCID: PMC10560172 DOI: 10.1186/s12284-023-00662-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 09/25/2023] [Indexed: 10/09/2023]
Abstract
BACKGROUND The Glucan synthase-like (GSL) genes are indispensable for some important highly-specialized developmental and cellular processes involving callose synthesis and deposition in plants. At present, the best-characterized reproductive functions of GSL genes are those for pollen formation and ovary expansion, but their role in seed initiation remains unknown. RESULTS We identified a rice seed mutant, watery seed 1-1 (ws1-1), which contained a mutation in the OsGSL2 gene. The mutant produced seeds lacking embryo and endosperm but filled with transparent and sucrose-rich liquid. In a ws1-1 spikelet, the ovule development was normal, but the microsporogenesis and male gametophyte development were compromised, resulting in the reduction of fertile pollen. After fertilization, while the seed coat normally developed, the embryo failed to differentiate normally. In addition, the divided endosperm-free nuclei did not migrate to the periphery of the embryo sac but aggregated so that their proliferation and cellularization were arrested. Moreover, the degeneration of nucellus cells was delayed in ws1-1. OsGSL2 is highly expressed in reproductive organs and developing seeds. Disrupting OsGSL2 reduced callose deposition on the outer walls of the microspores and impaired the formation of the annular callose sheath in developing caryopsis, leading to pollen defect and seed abortion. CONCLUSIONS Our findings revealed that OsGSL2 is essential for rice fertility and is required for embryo differentiation and endosperm-free nucleus positioning, indicating a distinct role of OsGSL2, a callose synthase gene, in seed initiation, which provides new insight into the regulation of seed development in cereals.
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Affiliation(s)
- Ronghua Qiu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yang Liu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhengzheng Cai
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jieqiong Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Chunyan Wu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Gang Wang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Chenchen Lin
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Yulin Peng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Zhanlin Deng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Weiqi Tang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Weiren Wu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
| | - Yuanlin Duan
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
- Fujian Key Laboratory of Crop Breeding By Design, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.
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Cai Z, Wang G, Li J, Kong L, Tang W, Chen X, Qu X, Lin C, Peng Y, Liu Y, Deng Z, Ye Y, Wu W, Duan Y. Thermo-Sensitive Spikelet Defects 1 acclimatizes rice spikelet initiation and development to high temperature. PLANT PHYSIOLOGY 2023; 191:1684-1701. [PMID: 36517254 PMCID: PMC10022635 DOI: 10.1093/plphys/kiac576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 10/20/2022] [Indexed: 06/17/2023]
Abstract
Crop reproductive development is vulnerable to heat stress, and the genetic modulation of thermotolerance during the reproductive phase, especially the early stage, remains poorly understood. We isolated a Poaceae-specific FAR-RED ELONGATED HYPOCOTYLS3 (FHY3)/FAR-RED IMPAIRED RESPONSE1 (FAR1)family transcription factor, Thermo-sensitive Spikelet Defects 1 (TSD1), derived from transposase in rice (Oryza sativa) TSD1 was highly expressed in spikelets, induced by heat, and specifically enhanced the thermotolerance of spikelet morphogenesis. Disrupting TSD1 did not affect vegetative growth but markedly retarded spikelet initiation and development, as well as caused varying degrees of spikelet degeneration, depending on the temperature. Most tsd1 spikelets were normal at low temperature but gradually degenerated as temperature increased, and all disappeared at high temperature, leading to naked branches. TSD1 directly promoted the transcription of YABBY1 and YABBY3 and could physically interact with YABBY1 and three TOB proteins, YABBY5, YABBY4, and YABBY3. These YABBY proteins can form either homodimers or heterodimers and play an important role in spikelet morphogenesis, similar to TSD1. Notably, the knockout mutant yab5-ko and double mutant tsd1 yab5-ko resembled tsd1 in spikelet appearance and response to temperature, indicating that these genes likely participate in spikelet development through the cooperative TSD1-YABBY module. These findings reveal a distinctive function of FHY3/FAR1 family genes and a unique TSD1-YABBY complex to acclimate spikelet development to high temperature in rice, providing insight into the regulating pathway of enhancing thermotolerance in plant reproductive development.
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Affiliation(s)
- Zhengzheng Cai
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Gang Wang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Jieqiong Li
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Lan Kong
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Weiqi Tang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Xuequn Chen
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Xiaojie Qu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Chenchen Lin
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Yulin Peng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Yang Liu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Zhanlin Deng
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Yanfang Ye
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Weiren Wu
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
| | - Yuanlin Duan
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops and Fujian Provincial Key Laboratory of Breeding by Design of Plant, Fujian Agriculture & Forestry University, Fuzhou 350002, China
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Huang X, Zeng X, Cai M, Zhao D. The MSI1 member OsRBAP1 gene, identified by a modified MutMap method, is required for rice height and spikelet fertility. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 320:111201. [PMID: 35643623 DOI: 10.1016/j.plantsci.2022.111201] [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: 01/02/2022] [Revised: 01/24/2022] [Accepted: 01/29/2022] [Indexed: 05/10/2023]
Abstract
To explore the molecular mechanisms underlying plant height regulation, we isolated and characterized a stably inherited semi-dwarf mutant bgsd-2 from the ethane methyl sulfonate (EMS) mutant progeny of 'Ping Tang Wild-type (PTWT)', a rice (Oryza sativa ssp. japonica) landrace in Guizhou. Transcriptome sequencing and qRT-PCR analyses showed that a number of cellulose and lignin-related genes involved in cell wall biogenesis were substantially downregulated in bgsd-2. MutMap-based cloning revealed the occurrence of a single amino acid substitution in the LOC_Os01g51300 gene, belonging to the MSI1 (multicopy suppressor of IRA1) member OsRBAP1. The bgsd-2 mutation occurred in the 3rd exon of OsRBAP1, resulting in a nonsense mutation of a codon shift from glycine (G) to glutamic acid (E) at residue 65. Protein localization analysis uncovered that the OsRBAP1 gene encodes a nuclear-localized protein and that the mutation in bgsd-2 may affect the stability of the OsRBAP1 protein. The CRISPR/Cas9 system was used to switch off OsRBAP1 in PTWT to obtain the knockout mutant osrbap1, which exhibited a severe reduction in height and fertility. Cytological observations suggest that the dwarfism of osrabp1 may be caused by reduced cell size and numbers, and that male sterility may be due to abnormal microspore development. Transcriptome analysis revealed that OsRBAP1 defects can repress the expression of numerous essential genes, which regulate multiple developmental processes in plants. Altogether, our results suggest that OsRBAP1 plays an important role in the regulation of rice height and spikelet fertility.
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Affiliation(s)
- Xiaozhen Huang
- College of Tea Sciences, Guizhou University, 550025, Guiyang, China; The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Regions (Ministry of Education), Guizhou University, Guiyang, 550025, China
| | - Xiaofang Zeng
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Regions (Ministry of Education), Guizhou University, Guiyang, 550025, China
| | - Mingling Cai
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Regions (Ministry of Education), Guizhou University, Guiyang, 550025, China
| | - Degang Zhao
- The Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Regions (Ministry of Education), Guizhou University, Guiyang, 550025, China; Academy of Agricultural Sciences, Guiyang, 550006, China.
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Zhang L, Song J, Peng L, Xie W, Li S, Wang J. Comprehensive Biochemical, Physiological, and Transcriptomic Analyses Provide Insights Into Floral Bud Dormancy in Rhododendron delavayi Franch. Front Genet 2022; 13:856922. [PMID: 35656313 PMCID: PMC9152171 DOI: 10.3389/fgene.2022.856922] [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: 01/17/2022] [Accepted: 04/19/2022] [Indexed: 01/17/2023] Open
Abstract
Due to a scarcity of relevant data, the ornamental woody flower Rhododendron delavayi Franch. is examined in the current study for its low temperature-induced floral bud dormancy (late October-end December) aspect. This study used transcriptome data profiling and co-expression network analyses to identify the interplay between endogenous hormones and bud dormancy phases such as pre-dormancy, para-dormancy, endo-dormancy, eco-dormancy, and dormancy release. The biochemical and physiological assays revealed the significance of the abundance of phytohormones (abscisic acid, auxin, zeatin, and gibberellins), carbohydrate metabolism, oxidative species, and proteins (soluble proteins, proline, and malondialdehyde) in the regulatory mechanism of floral bud dormancy. The transcriptome sequencing generated 65,531 transcripts, out of which 504, 514, 307, and 240 expressed transcripts were mapped uniquely to pre-, para-, endo-, and eco-phases of dormancy, showing their roles in the stimulation of dormancy. The transcripts related to LEA29, PGM, SAUR family, RPL9e, ATRX, FLOWERING LOCUS T, SERK1, ABFs, ASR2, and GID1 were identified as potential structural genes involved in floral bud dormancy. The transcription factors, including Zinc fingers, CAD, MADS-box family, MYB, and MYC2, revealed their potential regulatory roles concerning floral bud dormancy. The gene co-expression analysis highlighted essential hub genes involved in cold stress adaptations encoding proteins, viz, SERPIN, HMA, PMEI, LEA_2, TRX, PSBT, and AMAT. We exposed the connection among low temperature-induced dormancy in floral buds, differentially expressed genes, and hub genes via strict screening steps to escalate the confidence in selected genes as being truly putative in the pathways regulating bud dormancy mechanism. The identified candidate genes may prove worthy of further in-depth studies on molecular mechanisms involved in floral bud dormancy of Rhododendron species.
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Affiliation(s)
- Lu Zhang
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
| | - Jie Song
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
| | - Lvchun Peng
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
| | - Weijia Xie
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
| | - Shifeng Li
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
| | - Jihua Wang
- Flower Research Institute of Yunnan Academy of Agricultural Sciences, Kunming, China.,National Engineering Research Center for Ornamental Horticulture, Kunming, China
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7
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Cai Z, Zhang Y, Tang W, Chen X, Lin C, Liu Y, Ye Y, Wu W, Duan Y. LUX ARRHYTHMO Interacts With ELF3a and ELF4a to Coordinate Vegetative Growth and Photoperiodic Flowering in Rice. FRONTIERS IN PLANT SCIENCE 2022; 13:853042. [PMID: 35401642 PMCID: PMC8993510 DOI: 10.3389/fpls.2022.853042] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 02/22/2022] [Indexed: 05/27/2023]
Abstract
The evening complex (EC) plays a critical role in photoperiod flowering in Arabidopsis. Nevertheless, the underlying functions of individual components and coordinate regulation mechanism of EC genes in rice flowering remain to be elucidated. Here, we characterized the critical role of LUX ARRHYTHMO (LUX) in photoperiod perception and coordinating vegetative growth and flowering in rice. Non-functional alleles of OsLUX extremely extended vegetative phase, leading to photoperiod-insensitive late flowering and great increase of grain yield. OsLUX displayed an obvious diurnal rhythm expression with the peak at dusk and promoted rice flowering via coordinating the expression of genes associated with the circadian clock and the output integrators of photoperiodic flowering. OsLUX combined with OsELF4a and OsELF3a or OsELF3b to form two ECs, of which the OsLUX-OsELF3a-OsELF4a was likely the dominant promoter for photoperiodic flowering. In addition, OsELF4a was also essential for promoting rice flowering. Unlike OsLUX, loss OsELF4a displayed a marginal influence under short-day (SD) condition, but markedly delayed flowering time under long-day (LD) condition. These results suggest that rice EC genes share the function of promoting flowering. This is agreement with the orthologs of SD plant, but opposite to the counterparts of LD species. Taken together, rice EC genes display similar but not identical function in photoperiodic flowering, probably through regulating gene expression cooperative and independent. These findings facilitate our understanding of photoperiodic flowering in plants, especially the SD crops.
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Affiliation(s)
- Zhengzheng Cai
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yudan Zhang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weiqi Tang
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Xuequn Chen
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Chenchen Lin
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yang Liu
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yanfang Ye
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Weiren Wu
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yuanlin Duan
- Key Laboratory of Genetics, Breeding and Multiple Utilization of Crops, Ministry of Education, Fujian Agriculture and Forestry University, Fuzhou, China
- Fujian Key Laboratory of Crop Breeding by Design, Fujian Agriculture and Forestry University, Fuzhou, China
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Transcriptomic Insight into Underground Floral Differentiation in Erythronium japonicum. BIOMED RESEARCH INTERNATIONAL 2022; 2022:4447472. [PMID: 35087909 PMCID: PMC8789427 DOI: 10.1155/2022/4447472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/23/2021] [Indexed: 12/18/2022]
Abstract
Erythronium japonicum Decne (Liliaceae) flowers in early spring after overwintering. Its sexual reproduction process includes an underground development process of floral organs, but the underlying molecular mechanisms are obscure. The present study is aimed at exploring the transcriptional changes and key genes involved at underground floral developmental stages, including flower primordium differentiation, perianth differentiation, stamen differentiation, and pistil differentiation in E. japonicum. Multistage high-quality transcriptomic data resulted in identifying putative candidate genes for underground floral differentiation in E. japonicum. A total of 174,408 unigenes were identified, 28,508 of which were differentially expressed genes (DEGs) at different floral developmental stages, while only 44 genes were identified with conserved regulation between different stages. Further annotation of DEGs resulted in the identification of 270 DEGs specific to floral differentiation. In addition, ELF3, PHD, cullin 1, SE14, ZSWIM3, GIGNATEA, and SERPIN B were identified as potential candidate genes involved in the regulation of floral differentiation. Besides, we explored transcription factors with differential regulation at different developmental stages and identified bHLH, FAR1, mTERF, MYB-related, NAC, Tify, and WRKY TFs for their potential involvement in the underground floral differentiation process. Together, these results laid the foundation for future molecular works to improve our understanding of the underground floral differentiation process and its genetic regulation in E. japonicum.
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Shen Q, Lin Y, Li Y, Wang G. Dynamics of H3K27me3 Modification on Plant Adaptation to Environmental Cues. PLANTS 2021; 10:plants10061165. [PMID: 34201297 PMCID: PMC8228231 DOI: 10.3390/plants10061165] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/30/2021] [Accepted: 06/01/2021] [Indexed: 12/13/2022]
Abstract
Given their sessile nature, plants have evolved sophisticated regulatory networks to confer developmental plasticity for adaptation to fluctuating environments. Epigenetic codes, like tri-methylation of histone H3 on Lys27 (H3K27me3), are evidenced to account for this evolutionary benefit. Polycomb repressive complex 2 (PRC2) and PRC1 implement and maintain the H3K27me3-mediated gene repression in most eukaryotic cells. Plants take advantage of this epigenetic machinery to reprogram gene expression in development and environmental adaption. Recent studies have uncovered a number of new players involved in the establishment, erasure, and regulation of H3K27me3 mark in plants, particularly highlighting new roles in plants’ responses to environmental cues. Here, we review current knowledge on PRC2-H3K27me3 dynamics occurring during plant growth and development, including its writers, erasers, and readers, as well as targeting mechanisms, and summarize the emerging roles of H3K27me3 mark in plant adaptation to environmental stresses.
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Desvoyes B, Gutierrez C. Roles of plant retinoblastoma protein: cell cycle and beyond. EMBO J 2020; 39:e105802. [PMID: 32865261 PMCID: PMC7527812 DOI: 10.15252/embj.2020105802] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 07/16/2020] [Accepted: 08/06/2020] [Indexed: 12/16/2022] Open
Abstract
The human retinoblastoma (RB1) protein is a tumor suppressor that negatively regulates cell cycle progression through its interaction with members of the E2F/DP family of transcription factors. However, RB-related (RBR) proteins are an early acquisition during eukaryote evolution present in plant lineages, including unicellular algae, ancient plants (ferns, lycophytes, liverworts, mosses), gymnosperms, and angiosperms. The main RBR protein domains and interactions with E2Fs are conserved in all eukaryotes and not only regulate the G1/S transition but also the G2/M transition, as part of DREAM complexes. RBR proteins are also important for asymmetric cell division, stem cell maintenance, and the DNA damage response (DDR). RBR proteins play crucial roles at every developmental phase transition, in association with chromatin factors, as well as during the reproductive phase during female and male gametes production and embryo development. Here, we review the processes where plant RBR proteins play a role and discuss possible avenues of research to obtain a full picture of the multifunctional roles of RBR for plant life.
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