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Luo L, Zheng Y, Li X, Chen Q, Yang D, Gu Z, Yang Y, Yang Y, Kong X, Yang Y. ICE1 interacts with IDD14 to transcriptionally activate QQS to increase pollen germination and viability. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2024; 66:1801-1819. [PMID: 38940322 DOI: 10.1111/jipb.13725] [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: 04/08/2024] [Accepted: 05/23/2024] [Indexed: 06/29/2024]
Abstract
In flowering plants, sexual reproductive success depends on the production of viable pollen grains. However, the mechanisms by which QUA QUINE STARCH (QQS) regulates pollen development and how transcriptional activators facilitate the transcription of QQS in this process remain poorly understood. Here, we demonstrate that INDUCER OF CBF EXPRESSION 1 (ICE1), a basic helix-loop-helix (bHLH) transcription factor, acts as a key transcriptional activator and positively regulates QQS expression to increase pollen germination and viability in Arabidopsis thaliana by interacting with INDETERMINATE DOMAIN14 (IDD14). In our genetic and biochemical experiments, overexpression of ICE1 greatly promoted both the activation of QQS and high pollen viability mediated by QQS. IDD14 additively enhanced ICE1 function by promoting the binding of ICE1 to the QQS promoter. In addition, mutation of ICE1 significantly repressed QQS expression; the impaired function of QQS and the abnormal anther dehiscence jointly affected pollen development of the ice1-2 mutant. Our results also showed that the enhancement of pollen activity by ICE1 depends on QQS. Furthermore, QQS interacted with CUT1, the key enzyme for long-chain lipid biosynthesis. This interaction both promoted CUT1 activity and regulated pollen lipid metabolism, ultimately determining pollen hydration and fertility. Our results not only provide new insights into the key function of QQS in promoting pollen development by regulating pollen lipid metabolism, but also elucidate the mechanism that facilitates the transcription of QQS in this vital developmental process.
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Affiliation(s)
- Landi Luo
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yan Zheng
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Xieshengyang Li
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
- School of Agriculture, Yunnan University, Kunming, 650091, China
| | - Qian Chen
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Danni Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Zhijia Gu
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
- Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Ya Yang
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yunqiang Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Xiangxiang Kong
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
| | - Yongping Yang
- CAS Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, The Chinese Academy of Sciences, Xishuangbanna, 666303, China
- Germplasm Bank of Wild Species, Yunnan Key Laboratory for Crop Wild Relatives Omics, Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming, 650201, China
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Robil JM. A timely death of the tapetum underlies MORE FLORET1 (MOF1) regulation of male fertility in rice. PLANT PHYSIOLOGY 2024; 195:1759-1761. [PMID: 38593023 PMCID: PMC11213237 DOI: 10.1093/plphys/kiae208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 03/25/2024] [Accepted: 03/30/2024] [Indexed: 04/11/2024]
Affiliation(s)
- Janlo M Robil
- Assistant Features Editor, Plant Physiology, American Society of Plant Biologists
- Department of Biology, School of Science and Engineering, Ateneo de Manila University, Quezon City 1108, Philippines
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Chen W, Wang P, Liu C, Han Y, Zhao F. Male Germ Cell Specification in Plants. Int J Mol Sci 2024; 25:6643. [PMID: 38928348 PMCID: PMC11204311 DOI: 10.3390/ijms25126643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
Germ cells (GCs) serve as indispensable carriers in both animals and plants, ensuring genetic continuity across generations. While it is generally acknowledged that the timing of germline segregation differs significantly between animals and plants, ongoing debates persist as new evidence continues to emerge. In this review, we delve into studies focusing on male germ cell specifications in plants, and we summarize the core gene regulatory circuits in germ cell specification, which show remarkable parallels to those governing meristem homeostasis. The similarity in germline establishment between animals and plants is also discussed.
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Affiliation(s)
- Wenqian Chen
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi’an 710129, China; (W.C.); (P.W.); (C.L.); (Y.H.)
| | - Pan Wang
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi’an 710129, China; (W.C.); (P.W.); (C.L.); (Y.H.)
| | - Chan Liu
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi’an 710129, China; (W.C.); (P.W.); (C.L.); (Y.H.)
| | - Yuting Han
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi’an 710129, China; (W.C.); (P.W.); (C.L.); (Y.H.)
| | - Feng Zhao
- Shaanxi Key Laboratory of Qinling Ecological Intelligent Monitoring and Protection, School of Ecology and Environment, Northwestern Polytechnical University, Xi’an 710129, China; (W.C.); (P.W.); (C.L.); (Y.H.)
- Collaborative Innovation Center of Northwestern Polytechnical University, Shanghai 201108, China
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Fang Y, Guo D, Wang Y, Wang N, Fang X, Zhang Y, Li X, Chen L, Yu D, Zhang B, Qin G. Rice transcriptional repressor OsTIE1 controls anther dehiscence and male sterility by regulating JA biosynthesis. THE PLANT CELL 2024; 36:1697-1717. [PMID: 38299434 PMCID: PMC11062430 DOI: 10.1093/plcell/koae028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 12/12/2023] [Accepted: 12/24/2023] [Indexed: 02/02/2024]
Abstract
Proper anther dehiscence is essential for successful pollination and reproduction in angiosperms, and jasmonic acid (JA) is crucial for the process. However, the mechanisms underlying the tight regulation of JA biosynthesis during anther development remain largely unknown. Here, we demonstrate that the rice (Oryza sativa L.) ethylene-response factor-associated amphiphilic repression (EAR) motif-containing protein TEOSINTE BRANCHED1/CYCLOIDEA/PROLIFERATING CELL FACTORS (TCP) INTERACTOR CONTAINING EAR MOTIF PROTEIN1 (OsTIE1) tightly regulates JA biosynthesis by repressing TCP transcription factor OsTCP1/PCF5 during anther development. The loss of OsTIE1 function in Ostie1 mutants causes male sterility. The Ostie1 mutants display inviable pollen, early stamen filament elongation, and precocious anther dehiscence. In addition, JA biosynthesis is activated earlier and JA abundance is precociously increased in Ostie1 anthers. OsTIE1 is expressed during anther development, and OsTIE1 is localized in nuclei and has transcriptional repression activity. OsTIE1 directly interacts with OsTCP1, and overexpression of OsTCP1 caused early anther dehiscence resembling that of Ostie1. JA biosynthesis genes including rice LIPOXYGENASE are regulated by the OsTIE1-OsTCP1 complex. Our findings reveal that the OsTIE1-OsTCP1 module plays a critical role in anther development by finely tuning JA biosynthesis and provide a foundation for the generation of male sterile plants for hybrid seed production.
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Affiliation(s)
- Yuxing Fang
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China
| | - Dongshu Guo
- Provincial Key Laboratory of Agrobiology, Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Yi Wang
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China
| | - Ning Wang
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China
| | - Xianwen Fang
- Provincial Key Laboratory of Agrobiology, Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yunhui Zhang
- Provincial Key Laboratory of Agrobiology, Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Xiao Li
- Provincial Key Laboratory of Agrobiology, Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Letian Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Diqiu Yu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, School of Life Sciences, Yunnan University, Kunming 650091, China
- Southwest United Graduate School, Kunming 650092, China
| | - Baolong Zhang
- Provincial Key Laboratory of Agrobiology, Institute of Germplasm Resources and Biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Zhongshan Biological Breeding Laboratory, Nanjing, 210014, China
| | - Genji Qin
- State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China
- Southwest United Graduate School, Kunming 650092, China
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Liu X, Yu Z, Tong X, Chang L, Huang J, Wang Y, Ying J, Li X, Ni S, Zhang J. Fine Mapping of qAL5.2 Controlling Anther Length in Oryza sativa. PLANTS (BASEL, SWITZERLAND) 2024; 13:1130. [PMID: 38674540 PMCID: PMC11053959 DOI: 10.3390/plants13081130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 04/08/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
Anther length is the critical floral trait determining hybrid rice seed production and is controlled by many quantitative trait loci (QTL). However, the cloning of genes specifically controlling anther size has yet to be reported. Here, we report the fine mapping of qAL5.2 for anther size using backcross inbred lines (BILs) in the genetic background of Oryza sativa indica Huazhan (HZ). Gene chip analysis on the BC4F2 and BC5F1 population identified effective loci on Chr1, Chr5, and Chr8 and two genomic regions on Chr5, named qAL5.1 and qAL5.2. qAL5.2 was identified in both populations with LOD values of 17.54 and 10.19, which explained 35.73% and 25.1% of the phenotypic variances, respectively. Ultimately qAL5.2 was localized to a 73 kb region between HK139 and HK140 on chromosome 5. And we constructed two near-isogenic lines (NILs) for RNA-seq analysis, named NIL-qAL5.2HZ and NIL-qAL5.2KLY, respectively. The result of the GO enrichment analysis revealed that differential genes were significantly enriched in the carbohydrate metabolic process, extracellular region, and nucleic acid binding transcription, and KEGG enrichment analysis revealed that alpha-linolenic acid metabolism was significantly enriched. Meanwhile, candidate genes of qAL5.2 were analyzed in RNA-seq, and it was found that ORF8 is differentially expressed between NIL-qAL5.2HZ and NIL-qAL5.2KLY. The fine mapping of qAL5.2 conferring anther length will promote the breed improvement of the restorer line and understanding of the mechanisms driving crop mating patterns.
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Affiliation(s)
- Xinyong Liu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zixuan Yu
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Xiaohong Tong
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Longxue Chang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Jie Huang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Yifeng Wang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Jiezheng Ying
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Xingwang Li
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Shen Ni
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
| | - Jian Zhang
- State Key Laboratory of Rice Biology and Breeding, China National Rice Research Institute, Hangzhou 311400, China; (X.L.); (Y.W.)
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Yen CC, Hsu CM, Jiang PL, Jauh GY. Dynamic organelle changes and autophagic processes in lily pollen germination. BOTANICAL STUDIES 2024; 65:5. [PMID: 38273136 PMCID: PMC10811312 DOI: 10.1186/s40529-024-00410-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Accepted: 01/08/2024] [Indexed: 01/27/2024]
Abstract
Pollen germination is a crucial process in the life cycle of flowering plants, signifying the transition of quiescent pollen grains into active growth. This study delves into the dynamic changes within organelles and the pivotal role of autophagy during lily pollen germination. Initially, mature pollen grains harbor undifferentiated organelles, including amyloplasts, mitochondria, and the Golgi apparatus. However, germination unveils remarkable transformations, such as the redifferentiation of amyloplasts accompanied by starch granule accumulation. We investigate the self-sustained nature of amylogenesis during germination, shedding light on its association with osmotic pressure. Employing BODIPY 493/503 staining, we tracked lipid body distribution throughout pollen germination, both with or without autophagy inhibitors (3-MA, NEM). Typically, lipid bodies undergo polarized movement from pollen grains into elongating pollen tubes, a process crucial for directional growth. Inhibiting autophagy disrupted this essential lipid body redistribution, underscoring the interaction between autophagy and lipid body dynamics. Notably, the presence of tubular endoplasmic reticulum (ER)-like structures associated with developing amyloplasts and lipid bodies implies their participation in autophagy. Starch granules, lipid bodies, and membrane remnants observed within vacuoles further reinforce the involvement of autophagic processes. Among the autophagy inhibitors, particularly BFA, significantly impede germination and growth, thereby affecting Golgi morphology. Immunogold labeling substantiates the pivotal role of the ER in forming autophagosome-like compartments and protein localization. Our proposed speculative model of pollen germination encompasses proplastid differentiation and autophagosome formation. This study advances our understanding of organelle dynamics and autophagy during pollen germination, providing valuable insights into the realm of plant reproductive physiology.
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Affiliation(s)
- Chih-Chung Yen
- Institute of Plant and Microbial Biology, Academia Sinica, 11529, Taipei, Taiwan, ROC
| | - Chia-Mei Hsu
- Institute of Plant and Microbial Biology, Academia Sinica, 11529, Taipei, Taiwan, ROC
| | - Pei-Luen Jiang
- Department of Biotechnology, National Formosa University, Huwei Township, Yulin County, Taiwan.
| | - Guang-Yuh Jauh
- Institute of Plant and Microbial Biology, Academia Sinica, 11529, Taipei, Taiwan, ROC.
- Molecular and Biological Agricultural Sciences, International Graduate Program, National Chung-Hsing University, Academia Sinica, Taipei, Taiwan.
- Biotechnology Center, National Chung-Hsing University, Taichung, Taiwan.
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Ouedraogo I, Lartaud M, Baroux C, Mosca G, Delgado L, Leblanc O, Verdeil JL, Conéjéro G, Autran D. 3D cellular morphometrics of ovule primordium development in Zea mays reveal differential division and growth dynamics specifying megaspore mother cell singleness. FRONTIERS IN PLANT SCIENCE 2023; 14:1174171. [PMID: 37251753 PMCID: PMC10213557 DOI: 10.3389/fpls.2023.1174171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 04/07/2023] [Indexed: 05/31/2023]
Abstract
Introduction Differentiation of spore mother cells marks the somatic-to-reproductive transition in higher plants. Spore mother cells are critical for fitness because they differentiate into gametes, leading to fertilization and seed formation. The female spore mother cell is called the megaspore mother cell (MMC) and is specified in the ovule primordium. The number of MMCs varies by species and genetic background, but in most cases, only a single mature MMC enters meiosis to form the embryo sac. Multiple candidate MMC precursor cells have been identified in both rice and Arabidopsis, so variability in MMC number is likely due to conserved early morphogenetic events. In Arabidopsis, the restriction of a single MMC per ovule, or MMC singleness, is determined by ovule geometry. To look for potential conservation of MMC ontogeny and specification mechanisms, we undertook a morphogenetic description of ovule primordium growth at cellular resolution in the model crop maize. Methods We generated a collection of 48 three-dimensional (3D) ovule primordium images for five developmental stages, annotated for 11 cell types. Quantitative analysis of ovule and cell morphological descriptors allowed the reconstruction of a plausible developmental trajectory of the MMC and its neighbors. Results The MMC is specified within a niche of enlarged, homogenous L2 cells, forming a pool of candidate archesporial (MMC progenitor) cells. A prevalent periclinal division of the uppermost central archesporial cell formed the apical MMC and the underlying cell, a presumptive stack cell. The MMC stopped dividing and expanded, acquiring an anisotropic, trapezoidal shape. By contrast, periclinal divisions continued in L2 neighbor cells, resulting in a single central MMC. Discussion We propose a model where anisotropic ovule growth in maize drives L2 divisions and MMC elongation, coupling ovule geometry with MMC fate.
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Affiliation(s)
- Inès Ouedraogo
- DIADE, University of Montpellier, IRD, CIRAD, Montpellier, France
| | - Marc Lartaud
- AGAP, University of Montpellier, CIRAD, INRAE, Institut SupAgro, Montpellier, France
| | - Célia Baroux
- Institute of Plant and Microbial Biology, Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland
| | - Gabriella Mosca
- Institute of Plant and Microbial Biology, Zürich-Basel Plant Science Center, University of Zürich, Zürich, Switzerland
| | | | - Oliver Leblanc
- DIADE, University of Montpellier, IRD, CIRAD, Montpellier, France
| | - Jean-Luc Verdeil
- AGAP, University of Montpellier, CIRAD, INRAE, Institut SupAgro, Montpellier, France
| | - Geneviève Conéjéro
- IPSIM, University of Montpellier, CNRS, INRAE, Institut SupAgro, Montpellier, France
| | - Daphné Autran
- DIADE, University of Montpellier, IRD, CIRAD, Montpellier, France
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