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Xu LL, Cui MQ, Xu C, Zhang MJ, Li GX, Xu JM, Wu XD, Mao CZ, Ding WN, Benhamed M, Ding ZJ, Zheng SJ. A clade of receptor-like cytoplasmic kinases and 14-3-3 proteins coordinate inositol hexaphosphate accumulation. Nat Commun 2024; 15:5107. [PMID: 38877001 PMCID: PMC11178898 DOI: 10.1038/s41467-024-49102-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 05/22/2024] [Indexed: 06/16/2024] Open
Abstract
Inositol hexaphosphate (InsP6) is the major storage form of phosphorus in seeds. Reducing seed InsP6 content is a breeding objective in agriculture, as InsP6 negatively impacts animal nutrition and the environment. Nevertheless, how InsP6 accumulation is regulated remains largely unknown. Here, we identify a clade of receptor-like cytoplasmic kinases (RLCKs), named Inositol Polyphosphate-related Cytoplasmic Kinases 1-6 (IPCK1-IPCK6), deeply involved in InsP6 accumulation. The InsP6 concentration is dramatically reduced in seeds of ipck quadruple (T-4m/C-4m) and quintuple (C-5m) mutants, accompanied with the obviously increase of phosphate (Pi) concentration. The plasma membrane-localized IPCKs recruit IPK1 involved in InsP6 synthesis, and facilitate its binding and activity via phosphorylation of GRF 14-3-3 proteins. IPCKs also recruit IPK2s and PI-PLCs required for InsP4/InsP5 and InsP3 biosynthesis respectively, to form a potential IPCK-GRF-PLC-IPK2-IPK1 complex. Our findings therefore uncover a regulatory mechanism of InsP6 accumulation governed by IPCKs, shedding light on the mechanisms of InsP biosynthesis in eukaryotes.
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Affiliation(s)
- Li Lin Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Natural Resources and Environment, South China Agricultural University, 5100642, Guangzhou, China
| | - Meng Qi Cui
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Natural Resources and Environment, South China Agricultural University, 5100642, Guangzhou, China
| | - Chen Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Natural Resources and Environment, South China Agricultural University, 5100642, Guangzhou, China
| | - Miao Jing Zhang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
| | - Gui Xin Li
- College of Agronomy and Biotechnology, Zhejiang University, 310058, Hangzhou, China
| | - Ji Ming Xu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
| | - Xiao Dan Wu
- Analysis Center of Agrobiology and Environmental Sciences, Zhejiang University, 310058, Hangzhou, China
| | - Chuan Zao Mao
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China
| | - Wo Na Ding
- Ningbo Key Laboratory of Agricultural Germplasm Resources Mining and Environmental Regulation, College of Science and Technology, Ningbo University, 315300, Ningbo, China
| | - Moussa Benhamed
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Institute of Plant Sciences Paris-Saclay (IPS2), 10 91405, Orsay, France
| | - Zhong Jie Ding
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China.
| | - Shao Jian Zheng
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, 310058, Hangzhou, China.
- Guangdong Laboratory for Lingnan Modern Agriculture, College of Natural Resources and Environment, South China Agricultural University, 5100642, Guangzhou, China.
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2
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Wang Q, Liu W, Leung CC, Tarté DA, Gendron JM. Plants distinguish different photoperiods to independently control seasonal flowering and growth. Science 2024; 383:eadg9196. [PMID: 38330117 PMCID: PMC11134419 DOI: 10.1126/science.adg9196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Accepted: 12/12/2023] [Indexed: 02/10/2024]
Abstract
Plants measure daylength (photoperiod) to regulate seasonal growth and flowering. Photoperiodic flowering has been well studied, but less is known about photoperiodic growth. By using a mutant with defects in photoperiodic growth, we identified a seasonal growth regulation pathway that functions in long days in parallel to the canonical long-day photoperiod flowering mechanism. This is achieved by using distinct mechanisms to detect different photoperiods: The flowering pathway measures photoperiod as the duration of light intensity, whereas the growth pathway measures photoperiod as the duration of photosynthetic activity (photosynthetic period). Plants can then independently control expression of genes required for flowering or growth. This demonstrates that seasonal flowering and growth are dissociable, allowing them to be coordinated independently across seasons.
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Affiliation(s)
- Qingqing Wang
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Wei Liu
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Chun Chung Leung
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Daniel A. Tarté
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Joshua M. Gendron
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
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3
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Jacob F, Hamid R, Ghorbanzadeh Z, Valsalan R, Ajinath LS, Mathew D. Genome-wide identification, characterization, and expression analysis of MIPS family genes in legume species. BMC Genomics 2024; 25:95. [PMID: 38262915 PMCID: PMC10804463 DOI: 10.1186/s12864-023-09937-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 12/23/2023] [Indexed: 01/25/2024] Open
Abstract
BACKGROUND Evolutionarily conserved in plants, the enzyme D-myo-inositol-3-phosphate synthase (MIPS; EC 5.5.1.4) regulates the initial, rate-limiting reaction in the phytic acid biosynthetic pathway. They are reported to be transcriptional regulators involved in various physiological functions in the plants, growth, and biotic/abiotic stress responses. Even though the genomes of most legumes are fully sequenced and available, an all-inclusive study of the MIPS family members in legumes is still ongoing. RESULTS We found 24 MIPS genes in ten legumes: Arachis hypogea, Cicer arietinum, Cajanus cajan, Glycine max, Lablab purpureus, Medicago truncatula, Pisum sativum, Phaseolus vulgaris, Trifolium pratense and Vigna unguiculata. The total number of MIPS genes found in each species ranged from two to three. The MIPS genes were classified into five clades based on their evolutionary relationships with Arabidopsis genes. The structural patterns of intron/exon and the protein motifs that were conserved in each gene were highly group-specific. In legumes, MIPS genes were inconsistently distributed across their genomes. A comparison of genomes and gene sequences showed that this family was subjected to purifying selection and the gene expansion in MIPS family in legumes was mainly caused by segmental duplication. Through quantitative PCR, expression patterns of MIPS in response to various abiotic stresses, in the vegetative tissues of various legumes were studied. Expression pattern shows that MIPS genes control the development and differentiation of various organs, and have significant responses to salinity and drought stress. CONCLUSION The MIPS genes in the genomes of legumes have been identified, characterized and their expression was analysed. The findings pave way for understanding their molecular functions and evolution, and lead to identify the putative MIPS genes associated with different cell and tissue development.
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Affiliation(s)
- Feba Jacob
- Centre for Plant Biotechnology and Molecular Biology, Kerala Agricultural University, Thrissur, India
| | - Rasmieh Hamid
- Department of Plant Breeding, Cotton Research Institute of Iran (CRII), Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran
| | - Zahra Ghorbanzadeh
- Department of Systems Biology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran
| | - Ravisankar Valsalan
- Centre for Plant Biotechnology and Molecular Biology, Kerala Agricultural University, Thrissur, India
| | - Lavale Shivaji Ajinath
- Centre for Plant Biotechnology and Molecular Biology, Kerala Agricultural University, Thrissur, India
| | - Deepu Mathew
- Centre for Plant Biotechnology and Molecular Biology, Kerala Agricultural University, Thrissur, India.
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4
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Wang Q, Liu W, Leung CC, Tartè DA, Gendron JM. Parallel mechanisms detect different photoperiods to independently control seasonal flowering and growth in plants. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.10.528016. [PMID: 36824862 PMCID: PMC9948978 DOI: 10.1101/2023.02.10.528016] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
For nearly 100 years, we have known that both growth and flowering in plants are seasonally regulated by the length of the day (photoperiod). Intense research focus and powerful genetic tools have propelled studies of photoperiodic flowering, but far less is known about photoperiodic growth, in part because tools were lacking. Here, using a new genetic tool that visually reports on photoperiodic growth, we identified a seasonal growth regulation pathway, from photoperiod detection to gene expression. Surprisingly, this pathway functions in long days but is distinct from the canonical long day photoperiod flowering mechanism. This is possible because the two mechanisms detect the photoperiod in different ways: flowering relies on measuring photoperiod by directly detecting duration of light intensity while the identified growth pathway relies on measuring photosynthetic period indirectly by detecting the duration of photosynthetic metabolite production. In turn, the two pathways then control expression of genes required for flowering or growth independently. Finally, our tools allow us to show that these two types of photoperiods, and their measurement systems, are dissociable. Our results constitute a new view of seasonal timekeeping in plants by showing that two parallel mechanisms measure different photoperiods to control plant growth and flowering, allowing these processes to be coordinated independently across seasons.
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Affiliation(s)
- Qingqing Wang
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Wei Liu
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Chun Chung Leung
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Daniel A Tartè
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
| | - Joshua M Gendron
- Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT 06511, USA
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5
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Zuo H, Si X, Li P, Li J, Chen Z, Li P, Chen C, Liu Z, Zhao J. Dynamic change of tea (Camellia sinensis) leaf cuticular wax in white tea processing for contribution to tea flavor formation. Food Res Int 2023; 163:112182. [PMID: 36596123 DOI: 10.1016/j.foodres.2022.112182] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 11/02/2022] [Accepted: 11/15/2022] [Indexed: 11/21/2022]
Abstract
Despite some studies on tea leaf cuticular wax, their component changes during dehydration and withering treatments in tea processing and suspected relation with tea flavor quality formation remain unknown. Here, we showed that tea leaf cuticular wax changed drastically in tea leaf development, dehydration, or withering treatment during tea processing, which affected tea flavor formation. Caffeine was found as a major component of leaf cuticular wax. Caffeine and inositol contents in leaf cuticular wax increased during dehydration and withering treatments. Comparisons showed that tea varieties with higher leaf cuticular wax loading produced more aroma than these with lower cuticular wax loading, supporting a positive correlation between tea leaf cuticular wax loading and degradation with white tea aroma formation. Dehydration or withering treatment of tea leaves also increased caffeine and inositol levels in leaf cuticular wax and triggered cuticular wax degradation into various molecules, that could be related to tea flavor formation. Thus, tea leaf cuticular waxes not only protect tea plants but also contribute to tea flavor formation. The study provides new insight into the dynamic changes of tea leaf cuticular waxes for tea plant protection and tea flavor quality formation in tea processing.
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Affiliation(s)
- Hao Zuo
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Xiongyuan Si
- Biotechnology Center, Anhui Agricultural University, Hefei 230036, China
| | - Ping Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Juan Li
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Zhihui Chen
- Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Penghui Li
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei 230036, China
| | - Changsong Chen
- Tea Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Zhonghua Liu
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha 410128, China
| | - Jian Zhao
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha 410128, China.
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6
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Zhou Y, Sun M, Sun P, Gao H, Yang H, Jing Y, Hussain MA, Saxena RK, Carther FI, Wang Q, Li H. Tonoplast inositol transporters: Roles in plant abiotic stress response and crosstalk with other signals. JOURNAL OF PLANT PHYSIOLOGY 2022; 271:153660. [PMID: 35240513 DOI: 10.1016/j.jplph.2022.153660] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 02/22/2022] [Accepted: 02/22/2022] [Indexed: 06/14/2023]
Abstract
Inositol transporters (INT) are thought to be the pivotal transporters for vital metabolites, in particular lipids, minerals, and sugars. These transporters play an important role in transitional metabolism and various signaling pathways in plants through regulating the transduction of messages from hormones, neurotransmitters, and immunologic and growth factors. Extensive studies have been conducted on animal INT, with promising outcomes. However, only few recent studies have highlighted the importance and complexity of INT genes in the regulation of plant physiology stages, including growth and tolerance to stress conditions. The present review summarizes the most recent findings concerning the role of INT or inositol genes in plant metabolism and the response mechanisms triggered by external stressors. Moreover, we highlight the emerging role of vacuoles and vacuolar INT in plant molecular transition and their related roles in plant growth and development. INTs are the essential mediators of inositol uptake and its intracellular broadcasting for various metabolic pathways where they play crucial roles. Additionally, we report evidence on Na+/inositol transporters, which until now have only been characterized in animals, as well as H+/inositol symporters and their kinetic functions and physiological role and suggest their roles and operating mode in plants. A more comprehensive understanding of the INT functioning system, in particular the coordinated movement of inositol and the relation between inositol generation and other important plant signaling pathways, would greatly advance the study of plant stress adaptation.
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Affiliation(s)
- Yonggang Zhou
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Monan Sun
- College of Plant Science, Jilin University, Changchun, 130062, China.
| | - Pengyu Sun
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Hongtao Gao
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - He Yang
- RDFZ Sanya School, Sanya, 572025, China.
| | - Yan Jing
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Muhammad Azhar Hussain
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Rachit K Saxena
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Hyderabad, 502324, India.
| | - Foka Idrice Carther
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
| | - Qingyu Wang
- College of Plant Science, Jilin University, Changchun, 130062, China.
| | - Haiyan Li
- Sanya Nanfan Research Institute of Hainan University, Hainan Yazhou Bay Seed Laboratory, Sanya, 572025, China; College of Tropical Crops, Hainan University, Haikou, 570288, China.
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DeMers LC, Raboy V, Li S, Saghai Maroof MA. Network Inference of Transcriptional Regulation in Germinating Low Phytic Acid Soybean Seeds. FRONTIERS IN PLANT SCIENCE 2021; 12:708286. [PMID: 34531883 PMCID: PMC8438133 DOI: 10.3389/fpls.2021.708286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 06/23/2021] [Indexed: 05/14/2023]
Abstract
The low phytic acid (lpa) trait in soybeans can be conferred by loss-of-function mutations in genes encoding myo-inositol phosphate synthase and two epistatically interacting genes encoding multidrug-resistance protein ATP-binding cassette (ABC) transporters. However, perturbations in phytic acid biosynthesis are associated with poor seed vigor. Since the benefits of the lpa trait, in terms of end-use quality and sustainability, far outweigh the negatives associated with poor seed performance, a fuller understanding of the molecular basis behind the negatives will assist crop breeders and engineers in producing variates with lpa and better germination rate. The gene regulatory network (GRN) for developing low and normal phytic acid soybean seeds was previously constructed, with genes modulating a variety of processes pertinent to phytic acid metabolism and seed viability being identified. In this study, a comparative time series analysis of low and normal phytic acid soybeans was carried out to investigate the transcriptional regulatory elements governing the transitional dynamics from dry seed to germinated seed. GRNs were reverse engineered from time series transcriptomic data of three distinct genotypic subsets composed of lpa soybean lines and their normal phytic acid sibling lines. Using a robust unsupervised network inference scheme, putative regulatory interactions were inferred for each subset of genotypes. These interactions were further validated by published regulatory interactions found in Arabidopsis thaliana and motif sequence analysis. Results indicate that lpa seeds have increased sensitivity to stress, which could be due to changes in phytic acid levels, disrupted inositol phosphate signaling, disrupted phosphate ion (Pi) homeostasis, and altered myo-inositol metabolism. Putative regulatory interactions were identified for the latter two processes. Changes in abscisic acid (ABA) signaling candidate transcription factors (TFs) putatively regulating genes in this process were identified as well. Analysis of the GRNs reveal altered regulation in processes that may be affecting the germination of lpa soybean seeds. Therefore, this work contributes to the ongoing effort to elucidate molecular mechanisms underlying altered seed viability, germination and field emergence of lpa crops, understanding of which is necessary in order to mitigate these problems.
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Affiliation(s)
- Lindsay C. DeMers
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Victor Raboy
- National Small Grains Germplasm Research Center, Agricultural Research Service (USDA), Aberdeen, ID, United States
| | - Song Li
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - M. A. Saghai Maroof
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
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8
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Jin H, Yu X, Yang Q, Fu X, Yuan F. Transcriptome analysis identifies differentially expressed genes in the progenies of a cross between two low phytic acid soybean mutants. Sci Rep 2021; 11:8740. [PMID: 33888781 PMCID: PMC8062490 DOI: 10.1038/s41598-021-88055-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Accepted: 04/08/2021] [Indexed: 12/13/2022] Open
Abstract
Phytic acid (PA) is a major antinutrient that cannot be digested by monogastric animals, but it can decrease the bioavailability of micronutrients (e.g., Zn and Fe). Lowering the PA content of crop seeds will lead to enhanced nutritional traits. Low-PA mutant crop lines carrying more than one mutated gene (lpa) have lower PA contents than mutants with a single lpa mutant gene. However, little is known about the link between PA pathway intermediates and downstream regulatory activities following the mutation of these genes in soybean. Consequently, we performed a comparative transcriptome analysis using an advanced generation recombinant inbred line with low PA levels [2mlpa (mips1/ipk1)] and a sibling line with homozygous non-mutant alleles and normal PA contents [2MWT (MIPS1/IPK1)]. An RNA sequencing analysis of five seed developmental stages revealed 7945 differentially expressed genes (DEGs) between the 2mlpa and 2MWT seeds. Moreover, 3316 DEGs were associated with 128 metabolic and signal transduction pathways and 4980 DEGs were annotated with 345 Gene Ontology terms related to biological processes. Genes associated with PA metabolism, photosynthesis, starch and sucrose metabolism, and defense mechanisms were among the DEGs in 2mlpa. Of these genes, 36 contributed to PA metabolism, including 22 genes possibly mediating the low-PA phenotype of 2mlpa. The expression of most of the genes associated with photosynthesis (81 of 117) was down-regulated in 2mlpa at the late seed developmental stage. In contrast, the expression of three genes involved in sucrose metabolism was up-regulated at the late seed developmental stage, which might explain the high sucrose content of 2mlpa soybeans. Furthermore, 604 genes related to defense mechanisms were differentially expressed between 2mlpa and 2MWT. In this study, we detected a low PA content as well as changes to multiple metabolites in the 2mlpa mutant. These results may help elucidate the regulation of metabolic events in 2mlpa. Many genes involved in PA metabolism may contribute to the substantial decrease in the PA content and the moderate accumulation of InsP3-InsP5 in the 2mlpa mutant. The other regulated genes related to photosynthesis, starch and sucrose metabolism, and defense mechanisms may provide additional insights into the nutritional and agronomic performance of 2mlpa seeds.
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Affiliation(s)
- Hangxia Jin
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Xiaomin Yu
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Qinghua Yang
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Xujun Fu
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China
| | - Fengjie Yuan
- Institute of Crop Science and Nuclear Technology Utilization, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang, China.
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9
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Pramitha JL, Rana S, Aggarwal PR, Ravikesavan R, Joel AJ, Muthamilarasan M. Diverse role of phytic acid in plants and approaches to develop low-phytate grains to enhance bioavailability of micronutrients. ADVANCES IN GENETICS 2020; 107:89-120. [PMID: 33641749 DOI: 10.1016/bs.adgen.2020.11.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Natural or synthetic compounds that interfere with the bioavailability of nutrients are called antinutrients. Phytic acid (PA) is one of the major antinutrients present in the grains and acts as a chelator of micronutrients. The presence of six reactive phosphate groups in PA hinders the absorption of micronutrients in the gut of non-ruminants. Consumption of PA-rich diet leads to deficiency of minerals such as iron and zinc among human population. On the contrary, PA is a natural antioxidant, and PA-derived molecules function in various signal transduction pathways. Therefore, optimal concentration of PA needs to be maintained in plants to avoid adverse pleiotropic effects, as well as to ensure micronutrient bioavailability in the diets. Given this, the chapter enumerates the structure, biosynthesis, and accumulation of PA in food grains followed by their roles in growth, development, and stress responses. Further, the chapter elaborates on the antinutritional properties of PA and explains the conventional breeding and transgene-based approaches deployed to develop low-PA varieties. Studies have shown that conventional breeding methods could develop low-PA lines; however, the pleiotropic effects of these methods viz. reduced yield, embryo abnormalities, and poor seed quality hinder the use of breeding strategies. Overexpression of phytase in the endosperm and RNAi-mediated silencing of genes involved in myo-inositol biosynthesis overcome these constraints. Next-generation genome editing approaches, including CRISPR-Cas9 enable the manipulation of more than one gene involved in PA biosynthesis pathway through multiplex editing, and scope exists to deploy such tools in developing varieties with optimal PA levels.
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Affiliation(s)
- J Lydia Pramitha
- Department of Millets, Center for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India
| | - Sumi Rana
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Pooja Rani Aggarwal
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India
| | - Rajasekaran Ravikesavan
- Department of Millets, Center for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, India.
| | - A John Joel
- Tamil Nadu Rice Research Institute, Tamil Nadu Agricultural University, Aduthurai, Tamil Nadu, India
| | - Mehanathan Muthamilarasan
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, Hyderabad, Telangana, India.
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10
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Role of myo-inositol during skotomorphogenesis in Arabidopsis. Sci Rep 2020; 10:17329. [PMID: 33060662 PMCID: PMC7567114 DOI: 10.1038/s41598-020-73677-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 09/21/2020] [Indexed: 11/08/2022] Open
Abstract
Myo-inositol is a ubiquitous metabolite of plants. It is synthesized by a highly conserved enzyme L-myo-inositol phosphate synthase (MIPS; EC 5.5.1.4). Myo-inositol is well characterized during abiotic stress tolerance but its role during growth and development is unclear. In this study, we demonstrate that the apical hook maintenance and hypocotyl growth depend on myo-inositol. We discovered the myo-inositol role during hook formation and its maintenance via ethylene pathway in Arabidopsis by supplementation assays and qPCR. Our results suggest an essential requirement of myo-inositol for mediating the ethylene response and its interaction with brassinosteroid to regulate the skotomorphogenesis. A model is proposed outlining how MIPS regulates apical hook formation and hypocotyl growth.
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11
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Hu L, Zhou K, Ren G, Yang S, Liu Y, Zhang Z, Li Y, Gong X, Ma F. Myo-inositol mediates reactive oxygen species-induced programmed cell death via salicylic acid-dependent and ethylene-dependent pathways in apple. HORTICULTURE RESEARCH 2020; 7:138. [PMID: 32922810 PMCID: PMC7459343 DOI: 10.1038/s41438-020-00357-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/08/2020] [Accepted: 06/16/2020] [Indexed: 05/08/2023]
Abstract
As a versatile compound, myo-inositol plays vital roles in plant biochemistry and physiology. We previously showed that exogenous application of myo-inositol had a positive role in salinity tolerance in Malus hupehensis Rehd. In this study, we used MdMIPS (the rate-limiting gene of myo-inositol biosynthesis) transgenic apple lines to gain new insights into the physiological role of myo-inositol in apple. Decreasing myo-inositol biosynthesis in apple lines by RNA silencing of MdMIPS1/2 led to extensive programmed cell death, which manifested as necrosis of both the leaves and roots and, ultimately, plant death. Necrosis was directly caused by the excessive accumulation of reactive oxygen species, which may be closely associated with the cell wall polysaccharide-mediated increase in salicylic acid and a compromised antioxidant system, and this process was enhanced by an increase in ethylene production. In addition, a high accumulation of sorbitol promoted necrosis. This synergetic interplay between salicylic acid and ethylene was further supported by the fact that increased myo-inositol accumulation significantly delayed leaf senescence in MdMIPS1-overexpressing apple lines. Taken together, our results indicated that apple myo-inositol regulates reactive oxygen species-induced programmed cell death through salicylic acid-dependent and ethylene-dependent pathways.
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Affiliation(s)
- Lingyu Hu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Kun Zhou
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Guijin Ren
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Shulin Yang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Yuan Liu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Zhijun Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Yangtiansu Li
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Xiaoqing Gong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, 712100 Yangling, Shaanxi China
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12
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Bruggeman Q, Piron-Prunier F, Tellier F, Faure JD, Latrasse D, Manza-Mianza D, Mazubert C, Citerne S, Boutet-Mercey S, Lugan R, Bergounioux C, Raynaud C, Benhamed M, Delarue M. Involvement of Arabidopsis BIG protein in cell death mediated by Myo-inositol homeostasis. Sci Rep 2020; 10:11268. [PMID: 32647331 PMCID: PMC7347573 DOI: 10.1038/s41598-020-68235-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 03/16/2020] [Indexed: 01/03/2023] Open
Abstract
Programmed cell death (PCD) is essential for several aspects of plant life. We previously identified the mips1 mutant of Arabidopsis thaliana, which is deficient for the enzyme catalysing myo-inositol synthesis, and that displays light-dependent formation of lesions on leaves due to Salicylic Acid (SA) over-accumulation. Rationale of this work was to identify novel regulators of plant PCD using a genetic approach. A screen for secondary mutations that abolish the mips1 PCD phenotype identified a mutation in the BIG gene, encoding a factor of unknown molecular function that was previously shown to play pleiotropic roles in plant development and defence. Physiological analyses showed that BIG is required for lesion formation in mips1 via SA-dependant signalling. big mutations partly rescued transcriptomic and metabolomics perturbations as stress-related phytohormones homeostasis. In addition, since loss of function of the ceramide synthase LOH2 was not able to abolish cell death induction in mips1, we show that PCD induction is not fully dependent of sphingolipid accumulation as previously suggested. Our results provide further insights into the role of the BIG protein in the control of MIPS1-dependent cell death and also into the impact of sphingolipid homeostasis in this pathway.
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Affiliation(s)
- Quentin Bruggeman
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Florence Piron-Prunier
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Frédérique Tellier
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - Jean-Denis Faure
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - David Latrasse
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Deborah Manza-Mianza
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Christelle Mazubert
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Sylvie Citerne
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - Stéphanie Boutet-Mercey
- Institut Jean-Pierre Bourgin, INRAE, AgroParisTech, Université Paris-Saclay, 78000, Versailles, France
| | - Raphael Lugan
- Institut de Biologie Moléculaire Des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 12 rue du Général Zimmer, 67084, Strasbourg Cedex, France
| | - Catherine Bergounioux
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Cécile Raynaud
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Moussa Benhamed
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France
| | - Marianne Delarue
- Université Paris-Saclay, CNRS, INRAE, Univ Evry, Paris Diderot, Sorbonne Paris-Cité, Institute of Plant Sciences Paris-Saclay (IPS2), 91405, Orsay, France.
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You R, Wang L, Shi C, Chen H, Zhang S, Hu M, Tao Y. Efficient production of myo-inositol in Escherichia coli through metabolic engineering. Microb Cell Fact 2020; 19:109. [PMID: 32448266 PMCID: PMC7247202 DOI: 10.1186/s12934-020-01366-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 05/15/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The biosynthesis of high value-added compounds using metabolically engineered strains has received wide attention in recent years. Myo-inositol (inositol), an important compound in the pharmaceutics, cosmetics and food industries, is usually produced from phytate via a harsh set of chemical reactions. Recombinant Escherichia coli strains have been constructed by metabolic engineering strategies to produce inositol, but with a low yield. The proper distribution of carbon flux between cell growth and inositol production is a major challenge for constructing an efficient inositol-synthesis pathway in bacteria. Construction of metabolically engineered E. coli strains with high stoichiometric yield of inositol is desirable. RESULTS In the present study, we designed an inositol-synthesis pathway from glucose with a theoretical stoichiometric yield of 1 mol inositol/mol glucose. Recombinant E. coli strains with high stoichiometric yield (> 0.7 mol inositol/mol glucose) were obtained. Inositol was successfully biosynthesized after introducing two crucial enzymes: inositol-3-phosphate synthase (IPS) from Trypanosoma brucei, and inositol monophosphatase (IMP) from E. coli. Based on starting strains E. coli BW25113 (wild-type) and SG104 (ΔptsG::glk, ΔgalR::zglf, ΔpoxB::acs), a series of engineered strains for inositol production was constructed by deleting the key genes pgi, pfkA and pykF. Plasmid-based expression systems for IPS and IMP were optimized, and expression of the gene zwf was regulated to enhance the stoichiometric yield of inositol. The highest stoichiometric yield (0.96 mol inositol/mol glucose) was achieved from recombinant strain R15 (SG104, Δpgi, Δpgm, and RBSL5-zwf). Strain R04 (SG104 and Δpgi) reached high-density in a 1-L fermenter when using glucose and glycerol as a mixed carbon source. In scaled-up fed-batch bioconversion in situ using strain R04, 0.82 mol inositol/mol glucose was produced within 23 h, corresponding to a titer of 106.3 g/L (590.5 mM) inositol. CONCLUSIONS The biosynthesis of inositol from glucose in recombinant E. coli was optimized by metabolic engineering strategies. The metabolically engineered E. coli strains represent a promising method for future inositol production. This study provides an essential reference to obtain a suitable distribution of carbon flux between glycolysis and inositol synthesis.
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Affiliation(s)
- Ran You
- School of Life Sciences, University of Science and Technology of China, Hefei, 230027, China.,Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Lei Wang
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Congrong Shi
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hao Chen
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shasha Zhang
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Meirong Hu
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Yong Tao
- Chinese Academy of Sciences Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China. .,College of Life Science, University of Chinese Academy of Sciences, Beijing, 100049, China.
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14
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Zhong S, Liu M, Wang Z, Huang Q, Hou S, Xu YC, Ge Z, Song Z, Huang J, Qiu X, Shi Y, Xiao J, Liu P, Guo YL, Dong J, Dresselhaus T, Gu H, Qu LJ. Cysteine-rich peptides promote interspecific genetic isolation in Arabidopsis. Science 2019; 364:364/6443/eaau9564. [PMID: 31147494 DOI: 10.1126/science.aau9564] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 01/14/2019] [Accepted: 04/25/2019] [Indexed: 12/21/2022]
Abstract
Reproductive isolation is a prerequisite for speciation. Failure of communication between female tissues of the pistil and paternal pollen tubes imposes hybridization barriers in flowering plants. Arabidopsis thaliana LURE1 (AtLURE1) peptides and their male receptor PRK6 aid attraction of the growing pollen tube to the ovule. Here, we report that the knockout of the entire AtLURE1 gene family did not affect fertility, indicating that AtLURE1-PRK6-mediated signaling is not required for successful fertilization within one Arabidopsis species. AtLURE1s instead function as pollen tube emergence accelerators that favor conspecific pollen over pollen from other species and thus promote reproductive isolation. We also identified maternal peptides XIUQIU1 to -4, which attract pollen tubes regardless of species. Cooperation between ovule attraction and pollen tube growth acceleration favors conspecific fertilization and promotes reproductive isolation.
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Affiliation(s)
- Sheng Zhong
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China.,The National Plant Gene Research Center (Beijing), Beijing 100101, People's Republic of China
| | - Meiling Liu
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Zhijuan Wang
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Qingpei Huang
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Saiying Hou
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Yong-Chao Xu
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Zengxiang Ge
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Zihan Song
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Jiaying Huang
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Xinyu Qiu
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Yihao Shi
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Junyu Xiao
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
| | - Pei Liu
- Department of Ecology, College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, People's Republic of China
| | - Ya-Long Guo
- State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
| | - Juan Dong
- The Waksman Institute of Microbiology, Rutgers, the State University of New Jersey, Piscataway, NJ 08854, USA
| | - Thomas Dresselhaus
- Cell Biology and Plant Biochemistry, Regensburg Center for Biochemistry, University of Regensburg, 93053 Regensburg, Germany
| | - Hongya Gu
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China.,The National Plant Gene Research Center (Beijing), Beijing 100101, People's Republic of China
| | - Li-Jia Qu
- State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences at the College of Life Sciences, Peking University, Beijing 100871, People's Republic of China. .,The National Plant Gene Research Center (Beijing), Beijing 100101, People's Republic of China
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15
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Hazra A, Dasgupta N, Sengupta C, Das S. MIPS: Functional dynamics in evolutionary pathways of plant kingdom. Genomics 2019; 111:1929-1945. [DOI: 10.1016/j.ygeno.2019.01.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/22/2018] [Accepted: 01/02/2019] [Indexed: 10/27/2022]
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16
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Ni Y, Li G, Ji X, Yang Y, Guo X, Sun Q. Identification of an inositol-3-phosphate synthase 1-B gene (AccIPS1-B) from Apis cerana cerana and its role in abiotic stress. Cell Stress Chaperones 2019; 24:1101-1113. [PMID: 31512154 PMCID: PMC6882988 DOI: 10.1007/s12192-019-01032-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Revised: 08/07/2019] [Accepted: 08/26/2019] [Indexed: 02/03/2023] Open
Abstract
Inositol phosphate synthase (IPS) is a rate-limiting enzyme in myo-inositol biosynthesis, which can regulate stress responses in plants and animals. However, there are few studies on the function of IPS in insects, especially in Apis cerana cerana. In this study, the inositol-3-phosphate synthase 1-B gene (AccIPS1-B) was isolated from Apis cerana cerana, and its connection to antioxidant defence was investigated. The open reading frame of AccIPS1-B was 1542 bp, encoding a 513 amino acid polypeptide. Quantitative real-time PCR analysis revealed that the expression level of AccIPS1-B was highest in pupae of Apis cerana cerana, and it was expressed at higher levels in the thorax than in other tissues tested. Moreover, the expression of AccIPS1-B was significantly upregulated by abiotic stresses. The recombinant AccIPS1-B also displayed significant tolerance to cumene hydroperoxide and HgCl2. In addition, knockdown of AccIPS1-B significantly suppressed the expression of most of the antioxidant genes and decreased the antioxidant enzymatic activities of SOD, POD, and GST. Taken together, these findings indicate that AccIPS1-B may be involved in the response to antioxidant defence and development in Apis cerana cerana.
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Affiliation(s)
- Yong Ni
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China
| | - Guilin Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China
| | - Xiaomin Ji
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China
| | - Yaqian Yang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China
| | - Xingqi Guo
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China.
| | - Qinghua Sun
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Taian, 271018, Shandong, People's Republic of China.
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Comparative proteomic analysis provides new insights into the specialization of shoots and stolons in bermudagrass (Cynodon dactylon L.). BMC Genomics 2019; 20:708. [PMID: 31510936 PMCID: PMC6740039 DOI: 10.1186/s12864-019-6077-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/04/2019] [Indexed: 12/26/2022] Open
Abstract
Background Bermudagrass (Cynodon dactylon L.) is an important turfgrass species with two types of stems, shoots and stolons. Despite their importance in determining the morphological variance and plasticity of bermudagrass, the intrinsic differences between stolons and shoots are poorly understood. Results In this study, we compared the proteomes of internode sections of shoots and stolons in the bermudagrass cultivar Yangjiang. The results indicated that 376 protein species were differentially accumulated in the two types of stems. Pathway enrichment analysis revealed that five and nine biochemical pathways were significantly enriched in stolons and shoots, respectively. Specifically, enzymes participating in starch synthesis all preferentially accumulated in stolons, whereas proteins involved in glycolysis and diverse transport processes showed relatively higher abundance in shoots. ADP-glucose pyrophosphorylase (AGPase) and pyruvate kinase (PK), which catalyze rate-limiting steps of starch synthesis and glycolysis, showed high expression levels and enzyme activity in stolons and shoots, respectively, in accordance with the different starch and soluble sugar contents of the two types of stems. Conclusions Our study revealed the differences between the shoots and stolons of bermudagrass at the proteome level. The results not only expand our understanding of the specialization of stolons and shoots but also provide clues for the breeding of bermudagrass and other turfgrasses with different plant architectures. Supplementary material Supplementary information accompanies this paper at 10.1186/s12864-019-6077-3.
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A Cotton ( Gossypium hirsutum) Myo-Inositol-1-Phosphate Synthase ( GhMIPS1D) Gene Promotes Root Cell Elongation in Arabidopsis. Int J Mol Sci 2019; 20:ijms20051224. [PMID: 30862084 PMCID: PMC6429088 DOI: 10.3390/ijms20051224] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 02/22/2019] [Accepted: 02/26/2019] [Indexed: 01/24/2023] Open
Abstract
Myo-inositol-1-phosphate synthase (MIPS, EC 5.5.1.4) plays important roles in plant growth and development, stress responses, and cellular signal transduction. MIPS genes were found preferably expressed during fiber cell initiation and early fast elongation in upland cotton (Gossypium hirsutum), however, current understanding of the function and regulatory mechanism of MIPS genes to involve in cotton fiber cell growth is limited. Here, by genome-wide analysis, we identified four GhMIPS genes anchoring onto four chromosomes in G. hirsutum and analyzed their phylogenetic relationship, evolutionary dynamics, gene structure and motif distribution, which indicates that MIPS genes are highly conserved from prokaryotes to green plants, with further exon-intron structure analysis showing more diverse in Brassicales plants. Of the four GhMIPS members, based on the significant accumulated expression of GhMIPS1D at the early stage of fiber fast elongating development, thereby, the GhMIPS1D was selected to investigate the function of participating in plant development and cell growth, with ectopic expression in the loss-of-function Arabidopsis mips1 mutants. The results showed that GhMIPS1D is a functional gene to fully compensate the abnormal phenotypes of the deformed cotyledon, dwarfed plants, increased inflorescence branches, and reduced primary root lengths in Arabidopsis mips1 mutants. Furthermore, shortened root cells were recovered and normal root cells were significantly promoted by ectopic expression of GhMIPS1D in Arabidopsis mips1 mutant and wild-type plants respectively. These results serve as a foundation for understanding the MIPS family genes in cotton, and suggest that GhMIPS1D may function as a positive regulator for plant cell elongation.
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Strobl SM, Kischka D, Heilmann I, Mouille G, Schneider S. The Tonoplastic Inositol Transporter INT1 From Arabidopsis thaliana Impacts Cell Elongation in a Sucrose-Dependent Way. FRONTIERS IN PLANT SCIENCE 2018; 9:1657. [PMID: 30505313 PMCID: PMC6250803 DOI: 10.3389/fpls.2018.01657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 10/25/2018] [Indexed: 05/29/2023]
Abstract
The tonoplastic inositol transporter INT1 is the only known transport protein in Arabidopsis that facilitates myo-inositol import from the vacuole into the cytoplasm. Impairment of the release of vacuolar inositol by knockout of INT1 results in a severe inhibition of cell elongation in roots as well as in etiolated hypocotyls. Importantly, a more strongly reduced cell elongation was observed when sucrose was supplied in the growth medium, and this sucrose-dependent effect can be complemented by the addition of exogenous myo-inositol. Comparing int1 mutants (defective in transport) with mutants defective in myo-inositol biosynthesis (mips1 mutants) revealed that the sucrose-induced inhibition in cell elongation does not just depend on inositol depletion. Secondary effects as observed for altered availability of inositol in biosynthesis mutants, as disturbed membrane turnover, alterations in PIN protein localization or alterations in inositol-derived signaling molecules could be ruled out to be responsible for impairing the cell elongation in int1 mutants. Although the molecular mechanism remains to be elucidated, our data implicate a crucial role of INT1-transported myo-inositol in regulating cell elongation in a sucrose-dependent manner and underline recent reports of regulatory roles for sucrose and other carbohydrate intermediates as metabolic semaphores.
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Affiliation(s)
- Sabrina Maria Strobl
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Dominik Kischka
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Ingo Heilmann
- Department of Cellular Biochemistry, Institute for Biochemistry and Biotechnology, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Grégory Mouille
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Université Paris Saclay, Versailles, France
| | - Sabine Schneider
- Molecular Plant Physiology, Department of Biology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
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20
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Zhang J, Yang N, Li Y, Zhu S, Zhang S, Sun Y, Zhang HX, Wang L, Su H. Overexpression of PeMIPS1 confers tolerance to salt and copper stresses by scavenging reactive oxygen species in transgenic poplar. TREE PHYSIOLOGY 2018; 38:1566-1577. [PMID: 29579299 DOI: 10.1093/treephys/tpy028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 02/23/2018] [Indexed: 06/08/2023]
Abstract
Myo-inositol is a vital compound in plants. As the key rate-limiting enzyme in myo-inositol biosynthesis, l-myo-inositol-1-phosphate synthase (MIPS) is regarded as a determinant of the myo-inositol content in plants. The up-regulation of MIPS genes can increase the myo-inositol content, thereby enhancing the plant's resistance to a variety of stresses. However, there are few reports on the roles of myo-inositol and the identification of MIPS in woody trees. In this study, a MIPS gene, named as PeMIPS1, was characterized from Populus euphratica Oliv. The heterologous expression of PeMIPS1 compensated for inositol production in the yeast inositol auxotrophic mutant ino1 and the phenotypic lesions of the atmips1-2 mutant, an Arabidopsis MIPS1 knock-out mutant. A subcellular location analysis showed that the PeMIPS1-GFP fusion was localized in the nucleus and cytoplasm, but not in the chloroplasts, indicating that PeMIPS1 represented the cytosolic form of MIPS in P. euphratica. Interestingly, PeMIPS1 was not only inducible by drought and high salinity, but also by CuSO4 treatment. The transgenic poplar lines overexpressing PeMIPS1 had greater plant heights, shoot biomasses and survival rates than the wild type during the salt- or copper-stress treatment, and this was accompanied by an increase in the myo-inositol content. The overexpression of PeMIPS1 resulted in the increased activities of antioxidant enzymes and the accumulation of ascorbate, a key nonenzymatic antioxidant in plant, which partly accounted for the enhanced reactive oxygen species-scavenging capacity and the lowered hydrogen peroxide and malondialdehyde levels in the transgenic poplar. To the best of our knowledge, this study is the first to report the roles of MIPS genes in the tolerance to copper stress.
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Affiliation(s)
- Jing Zhang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Nan Yang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Yuanyuan Li
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Shidong Zhu
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Shengnan Zhang
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Yadong Sun
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Hong-Xia Zhang
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
| | - Lei Wang
- College of Life Sciences, Ludong University, Yantai, Shandong, PR China
| | - Hongyan Su
- College of Agriculture, Ludong University, Yantai, Shandong, PR China
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21
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Fleet CM, Yen JY, Hill EA, Gillaspy GE. Co-suppression of AtMIPS demonstrates cooperation of MIPS1, MIPS2 and MIPS3 in maintaining myo-inositol synthesis. PLANT MOLECULAR BIOLOGY 2018; 97:253-263. [PMID: 29777485 DOI: 10.1007/s11103-018-0737-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2017] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
Co-suppressed MIPS2 transgenic lines allow bypass of the embryo lethal phenotype of the previously published triple knock-out and demonstrate the effects of MIPS on later stages of development. Regulation of inositol production is of interest broadly for its effects on plant growth and development. The enzyme L-myo-inositol 1-phosphate synthase (MIPS, also known as IPS) isomerizes D-glucose-6-P to D-inositol 3-P, and this is the rate-limiting step in inositol production. In Arabidopsis thaliana, the MIPS enzyme is encoded by three different genes, (AtMIPS1, AtMIPS2 and AtMIPS3), each of which has been shown to produce proteins with biochemically similar properties but differential expression patterns. Here, we report phenotypic and biochemical effects of MIPS co-suppression. We show that some plants engineered to overexpress MIPS2 in fact show reduced expression of AtMIPS1, AtMIPS2 and AtMIPS3, and show altered vegetative phenotype, reduced size and root length, and delayed flowering. Additionally, these plants show reduced inositol, increased glucose levels, and alteration of other metabolites. Our results suggest that the three AtMIPS genes work together to impact the overall synthesis of myo-inositol and overall inositol homeostasis.
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Affiliation(s)
- C M Fleet
- Biology Department, Emory & Henry College, Emory, VA, 24327, USA.
| | - J Y Yen
- Department of Biological Systems Engineering, Virginia Tech, Blacksburg, VA, 24061, USA
- Department of Plant Biology, Carnegie Institution for Science, 260 Panama Street, Stanford, CA, 93405, USA
| | - E A Hill
- Biology Department, Emory & Henry College, Emory, VA, 24327, USA
- Lincoln Memorial University College of Veterinary Medicine, Harrogate, TN, 37752, USA
| | - G E Gillaspy
- Department of Biochemistry, Virginia Tech, Blacksburg, VA, 24061, USA
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22
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Cominelli E, Confalonieri M, Carlessi M, Cortinovis G, Daminati MG, Porch TG, Losa A, Sparvoli F. Phytic acid transport in Phaseolus vulgaris: A new low phytic acid mutant in the PvMRP1 gene and study of the PvMRPs promoters in two different plant systems. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:1-12. [PMID: 29576062 DOI: 10.1016/j.plantsci.2018.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 02/02/2018] [Accepted: 02/05/2018] [Indexed: 05/24/2023]
Abstract
Phytic acid (InsP6) is the main storage form of phosphate in seeds. In the plant it plays an important role in response to environmental stress and hormonal changes. InsP6 is a strong chelator of cations, reducing the bioavailability of essential minerals in the diet. Only a common bean low phytic acid (lpa1) mutant, affected in the PvMRP1 gene, coding for a putative tonoplastic phytic acid transporter, was described so far. This mutant is devoid of negative pleiotropic effects normally characterising lpa mutants. With the aim of isolating new common bean lpa mutants, an ethyl methane sulfonate mutagenized population was screened, resulting in the identification of an additional lpa1 allele. Other putative lpa lines were also isolated. The PvMRP2 gene is probably able to complement the phenotype of mutants affected in the PvMRP1 gene in tissues other than the seed. Only the PvMRP1 gene is expressed at appreciable levels in cotyledons. Arabidopsis thaliana and Medicago truncatula transgenic plants harbouring 1.5 kb portions of the intergenic 5' sequences of both PvMRP genes, fused upstream of the GUS reporter, were generated. GUS activity in different organs suggests a refined, species-specific mechanisms of regulation of gene expression for these two PvMRP genes.
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Affiliation(s)
- Eleonora Cominelli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Massimo Confalonieri
- CREA Research Centre for Animal Production and Aquaculture (CREA-ZA), Viale Piacenza 29, 26900, Lodi, Italy.
| | - Martina Carlessi
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; Present address: Plantlab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Via G. Guidiccioni, 8-10, 56010 Ghezzano (Pisa), Italy.
| | - Gaia Cortinovis
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Maria Gloria Daminati
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
| | - Timothy G Porch
- USDA-ARS, Tropical Agriculture Research Station, 2200 P.A. Campos Avenue, Suite 201, Mayaguez, 00680, Puerto Rico.
| | - Alessia Losa
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy; CREA Research Centre for Genomics and Bioinformatics (CREA-GB), Via Paullese 28, 26836 Montanaso Lombardo, Lodi, Italy.
| | - Francesca Sparvoli
- CNR - National Research Council, Institute of Agricultural Biology and Biotechnology (IBBA, CNR), Via E. Bassini, 15, 20133, Milan, Italy.
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Egea I, Albaladejo I, Meco V, Morales B, Sevilla A, Bolarin MC, Flores FB. The drought-tolerant Solanum pennellii regulates leaf water loss and induces genes involved in amino acid and ethylene/jasmonate metabolism under dehydration. Sci Rep 2018; 8:2791. [PMID: 29434236 PMCID: PMC5809557 DOI: 10.1038/s41598-018-21187-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 01/31/2018] [Indexed: 12/29/2022] Open
Abstract
Breeding for drought-tolerant crops is a pressing issue due to the increasing frequency and duration of droughts caused by climate change. Although important sources of variation for drought tolerance exist in wild relatives, the mechanisms and the key genes controlling tolerance in tomato are little known. The aim of this study is to determine the drought response of the tomato wild relative Solanum pennellii (Sp) compared with the cultivated tomato Solanum lycopersicum (Sl). The paper investigates the physiological and molecular responses in leaves of Sp and Sl plants without stress and moderate drought stress. Significant physiological differences between species were found, with Sp leaves showing greater ability to avoid water loss and oxidative damage. Leaf transcriptomic analysis carried out when leaves did not as yet show visual dehydration symptoms revealed important constitutive expression differences between Sp and Sl species. Genes linked to different physiological and metabolic processes were induced by drought in Sp, especially those involved in N assimilation, GOGAT/GS cycle and GABA-shunt. Up-regulation in Sp of genes linked to JA/ET biosynthesis and signaling pathways was also observed. In sum, genes involved in the amino acid metabolism together with genes linked to ET/JA seem to be key actors in the drought tolerance of the wild tomato species.
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Affiliation(s)
- Isabel Egea
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain
| | - Irene Albaladejo
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain
| | - Victoriano Meco
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain.,Department of Molecular Biology and Biochemistry, Instituto de Hortofruticultura Subtropical y Mediterránea, University of Malaga-CSIC, 29071, Malaga, Spain
| | - Belén Morales
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain
| | - Angel Sevilla
- Inbionova Biotech S.L., Edif. CEEIM.University of Murcia, Campus de Espinardo, 30100, Espinardo-Murcia, Spain
| | - Maria C Bolarin
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain
| | - Francisco B Flores
- Department of stress biology and plant pathology, CEBAS-CSIC, P.O. Box 164, 30100, Espinardo-Murcia, Spain.
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24
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Ma L, Li G. FAR1-RELATED SEQUENCE (FRS) and FRS-RELATED FACTOR (FRF) Family Proteins in Arabidopsis Growth and Development. FRONTIERS IN PLANT SCIENCE 2018; 9:692. [PMID: 29930561 PMCID: PMC6000157 DOI: 10.3389/fpls.2018.00692] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 05/07/2018] [Indexed: 05/18/2023]
Abstract
Transposable elements make important contributions to adaptation and evolution of their host genomes. The well-characterized transposase-derived transcription factor FAR-RED ELONGATED HYPOCOTYLS3 (FHY3) and its homologue FAR-RED IMPAIRED RESPONSE1 (FAR1) have crucial functions in plant growth and development. In addition, FHY3 and FAR1 are the founding members of the FRS (FAR1-RELATED SEQUENCE) and FRF (FRS-RELATED FACTOR) families, which are conserved among land plants. Although the coding sequences of many putative FRS and FRF orthologs have been found in various clades of angiosperms, their physiological functions remain elusive. Here, we summarize recent progress toward characterizing the molecular mechanisms of FHY3 and FAR1, as well as other FRS-FRF family proteins, examining their roles in regulating plant growth and development. This review also suggests future directions for further functional characterization of other FRS-FRF family proteins in plants.
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Affiliation(s)
- Lin Ma
- School of Biological Science and Technology, University of Jinan, Jinan, China
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai’an, China
- *Correspondence: Gang Li,
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25
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Proteomics reveals key proteins participating in growth difference between fall dormant and non-dormant alfalfa in terminal buds. J Proteomics 2017; 173:126-138. [PMID: 29229487 DOI: 10.1016/j.jprot.2017.11.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 11/18/2017] [Accepted: 11/30/2017] [Indexed: 12/14/2022]
Abstract
To explore the molecular mechanism of growth differences between fall dormant (FD) and non-FD alfalfa, we conducted iTRAQ-based quantitative proteomics on terminal buds of Maverick (FD) and Cuf101 (non-FD) cultivars, identified differential abundance protein species (DAPS) and verified expression profiling of certain corresponding mRNA by qRT-PCR. A total of 3872 protein species were annotated. Of the 90 DAPS, 56 and 34 were respectively up- and down-accumulated in Maverick, compared to Cuf101. They were grouped into 35 functional categories and enriched in seven pathways. Of which, auxin polar transport was up-regulated, while phenylpropanoid biosynthesis, pyruvate metabolism and transportation, vitamin B1 synthesis process and flavonoid biosynthesis were down-regulated in Maverick, comparing with Cuf101. In Maverick, mRNA abundances of l-asparaginase, chalcone and stilbene synthase family protein, cinnamyl alcohol dehydrogenase-like protein, thiazole biosynthetic enzyme, pyruvate dehydrogenase E1 beta subunit, and aldo/keto reductase family oxidoreductase were significantly lower at FD than at other stages, and lower than in Cuf101. We also observed opposite mRNA profiles of thiazole biosynthetic enzyme, chalcone and stilbene synthase family protein, pyruvate dehydrogenase E1 beta subunit in both cultivars from summer to autumn. Our results suggest that these DAPS could play important roles in growth difference between FD and non-FD alfalfa. BIOLOGICAL SIGNIFICANCE Up to now, as far as we know, currently the proteins related with the growth differences between FD and non-FD alfalfa cultivars in autumn have not yet been identified in terminal buds. This study identified the protein species expressed in alfalfa terminal buds, selected differentially abundant protein species in terminal buds between Maverick (FD) and Cuf101 (non-FD) cultivars in autumn and identified the important protein species participated in the growth differences. This study lays a foundation for further investigation of the molecular mechanism of the growth differences between FD and non-FD alfalfa and the cultivation of advanced alfalfa cultivars.
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26
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Redekar N, Pilot G, Raboy V, Li S, Saghai Maroof MA. Inference of Transcription Regulatory Network in Low Phytic Acid Soybean Seeds. FRONTIERS IN PLANT SCIENCE 2017; 8:2029. [PMID: 29250090 PMCID: PMC5714895 DOI: 10.3389/fpls.2017.02029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 11/14/2017] [Indexed: 05/26/2023]
Abstract
A dominant loss of function mutation in myo-inositol phosphate synthase (MIPS) gene and recessive loss of function mutations in two multidrug resistant protein type-ABC transporter genes not only reduce the seed phytic acid levels in soybean, but also affect the pathways associated with seed development, ultimately resulting in low emergence. To understand the regulatory mechanisms and identify key genes that intervene in the seed development process in low phytic acid crops, we performed computational inference of gene regulatory networks in low and normal phytic acid soybeans using a time course transcriptomic data and multiple network inference algorithms. We identified a set of putative candidate transcription factors and their regulatory interactions with genes that have functions in myo-inositol biosynthesis, auxin-ABA signaling, and seed dormancy. We evaluated the performance of our unsupervised network inference method by comparing the predicted regulatory network with published regulatory interactions in Arabidopsis. Some contrasting regulatory interactions were observed in low phytic acid mutants compared to non-mutant lines. These findings provide important hypotheses on expression regulation of myo-inositol metabolism and phytohormone signaling in developing low phytic acid soybeans. The computational pipeline used for unsupervised network learning in this study is provided as open source software and is freely available at https://lilabatvt.github.io/LPANetwork/.
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Affiliation(s)
- Neelam Redekar
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - Guillaume Pilot
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA, United States
| | - Victor Raboy
- National Small Grains Germplasm Research Center, Agricultural Research Service (USDA), Aberdeen, ID, United States
| | - Song Li
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | - M. A. Saghai Maroof
- Department of Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
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27
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Iqbal A, Wang T, Wu G, Tang W, Zhu C, Wang D, Li Y, Wang H. Physiological and transcriptome analysis of heteromorphic leaves and hydrophilic roots in response to soil drying in desert Populus euphratica. Sci Rep 2017; 7:12188. [PMID: 28939837 PMCID: PMC5610244 DOI: 10.1038/s41598-017-12091-2] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 09/04/2017] [Indexed: 01/08/2023] Open
Abstract
Populus euphratica Olivier, which has been considered as a tree model for the study of higher plant response to abiotic stresses, survive in the desert ecosystem characterized by extreme drought stress. To survive in the harsh environmental condition the plant species have developed some plasticity such as the development of heteromorphic leaves and well-developed roots system. We investigated the physiological and molecular mechanisms enabling this species to cope with severe stress caused by drought. The heterophylly, evolved from linear to toothed-ovate shape, showed the significant difference in cuticle thickness, stomata densities, and sizes. Physiological parameters, SOD, POD, PPO, CAT activity, free proline, soluble protein and MDA contents fluctuated in response to soil drying. Gene expression profile of roots monitored at control and 4 moisture gradients regimes showed the up-regulation of 124, 130, 126 and 162 and down-regulation of 138, 251, 314, 168 DEGs, respectively. Xyloglucan endotransglucosylase/ hydrolase gene (XET) up-regulated at different moisture gradients, was cloned and expressed in tobacco. The XET promoter sequence harbors the drought signaling responsive cis-elements. The promoter expression activity varies in different organs. Over-expression and knocked down transgenic tobacco plant analysis confirmed the role of XET gene in roots growth and drought resistance.
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Affiliation(s)
- Arshad Iqbal
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Tianxiang Wang
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Guodong Wu
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Wensi Tang
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Chen Zhu
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Dapeng Wang
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China
| | - Yi Li
- Department of Plant Science, University of Connecticut, Storrs, CT, 06269, USA
| | - Huafang Wang
- College of Biological Sciences and Biotechnology, National Engineering Laboratory for Tree Breeding, Beijing Forestry University, Beijing, 100083, China.
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28
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Abstract
Given the highly predictable nature of their development, Arabidopsis embryos have been used as a model for studies of morphogenesis in plants. However, early stage plant embryos are small and contain few cells, making them difficult to observe and analyze. A method is described here for characterizing pattern formation in plant embryos under a microscope using the model organism Arabidopsis. Following the clearance of fresh ovules using Hoyer's solution, the cell number in and morphology of embryos could be observed, and their developmental stage could be determined by differential interference contrast microscopy using a 100X oil immersion lens. In addition, the expression of specific marker proteins tagged with Green Fluorescent Protein (GFP) was monitored to annotate cell identity specification during embryo patterning by confocal laser scanning microscopy. Thus, this method can be used to observe pattern formation in wild-type plant embryos at the cellular and molecular levels, and to characterize the role of specific genes in embryo patterning by comparing pattern formation in embryos from wild-type plants and embryo-lethal mutants. Therefore, the method can be used to characterize embryogenesis in Arabidopsis.
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Affiliation(s)
- Jinlin Feng
- College of Life Sciences, Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, Capital Normal University; College of Life Science, Shanxi Normal University
| | - Ligeng Ma
- College of Life Sciences, Key Laboratory of Plant Gene Resources and Biotechnology for Carbon Reduction and Environmental Improvement, Capital Normal University;
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29
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Zhang RX, Qin LJ, Zhao DG. Overexpression of the OsIMP Gene Increases the Accumulation of Inositol and Confers Enhanced Cold Tolerance in Tobacco through Modulation of the Antioxidant Enzymes' Activities. Genes (Basel) 2017; 8:E179. [PMID: 28726715 PMCID: PMC5541312 DOI: 10.3390/genes8070179] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 06/16/2017] [Accepted: 07/04/2017] [Indexed: 01/07/2023] Open
Abstract
Inositol is a cyclic polyol that is involved in various physiological processes, including signal transduction and stress adaptation in plants. l-myo-inositol monophosphatase (IMPase) is one of the metal-dependent phosphatase family members and catalyzes the last reaction step of biosynthesis of inositol. Although increased IMPase activity induced by abiotic stress has been reported in chickpea plants, the role and regulation of the IMP gene in rice (Oryza sativa L.) remains poorly understood. In the present work, we obtained a full-length cDNA sequence coding IMPase in the cold tolerant rice landraces in Gaogonggui, which is named as OsIMP. Multiple alignment results have displayed that this sequence has characteristic signature motifs and conserved enzyme active sites of the phosphatase super family. Phylogenetic analysis showed that IMPase is most closely related to that of the wild rice Oryza brachyantha, while transcript analysis revealed that the expression of the OsIMP is significantly induced by cold stress and exogenous abscisic acid (ABA) treatment. Meanwhile, we cloned the 5' flanking promoter sequence of the OsIMP gene and identified several important cis-acting elements, such as LTR (low-temperature responsiveness), TCA-element (salicylic acid responsiveness), ABRE-element (abscisic acid responsiveness), GARE-motif (gibberellin responsive), MBS (MYB Binding Site) and other cis-acting elements related to defense and stress responsiveness. To further investigate the potential function of the OsIMP gene, we generated transgenic tobacco plants overexpressing the OsIMP gene and the cold tolerance test indicated that these transgenic tobacco plants exhibit improved cold tolerance. Furthermore, transgenic tobacco plants have a lower level of hydrogen peroxide (H₂O₂) and malondialdehyde (MDA), and a higher content of total chlorophyll as well as increased antioxidant enzyme activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD), when compared to wild type (WT) tobacco plants under normal and cold stress conditions.
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Affiliation(s)
- Rong-Xiang Zhang
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
- College of Chemistry and Life Science, Guizhou Education University, Guiyang 550018, China.
| | - Li-Jun Qin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
| | - De-Gang Zhao
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Plant Resources Conservation and Germplasm Innovation in Mountainous Region, Ministry of Education, Institute of Agro-Bioengineering and College of Life Sciences, Guizhou University, Guiyang 550025, China.
- Guizhou Academy of Agricultural Sciences, Guiyang 550025, China.
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30
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Hu W, Zhang H, Chen H, Tang M. Arbuscular mycorrhizas influence Lycium barbarum tolerance of water stress in a hot environment. MYCORRHIZA 2017; 27:451-463. [PMID: 28185001 DOI: 10.1007/s00572-017-0765-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 01/27/2017] [Indexed: 05/08/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi can assist their hosts to cope with water stress and other abiotic stresses in different ways. In order to test whether AM plants have a greater capacity than control plants to cope with water stress, we investigated the water status and photosynthetic capacity of Lycium barbarum colonized or not by the AM fungus Rhizophagus irregularis under three water conditions during a hot summer. Sugar levels and transcriptional responses of both plant and AM fungus aquaporin genes in roots were analyzed. Compared with control plants, AM plants increased transpiration rate and stomatal conductance but decreased leaf relative water content under moderate water stress. Severe water stress, however, did not inhibit the quantum yield of PSII photochemistry in AM plants versus control plants. AM plants had higher expression levels of plasma membrane intrinsic proteins or tonoplast intrinsic proteins and Rir-AQP2 and lower leaf temperature than control plants under dry-hot stress. Additionally, AM plant sugar levels under normal water conditions were similar to those of control plants under moderate water stress, but sugar levels of AM plants especially increased with severe water stress. When these aspects of performance of AM and control plants under different water conditions are compared overall, AM plants displayed an obvious superiority over control plants at coping with moderate water stress in the hot environment; AM plants maintained normal photochemical processes under severe water stress, while sugar levels were affected strongly.
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Affiliation(s)
- Wentao Hu
- College of Life Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Haoqiang Zhang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Hui Chen
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China
| | - Ming Tang
- College of Forestry, Northwest A&F University, Yangling, Shaanxi, 712100, People's Republic of China.
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31
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Latrasse D, Benhamed M, Bergounioux C, Raynaud C, Delarue M. Plant programmed cell death from a chromatin point of view. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:5887-5900. [PMID: 27639093 DOI: 10.1093/jxb/erw329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Programmed cell death (PCD) is a ubiquitous genetically regulated process consisting of the activation of finely controlled signalling pathways that lead to cellular suicide. PCD can be part of a developmental programme (dPCD) or be triggered by environmental conditions (ePCD). In plant cells, as in animal cells, extensive chromatin condensation and degradation of the nuclear DNA are among the most conspicuous features of cells undergoing PCD. Changes in chromatin condensation could either reflect the structural changes required for internucleosomal fragmentation of nuclear DNA or relate to large-scale chromatin rearrangements associated with a major transcriptional switch occurring during cell death. The aim of this review is to give an update on plant PCD processes from a chromatin point of view. The first part will be dedicated to chromatin conformational changes associated with cell death observed in various developmental and physiological conditions, whereas the second part will be devoted to histone dynamics and DNA modifications associated with critical changes in genome expression during the cell death process.
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Affiliation(s)
- D Latrasse
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - M Benhamed
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - C Bergounioux
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - C Raynaud
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
| | - M Delarue
- Institute of Plant Sciences Paris-Saclay IPS2, CNRS, INRA, Université Paris-Sud, Université Evry, Université Paris-Saclay, Batiment 630, 91405 Orsay, France
- Institute of Plant Sciences Paris-Saclay IPS2, Paris Diderot, Sorbonne Paris-Cité, Bâtiment 630, 91405 Orsay, France
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Constitutive Overexpression of Myo-inositol-1-Phosphate Synthase Gene (GsMIPS2) from Glycine soja Confers Enhanced Salt Tolerance at Various Growth Stages in Arabidopsis. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1006-8104(16)30045-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Ma L, Tian T, Lin R, Deng XW, Wang H, Li G. Arabidopsis FHY3 and FAR1 Regulate Light-Induced myo-Inositol Biosynthesis and Oxidative Stress Responses by Transcriptional Activation of MIPS1. MOLECULAR PLANT 2016; 9:541-57. [PMID: 26714049 DOI: 10.1016/j.molp.2015.12.013] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 11/07/2015] [Accepted: 12/14/2015] [Indexed: 05/25/2023]
Abstract
myo-Inositol-1-phosphate synthase (MIPS) catalyzes the limiting step of inositol biosynthesis and has crucial roles in plant growth and development. In response to stress, the transcription of MIPS1 is induced and the biosynthesis of inositol or inositol derivatives is promoted by unknown mechanisms. Here, we found that the light signaling protein FAR-RED ELONGATED HYPOCOTYL3 (FHY3) and its homolog FAR-RED IMPAIRED RESPONSE1 (FAR1) regulate light-induced inositol biosynthesis and oxidative stress responses by activating the transcription of MIPS1. Disruption of FHY3 and FAR1 caused light-induced cell death after dark-light transition, precocious leaf senescence, and increased sensitivity to oxidative stress. Reduction of salicylic acid (SA) accumulation by overexpression of SALICYLIC ACID 3-HYDROXYLASE largely suppressed the cell death phenotype of fhy3 far1 mutant plants, suggesting that FHY3- and FAR1-mediated cell death is dependent on SA. Furthermore, comparative analysis of chromatin immunoprecipitation sequencing and microarray results revealed that FHY3 and FAR1 directly target both MIPS1 and MIPS2. The fhy3 far1 mutant plants showed severely decreased MIPS1/2 transcript levels and reduced inositol levels. Conversely, constitutive expression of MIPS1 partially rescued the inositol contents, caused reduced transcript levels of SA-biosynthesis genes, and prevented oxidative stress in fhy3 far1. Taken together, our results indicate that the light signaling proteins FHY3 and FAR1 directly bind the promoter of MIPS1 to activate its expression and thereby promote inositol biosynthesis to prevent light-induced oxidative stress and SA-dependent cell death.
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Affiliation(s)
- Lin Ma
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Tian Tian
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China
| | - Rongcheng Lin
- Key Laboratory of Photobiology, Institute of Botany, Chinese Academy of Science, Beijing 100093, China
| | - Xing-Wang Deng
- National Laboratory of Protein and Plant Gene Research, Peking-Yale Joint Center for Plant Molecular Genetics and Agro-Biotechnology, Peking-Tsinghua Center for Life Sciences, College of Life Sciences, Peking University, Beijing 100871, China
| | - Haiyang Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Gang Li
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, Tai'an 271018, China.
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Su J, Fan S, Li L, Wei H, Wang C, Wang H, Song M, Zhang C, Gu L, Zhao S, Mao G, Wang C, Pang C, Yu S. Detection of Favorable QTL Alleles and Candidate Genes for Lint Percentage by GWAS in Chinese Upland Cotton. FRONTIERS IN PLANT SCIENCE 2016; 7:1576. [PMID: 27818672 PMCID: PMC5073211 DOI: 10.3389/fpls.2016.01576] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Accepted: 10/06/2016] [Indexed: 05/18/2023]
Abstract
Improving cotton yield is a major breeding goal for Chinese upland cotton. Lint percentage is an important yield component and a critical economic index for cotton cultivars, and raising the lint percentage has a close relationship to improving cotton lint yield. To investigate the genetic architecture of lint percentage, a diversity panel consisting of 355 upland cotton accessions was grown, and the lint percentage was measured in four different environments. Genotyping was performed with specific-locus amplified fragment sequencing (SLAF-seq). Twelve single-nucleotide polymorphisms (SNPs) associated with lint percentage were detected via a genome-wide association study (GWAS), in which five SNP loci distributed on chromosomes At3 (A02) and At4 (A08) and contained two major-effect QTLs, which were detected in the best linear unbiased predictions (BLUPs) and in more than three environments simultaneously. Furthermore, favorable haplotypes (FHs) of two major-effect QTLs and 47 putative candidate genes in the two linkage disequilibrium (LD) blocks of these associated loci were identified. The expression levels of these putative candidate genes were estimated using RNA-seq data from ten upland cotton tissues. We found that Gh_A02G1268 was very highly expressed during the early fiber development stage, whereas the gene was poorly expressed in the seed. These results implied that Gh_A02G1268 may determine the lint percentage by regulating seed and fiber development. The favorable QTL alleles and candidate genes for lint percentage identified in this study will have high potential for improving lint yield in future Chinese cotton breeding programs.
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Affiliation(s)
- Junji Su
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
- Department of Plant Sciences, College of Agronomy, Northwest A&F UniversityYangling, China
| | - Shuli Fan
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Libei Li
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Hengling Wei
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Caixiang Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Hantao Wang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Meizhen Song
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Chi Zhang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Lijiao Gu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Shuqi Zhao
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Guangzhi Mao
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
| | - Chengshe Wang
- Department of Plant Sciences, College of Agronomy, Northwest A&F UniversityYangling, China
| | - Chaoyou Pang
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
- *Correspondence: Chaoyou Pang
| | - Shuxun Yu
- State Key Laboratory of Cotton Biology, Institute of Cotton Research of CAASAnyang, China
- Department of Plant Sciences, College of Agronomy, Northwest A&F UniversityYangling, China
- Shuxun Yu
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Duan GL, Hu Y, Schneider S, McDermott J, Chen J, Sauer N, Rosen BP, Daus B, Liu Z, Zhu YG. Inositol transporters AtINT2 and AtINT4 regulate arsenic accumulation in Arabidopsis seeds. NATURE PLANTS 2016; 2:15202. [PMID: 27004129 PMCID: PMC4758254 DOI: 10.1038/nplants.2015.202] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Accepted: 11/16/2015] [Indexed: 05/02/2023]
Abstract
Arsenic contamination of groundwater and soils threatens the health of tens of millions of people worldwide. Understanding the way in which arsenic is taken up by crops such as rice, which serve as a significant source of arsenic in the human diet, is therefore important. Membrane transport proteins that catalyse arsenic uptake by roots, and translocation through the xylem to shoots, have been characterized in a number of plants, including rice. The transporters responsible for loading arsenic from the xylem into the phloem and on into the seeds, however, are yet to be identified. Here, we show that transporters responsible for inositol uptake in the phloem in Arabidopsis also transport arsenic. Transformation of Saccharomyces cerevisiae with AtINT2 or AtINT4 led to increased arsenic accumulation and increased sensitivity to arsenite. Expression of AtINT2 in Xenopus laevis oocytes also induced arsenite import. Disruption of AtINT2 or AtINT4 in Arabidopsis thaliana led to a reduction in phloem, silique and seed arsenic concentrations in plants fed with arsenite through the roots, relative to wild-type plants. These plants also exhibited a large drop in silique and seed arsenic concentrations when fed with arsenite through the leaves. We conclude that in Arabidopsis, inositol transporters are responsible for arsenite loading into the phloem, the key source of arsenic in seeds.
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Affiliation(s)
- Gui-Lan Duan
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Ying Hu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Sabine Schneider
- Molekulare Pflanzenphysiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
- Erlangen Center of Plant Science (ECROPS), Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - Joseph McDermott
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA
| | - Jian Chen
- Department of Cellular Biology and Pharmacology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL 33199, USA
| | - Norbert Sauer
- Molekulare Pflanzenphysiologie, Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
- Erlangen Center of Plant Science (ECROPS), Friedrich-Alexander-Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany
| | - Barry P. Rosen
- Department of Cellular Biology and Pharmacology, Florida International University, Herbert Wertheim College of Medicine, Miami, FL 33199, USA
| | - Birgit Daus
- Helmholtz Centre for Environmental Research GmbH – UFZ, Department Analytical Chemistry, Permoserstrasse 15/04318 Leipzig/Germany
| | - Zijuan Liu
- Department of Biological Sciences, Oakland University, Rochester, MI 48309, USA
| | - Yong-Guan Zhu
- State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Science, Xiamen, China
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Redekar NR, Biyashev RM, Jensen RV, Helm RF, Grabau EA, Maroof MAS. Genome-wide transcriptome analyses of developing seeds from low and normal phytic acid soybean lines. BMC Genomics 2015; 16:1074. [PMID: 26678836 PMCID: PMC4683714 DOI: 10.1186/s12864-015-2283-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Accepted: 12/10/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Low phytic acid (lpa) crops are potentially eco-friendly alternative to conventional normal phytic acid (PA) crops, improving mineral bioavailability in monogastric animals as well as decreasing phosphate pollution. The lpa crops developed to date carry mutations that are directly or indirectly associated with PA biosynthesis and accumulation during seed development. These lpa crops typically exhibit altered carbohydrate profiles, increased free phosphate, and lower seedling emergence, the latter of which reduces overall crop yield, hence limiting their large-scale cultivation. Improving lpa crop yield requires an understanding of the downstream effects of the lpa genotype on seed development. Towards that end, we present a comprehensive comparison of gene-expression profiles between lpa and normal PA soybean lines (Glycine max) at five stages of seed development using RNA-Seq approaches. The lpa line used in this study carries single point mutations in a myo-inositol phosphate synthase gene along with two multidrug-resistance protein ABC transporter genes. RESULTS RNA sequencing data of lpa and normal PA soybean lines from five seed-developmental stages (total of 30 libraries) were used for differential expression and functional enrichment analyses. A total of 4235 differentially expressed genes, including 512-transcription factor genes were identified. Eighteen biological processes such as apoptosis, glucan metabolism, cellular transport, photosynthesis and 9 transcription factor families including WRKY, CAMTA3 and SNF2 were enriched during seed development. Genes associated with apoptosis, glucan metabolism, and cellular transport showed enhanced expression in early stages of lpa seed development, while those associated with photosynthesis showed decreased expression in late developmental stages. The results suggest that lpa-causing mutations play a role in inducing and suppressing plant defense responses during early and late stages of seed development, respectively. CONCLUSIONS This study provides a global perspective of transcriptomal changes during soybean seed development in an lpa mutant. The mutants are characterized by earlier expression of genes associated with cell wall biosynthesis and a decrease in photosynthetic genes in late stages. The biological processes and transcription factors identified in this study are signatures of lpa-causing mutations.
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Affiliation(s)
- Neelam R Redekar
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
| | - Ruslan M Biyashev
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
| | - Roderick V Jensen
- Department of Biological Sciences, Virginia Tech, Life Science I building, 24061, Blacksburg, VA, USA.
| | - Richard F Helm
- Department of Biochemistry, Virginia Tech, Life Science I building, 24061, Blacksburg, VA, USA.
| | - Elizabeth A Grabau
- Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Price Hall, 24061, Blacksburg, VA, USA.
| | - M A Saghai Maroof
- Department of Crop and Soil Environmental Sciences, Virginia Tech, 185 AgQuad Lane, 24061, Blacksburg, VA, USA.
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Sparvoli F, Cominelli E. Seed Biofortification and Phytic Acid Reduction: A Conflict of Interest for the Plant? PLANTS 2015; 4:728-55. [PMID: 27135349 PMCID: PMC4844270 DOI: 10.3390/plants4040728] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 11/13/2015] [Indexed: 02/03/2023]
Abstract
Most of the phosphorus in seeds is accumulated in the form of phytic acid (myo-inositol-1,2,3,4,5,6-hexakisphosphate, InsP6). This molecule is a strong chelator of cations important for nutrition, such as iron, zinc, magnesium, and calcium. For this reason, InsP6 is considered an antinutritional factor. In recent years, efforts to biofortify seeds through the generation of low phytic acid (lpa) mutants have been noteworthy. Moreover, genes involved in the biosynthesis and accumulation of this molecule have been isolated and characterized in different species. Beyond its role in phosphorus storage, phytic acid is a very important signaling molecule involved in different regulatory processes during plant development and responses to different stimuli. Consequently, many lpa mutants show different negative pleitotropic effects. The strength of these pleiotropic effects depends on the specific mutated gene, possible functional redundancy, the nature of the mutation, and the spatio-temporal expression of the gene. Breeding programs or transgenic approaches aimed at development of new lpa mutants must take into consideration these different aspects in order to maximize the utility of these mutants.
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Affiliation(s)
- Francesca Sparvoli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
| | - Eleonora Cominelli
- Institute of Agricultural Biology and Biotechnology, CNR, Via Bassini 15, 20133 Milan, Italy.
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Fiesselmann BS, Luichtl M, Yang X, Matthes M, Peis O, Torres-Ruiz RA. Ectopic shoot meristem generation in monocotyledonous rpk1 mutants is linked to SAM loss and altered seedling morphology. BMC PLANT BIOLOGY 2015; 15:171. [PMID: 26150008 PMCID: PMC4492102 DOI: 10.1186/s12870-015-0556-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Accepted: 06/16/2015] [Indexed: 06/01/2023]
Abstract
BACKGROUND In dicot Arabidopsis thaliana embryos two cotyledons develop largely autonomously from the shoot apical meristem (SAM). Recessive mutations in the Arabidopsis receptor-like kinase RPK1 lead to monocotyledonous seedlings, with low (10 %) penetrance due to complex functional redundancy. In strong rpk1 alleles, about 10 % of these (i. e. 1 % of all homozygotes) did not develop a SAM. We wondered whether RPK1 might also control SAM gene expression and SAM generation in addition to its known stochastic impact on cell division and PINFORMED1 (PIN1) polarity in the epidermis. RESULTS SAM-less seedlings developed a simple morphology with a straight and continuous hypocotyl-cotyledon structure lacking a recognizable epicotyl. According to rpk1's auxin-related PIN1 defect, the seedlings displayed defects in the vascular tissue. Surprisingly, SAM-less seedlings variably expressed essential SAM specific genes along the hypocotyl-cotyledon structure up into the cotyledon lamina. Few were even capable of developing an ectopic shoot meristem (eSM) on top of the cotyledon. CONCLUSIONS The results highlight the developmental autonomy of the SAM vs. cotyledons and suggest that the primary rpk1 defect does not lie in the seedling's ability to express SAM genes or to develop a shoot meristem. Rather, rpk1's known defects in cell division and auxin homeostasis, by disturbed PIN1 polarity, impact on SAM and organ generation. In early embryo stages this failure generates a simplified monocotyledonous morphology. Once generated, this likely entails a loss of positional information that in turn affects the spatiotemporal development of the SAM. SAM-bearing and SAM-less monocotyledonous phenotypes show morphological similarities either to real monocots or to dicot species, which only develop one cotyledon. The specific cotyledon defect in rpk1 mutants thus sheds light upon the developmental implications of the transition from two cotyledons to one.
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Affiliation(s)
- Birgit S Fiesselmann
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
| | - Miriam Luichtl
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
| | - Xiaomeng Yang
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
| | - Michaela Matthes
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
- Lehrstuhl für Pflanzenzüchtung, Technische Universität München, Wissenschaftszentrum Weihenstephan, Liesel-Beckmann-Str. 2, D-85354, Freising, Germany.
| | - Ottilie Peis
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
| | - Ramon A Torres-Ruiz
- Lehrstuhl für Genetik, Technische Universität München, Wissenschaftszentrum Weihenstephan, Emil-Ramann-Str. 8, D-85354, Freising, Germany.
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Biochemical Modulation of Lipid Pathway in Microalgae Dunaliella sp. for Biodiesel Production. BIOMED RESEARCH INTERNATIONAL 2015; 2015:597198. [PMID: 26146623 PMCID: PMC4469783 DOI: 10.1155/2015/597198] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 01/07/2015] [Accepted: 01/08/2015] [Indexed: 12/31/2022]
Abstract
Exploitation of renewable sources of energy such as algal biodiesel could turn energy supplies problem around. Studies on a locally isolated strain of Dunaliella sp. showed that the mean lipid content in cultures enriched by 200 mg L(-1) myoinositol was raised by around 33% (1.5 times higher than the control). Similarly, higher lipid productivity values were achieved in cultures treated by 100 and 200 mg L(-1) myoinositol. Fluorometry analyses (microplate fluorescence and flow cytometry) revealed increased oil accumulation in the Nile red-stained algal samples. Moreover, it was predicted that biodiesel produced from myoinositol-treated cells possessed improved oxidative stability, cetane number, and cloud point values. From the genomic point of view, real-time analyses revealed that myoinositol negatively influenced transcript abundance of AccD gene (one of the key genes involved in lipid production pathway) due to feedback inhibition and that its positive effect must have been exerted through other genes. The findings of the current research are not to interprete that myoinositol supplementation could answer all the challenges faced in microalgal biodiesel production but instead to show that "there is a there there" for biochemical modulation strategies, which we achieved, increased algal oil quantity and enhanced resultant biodiesel quality.
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Bruggeman Q, Prunier F, Mazubert C, de Bont L, Garmier M, Lugan R, Benhamed M, Bergounioux C, Raynaud C, Delarue M. Involvement of Arabidopsis Hexokinase1 in Cell Death Mediated by Myo-Inositol Accumulation. THE PLANT CELL 2015; 27:1801-14. [PMID: 26048869 PMCID: PMC4498202 DOI: 10.1105/tpc.15.00068] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 05/18/2015] [Indexed: 05/05/2023]
Abstract
Programmed cell death (PCD) is essential for several aspects of plant life, including development and stress responses. We recently identified the mips1 mutant of Arabidopsis thaliana, which is deficient for the enzyme catalyzing the limiting step of myo-inositol (MI) synthesis. One of the most striking features of mips1 is the light-dependent formation of lesions on leaves due to salicylic acid (SA)-dependent PCD. Here, we identified a suppressor of PCD by screening for mutations that abolish the mips1 cell death phenotype. Our screen identified the hxk1 mutant, mutated in the gene encoding the hexokinase1 (HXK1) enzyme that catalyzes sugar phosphorylation and acts as a genuine glucose sensor. We show that HXK1 is required for lesion formation in mips1 due to alterations in MI content, via SA-dependant signaling. Using two catalytically inactive HXK1 mutants, we also show that hexokinase catalytic activity is necessary for the establishment of lesions in mips1. Gas chromatography-mass spectrometry analyses revealed a restoration of the MI content in mips1 hxk1 that it is due to the activity of the MIPS2 isoform, while MIPS3 is not involved. Our work defines a pathway of HXK1-mediated cell death in plants and demonstrates that two MIPS enzymes act cooperatively under a particular metabolic status, highlighting a novel checkpoint of MI homeostasis in plants.
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Affiliation(s)
- Quentin Bruggeman
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Florence Prunier
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Christelle Mazubert
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Linda de Bont
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Marie Garmier
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Raphaël Lugan
- Institut de Biologie Moléculaire des Plantes, Unité Propre de Recherche 2357 CNRS, Université de Strasbourg, 67084 Strasbourg Cedex, France
| | - Moussa Benhamed
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France Division of Biological and Environmental Sciences and Engineering, Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal 23955-6900, Kingdom of Saudi Arabia
| | - Catherine Bergounioux
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Cécile Raynaud
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
| | - Marianne Delarue
- Université Paris-Sud, Institute of Plant Sciences Paris-Saclay IPS2 (Bâtiment 630), UMR CNRS-INRA 9213, Saclay Plant Sciences, 91405 Orsay, France
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Jain R, Lilley CJ, Urwin PE. Reduction of phytate by down-regulation of Arabidopsis thaliana MIPS and IPK1 genes alters susceptibility to beet cyst nematodes. NEMATOLOGY 2015. [DOI: 10.1163/15685411-00002874] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Phytates are mixed cationic salts of phytic acid formed by sequential phosphorylation of myo-inositol. Phytate is a phosphorus storage molecule essential for cellular and hormonal signalling in plants but exhibits anti-nutrient properties in animals. Low phytate plants have reduced basal resistance towards microbial pathogens and reduced tolerance to environmental stresses resulting in compromised yields. We report that three mutant lines of Arabidopsis thaliana, each with altered expression of myo-inositol-3-phosphate synthase (MIPS) isoforms, show altered susceptibility towards infection by the beet cyst nematode, Heterodera schachtii. Disruption of MIPS2 accompanied by increased MIPS1 expression results in reduced cyst nematode infection. Lack of MIPS3 resulted in a higher proportion of second-stage juveniles in the early phase of infection, suggesting delayed nematode development on mips3 mutants. Reduction in total phytate by down-regulation of the inositol polyphosphate kinase gene (IPK1) resulted in higher susceptibility to cyst nematode infection but a reduced average size of adult females. However, specific down-regulation of MIPS gene expression reduces susceptibility as myo-inositol is required to feed into the myo-inositol oxygenase pathway, which has an important role in development of the cyst nematode feeding site.
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Affiliation(s)
- Ritushree Jain
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Catherine J. Lilley
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
| | - Peter E. Urwin
- Centre for Plant Sciences, Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK
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Bruggeman Q, Raynaud C, Benhamed M, Delarue M. To die or not to die? Lessons from lesion mimic mutants. FRONTIERS IN PLANT SCIENCE 2015; 6:24. [PMID: 25688254 PMCID: PMC4311611 DOI: 10.3389/fpls.2015.00024] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 01/12/2015] [Indexed: 05/19/2023]
Abstract
Programmed cell death (PCD) is a ubiquitous genetically regulated process consisting in an activation of finely controlled signaling pathways that lead to cellular suicide. Although some aspects of PCD control appear evolutionary conserved between plants, animals and fungi, the extent of conservation remains controversial. Over the last decades, identification and characterization of several lesion mimic mutants (LMM) has been a powerful tool in the quest to unravel PCD pathways in plants. Thanks to progress in molecular genetics, mutations causing the phenotype of a large number of LMM and their related suppressors were mapped, and the identification of the mutated genes shed light on major pathways in the onset of plant PCD such as (i) the involvements of chloroplasts and light energy, (ii) the roles of sphingolipids and fatty acids, (iii) a signal perception at the plasma membrane that requires efficient membrane trafficking, (iv) secondary messengers such as ion fluxes and ROS and (v) the control of gene expression as the last integrator of the signaling pathways.
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Affiliation(s)
- Quentin Bruggeman
- Institut de Biologie des Plantes, UMR CNRS 8618, Université Paris-Sud, Saclay Plant SciencesOrsay, France
| | - Cécile Raynaud
- Institut de Biologie des Plantes, UMR CNRS 8618, Université Paris-Sud, Saclay Plant SciencesOrsay, France
| | - Moussa Benhamed
- Institut de Biologie des Plantes, UMR CNRS 8618, Université Paris-Sud, Saclay Plant SciencesOrsay, France
- Division of Biological and Environmental Sciences and Engineering, Center for Desert Agriculture, King Abdullah University of Science and TechnologyThuwal, Saudi Arabia
| | - Marianne Delarue
- Institut de Biologie des Plantes, UMR CNRS 8618, Université Paris-Sud, Saclay Plant SciencesOrsay, France
- *Correspondence: Marianne Delarue, Institut de Biologie des Plantes, UMR CNRS 8618, Université Paris-Sud, Saclay Plant Sciences, Bâtiment 630, Route de Noetzlin, 91405 Orsay Cedex, France e-mail:
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Boutté Y, Moreau P. Modulation of endomembranes morphodynamics in the secretory/retrograde pathways depends on lipid diversity. CURRENT OPINION IN PLANT BIOLOGY 2014; 22:22-29. [PMID: 25233477 DOI: 10.1016/j.pbi.2014.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 08/27/2014] [Accepted: 08/30/2014] [Indexed: 05/11/2023]
Abstract
Membrane lipids are crucial bricks for cell and organelle compartmentalization and their physical properties and interactions with other membrane partners (lipids or proteins) reveal lipids as key actors of the regulation of membrane morphodynamics in many cellular functions and especially in the secretory/retrograde pathways. Studies on membrane models have indicated diverse mechanisms by which membranes bend. Moreover, in vivo studies also indicate that membrane curvature can play crucial roles in the regulation of endomembrane morphodynamics, organelle morphology and transport vesicle formation. A role for enzymes of lipid metabolism and lipid-protein interactions will be discussed as crucial mechanisms in the regulation of membrane morphodynamics in the secretory/retrograde pathways.
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Affiliation(s)
- Yohann Boutté
- Laboratoire de Biogenèse Membranaire, UMR 5200 CNRS, University of Bordeaux, France
| | - Patrick Moreau
- Laboratoire de Biogenèse Membranaire, UMR 5200 CNRS, University of Bordeaux, France.
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Bruggeman Q, Garmier M, de Bont L, Soubigou-Taconnat L, Mazubert C, Benhamed M, Raynaud C, Bergounioux C, Delarue M. The Polyadenylation Factor Subunit CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR30: A Key Factor of Programmed Cell Death and a Regulator of Immunity in Arabidopsis. PLANT PHYSIOLOGY 2014; 165:732-746. [PMID: 24706550 PMCID: PMC4044851 DOI: 10.1104/pp.114.236083] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 04/02/2014] [Indexed: 05/20/2023]
Abstract
Programmed cell death (PCD) is essential for several aspects of plant life, including development and stress responses. Indeed, incompatible plant-pathogen interactions are well known to induce the hypersensitive response, a localized cell death. Mutational analyses have identified several key PCD components, and we recently identified the mips1 mutant of Arabidopsis (Arabidopsis thaliana), which is deficient for the key enzyme catalyzing the limiting step of myoinositol synthesis. One of the most striking features of mips1 is the light-dependent formation of lesions on leaves due to salicylic acid (SA)-dependent PCD, revealing roles for myoinositol or inositol derivatives in the regulation of PCD. Here, we identified a regulator of plant PCD by screening for mutants that display transcriptomic profiles opposing that of the mips1 mutant. Our screen identified the oxt6 mutant, which has been described previously as being tolerant to oxidative stress. In the oxt6 mutant, a transfer DNA is inserted in the CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR30 (CPSF30) gene, which encodes a polyadenylation factor subunit homolog. We show that CPSF30 is required for lesion formation in mips1 via SA-dependent signaling, that the prodeath function of CPSF30 is not mediated by changes in the glutathione status, and that CPSF30 activity is required for Pseudomonas syringae resistance. We also show that the oxt6 mutation suppresses cell death in other lesion-mimic mutants, including lesion-simulating disease1, mitogen-activated protein kinase4, constitutive expressor of pathogenesis-related genes5, and catalase2, suggesting that CPSF30 and, thus, the control of messenger RNA 3' end processing, through the regulation of SA production, is a key component of plant immune responses.
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Affiliation(s)
- Quentin Bruggeman
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Marie Garmier
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Linda de Bont
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Ludivine Soubigou-Taconnat
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Christelle Mazubert
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Moussa Benhamed
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Cécile Raynaud
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Catherine Bergounioux
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
| | - Marianne Delarue
- Université Paris-Sud, Institut de Biologie des Plantes, Unité Mixte de Recherche Centre National de la Recherche Scientifique 8618, Saclay Plant Sciences, F-91405 Orsay, France (Q.B., M.G., L.d.B., C.M., M.B., C.R., C.B., M.D.);Unité de Recherche en Génomique Végétale-Unité Mixte de Recherche-Institut National de la Recherche Agronomique 1165-Centre National de la Recherche Scientifique 8114, 91 057 Evry cedex, France (L.S.-T.); andDivision of Biological and Environmental Sciences and Engineering and Center for Desert Agriculture, King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia (M.B.)
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Zhu D, Wu Z, Cao G, Li J, Wei J, Tsuge T, Gu H, Aoyama T, Qu LJ. TRANSLUCENT GREEN, an ERF family transcription factor, controls water balance in Arabidopsis by activating the expression of aquaporin genes. MOLECULAR PLANT 2014; 7:601-15. [PMID: 24177687 DOI: 10.1093/mp/sst152] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Water is the most abundant molecule in almost all living organisms. Aquaporins are channel proteins that play critical roles in controlling the water content of cells. Here, we report the identification of an AP2/EREBP family transcription factor in Arabidopsis thaliana, TRANSLUCENT GREEN (TG), whose overexpression in transgenic plants gave enhanced drought tolerance and vitrified leaves. TG protein is localized in the nucleus, binds DRE and GCC elements in vitro, and acts as a transcriptional activator in yeast cells. Microarray analysis revealed a total of 330 genes regulated by TG, among which five genes encode aquaporins. A transient expression assay showed that TG directly binds to the promoters of three aquaporin genes, such as AtTIP1;1, AtTIP2;3, and AtPIP2;2, indicating that TG directly regulates the expression of these genes. Moreover, overexpression of AtTIP1;1 resulted in vitrified phenotypes in transgenic Arabidopsis plants, similar to those observed in TG overexpression lines. Water injection into wild-type leaves recapitulated the vitrified leaf phenotypes, which was reversed by cutting off the water supply from vascular bundles. Taken together, our data support that TG controls water balance in Arabidopsis through directly activating the expression of aquaporin genes.
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Affiliation(s)
- Danling Zhu
- a State Key Laboratory of Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences, College of Life Sciences, Peking University, Beijing 100871, China
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46
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Qin Y, Song W, Xiao S, Yin G, Zhu Y, Yan Y, Hu Y. Stress-related genes distinctly expressed in unfertilized wheat ovaries under both normal and water deficit conditions whereas differed in fertilized ovaries. J Proteomics 2014; 102:11-27. [PMID: 24607492 DOI: 10.1016/j.jprot.2014.02.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 02/16/2014] [Accepted: 02/21/2014] [Indexed: 12/17/2022]
Abstract
UNLABELLED In this study, a proteomic approach was utilized to identify differentially accumulated proteins in developing wheat ovaries before and after fertilization and in response to water deficit. Proteins were extracted, quantified, and resolved by 2-DE at pH4-7. Statistical analysis of spot intensity was performed by using principal component analysis and samples were clustered by using Euclidean distance. In total, 136 differentially accumulated protein spots representing 88 unique proteins were successfully identified by MALDI-TOF/TOF MS. Under normal conditions, stress-related proteins were abundant in unfertilized ovaries while proteins involved in the metabolism of energy and matter were enriched in fertilized ovaries just 48h after fertilization. Similar trends were observed in unfertilized and fertilized wheat ovaries under water deficit conditions, except for increased accumulation of stress-related proteins in fertilized ovaries. Some proteins required for normal development were not present in ovaries subjected to water deficit. Our comprehensive results provide new insights into the biochemical mechanisms involved in ovary development before and after fertilization and in tolerance to water deficit. BIOLOGICAL SIGNIFICANCE Fertilization initiates the most dramatic changes that occur in the life cycle of higher plants; research into differences in gene expression before and after ovary pollination can make a substantial contribution to understanding the physiological and biochemical processes associated with fertilization. To date, a small number of studies have examined changes in transcriptional activity of the developing plant embryo sac before and after fertilization. However, comparative proteomic analysis of wheat ovary development before and after fertilization, and in response to water deficit, has not yet been reported. Our comprehensive results provide new insights into the biochemical mechanisms involved in ovary development before and after fertilization and in tolerance to water deficit.
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Affiliation(s)
- Yajuan Qin
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Wanlu Song
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Shuyang Xiao
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Guangjun Yin
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Yan Zhu
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Yueming Yan
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
| | - Yingkao Hu
- College of Life Sciences, Capital Normal University, Beijing 100048, China.
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Macrae JI, Lopaticki S, Maier AG, Rupasinghe T, Nahid A, Cowman AF, McConville MJ. Plasmodium falciparum is dependent on de novo myo-inositol biosynthesis for assembly of GPI glycolipids and infectivity. Mol Microbiol 2014; 91:762-76. [PMID: 24350823 DOI: 10.1111/mmi.12496] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2013] [Indexed: 12/27/2022]
Abstract
Intra-erythrocytic stages of the malaria parasite, Plasmodium falciparum, are thought to be dependent on de novo synthesis of phosphatidylinositol, as red blood cells (RBC) lack the capacity to synthesize this phospholipid. The myo-inositol headgroup of PI can either be synthesized de novo or scavenged from the RBC. An untargeted metabolite profiling of P. falciparum infected RBC showed that trophozoite and schizont stages accumulate high levels of myo-inositol-3-phosphate, indicating increased de novo biosynthesis of myo-inositol from glucose 6-phosphate. Metabolic labelling studies with (13) C-U-glucose in the presence and absence of exogenous inositol confirmed that de novo myo-inositol synthesis occurs in parallel with myo-inositol salvage pathways. Unexpectedly, while both endogenous and scavenged myo-inositol was used to synthesize bulk PI, only de novo-synthesized myo-inositol was incorporated into GPI glycolipids. Moreover, gene disruption studies suggested that the INO1 gene, encoding myo-inositol 3-phosphate synthase, is essential in asexual parasite stages. Together these findings suggest that P. falciparum asexual stages are critically dependent on de novo myo-inositol biosynthesis for assembly of a sub-pool of PI species and GPI biosynthesis. These findings highlight unexpected complexity in phospholipid biosynthesis in P. falciparum and a lack of redundancy in some nutrient salvage versus endogenous biosynthesis pathways.
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Affiliation(s)
- James I Macrae
- Department of Biochemistry and Molecular Biology, Bio21 Institute of Molecular Science and Biotechnology, 30 Flemington Road, Melbourne, Vic., 3010, Australia
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48
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Maneta-Peyret L, Lai YS, Stefano G, Fouillen L, Brandizzi F, Moreau P. Phospholipid biosynthesis increases in RHD3-defective mutants. PLANT SIGNALING & BEHAVIOR 2014; 9:e29657. [PMID: 25763700 PMCID: PMC4203640 DOI: 10.4161/psb.29657] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 06/19/2014] [Accepted: 06/19/2014] [Indexed: 05/18/2023]
Abstract
RHD3, a member of the ER-shaping dynamin-like GTPases, is required in the transition from a cisternal to a tubular ER architecture during cell growth. The aberrant ER morphology in rhd3 mutants may be correlated with alterations of the ER lipid bilayer. We analyzed the lipid fraction of rhd3 mutants at qualitative and quantitative levels. We observed an increase of the amount of phospholipids but also of proteins in the mutants, indicating an overall increase of ER membranes. This increase may indicate that phospholipid biosynthesis is deregulated in rhd3 mutants. It was shown that overexpression of PIS1 and PIS2 (involved in phosphatidylinositol biosynthesis) induces the synthesis of phosphatidylinositol (PI) but also of phosphatidic acid and that overexpression of PIS1 also induces the synthesis of phosphatidylethanolamine and diacylglycerol. (1) We wondered whether PIS1 or PIS2 could be linked to the increase of the amount of phospholipids in rhd3 mutants. To answer, we measured the phospholipid composition in the double mutants rhd3-7/pis1 and rhd3-7/pis2. The phospholipid increase in the rhd3 mutant was compensated in rhd3-7/pis1 but not rhd3-7/pis2. Our results suggest a possible deregulation of PIS1 in the rhd3 mutant.
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Affiliation(s)
- Lilly Maneta-Peyret
- Laboratoire de Biogenèse Membranaire ; UMR 5200 CNRS-University of Bordeaux, INRA Bordeaux Aquitaine ; Villenave d'Ornon, France
| | - Ya-Shiuan Lai
- Department of Energy Plant Research Laboratory; Michigan State University; East Lansing, MI USA
| | - Giovanni Stefano
- Department of Energy Plant Research Laboratory; Michigan State University; East Lansing, MI USA
| | - Laetitia Fouillen
- Laboratoire de Biogenèse Membranaire ; UMR 5200 CNRS-University of Bordeaux, INRA Bordeaux Aquitaine ; Villenave d'Ornon, France
| | - Federica Brandizzi
- Department of Energy Plant Research Laboratory; Michigan State University; East Lansing, MI USA
- Correspondence to: Federica Brandizzi, and Patrick Moreau,
| | - Patrick Moreau
- Laboratoire de Biogenèse Membranaire ; UMR 5200 CNRS-University of Bordeaux, INRA Bordeaux Aquitaine ; Villenave d'Ornon, France
- Correspondence to: Federica Brandizzi, and Patrick Moreau,
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Siddique S, Endres S, Sobczak M, Radakovic ZS, Fragner L, Grundler FMW, Weckwerth W, Tenhaken R, Bohlmann H. Myo-inositol oxygenase is important for the removal of excess myo-inositol from syncytia induced by Heterodera schachtii in Arabidopsis roots. THE NEW PHYTOLOGIST 2014; 201:476-485. [PMID: 24117492 PMCID: PMC4285123 DOI: 10.1111/nph.12535] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Accepted: 08/21/2013] [Indexed: 05/23/2023]
Abstract
The enzyme myo-inositol oxygenase is the key enzyme of a pathway leading from myo-inositol to UDP-glucuronic acid. In Arabidopsis, myo-inositol oxygenase is encoded by four genes. All genes are strongly expressed in syncytia induced by the beet cyst nematode Heterodera schachtii in Arabidopsis roots. Here, we studied the effect of a quadruple myo-inositol oxygenase mutant on nematode development. We performed metabolite profiling of syncytia induced in roots of the myo-inositol oxygenase quadruple mutant. The role of galactinol in syncytia was studied using Arabidopsis lines with elevated galactinol levels and by supplying galactinol to wild-type seedlings. The quadruple myo-inositol oxygenase mutant showed a significant reduction in susceptibility to H. schachtii, and syncytia had elevated myo-inositol and galactinol levels and an elevated expression level of the antimicrobial thionin gene Thi2.1. This reduction in susceptibility could also be achieved by exogenous application of galactinol to wild-type seedlings. The primary function of myo-inositol oxygenase for syncytium development is probably not the production of UDP-glucuronic acid as a precursor for cell wall polysaccharides, but the reduction of myo-inositol levels and thereby a reduction in the galactinol level to avoid the induction of defence-related genes.
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Affiliation(s)
- Shahid Siddique
- Division of Plant Protection, Department of Crop
Sciences, University of Natural Resources and Life SciencesA-1019, Vienna, Austria
| | - Stefanie Endres
- Plant Physiology, University of SalzburgHellbrunnerstr. 34, A-5020, Salzburg, Austria
| | - Miroslaw Sobczak
- Department of Botany, Warsaw University of Life Sciences
(SGGW)02-787, Warsaw, Poland
| | - Zoran S Radakovic
- INRES, Department of Molecular Phytomedicine, University
of BonnKarlrobert–Kreiten–Str. 13, 53115, Bonn, Germany
| | - Lena Fragner
- Department of Molecular Systems Biology, University of
ViennaA-1090, Vienna, Austria
| | - Florian M W Grundler
- INRES, Department of Molecular Phytomedicine, University
of BonnKarlrobert–Kreiten–Str. 13, 53115, Bonn, Germany
| | - Wolfram Weckwerth
- Department of Molecular Systems Biology, University of
ViennaA-1090, Vienna, Austria
| | - Raimund Tenhaken
- Plant Physiology, University of SalzburgHellbrunnerstr. 34, A-5020, Salzburg, Austria
| | - Holger Bohlmann
- Division of Plant Protection, Department of Crop
Sciences, University of Natural Resources and Life SciencesA-1019, Vienna, Austria
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