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Huang CF, Liu WY, Yu CP, Wu SH, Ku MSB, Li WH. C 4 leaf development and evolution. CURRENT OPINION IN PLANT BIOLOGY 2023; 76:102454. [PMID: 37743123 DOI: 10.1016/j.pbi.2023.102454] [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: 06/03/2023] [Revised: 07/30/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023]
Abstract
C4 photosynthesis is more efficient than C3 photosynthesis for two reasons. First, C4 plants have evolved efficient C4 enzymes to suppress wasteful photorespiration and enhance CO2 fixation. Second, C4 leaves have Kranz anatomy in which the veins are surrounded by one layer of bundle sheath (BS) cells and one layer of mesophyll (M) cells. The BS and M cells are functionally well differentiated and also well coordinated for rapid assimilation of atmospheric CO2 and transport of photo-assimilates between the two types of cells. Recent comparative transcriptomics of developing M and BS cells in young maize embryonic leaves revealed not only potential regulators of BS and M cell differentiation but also rapid early BS cell differentiation whereas slower, more prolonged M cell differentiation, contrary to the traditional view of a far simpler process of M cell development. Moreover, new upstream regulators of Kranz anatomy development have been identified and a number of gene co-expression modules for early vascular development have been inferred. Also, a candidate gene regulatory network associated with Kranz anatomy and vascular development has been constructed. Additionally, how whole genome duplication (WGD) may facilitate C4 evolution has been studied and the reasons for why the same WGD event led to successful C4 evolution in Gynandropsis gynandra but not in the sister species Tarenaya hassleriana have been proposed. Finally, new future research directions are suggested.
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Affiliation(s)
- Chi-Fa Huang
- Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan
| | - Wen-Yu Liu
- Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan
| | - Chun-Ping Yu
- Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan
| | - Shu-Hsing Wu
- Institute of Plant and Microbial Biology, Academia Sinica, 115 Taipei, Taiwan
| | - Maurice S B Ku
- Institute of Bioagricultural Science, National Chiayi University, 600 Chiayi, Taiwan.
| | - Wen-Hsiung Li
- Biodiversity Research Center, Academia Sinica, 115 Taipei, Taiwan; Department of Ecology and Evolution, University of Chicago, Chicago 60637, USA.
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Xue X, Beuchat G, Wang J, Yu YC, Moose S, Chen J, Chen LQ. Sugar accumulation enhancement in sorghum stem is associated with reduced reproductive sink strength and increased phloem unloading activity. FRONTIERS IN PLANT SCIENCE 2023; 14:1233813. [PMID: 37767289 PMCID: PMC10519796 DOI: 10.3389/fpls.2023.1233813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023]
Abstract
Sweet sorghum has emerged as a promising source of bioenergy mainly due to its high biomass and high soluble sugar yield in stems. Studies have shown that loss-of-function Dry locus alleles have been selected during sweet sorghum domestication, and decapitation can further boost sugar accumulation in sweet sorghum, indicating that the potential for improving sugar yields is yet to be fully realized. To maximize sugar accumulation, it is essential to gain a better understanding of the mechanism underlying the massive accumulation of soluble sugars in sweet sorghum stems in addition to the Dry locus. We performed a transcriptomic analysis upon decapitation of near-isogenic lines for mutant (d, juicy stems, and green leaf midrib) and functional (D, dry stems and white leaf midrib) alleles at the Dry locus. Our analysis revealed that decapitation suppressed photosynthesis in leaves, but accelerated starch metabolic processes in stems. SbbHLH093 negatively correlates with sugar levels supported by genotypes (DD vs. dd), treatments (control vs. decapitation), and developmental stages post anthesis (3d vs.10d). D locus gene SbNAC074A and other programmed cell death-related genes were downregulated by decapitation, while sugar transporter-encoding gene SbSWEET1A was induced. Both SbSWEET1A and Invertase 5 were detected in phloem companion cells by RNA in situ assay. Loss of the SbbHLH093 homolog, AtbHLH093, in Arabidopsis led to a sugar accumulation increase. This study provides new insights into sugar accumulation enhancement in bioenergy crops, which can be potentially achieved by reducing reproductive sink strength and enhancing phloem unloading.
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Affiliation(s)
- Xueyi Xue
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Gabriel Beuchat
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Jiang Wang
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Ya-Chi Yu
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Stephen Moose
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
| | - Jin Chen
- Institute for Biomedical Informatics, University of Kentucky, Lexington, KY, United States
| | - Li-Qing Chen
- Department of Energy (DOE) Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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Cheng J, Shi Y, Wang J, Duan C, Yu K. Transcription factor VvibHLH93 negatively regulates proanthocyanidin biosynthesis in grapevine. FRONTIERS IN PLANT SCIENCE 2022; 13:1007895. [PMID: 36092430 PMCID: PMC9449495 DOI: 10.3389/fpls.2022.1007895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 08/08/2022] [Indexed: 06/15/2023]
Abstract
Proanthocyanidins (PAs) derived from grape berries determine the astringency and bitterness of red wines. The two leucoanthocyanidin reductases (VviLAR1 and VviLAR2) are crucial for PA accumulation in grapevine. Our previous studies show that the promoter of VviLAR1 contains multiple proposed bHLH transcription factor binding sites, but the corresponding bHLH family regulators remain unknown. Here we identified and functionally characterized VvibHLH93 as a new bHLH transcription factor in PA pathway. Yeast one-hybrid and electrophoretic mobility shift assays showed that VvibHLH93 bound the E/G-box in VviLAR1 promoter. And VvibHLH93 gene was mainly expressed in grape flowers, tendrils, stems and berries at PA active stages. Overexpression of VvibHLH93 suppressed PA accumulation in grape callus, which was linked to the repression of the transcript levels of two VviLARs. The gene expression analysis in transgenic grape callus and the dual-luciferase assay in tobacco leaves together revealed that VvibHLH93 targeted a broad set of structural genes and transcription factors in flavonoid pathway. This research enriches the regulatory mechanism of the two VviLAR genes, and provides new insights into regulating PA content in grape berries.
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Affiliation(s)
- Jing Cheng
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
- Jiangsu Agri-Animal Husbandry Vocational College, Taizhou, Jiangsu, China
| | - Ying Shi
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Jun Wang
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Changqing Duan
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
| | - Keji Yu
- Center for Viticulture and Enology, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, China
- Key Laboratory of Viticulture and Enology, Ministry of Agriculture and Rural Affairs, Beijing, China
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Wang E, Liu T, Sun X, Jing S, Zhou T, Liu T, Song B. Profiling of the Candidate Interacting Proteins of SELF-PRUNING 6A (SP6A) in Solanum tuberosum. Int J Mol Sci 2022; 23:ijms23169126. [PMID: 36012392 PMCID: PMC9408985 DOI: 10.3390/ijms23169126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 02/06/2023] Open
Abstract
SELF-PRUNING 6A (SP6A), a homolog of FLOWERING LOCUS T (FT), has been identified as tuberigen in potato. StSP6A is a mobile signal synthesized in leaves and transmitted to the stolon through phloem, and plays multiple roles in the growth and development of potato. However, the global StSP6A protein interaction network in potato remains poorly understood. In this study, BK-StSP6A was firstly used as the bait to investigate the StSP6A interaction network by screening the yeast two-hybrid (Y2H) library of potato, resulting in the selection of 200 independent positive clones and identification of 77 interacting proteins. Then, the interaction between StSP6A and its interactors was further confirmed by the Y2H and BiFC assays, and three interactors were selected for further expression analysis. Finally, the expression pattern of Flowering Promoting Factor 1.1 (StFPF1.1), No Flowering in Short Days 1 and 2 (StNFL1 and StNFL2) was studied. The three genes were highly expressed in flowers or flower buds. StFPF1.1 exhibited an expression pattern similar to that of StSP6A at the stolon swelling stages. StPHYF-silenced plants showed up-regulated expression of StFPF1.1 and StSP6A, while expression of StNFL1 and StNFL2 was down-regulated in the stolon. The identification of these interacting proteins lays a solid foundation for further functional studies of StSP6A.
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Affiliation(s)
- Enshuang Wang
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Tengfei Liu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiaomeng Sun
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Shenglin Jing
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Tingting Zhou
- State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural University, Tai’an 271018, China
| | - Tiantian Liu
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
| | - Botao Song
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture and Rural Affairs, Huazhong Agricultural University, Wuhan 430070, China
- Potato Engineering and Technology Research Center of Hubei Province, Huazhong Agricultural University, Wuhan 430070, China
- College of Horticulture and Forestry Science, Huazhong Agricultural University, Wuhan 430070, China
- Correspondence: ; Tel.: +86-027-8728-7381
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Zuo ZF, Sun HJ, Lee HY, Kang HG. Identification of bHLH genes through genome-wide association study and antisense expression of ZjbHLH076/ZjICE1 influence tolerance to low temperature and salinity in Zoysia japonica. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 313:111088. [PMID: 34763873 DOI: 10.1016/j.plantsci.2021.111088] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/07/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
Abiotic stress greatly affects plant growth and developmental processes, resulting in poor productivity. A variety of basic helix-loop-helix (bHLH) transcription factors (TFs) that play important roles in plant abiotic stress response pathways have been identified. However, bHLH proteins of Zoysia japonica, one of the warm-season turfgrasses, have not been widely studied. In this study, 141 bHLH genes (ZjbHLHs) were identified and classified into 22 subfamilies. The ZjbHLHs were mapped on 19 chromosomes except for Chr17 and one pair of the tandemly arrayed genes was identified on Chr06. Also, the co-linearity of ZjbHLHs was found to have been driven mostly by segmental duplication events. The subfamily IIIb genes of our present interest, possessed various stress responsive cis-elements in their promoters. ZjbHLH076/ZjICE1, a MYC-type bHLH TF in subfamily IIIb was analyzed by overexpression and its loss-of-function via overexpressing a short ZjbHLH076/ZjICE1 fragment in the antisense direction. The overexpression of ZjbHLH076/ZjICE1 enhanced the tolerance to cold and salinity stress in the transgenic Z. japonica plants. However, the anti-sense expression of ZjbHLH076/ZjICE1 showed sensitive to these abiotic stresses. These results suggest that ZjbHLH076/ZjICE1 would be a promising candidate for the molecular breeding program to improve the abiotic stress tolerance of Z. japonica.
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Affiliation(s)
- Zhi-Fang Zuo
- Department of Biotechnology, Jeju National University, Jeju, Republic of Korea; Subtropical Horticulture Research Institute, Jeju National University, Jeju, Republic of Korea
| | - Hyeon-Jin Sun
- Subtropical Horticulture Research Institute, Jeju National University, Jeju, Republic of Korea
| | - Hyo-Yeon Lee
- Department of Biotechnology, Jeju National University, Jeju, Republic of Korea; Subtropical Horticulture Research Institute, Jeju National University, Jeju, Republic of Korea.
| | - Hong-Gyu Kang
- Subtropical Horticulture Research Institute, Jeju National University, Jeju, Republic of Korea.
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Li T, Lei W, He R, Tang X, Han J, Zou L, Yin Y, Lin H, Zhang D. Brassinosteroids regulate root meristem development by mediating BIN2-UPB1 module in Arabidopsis. PLoS Genet 2020; 16:e1008883. [PMID: 32609718 PMCID: PMC7360063 DOI: 10.1371/journal.pgen.1008883] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 07/14/2020] [Accepted: 05/24/2020] [Indexed: 11/19/2022] Open
Abstract
Plant steroid hormones brassinosteroids (BRs) regulate plant growth and development at many levels. While negative regulatory factors that inhibit development and are counteracted by BRs exist in the root meristem, these factors have not been characterized. The functions of UPB1 transcription factor in BR-regulated root growth have not been established, although its role in regulating root are well documented. Here, we found that BIN2 interacts with and phosphorylates the UPB1 transcription factor consequently promoting UPB1 stability and transcriptional activity. Genetic analysis revealed that UPB1 deficiency could partially recover the short-root phenotype of BR-deficient mutants. Expression of a mutated UPB1S37AS41A protein lacking a conserved BIN2 phosphorylation sites can rescue shorter root phenotype of bin2-1 mutant. In addition, UPB1 was repressed by BES1 at the transcriptional level. The paclobutrazol-resistant protein family (PRE2/3) interacts with UPB1 and inhibits its transcriptional activity to promote root meristem development, and BIN2-mediated phosphorylation of UPB1 suppresses its interaction with PRE2/3, and subsequently impairing root meristem development. Taken together, our data elucidate a molecular mechanism by which BR promotes root growth via inhibiting BIN2-UPB1 module. Various physiological and genetic researches have provided ample evidence in support of the role of plant hormones in root development. Brasinosteroids (BR) play important roles in controlling root growth and development, but the mechanism of negatively regulating factors in this process is less well studied. Here, we found BIN2 kinase, a negative component in BR signaling, interacted with and phosphorylated UPB1 to stabilize and promote its binding ability. The upb1-1 mutant was hypersensitive phenotype, while UPB1-overexpression lines showed opposite effects on BR regulated root meristem development, and defect of UPB1 partially suppressed the short-root phenotype in BR-deficient mutants. Moreover, the paclobutrazol-resistant protein family (PRE2/3) interacted with UPB1 and inhibited its transcriptional activity, and this interaction was also inhibited by BIN2 phosphorylation, thus impairing root meristem development. Our findings provide significant insights into BR signaling through BIN2-UPB1 in regulating root meristem.
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Affiliation(s)
- Taotao Li
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Wei Lei
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Ruiyuan He
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Xiaoya Tang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Jifu Han
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
| | - Lijuan Zou
- Ecological Security and Protection Key Laboratory of Sichuan Province, Mianyang Normal University, Mianyang, Sichuan, P. R. China
| | - Yanhai Yin
- Department of Genetics, Development, and Cell Biology, Iowa State University, Ames, Iowa, United States of America
| | - Honghui Lin
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
- * E-mail: (HL); (DZ)
| | - Dawei Zhang
- Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, State Key Laboratory of Hydraulics and Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu, Sichuan, P. R. China
- * E-mail: (HL); (DZ)
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Zhang XY, Qiu JY, Hui QL, Xu YY, He YZ, Peng LZ, Fu XZ. Systematic analysis of the basic/helix-loop-helix (bHLH) transcription factor family in pummelo (Citrus grandis) and identification of the key members involved in the response to iron deficiency. BMC Genomics 2020; 21:233. [PMID: 32171259 PMCID: PMC7071715 DOI: 10.1186/s12864-020-6644-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 03/04/2020] [Indexed: 11/11/2022] Open
Abstract
Background Iron (Fe) deficiency is a common problem in citrus production. As the second largest superfamily of transcription factors (TFs), the basic/helix-loop-helix (bHLH) proteins have been shown to participate in the regulation of Fe homeostasis and a series of other biological and developmental processes in plants. However, this family of members in citrus and their functions in citrus Fe deficiency are still largely unknown. Results In this study, we identified a total of 128 CgbHLHs from pummelo (Citrus grandis) genome that were classified into 18 subfamilies by phylogenetic comparison with Arabidopsis thaliana bHLH proteins. All of these CgbHLHs were randomly distributed on nine known (125 genes) and one unknown (3 genes) chromosomes, and 12 and 47 of them were identified to be tandem and segmental duplicated genes, respectively. Sequence analysis showed detailed characteristics of their intron-exon structures, bHLH domain and conserved motifs. Gene ontology (GO) analysis suggested that most of CgbHLHs were annotated to the nucleus, DNA-binding transcription factor activity, response to abiotic stimulus, reproduction, post-embryonic development, flower development and photosynthesis. In addition, 27 CgbHLH proteins were predicted to have direct or indirect protein-protein interactions. Based on GO annotation, RNA sequencing data in public database and qRT-PCR results, several of CgbHLHs were identified as the key candidates that respond to iron deficiency. Conclusions In total, 128 CgbHLH proteins were identified from pummelo, and their detailed sequence and structure characteristics and putative functions were analyzed. This study provides comprehensive information for further functional elucidation of CgbHLH genes in citrus.
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Affiliation(s)
- Xiao-Yong Zhang
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Jie-Ya Qiu
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Qiu-Ling Hui
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Yuan-Yuan Xu
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Yi-Zhong He
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Liang-Zhi Peng
- Citrus Research Institute, Southwest University, Chongqing, 400712, China.,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China
| | - Xing-Zheng Fu
- Citrus Research Institute, Southwest University, Chongqing, 400712, China. .,Citrus Research Institute, National Citrus Engineering Research Center, Chinese Academy of Agricultural Sciences, Chongqing, 400712, China.
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Wen J, Wang L, Wang J, Zeng Y, Xu Y, Li S. The transcription factor OsbHLH138 regulates thermosensitive genic male sterility in rice via activation of TMS5. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2019; 132:1721-1732. [PMID: 30778635 DOI: 10.1007/s00122-019-03310-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Thermosensitive genic male sterile (TGMS) lines favored heterosis exploitation in two-line hybrid rice. TMS5, a member of RNase Z cleavages the UbL40 mRNAs, plays an important role in two-line hybrid rice. Here, we identified a new TGMS mutant 93-11s, which lost two amino acids in the first exon of TMS5 gene and caused thermosensitive genic male sterility in rice. The tms5-2 cannot process mRNAs of the ubiquitin fusion ribosomal protein L40 (UbL40) and hence cause the mRNAs accumulation in restrictive temperature. Further, we identified a nucleus-localized bHLH transcription factor OsbHLH138, which can form the basic helix-loop-helix structure and bind the core region of tms5-2 promoter sequences by bHLH domain, and activate expression of tms5-2 by the acidic amino acid-rich domain. These results indicate a novel mechanism for the tms5-2 regulating thermosensitive male sterility of rice. By altering expression of OsbHLH138, we can regulate the expression level of TMS5 and the accumulation of UbL40 mRNAs to command the male fertility in different temperatures. The identification of OsbHLH138 provides breeders a new choice for development of TGMS rice lines, which will favor the sustainable development of two-line hybrid rice.
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Affiliation(s)
- Jianyu Wen
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China
| | - Liuting Wang
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China
| | - Jie Wang
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China
| | - Yafei Zeng
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China
| | - Yanghong Xu
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China
| | - Shaoqing Li
- State Key Laboratory of Hybrid Rice, Key Laboratory for Research and Utilization of Heterosis in Indica Rice of Ministry of Agriculture, Engineering Research Center for Plant Biotechnology and Germplasm Utilization of Ministry of Education, College of Life Science, Wuhan University, Wuhan, 430072, China.
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