1
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Lim MN, Lee SE, Jeon JS, Yoon IS, Hwang YS. OsbZIP38/87-mediated activation of OsHXK7 improves the viability of rice cells under hypoxic conditions. JOURNAL OF PLANT PHYSIOLOGY 2024; 293:154182. [PMID: 38277982 DOI: 10.1016/j.jplph.2024.154182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 01/09/2024] [Accepted: 01/12/2024] [Indexed: 01/28/2024]
Abstract
Maintenance of energy metabolism is critical for rice (Oryza sativa) tolerance under submerged cultivation. Here, OsHXK7 was the most actively induced hexokinase gene in the embryos of hypoxically germinating rice seeds. Suspension-cultured cells established from seeds of T-DNA null mutants for the OsHXK7 locus did not regrow after 3-d-hypoxic stress and showed increased susceptibility to low-oxygen stress-in terms of viability-and decreased alcoholic fermentation activities compared to those of the wild-type. The promoter element containing the TGACG-motif, a well-known target site for the basic leucine zipper (bZIP) transcription factors, was responsible for sugar regulation of the OsHXK7 promoter activity. Systematic screening of the OsbZIP genes showing the similar expression patterns to that of OsHXK7 in the transcriptomic datasets produced two bZIP genes, OsbZIP38 and 87, belonging to the S1 bZIP subfamily as the candidate for the activator for this gene expression. Gain- and loss-of-function experiments through transient expression assays have demonstrated that these two bZIP proteins are indeed involved in the induction of OsHXK7 expression under starvation or low-energy conditions. Our finding suggests that C/S1 bZIP network-mediated hypoxic deregulation of sugar-responsive genes may work in concert for the molecular adaptation of rice cells to submergence.
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Affiliation(s)
- Mi-Na Lim
- Department of Biotechnology, CHA University, Seongnam, 13488, South Korea
| | - Sung-Eun Lee
- Department of Systems Biotechnology, Konkuk University, Seoul, 143-701, South Korea
| | - Jong-Seong Jeon
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea
| | - In Sun Yoon
- Molecular Breeding Division, National Academy of Agricultural Science, Jeonju, 565-851, South Korea
| | - Yong-Sic Hwang
- Department of Systems Biotechnology, Konkuk University, Seoul, 143-701, South Korea.
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2
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Tamizi AA, Md-Yusof AA, Mohd-Zim NA, Nazaruddin NH, Sekeli R, Zainuddin Z, Samsulrizal NH. Agrobacterium-mediated in planta transformation of cut coleoptile: a new, simplified, and tissue culture-independent method to deliver the CRISPR/Cas9 system in rice. Mol Biol Rep 2023; 50:9353-9366. [PMID: 37819494 DOI: 10.1007/s11033-023-08842-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 09/25/2023] [Indexed: 10/13/2023]
Abstract
BACKGROUND Agrobacterium-mediated transformation and particle bombardment are the two common approaches for genome editing in plant species using CRISPR/Cas9 system. Both methods require careful manipulations of undifferentiated cells and tissue culture to regenerate the potentially edited plants. However, tissue culture techniques are laborious and time-consuming. METHODS AND RESULTS In this study, we have developed a simplified, tissue culture-independent protocol to deliver the CRISPR/Cas9 system through in planta transformation in Malaysian rice (Oryza sativa L. subsp. indica cv. MR 219). Sprouting seeds with cut coleoptile were used as the target for the infiltration by Agrobacterium tumefaciens and we achieved 9% transformation efficiency. In brief, the dehusked seeds were surface-sterilised and imbibed, and the coleoptile was cut to expose the apical meristem. Subsequently, the cut coleoptile was inoculated with A. tumefaciens strain EHA105 harbouring CRISPR/Cas9 expression vector. The co-cultivation was conducted for five to six days in a dark room (25 ± 2 °C) followed by rooting, acclimatisation, and growing phases. Two-month-old plant leaves were then subjected to a hygromycin selection, and hygromycin-resistant plants were identified as putative transformants. Further validation through the polymerase chain reaction verified the integration of the Cas9 gene in four putative T0 lines. During the fruiting stage, it was confirmed that the Cas9 gene was still present in three randomly selected tillers from two 4-month-old transformed plants. CONCLUSION This protocol provides a rapid method for editing the rice genome, bypassing the need for tissue culture. This article is the first to report the delivery of the CRISPR/Cas9 system for in planta transformation in rice.
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Affiliation(s)
- Amin-Asyraf Tamizi
- Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
- Biotechnology and Nanotechnology Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), 43400, Serdang, Selangor, Malaysia
| | - Anis Afuza Md-Yusof
- Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
| | - Nurul Asyikin Mohd-Zim
- Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
- FGV R&D Sdn. Bhd, FGV Innovation Centre, PT 23417 Lengkuk Teknologi, 71760, Bandar Enstek, Negeri Sembilan, Malaysia
| | - Nazrul Hisham Nazaruddin
- Biotechnology and Nanotechnology Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), 43400, Serdang, Selangor, Malaysia
| | - Rogayah Sekeli
- Biotechnology and Nanotechnology Research Centre, Malaysian Agricultural Research and Development Institute (MARDI), 43400, Serdang, Selangor, Malaysia.
| | - Zarina Zainuddin
- Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
- Plant Productivity and Sustainable Resource Unit, Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia
| | - Nurul Hidayah Samsulrizal
- Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia.
- Plant Productivity and Sustainable Resource Unit, Department of Plant Science, Kulliyyah of Science, International Islamic University Malaysia (IIUM), 25200, Kuantan, Pahang, Malaysia.
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3
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Son S, Park SR. The rice SnRK family: biological roles and cell signaling modules. FRONTIERS IN PLANT SCIENCE 2023; 14:1285485. [PMID: 38023908 PMCID: PMC10644236 DOI: 10.3389/fpls.2023.1285485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 10/19/2023] [Indexed: 12/01/2023]
Abstract
Stimulus-activated signaling pathways orchestrate cellular responses to control plant growth and development and mitigate the effects of adverse environmental conditions. During this process, signaling components are modulated by central regulators of various signal transduction pathways. Protein phosphorylation by kinases is one of the most important events transmitting signals downstream, via the posttranslational modification of signaling components. The plant serine and threonine kinase SNF1-related protein kinase (SnRK) family, which is classified into three subgroups, is highly conserved in plants. SnRKs participate in a wide range of signaling pathways and control cellular processes including plant growth and development and responses to abiotic and biotic stress. Recent notable discoveries have increased our understanding of how SnRKs control these various processes in rice (Oryza sativa). In this review, we summarize current knowledge of the roles of OsSnRK signaling pathways in plant growth, development, and stress responses and discuss recent insights. This review lays the foundation for further studies on SnRK signal transduction and for developing strategies to enhance stress tolerance in plants.
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Affiliation(s)
| | - Sang Ryeol Park
- National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, Republic of Korea
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4
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Yin CC, Huang YH, Zhang X, Zhou Y, Chen SY, Zhang JS. Ethylene-mediated regulation of coleoptile elongation in rice seedlings. PLANT, CELL & ENVIRONMENT 2023; 46:1060-1074. [PMID: 36397123 DOI: 10.1111/pce.14492] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 09/05/2022] [Accepted: 11/09/2022] [Indexed: 06/16/2023]
Abstract
Rice is an important food crop in the world and the study of its growth and plasticity has a profound influence on sustainable development. Ethylene modulates multiple agronomic traits of rice as well as abiotic and biotic stresses during its lifecycle. It has diverse roles, depending on the organs, developmental stages and environmental conditions. Compared to Arabidopsis (Arabidopsis thaliana), rice ethylene signalling pathway has its own unique features due to its special semiaquatic living environment and distinct plant structure. Ethylene signalling and responses are part of an intricate network in crosstalk with internal and external factors. This review will summarize the current progress in the mechanisms of ethylene-regulated coleoptile growth in rice, with a special focus on ethylene signaling and interaction with other hormones. Insights into these molecular mechanisms may shed light on ethylene biology and should be beneficial for the genetic improvement of rice and other crops.
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Affiliation(s)
- Cui-Cui Yin
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
| | - Yi-Hua Huang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
| | - Xun Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Yang Zhou
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
| | - Shou-Yi Chen
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
| | - Jin-Song Zhang
- State Key Lab of Plant Genomics, Institute of Genetics and Developmental Biology, INASEED, Chinese Academy of Sciences, Beijing, China
- College of Advanced Agricultural Sciences, University of Chinese Academy of Sciences, Beijing, China
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5
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Shiono K, Koshide A, Iwasaki K, Oguri K, Fukao T, Larsen M, Glud RN. Imaging the snorkel effect during submerged germination in rice: Oxygen supply via the coleoptile triggers seminal root emergence underwater. FRONTIERS IN PLANT SCIENCE 2022; 13:946776. [PMID: 35968087 PMCID: PMC9372499 DOI: 10.3389/fpls.2022.946776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Submergence during germination impedes aerobic metabolisms and limits the growth of most higher plants. However, some wetland plants including rice can germinate under submerged conditions. It has long been hypothesized that the first elongating shoot tissue, the coleoptile, acts as a snorkel to acquire atmospheric oxygen (O2) to initiate the first leaf elongation and seminal root emergence. Here, we obtained direct evidence for this hypothesis by visualizing the spatiotemporal O2 dynamics during submerged germination in rice using a planar O2 optode system. In parallel with the O2 imaging, we tracked the anatomical development of shoot and root tissues in real-time using an automated flatbed scanner. Three hours after the coleoptile tip reached the water surface, O2 levels around the embryo transiently increased. At this time, the activity of alcohol dehydrogenase (ADH), an enzyme critical for anaerobic metabolism, was significantly reduced, and the coleorhiza covering the seminal roots in the embryo was broken. Approximately 10 h after the transient burst in O2, seminal roots emerged. A transient O2 burst around the embryo was shown to be essential for seminal root emergence during submerged rice germination. The parallel application of a planar O2 optode system and automated scanning system can be a powerful tool for examining how environmental conditions affect germination in rice and other plants.
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Affiliation(s)
- Katsuhiro Shiono
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Fukui, Japan
| | - Akiko Koshide
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Fukui, Japan
| | - Kazunari Iwasaki
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Fukui, Japan
| | - Kazumasa Oguri
- HADAL and Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
- Research Institute of Global Change, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
| | - Takeshi Fukao
- Department of Bioscience and Biotechnology, Fukui Prefectural University, Fukui, Japan
| | - Morten Larsen
- HADAL and Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
| | - Ronnie N. Glud
- HADAL and Nordcee, Department of Biology, University of Southern Denmark, Odense, Denmark
- Department of Ocean and Environmental Sciences, Tokyo University of Marine Science and Technology, Minato, Japan
- Danish Institute of Advanced Studies, University of Southern Denmark, Odense, Denmark
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6
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Kumari A, Singh P, Kaladhar VC, Paul D, Pathak PK, Gupta KJ. Phytoglobin-NO cycle and AOX pathway play a role in anaerobic germination and growth of deepwater rice. PLANT, CELL & ENVIRONMENT 2022; 45:178-190. [PMID: 34633089 DOI: 10.1111/pce.14198] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 09/17/2021] [Accepted: 09/18/2021] [Indexed: 06/13/2023]
Abstract
An important and interesting feature of rice is that it can germinate under anoxic conditions. Though several biochemical adaptive mechanisms play an important role in the anaerobic germination of rice but the role of phytoglobin-nitric oxide cycle and alternative oxidase pathway is not known, therefore in this study we investigated the role of these pathways in anaerobic germination. Under anoxic conditions, deepwater rice germinated much higher and rapidly than aerobic condition and the anaerobic germination and growth were much higher in the presence of nitrite. The addition of nitrite stimulated NR activity and NO production. Important components of phytoglobin-NO cycle such as methaemoglobin reductase activity, expression of Phytoglobin1, NIA1 were elevated under anaerobic conditions in the presence of nitrite. The operation of phytoglobin-NO cycle also enhanced anaerobic ATP generation, LDH, ADH activities and in parallel ethylene levels were also enhanced. Interestingly nitrite suppressed the ROS production and lipid peroxidation. The reduction of ROS was accompanied by enhanced expression of mitochondrial alternative oxidase protein and its capacity. Application of AOX inhibitor SHAM inhibited the anoxic growth mediated by nitrite. In addition, nitrite improved the submergence tolerance of seedlings. Our study revealed that nitrite driven phytoglobin-NO cycle and AOX are crucial players in anaerobic germination and growth of deepwater rice.
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Affiliation(s)
- Aprajita Kumari
- National Institute for Plant Genome Research, New Delhi, India
- Amity Institute of Biotechnology, Amity University, Noida, India
| | - Pooja Singh
- National Institute for Plant Genome Research, New Delhi, India
| | | | - Debarati Paul
- Amity Institute of Biotechnology, Amity University, Noida, India
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7
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Wang S, Liu W, He Y, Adegoke TV, Ying J, Tong X, Li Z, Tang L, Wang H, Zhang J, Tian Z, Wang Y. bZIP72 promotes submerged rice seed germination and coleoptile elongation by activating ADH1. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 169:112-118. [PMID: 34775177 DOI: 10.1016/j.plaphy.2021.11.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 11/01/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Seed germination and coleoptile elongation in response to flooding stress is an important trait for the direct seeding of rice. However, the genes regulating this process and the underlying mechanisms are little understood. In this study, bZIP72 was identified as a positive regulator of seed germination under submergence. Transcription of bZIP72 was submergence induced. Over-expression of bZIP72 enhanced submerged seed germination and coleoptile elongation, while bzip72 mutants exhibited the opposite tendency. Using biochemical interaction assays, we showed that bZIP72 directly binds to the promoter of alcohol dehydrogenase 1 (ADH1), enhances its activity, and subsequently produces more NAD+, NADH and ATP involved in the alcoholic fermentation and glycolysis pathway, ultimately providing necessary energy reserves thus conferring tolerance to submergence. In summary, this research provides novel insights into bZIP72 participation in submerged rice seed germination and coleoptile elongation.
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Affiliation(s)
- Shuang Wang
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Life Science, Yangtze University, Jingzhou, 434025, China
| | - Wanning Liu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Yong He
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Life Science, Yangtze University, Jingzhou, 434025, China
| | - Tosin Victor Adegoke
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Jiezheng Ying
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China; State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, LinAn, 311300, China
| | - Xiaohong Tong
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Zhiyong Li
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Liqun Tang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Huimei Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China
| | - Jian Zhang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China.
| | - Zhihong Tian
- Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Hubei Key Laboratory of Waterlogging Disaster and Agricultural Use of Wetland, College of Life Science, Yangtze University, Jingzhou, 434025, China.
| | - Yifeng Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 311400, China.
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8
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Zhang G, Liu Y, Gui R, Wang Z, Li Z, Han Y, Guo X, Sun J. Comparative multi-omics analysis of hypoxic germination tolerance in weedy rice embryos and coleoptiles. Genomics 2021; 113:3337-3348. [PMID: 34298069 DOI: 10.1016/j.ygeno.2021.07.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 06/04/2021] [Accepted: 07/17/2021] [Indexed: 10/20/2022]
Abstract
Hypoxic germination tolerance is an important trait for seedling establishment of direct-seeded rice. Our comparative metabolomics analysis revealed that weedy rice accumulated more sugar and amino acids than cultivated rice accumulated in the embryo and coleoptile tissues under hypoxic stress. At the transcriptional level, oxidative phosphorylation activity in weedy rice was higher than in cultivated rice that likely led to more efficient energy metabolism during hypoxic stress. Based on our comparative proteomics analysis, enriched proteins related to cell wall implied that the advantages in energy metabolism of weedy rice were ultimately reflected in the formation of tissue structures. In this study, we found that most of key hypoxic germination tolerance (HGT) genes shared the same genetic backgrounds with Oryza japonica, however, several of them genetically similar to other Oryza plant also play important roles. Our findings suggest weedy rice can serve as genetic resources for the improvement of direct-seeding rice.
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Affiliation(s)
- Guangchen Zhang
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China
| | - Youhong Liu
- Institute of Crop Cultivation and Tillage, Heilongjiang Academy of Agricultural Sciences, Heilongjiang Provincial Key Laboratory of Crop Molecular Design and Germplasm Innovation, Haerbin, 150086, China
| | - Rui Gui
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China
| | - Ziming Wang
- College of forestry, Shenyang Agricultural University, Shenyang 110161, China
| | - Zhuan Li
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China
| | - Yuqing Han
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China
| | - Xiaojia Guo
- Jinzhou Institute of Science and Technology, Jinzhou, 121000, China
| | - Jian Sun
- Rice Research Institute, Shenyang Agricultural University, Shenyang 110161, China.
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9
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Nghi KN, Tagliani A, Mariotti L, Weits DA, Perata P, Pucciariello C. Auxin is required for the long coleoptile trait in japonica rice under submergence. THE NEW PHYTOLOGIST 2021; 229:85-93. [PMID: 32609884 DOI: 10.1111/nph.16781] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Accepted: 06/20/2020] [Indexed: 06/11/2023]
Abstract
Rice coleoptile elongation under submergence guarantees fast seedling establishment in the field. We investigated the role of auxin in influencing the capacity of rice to produce a long coleoptile under water. In order to explore the complexity of auxin's role in coleoptile elongation, we used gene expression analysis, confocal microscopy of an auxin-responsive fluorescent reporter, gas chromatography coupled to tandem mass spectrometry (GC-MS/MS), and T-DNA insertional mutants of an auxin transport protein. We show that a higher auxin availability in the coleoptile correlates with the final coleoptile length under submergence. We also identified the auxin influx carrier AUX1 as a component influencing this trait under submergence. The coleoptile tip is involved in the final length of rice varieties harbouring a long coleoptile. Our experimental results indicate that auxin biosynthesis and transport underlies the differential elongation between short and long coleoptile-harbouring japonica rice varieties.
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Affiliation(s)
- Khac Nhu Nghi
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Andrea Tagliani
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- nanoPlant Centre @NEST, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Lorenzo Mariotti
- Department of Agriculture, Food and Environment, University of Pisa, Italy
| | - Daan A Weits
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- nanoPlant Centre @NEST, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Pierdomenico Perata
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- nanoPlant Centre @NEST, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Chiara Pucciariello
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
- nanoPlant Centre @NEST, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
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10
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Yu SM, Lee HT, Lo SF, Ho THD. How does rice cope with too little oxygen during its early life? THE NEW PHYTOLOGIST 2021; 229:36-41. [PMID: 31880324 DOI: 10.1111/nph.16395] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 11/28/2019] [Indexed: 05/25/2023]
Abstract
Most crops cannot germinate underwater. Rice exhibits certain degrees of tolerance to oxygen deficiency for anaerobic germination (AG) and anaerobic seedling development (ASD). Direct rice seeding, whereby seeds are sown into soil rather than transplanting seedlings from the nursery, becomes an increasingly popular cultivation method due to labor shortages and opportunities for sustainable cultivation. Flooding is common under direct seeding, but most rice varieties have poor capability of AG/ASD, which is a major obstacle to broad adoption of direct seeding. A better understanding of the physiological basis and molecular mechanisms regulating AG/ASD should facilitate rice breeding for enhanced seedling vigor under flooding. This review highlights recent advances on molecular and physiological mechanisms and future breeding strategies of rice AG/ASD.
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Affiliation(s)
- Su-May Yu
- Institute of Molecular Biology, Academia Sinica, Nankang, Taipei, 115, Taiwan
- Molecular and Cell Biology, Taiwan International Graduate Program, Academia Sinica and National Defense Medical Center, Taipei, Taiwan
- Biotechnology Center, National Chung Hsing University, Taichung, 402, Taiwan
- Department of Plant Pathology, National Chung Hsing University, Taichung, 402, Taiwan
| | - Hsiang-Ting Lee
- Institute of Molecular Biology, Academia Sinica, Nankang, Taipei, 115, Taiwan
- Molecular and Cell Biology, Taiwan International Graduate Program, Academia Sinica and National Defense Medical Center, Taipei, Taiwan
| | - Shuen-Fang Lo
- Biotechnology Center, National Chung Hsing University, Taichung, 402, Taiwan
| | - Tuan-Hua David Ho
- Biotechnology Center, National Chung Hsing University, Taichung, 402, Taiwan
- Institute of Plant and Microbial Biology, Academia Sinica, Nankang, Taipei, 115, Taiwan
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11
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The Molecular Regulatory Pathways and Metabolic Adaptation in the Seed Germination and Early Seedling Growth of Rice in Response to Low O 2 Stress. PLANTS 2020; 9:plants9101363. [PMID: 33066550 PMCID: PMC7602250 DOI: 10.3390/plants9101363] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 09/29/2020] [Accepted: 10/12/2020] [Indexed: 11/17/2022]
Abstract
As sessile organisms, flooding/submergence is one of the major abiotic stresses for higher plants, with deleterious effects on their growth and survival. Therefore, flooding/submergence is a large challenge for agriculture in lowland areas worldwide. Long-term flooding/submergence can cause severe hypoxia stress to crop plants and can result in substantial yield loss. Rice has evolved distinct adaptive strategies in response to low oxygen (O2) stress caused by flooding/submergence circumstances. Recently, direct seeding practice has been increasing in popularity due to its advantages of reducing cultivation cost and labor. However, establishment and growth of the seedlings from seed germination under the submergence condition are large obstacles for rice in direct seeding practice. The physiological and molecular regulatory mechanisms underlying tolerant and sensitive phenotypes in rice have been extensively investigated. Here, this review focuses on the progress of recent advances in the studies of the molecular mechanisms and metabolic adaptions underlying anaerobic germination (AG) and coleoptile elongation. Further, we highlight the prospect of introducing quantitative trait loci (QTL) for AG into rice mega varieties to ensure the compatibility of flooding/submergence tolerance traits and yield stability, thereby advancing the direct seeding practice and facilitating future breeding improvement.
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12
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Molecular Mechanisms Supporting Rice Germination and Coleoptile Elongation under Low Oxygen. PLANTS 2020; 9:plants9081037. [PMID: 32824201 PMCID: PMC7465159 DOI: 10.3390/plants9081037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 08/09/2020] [Accepted: 08/10/2020] [Indexed: 12/28/2022]
Abstract
Rice germinates under submergence by exploiting the starch available in the endosperm and translocating sugars from source to sink organs. The availability of fermentable sugar under water allows germination with the protrusion of the coleoptile, which elongates rapidly and functions as a snorkel toward the air above. Depending on the variety, rice can produce a short or a long coleoptile. Longer length entails the involvement of a functional transport of auxin along the coleoptile. This paper is an overview of rice coleoptiles and the studies undertaken to understand its functioning and role under submergence.
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Li QF, Zhou Y, Xiong M, Ren XY, Han L, Wang JD, Zhang CQ, Fan XL, Liu QQ. Gibberellin recovers seed germination in rice with impaired brassinosteroid signalling. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2020; 293:110435. [PMID: 32081273 DOI: 10.1016/j.plantsci.2020.110435] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2019] [Revised: 01/26/2020] [Accepted: 02/01/2020] [Indexed: 05/25/2023]
Abstract
Seed germination is essential for ensuring grain yield and quality. Germination rate, uniformity, and post-germination growth all contribute to cultivation. Although the phytohormones gibberellin (GA) and brassinosteroid (BR) are known to regulate germination, the underlying mechanism of their crosstalk in co-regulating rice seed germination remains unclear. In this study, the isobaric tags for relative and absolute quantitation (iTRAQ) proteomic approach was employed to identify target proteins responsive to GA during recovery of germination in BR-deficient and BR-insensitive rice. A total of 42 differentially abundant proteins were identified in both BR-deficient and BR-insensitive plants, and most were altered consistently in the two groups. Gene Ontology (GO) analysis revealed enrichment in proteins with binding and catalytic activity. A potential protein-protein interaction network was constructed using STRING analysis, and five Late Embryogenesis Abundant (LEA) family members were markedly down-regulated at both mRNA transcript and protein levels. These LEA genes were specifically expressed in rice seeds, especially during the latter stages of seed development. Mutation of LEA33 affected rice grain size and seed germination, possibly by reducing BR accumulation and enhancing GA biosynthesis. The findings improve our knowledge of the mechanisms by which GA and BR coordinate seed germination.
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Affiliation(s)
- Qian-Feng Li
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province, Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
| | - Yu Zhou
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Min Xiong
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Xin-Yu Ren
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Li Han
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Jin-Dong Wang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China
| | - Chang-Quan Zhang
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province, Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Xiao-Lei Fan
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province, Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China
| | - Qiao-Quan Liu
- Key Laboratory of Crop Genetics and Physiology of Jiangsu Province, Key Laboratory of Plant Functional Genomics of the Ministry of Education, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, College of Agriculture, Yangzhou University, Yangzhou, 225009, China; Co-Innovation Center for Modern Production Technology of Grain Crops of Jiangsu Province, Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education, Yangzhou University, Yangzhou, 225009, China.
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14
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Sano N, Takebayashi Y, To A, Mhiri C, Rajjou LC, Nakagami H, Kanekatsu M. Shotgun Proteomic Analysis Highlights the Roles of Long-Lived mRNAs and De Novo Transcribed mRNAs in Rice Seeds upon Imbibition. PLANT & CELL PHYSIOLOGY 2019; 60:2584-2596. [PMID: 31373371 DOI: 10.1093/pcp/pcz152] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 07/27/2019] [Indexed: 05/22/2023]
Abstract
During seed germination, proteins are translated not only from mRNAs newly transcribed upon imbibition but also from long-lived mRNAs that are synthesized during seed maturation and stored in the mature dry seeds. To clarify the distinct roles of proteins translated from long-lived mRNAs and de novo transcribed mRNAs in germinating rice embryos, proteome analysis based on liquid chromatography-tandem mass spectrometry (LC-MS/MS) combining the use of a transcriptional inhibitor was performed. We observed that α-amanitin significantly represses transcription in germinating embryos; nevertheless, the embryos could germinate, albeit slowly. The proteomic analysis revealed that a total of 109 proteins were translated from long-lived mRNAs associated with germination as well as 222 proteins whose expression were dependent on de novo transcription upon imbibition. Transcriptomic datasets available in public databases demonstrated that mRNAs of the 222 proteins notably increased during germination while those of the 109 proteins highly accumulated in dry embryos and constitutively expressed upon imbibition. Gene Ontology enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis indicated that many of the 109 proteins from long-lived mRNAs are implicated in energy production such as glycolysis or annotated as nucleotide binding proteins, while the 222 proteins are involved in pathways such as pyruvate metabolism and TCA cycle following glycolysis, and momilactones biosynthesis. We propose that long-lived mRNAs support initial energy production and activation of translational machinery upon imbibition whereas de novo transcription accelerates the energy production after glycolysis, which enables rice seeds to germinate vigorously.
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Affiliation(s)
- Naoto Sano
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Universit� Paris-Saclay, Versailles, France
| | - Yumiko Takebayashi
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
| | - Alexandra To
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Universit� Paris-Saclay, Versailles, France
| | - Corinne Mhiri
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Universit� Paris-Saclay, Versailles, France
| | - Loï C Rajjou
- Institut Jean-Pierre Bourgin, INRA, AgroParisTech, CNRS, Universit� Paris-Saclay, Versailles, France
| | - Hirofumi Nakagami
- RIKEN Center for Sustainable Resource Science, Yokohama, Kanagawa, Japan
- Max Planck Institute for Plant Breeding Research, Carl-von-Linne-Weg 10, Cologne, Germany
| | - Motoki Kanekatsu
- Department of Plant Production, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
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15
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Nghi KN, Tondelli A, Valè G, Tagliani A, Marè C, Perata P, Pucciariello C. Dissection of coleoptile elongation in japonica rice under submergence through integrated genome-wide association mapping and transcriptional analyses. PLANT, CELL & ENVIRONMENT 2019; 42:1832-1846. [PMID: 30802973 DOI: 10.1111/pce.13540] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 05/23/2023]
Abstract
Rice is unique among cereals for its ability to germinate not only when submerged but also under anoxic conditions. Rice germination under submergence or anoxia is characterized by a longer coleoptile and delay in radicle emergence. A panel of temperate and tropical japonica rice accessions showing a large variability in coleoptile length was used to investigate genetic factors involved in this developmental process. The ability of the Khao Hlan On rice landrace to vigorously germinate when submerged has been previously associated with the presence of the trehalose 6 phosphate phosphatase 7 (TPP7) gene. In this study, we found that, in the presence of TPP7, polymorphisms and transcriptional variations of the gene in coleoptile tissue were not related to differences in the final coleoptile length under submergence. In order to find new chromosomal regions associated with the different ability of rice to elongate the coleoptile under submergence, we used genome-wide association study analysis on a panel of 273 japonica rice accessions. We discovered 11 significant marker-trait associations and identified candidate genes potentially involved in coleoptile length. Candidate gene expression analyses indicated that japonica rice genotypes possess complex genetic elements that control final coleoptile length under low oxygen.
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Affiliation(s)
- Khac Nhu Nghi
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Alessandro Tondelli
- Council for Agricultural Research and Economics (CREA), Research Centre for Genomics and Bioinformatics, Fiorenzuola d'Arda, Italy
| | - Giampiero Valè
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Vercelli, Italy
| | - Andrea Tagliani
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Caterina Marè
- Council for Agricultural Research and Economics (CREA), Research Centre for Genomics and Bioinformatics, Fiorenzuola d'Arda, Italy
| | - Pierdomenico Perata
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Chiara Pucciariello
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
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16
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Song Y, Liu L, Ma X. CbADH1 improves plant cold tolerance. PLANT SIGNALING & BEHAVIOR 2019; 14:1612680. [PMID: 31056000 PMCID: PMC6620001 DOI: 10.1080/15592324.2019.1612680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 05/21/2023]
Abstract
ADH1 (alcohol dehydrogenase 1) was involved in plant growth and development and responded to various stresses. We published a cold-induced alcohol dehydrogenase 1 gene from C. bungeana, CbADH1, which exists 43 unique amino acids. Here, we confirmed that overexpression of CbADH1 in Arabidopsis and tobacco significantly improved cold shock tolerance through electrolyte leakage, semi-lethal temperature, phenotypic and survival analysis. These results indicate that CbADH1 is the candidate gene to improve the ability of plant freezing resistance, and it has great application value.
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Affiliation(s)
- Yuan Song
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Lijun Liu
- Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Xiang Ma
- Qinghai Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining, China
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17
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Miro B, Longkumer T, Entila FD, Kohli A, Ismail AM. Rice Seed Germination Underwater: Morpho-Physiological Responses and the Bases of Differential Expression of Alcoholic Fermentation Enzymes. FRONTIERS IN PLANT SCIENCE 2017; 8:1857. [PMID: 29123541 PMCID: PMC5662645 DOI: 10.3389/fpls.2017.01857] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 10/11/2017] [Indexed: 05/05/2023]
Abstract
The water-, energy-, and labor-intensive system of transplanted puddled rice (Oryza sativa) is steadily being replaced by direct seeding due to the progressive scarcity of these resources. However, the alternate dry direct seeding leads to competition with weeds and poor establishment when soils are flooded. Direct seeded rice capable of anaerobic germination (germination in flooded soil, AG) is ideal, which under rainfed ecosystems would also overcome waterlogging during germination. AG tolerance is associated with faster germination and faster elongation of coleoptiles, with the activities of alcoholic fermentation enzymes replacing aerobic respiration as a source of energy. To better understand the variability in the morpho-physiological responses and in the nature of the alcoholic fermentation enzymes during AG, 21 rice genotypes were studied. The genotypes Khao Hlan On (KHO) and IR42 were used as the tolerant and susceptible checks, respectively. KHO exhibited faster germination, with 82.5% of the coleoptiles emerging out of 10 cm of water within 8 days, whereas IR42 exhibited 20% germination and limited coleoptile growth. Among the test genotypes, four performed well, including two that are drought tolerant. Increased content and activity of the alcoholic fermentation enzymes, alcohol dehydrogenase (ADH1) and acetaldehyde dehydrogenase (ALDH2a and ALDH2b), was noted in KHO under anaerobic than under aerobic conditions and also in comparison with IR42 under AG. Gene transcripts for these enzymes were also more in KHO undergoing AG. However, no major differences were observed between KHO and IR42 in the critical cis-acting regulatory elements, such as the auxin, light, and sugar response elements, in the promoters of ADH1, ALDH2a, and ALDH2b genes. Post-transcriptional and post-translational regulatory mechanisms were implicated for the increased transcript and protein content/activity of the enzymes in KHO by observing four different transcripts of ALDH2a and a unique non-glycosylated form of ADH1 under AG. IR42 lacked the non-glycosylated ADH1 and contained only a truncated form of ALDH2a, which lacked the active site. Additionally, KHO exhibited increased activity and more isoforms for reactive oxygen species detoxifying enzymes under AG compared to IR42. These results highlight the need for a deeper functional understanding of the critical enzymes involved in AG.
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Affiliation(s)
| | | | | | - Ajay Kohli
- Genetics and Biotechnology Division, International Rice Research Institute, Makati, Philippines
| | - Abdelbagi M. Ismail
- Genetics and Biotechnology Division, International Rice Research Institute, Makati, Philippines
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18
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Differential expression by chromatin modifications of alcohol dehydrogenase 1 of Chorispora bungeana in cold stress. Gene 2017; 636:1-16. [PMID: 28912063 DOI: 10.1016/j.gene.2017.09.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 09/03/2017] [Accepted: 09/08/2017] [Indexed: 12/18/2022]
Abstract
Epigenetic modifications regulate plant genes to cope with a variety of environmental stresses. Chorispora bungeana is an alpine subnival plant with strong tolerance to multiple abiotic stresses, especially cold stress. In this study, we characterized the alcohol dehydrogenase 1 gene from Chorispora bungeana, CbADH1, that is up-regulated in cold conditions. Overexpression of CbADH1 in Arabidopsis thaliana improved cold tolerance, as indicated by a decreased lethal temperature (LT50). Chromatin immunoprecipitation assays showed that histone H3 is removed from the promoter region and the middle-coding region of the gene. H3K9 acetylation and H3K4 trimethylation increased throughout the gene and in the proximal promoter region, respectively. Moreover, increased Ser5P and Ser2P polymerase II accumulation further indicated changes in the transcription initiation and elongation of CbADH1 were due to the cold stress. Taken together, our results suggested that CbADH1 is highly expressed during cold stress, and is regulated by epigenetic modifications. This study expands our understanding of the regulation of gene expression by epigenetic modifications in response to environmental cues.
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19
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Singh A, Septiningsih EM, Balyan HS, Singh NK, Rai V. Genetics, Physiological Mechanisms and Breeding of Flood-Tolerant Rice (Oryza sativa L.). PLANT & CELL PHYSIOLOGY 2017; 58:185-197. [PMID: 28069894 DOI: 10.1093/pcp/pcw206] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 11/17/2016] [Indexed: 06/06/2023]
Abstract
Flooding of rice fields is a serious problem in the river basins of South and South-East Asia where about 15 Mha of lowland rice cultivation is regularly affected. Flooding creates hypoxic conditions resulting in poor germination and seedling establishment. Flash flooding, where rice plants are completely submerged for 10-15 d during their vegetative stage, causes huge losses. Water stagnation for weeks to months also leads to substantial yield losses when large parts of rice aerial tissues are inundated. The low-yielding traditional varieties and landraces of rice adapted to these flooding conditions have been replaced by flood-sensitive high-yielding rice varieties. The 'FR13A' rice variety and the Submergence 1A (SUB1A) gene were identified for flash flooding and subsequently introgressed to high-yielding rice varieties. The challenge is to find superior alleles of the SUB1A gene, or even new genes that may confer greater tolerance to submergence. Similarly, genes have been identified in tolerant landraces of rice for their ability to survive by rapid stem elongation (SNORKEL1 and SNORKEL2) during deep-water flooding, and for anaerobic germination ability (TPP7). Research on rice genotypes and novel genes that are tolerant to prolonged water stagnation is in progress. These studies will greatly assist in devising more efficient and precise molecular breeding strategies for developing climate-resilient high-yielding rice varieties for flood-prone regions. Here we review the state of our knowledge of flooding tolerance in rice and its application in varietal improvement.
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Affiliation(s)
- Anuradha Singh
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
- Department of Genetics and Plant Breeding, Ch. Charan Singh University, Meerut, India
| | - Endang M Septiningsih
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
- International Rice Research Institute, DAPO, Metro Manila, Philippines
| | - Harendra S Balyan
- International Rice Research Institute, DAPO, Metro Manila, Philippines
| | - Nagendra K Singh
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - Vandna Rai
- National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
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20
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Narsai R, Secco D, Schultz MD, Ecker JR, Lister R, Whelan J. Dynamic and rapid changes in the transcriptome and epigenome during germination and in developing rice (Oryza sativa) coleoptiles under anoxia and re-oxygenation. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2017; 89:805-824. [PMID: 27859855 DOI: 10.1111/tpj.13418] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 10/19/2016] [Accepted: 10/28/2016] [Indexed: 05/20/2023]
Abstract
Detailed molecular profiling of Oryza sativa (rice) was carried out to uncover the features that are essential for germination and early seedling growth under anoxic conditions. Temporal analysis of the transcriptome and methylome from germination to young seedlings under aerobic and anaerobic conditions revealed 82% similarity in the transcriptome and no differences in the epigenome up to 24 h. Following germination, significant changes in the transcriptome and DNA methylation were observed between 4-day aerobically and anaerobically grown coleoptiles. A link between the epigenomic state and cell division versus cell elongation is suggested, as no differences in DNA methylation were observed between 24-h aerobically and anaerobically germinating embryos, when there is little cell division. After that, epigenetic changes appear to correlate with differences between cell elongation (anaerobic conditions) versus cell division (aerobic conditions) in the coleoptiles. Re-oxygenation of 3-day anaerobically grown seedlings resulted in rapid transcriptomic changes in DNA methylation in these coleoptiles. Unlike the transcriptome, changes in DNA methylation upon re-oxygenation did not reflect those seen in aerobic coleoptiles, but instead, reverted to a pattern similar to dry seeds. Reversion to the 'dry seed' state of DNA methylation upon re-oxygenation may act to 'reset the clock' for the rapid molecular changes and cell division that result upon re-oxygenation.
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Affiliation(s)
- Reena Narsai
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, School of Life Science, La Trobe University, Melbourne, Vic, 3086, Australia
| | - David Secco
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, Perth, WA, 6009, Australia
| | - Matthew D Schultz
- Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
| | - Joseph R Ecker
- Genomic Analysis Laboratory, The Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
- Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, CA, 92037, USA
| | - Ryan Lister
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, Perth, WA, 6009, Australia
| | - James Whelan
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, School of Life Science, La Trobe University, Melbourne, Vic, 3086, Australia
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21
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Mohanty B, Takahashi H, de los Reyes BG, Wijaya E, Nakazono M, Lee DY. Transcriptional regulatory mechanism of alcohol dehydrogenase 1-deficient mutant of rice for cell survival under complete submergence. RICE (NEW YORK, N.Y.) 2016; 9:51. [PMID: 27681580 PMCID: PMC5040660 DOI: 10.1186/s12284-016-0124-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 09/22/2016] [Indexed: 05/22/2023]
Abstract
BACKGROUND Rice is the only crop that germinates and elongates the coleoptile under complete submergence. It has been shown that alcohol dehydrogenase 1 (ADH1)-deficient mutant of rice with reduced alcohol dehydrogenase activity (rad) and reduced ATP level, is viable with much reduced coleoptile elongation under such condition. To understand the altered transcriptional regulatory mechanism of this mutant, we aimed to establish possible relationships between gene expression and cis-regulatory information content. FINDINGS We performed promoter analysis of the publicly available differentially expressed genes in ADH1 mutant. Our results revealed that a crosstalk between a number of key transcription factors (TFs) and different phytohormones altered transcriptional regulation leading to the survival of the mutant. Amongst the key TFs identified, we suggest potential involvement of MYB, bZIP, ARF and ERF as transcriptional activators and WRKY, ABI4 and MYC as transcriptional repressors of coleoptile elongation to maintain metabolite levels for the cell viability. Out of the repressors, WRKY TF is most likely playing a major role in the alteration of the physiological implications associated with the cell survival. CONCLUSIONS Overall, our analysis provides a possible transcriptional regulatory mechanism underlying the survival of the rad mutant under complete submergence in an energy crisis condition and develops hypotheses for further experimental validation.
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Affiliation(s)
- Bijayalaxmi Mohanty
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585 Singapore
| | - Hirokazu Takahashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601 Japan
| | - Benildo G. de los Reyes
- Department of Plant and Soil Science, Texas Tech University, Box 42122, Lubbock, TX 79409-2122 USA
| | - Edward Wijaya
- IFReC, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871 Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8601 Japan
| | - Dong-Yup Lee
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585 Singapore
- Bioprocessing Technology Institute, 20 Biopolis Way, Centros, Singapore, 138668 Singapore
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22
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Hussain S, Yin H, Peng S, Khan FA, Khan F, Sameeullah M, Hussain HA, Huang J, Cui K, Nie L. Comparative Transcriptional Profiling of Primed and Non-primed Rice Seedlings under Submergence Stress. FRONTIERS IN PLANT SCIENCE 2016; 7:1125. [PMID: 27516766 PMCID: PMC4964843 DOI: 10.3389/fpls.2016.01125] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/14/2016] [Indexed: 05/08/2023]
Abstract
Submergence stress is a limiting factor for direct-seeded rice systems in rainfed lowlands and flood-prone areas of South and Southeast Asia. The present study demonstrated that submergence stress severely hampered the germination and seedling growth of rice, however, seed priming alleviated the detrimental effects of submergence stress. To elucidate the molecular basis of seed priming-induced submergence tolerance, transcriptome analyses were performed using 4-day-old primed (selenium-Se and salicylic acid-SA priming) and non-primed rice seedlings under submergence stress. Genomewide transcriptomic profiling identified 2371 and 2405 transcripts with Se- and SA-priming, respectively, that were differentially expressed in rice compared with non-priming treatment under submergence. Pathway and gene ontology term enrichment analyses revealed that genes involved in regulation of secondary metabolism, development, cell, transport, protein, and metal handling were over-represented after Se- or SA-priming. These coordinated factors might have enhanced the submergence tolerance and maintained the better germination and vigorous seedling growth of primed rice seedlings. It was also found that many genes involved in cellular and metabolic processes such as carbohydrate metabolism, cellular, and metabolic biosynthesis, nitrogen compound metabolic process, transcription, and response to oxidative stress were induced and overlapped in seed priming treatments, a finding which reveals the common mechanism of seed priming-induced submergence tolerance. Taken together, these results may provide new avenues for understanding and advancing priming-induced responses to submergence tolerance in crop plants.
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Affiliation(s)
- Saddam Hussain
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
- College of Resources and Environment, Huazhong Agricultural UniversityWuhan, China
| | - Hanqi Yin
- Shanghai Biotechnology CorporationShanghai, China
| | - Shaobing Peng
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
| | - Faheem A. Khan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Huazhong Agricultural UniversityWuhan, China
| | - Fahad Khan
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
- College of Resources and Environment, Huazhong Agricultural UniversityWuhan, China
| | - Muhammad Sameeullah
- Faculty of Agriculture and Natural Sciences, Abant Izzet Baysal UniversityBolu, Turkey
| | - Hafiz A. Hussain
- Department of Agronomy, University of AgricultureFaisalabad, Pakistan
| | - Jianliang Huang
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
| | - Kehui Cui
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
| | - Lixiao Nie
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China
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23
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Hussain S, Yin H, Peng S, Khan FA, Khan F, Sameeullah M, Hussain HA, Huang J, Cui K, Nie L. Comparative Transcriptional Profiling of Primed and Non-primed Rice Seedlings under Submergence Stress. FRONTIERS IN PLANT SCIENCE 2016; 7:1125. [PMID: 27516766 DOI: 10.3389/fpls.2016.01125/bibtex] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Accepted: 07/14/2016] [Indexed: 05/25/2023]
Abstract
Submergence stress is a limiting factor for direct-seeded rice systems in rainfed lowlands and flood-prone areas of South and Southeast Asia. The present study demonstrated that submergence stress severely hampered the germination and seedling growth of rice, however, seed priming alleviated the detrimental effects of submergence stress. To elucidate the molecular basis of seed priming-induced submergence tolerance, transcriptome analyses were performed using 4-day-old primed (selenium-Se and salicylic acid-SA priming) and non-primed rice seedlings under submergence stress. Genomewide transcriptomic profiling identified 2371 and 2405 transcripts with Se- and SA-priming, respectively, that were differentially expressed in rice compared with non-priming treatment under submergence. Pathway and gene ontology term enrichment analyses revealed that genes involved in regulation of secondary metabolism, development, cell, transport, protein, and metal handling were over-represented after Se- or SA-priming. These coordinated factors might have enhanced the submergence tolerance and maintained the better germination and vigorous seedling growth of primed rice seedlings. It was also found that many genes involved in cellular and metabolic processes such as carbohydrate metabolism, cellular, and metabolic biosynthesis, nitrogen compound metabolic process, transcription, and response to oxidative stress were induced and overlapped in seed priming treatments, a finding which reveals the common mechanism of seed priming-induced submergence tolerance. Taken together, these results may provide new avenues for understanding and advancing priming-induced responses to submergence tolerance in crop plants.
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Affiliation(s)
- Saddam Hussain
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China; College of Resources and Environment, Huazhong Agricultural UniversityWuhan, China
| | - Hanqi Yin
- Shanghai Biotechnology Corporation Shanghai, China
| | - Shaobing Peng
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Faheem A Khan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction, Huazhong Agricultural University Wuhan, China
| | - Fahad Khan
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural UniversityWuhan, China; College of Resources and Environment, Huazhong Agricultural UniversityWuhan, China
| | - Muhammad Sameeullah
- Faculty of Agriculture and Natural Sciences, Abant Izzet Baysal University Bolu, Turkey
| | - Hafiz A Hussain
- Department of Agronomy, University of Agriculture Faisalabad, Pakistan
| | - Jianliang Huang
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Kehui Cui
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
| | - Lixiao Nie
- National Key Laboratory of Crop Genetic Improvement, MOA Key Laboratory of Crop Ecophysiology and Farming System in the Middle Reaches of the Yangtze River, College of Plant Science and Technology, Huazhong Agricultural University Wuhan, China
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Mustafiz A, Kumari S, Karan R. Ascribing Functions to Genes: Journey Towards Genetic Improvement of Rice Via Functional Genomics. Curr Genomics 2016; 17:155-76. [PMID: 27252584 PMCID: PMC4869004 DOI: 10.2174/1389202917666160202215135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Revised: 07/01/2015] [Accepted: 07/06/2015] [Indexed: 11/22/2022] Open
Abstract
Rice, one of the most important cereal crops for mankind, feeds more than half the world population. Rice has been heralded as a model cereal owing to its small genome size, amenability to easy transformation, high synteny to other cereal crops and availability of complete genome sequence. Moreover, sequence wealth in rice is getting more refined and precise due to resequencing efforts. This humungous resource of sequence data has confronted research fraternity with a herculean challenge as well as an excellent opportunity to functionally validate expressed as well as regulatory portions of the genome. This will not only help us in understanding the genetic basis of plant architecture and physiology but would also steer us towards developing improved cultivars. No single technique can achieve such a mammoth task. Functional genomics through its diverse tools viz. loss and gain of function mutants, multifarious omics strategies like transcriptomics, proteomics, metabolomics and phenomics provide us with the necessary handle. A paradigm shift in technological advances in functional genomics strategies has been instrumental in generating considerable amount of information w.r.t functionality of rice genome. We now have several databases and online resources for functionally validated genes but despite that we are far from reaching the desired milestone of functionally characterizing each and every rice gene. There is an urgent need for a common platform, for information already available in rice, and collaborative efforts between researchers in a concerted manner as well as healthy public-private partnership, for genetic improvement of rice crop better able to handle the pressures of climate change and exponentially increasing population.
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Affiliation(s)
- Ananda Mustafiz
- South Asian University, Akbar Bhawan, Chanakyapuri, New Delhi
| | - Sumita Kumari
- Sher-e-Kashmir University of Agriculture Sciences and Technology, Jammu 180009, India
| | - Ratna Karan
- Agronomy Department, Institute of Food and Agricultural Sciences, University of Florida, Gainesville - 32611, Florida, USA
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Gupta KJ, Igamberdiev AU. Reactive Nitrogen Species in Mitochondria and Their Implications in Plant Energy Status and Hypoxic Stress Tolerance. FRONTIERS IN PLANT SCIENCE 2016; 7:369. [PMID: 27047533 PMCID: PMC4806263 DOI: 10.3389/fpls.2016.00369] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/10/2016] [Indexed: 05/19/2023]
Abstract
Hypoxic and anoxic conditions result in the energy crisis that leads to cell damage. Since mitochondria are the primary organelles for energy production, the support of these organelles in a functional state is an important task during oxygen deprivation. Plant mitochondria adapted the strategy to survive under hypoxia by keeping electron transport operative even without oxygen via the use of nitrite as a terminal electrons acceptor. The process of nitrite reduction to nitric oxide (NO) in the mitochondrial electron transport chain recycles NADH and leads to a limited rate of ATP production. The produced ATP alongside with the ATP generated by fermentation supports the processes of transcription and translation required for hypoxic survival and recovery of plants. Non-symbiotic hemoglobins (called phytoglobins in plants) scavenge NO and thus contribute to regeneration of NAD(+) and nitrate required for the operation of anaerobic energy metabolism. This overall operation represents an important strategy of biochemical adaptation that results in the improvement of energy status and thereby in protection of plants in the conditions of hypoxic stress.
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Affiliation(s)
- Kapuganti Jagadis Gupta
- National Institute of Plant Genome ResearchNew Delhi, India
- *Correspondence: Kapuganti J. Gupta,
| | - Abir U. Igamberdiev
- Department of Biology, Memorial University of Newfoundland, St. John’sNL, Canada
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Narsai R, Edwards JM, Roberts TH, Whelan J, Joss GH, Atwell BJ. Mechanisms of growth and patterns of gene expression in oxygen-deprived rice coleoptiles. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 82:25-40. [PMID: 25650041 DOI: 10.1111/tpj.12786] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2014] [Revised: 01/21/2015] [Accepted: 01/22/2015] [Indexed: 05/04/2023]
Abstract
Coleoptiles of rice (Oryza sativa) seedlings grown under water commonly elongate by up to 1 mm h(-1) to reach the atmosphere. We initially analysed this highly specialized phenomenon by measuring epidermal cell lengths along the coleoptile axis to determine elongation rates. This revealed a cohort of cells in the basal zone that elongated rapidly following emergence from the embryo, reaching 200 μm within 12 h. After filming coleoptiles in vivo for a day, kinematic analysis was applied. Eight time-sliced 'segments' were defined by their emergence from the embryo at four-hourly intervals, revealing a mathematically simple growth model. Each segment entering the coleoptile from the embryo elongated at a constant velocity, resulting in accelerating growth for the entire organ. Consistent with the epidermal cell lengths, relative rates of elongation (mm mm(-1) h(-1)) were tenfold greater in the small, newly emerged basal segments than the older distal tip segments. This steep axial gradient defined two contrasting growth zones (bases versus tips) in which we measured ATP production and protein, RNA and DNA content, and analysed the global transcriptome under steady-state normoxia, hypoxia (3% O2) and anoxia. Determination of the transcriptome revealed tip-specific induction of genes encoding TCP [Teosinte Branched1 (Tb1) of maize, Cycloidea (Cyc), and Proliferating Cell Factor (Pcf)] transcription factors, RNA helicases, ribosomal proteins and proteins involved in protein folding, whilst expression of F-box domain-containing proteins in the ubiquitin E3-SCF complex (Skp, Cullin, F-box containing complex) was induced specifically in bases under low oxygen conditions. We ascribed the sustained elongation under hypoxia to hypoxia-specific responses such as controlled suppression of photosystem components and induction of RNA binding/splicing functions, indicating preferential allocation of energy to cell extension.
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Affiliation(s)
- Reena Narsai
- Department of Botany, School of Life Science, La Trobe University, Melbourne, Victoria, 3086, Australia
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27
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Shingaki-Wells R, Millar AH, Whelan J, Narsai R. What happens to plant mitochondria under low oxygen? An omics review of the responses to low oxygen and reoxygenation. PLANT, CELL & ENVIRONMENT 2014; 37:2260-77. [PMID: 24575773 DOI: 10.1111/pce.12312] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/09/2014] [Accepted: 02/16/2014] [Indexed: 05/19/2023]
Abstract
Floods can rapidly submerge plants, limiting oxygen to the extent that oxidative phosphorylation no longer generates adequate ATP supplies. Low-oxygen tolerant plants, such as rice, are able to adequately respond to low oxygen by successfully remodelling primary and mitochondrial metabolism to partially counteract the energy crisis that ensues. In this review, we discuss how plants respond to low-oxygen stress at the transcriptomic, proteomic, metabolomic and enzyme activity levels, particularly focusing on mitochondria and interacting pathways. The role of reactive oxygen species and nitrite as an alternative electron acceptor as well as their links to respiratory chain components is discussed. By making intra-kingdom as well as cross-kingdom comparisons, conserved mechanisms of anoxia tolerance are highlighted as well as tolerance mechanisms that are specific to anoxia-tolerant rice during germination and in coleoptiles. We discuss reoxygenation as an often overlooked, yet essential stage of this environmental stress and consider the possibility that changes occurring during low oxygen may also provide benefits upon re-aeration. Finally, we consider what it takes to be low-oxygen tolerant and argue that alternative mechanisms of ATP production, glucose signalling, starch/sucrose signalling as well as reverse metabolism of fermentation end products promote the survival of rice after this debilitating stress.
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Affiliation(s)
- Rachel Shingaki-Wells
- ARC Centre of Excellence in Plant Energy Biology, Bayliss Building University of Western Australia, Crawley, Western Australia, 6009, Australia
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28
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Takahashi H, Greenway H, Matsumura H, Tsutsumi N, Nakazono M. Rice alcohol dehydrogenase 1 promotes survival and has a major impact on carbohydrate metabolism in the embryo and endosperm when seeds are germinated in partially oxygenated water. ANNALS OF BOTANY 2014; 113:851-9. [PMID: 24431339 PMCID: PMC3962239 DOI: 10.1093/aob/mct305] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2013] [Accepted: 12/02/2013] [Indexed: 05/05/2023]
Abstract
BACKGROUND AND AIMS Rice (Oryza sativa) has the rare ability to germinate and elongate a coleoptile under oxygen-deficient conditions, which include both hypoxia and anoxia. It has previously been shown that ALCOHOL DEHYDROGENASE 1 (ADH1) is required for cell division and cell elongation in the coleoptile of submerged rice seedlings by means of studies using a rice ADH1-deficient mutant, reduced adh activity (rad). The aim of this study was to understand how low ADH1 in rice affects carbohydrate metabolism in the embryo and endosperm, and lactate and alanine synthesis in the embryo during germination and subsequent coleoptile growth in submerged seedlings. METHODS Wild-type and rad mutant rice seeds were germinated and grown under complete submergence. At 1, 3, 5 and 7 d after imbibition, the embryo and endosperm were separated and several of their metabolites were measured and compared. KEY RESULTS In the rad embryo, the rate of ethanol fermentation was halved, while lactate and alanine concentrations were 2·4- and 5·7- fold higher in the mutant than in the wild type. Glucose and fructose concentrations in the embryos increased with time in the wild type, but not in the rad mutant. The rad mutant endosperm had lower amounts of the α-amylases RAMY1A and RAMY3D, resulting in less starch degradation and lower glucose concentrations. CONCLUSIONS These results suggest that ADH1 is essential for sugar metabolism via glycolysis to ethanol fermentation in both the embryo and endosperm. In the endosperm, energy is presumably needed for synthesis of the amylases and for sucrose synthesis in the endosperm, as well as for sugar transport to the embryo.
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Affiliation(s)
- Hirokazu Takahashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
| | - Hank Greenway
- Faculty of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawly, Western Australia, 6009, Australia
| | - Hideo Matsumura
- Gene Research Center, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan
| | - Nobuhiro Tsutsumi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan
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29
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Biais B, Bénard C, Beauvoit B, Colombié S, Prodhomme D, Ménard G, Bernillon S, Gehl B, Gautier H, Ballias P, Mazat JP, Sweetlove L, Génard M, Gibon Y. Remarkable reproducibility of enzyme activity profiles in tomato fruits grown under contrasting environments provides a roadmap for studies of fruit metabolism. PLANT PHYSIOLOGY 2014; 164:1204-21. [PMID: 24474652 PMCID: PMC3938614 DOI: 10.1104/pp.113.231241] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 01/28/2014] [Indexed: 05/18/2023]
Abstract
To assess the influence of the environment on fruit metabolism, tomato (Solanum lycopersicum 'Moneymaker') plants were grown under contrasting conditions (optimal for commercial, water limited, or shaded production) and locations. Samples were harvested at nine stages of development, and 36 enzyme activities of central metabolism were measured as well as protein, starch, and major metabolites, such as hexoses, sucrose, organic acids, and amino acids. The most remarkable result was the high reproducibility of enzyme activities throughout development, irrespective of conditions or location. Hierarchical clustering of enzyme activities also revealed tight relationships between metabolic pathways and phases of development. Thus, cell division was characterized by high activities of fructokinase, glucokinase, pyruvate kinase, and tricarboxylic acid cycle enzymes, indicating ATP production as a priority, whereas cell expansion was characterized by enzymes involved in the lower part of glycolysis, suggesting a metabolic reprogramming to anaplerosis. As expected, enzymes involved in the accumulation of sugars, citrate, and glutamate were strongly increased during ripening. However, a group of enzymes involved in ATP production, which is probably fueled by starch degradation, was also increased. Metabolites levels seemed more sensitive than enzymes to the environment, although such differences tended to decrease at ripening. The integration of enzyme and metabolite data obtained under contrasting growth conditions using principal component analysis suggests that, with the exceptions of alanine amino transferase and glutamate and malate dehydrogenase and malate, there are no links between single enzyme activities and metabolite time courses or levels.
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Affiliation(s)
- Benoît Biais
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Camille Bénard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Bertrand Beauvoit
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Sophie Colombié
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Duyên Prodhomme
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Guillaume Ménard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Stéphane Bernillon
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Bernadette Gehl
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Hélène Gautier
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Patricia Ballias
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Jean-Pierre Mazat
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Lee Sweetlove
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
| | - Michel Génard
- Institut National de la Recherche Agronomique, Unité Mixte de Recherche 1332 Biologie du Fruit et Pathologie, F–33883 Villenave d’Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- University of Bordeaux, Département Sciences de la Vie et de la Santé, F–33076 Bordeaux cedex, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., J.-P.M., Y.G.)
- Plateforme Métabolome Bordeaux, Institut National de la Recherche Agronomique—Bordeaux, F–33883 Villenave d'Ornon, France (B.Bi., C.B., B.Be., S.C., D.P., G.M., S.B., P.B., Y.G.)
- Institut National de la Recherche Agronomique, Unité de Recherche 1115 Plantes et Systèmes de culture Horticoles, F–84914 Avignon cedex 9, France (C.B., H.G., M.G.); and
- Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (B.G., L.S.)
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Miro B, Ismail AM. Tolerance of anaerobic conditions caused by flooding during germination and early growth in rice (Oryza sativa L.). FRONTIERS IN PLANT SCIENCE 2013; 4:269. [PMID: 23888162 PMCID: PMC3719019 DOI: 10.3389/fpls.2013.00269] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 07/02/2013] [Indexed: 05/20/2023]
Abstract
Rice is semi-aquatic, adapted to a wide range of hydrologies, from aerobic soils in uplands to anaerobic and flooded fields in waterlogged lowlands, to even deeply submerged soils in flood-prone areas. Considerable diversity is present in native rice landraces selected by farmers over centuries. Our understanding of the adaptive features of these landraces to native ecosystems has improved considerably over the recent past. In some cases, major genes associated with tolerance have been cloned, such as SUB1A that confers tolerance of complete submergence and SNORKEL genes that control plant elongation to escape deepwater. Modern rice varieties are sensitive to flooding during germination and early growth, a problem commonly encountered in rainfed areas, but few landraces capable of germination under these conditions have recently been identified, enabling research into tolerance mechanisms. Major QTLs were also identified, and are being targeted for molecular breeding and for cloning. Nevertheless, limited progress has been made in identifying regulatory processes for traits that are unique to tolerant genotypes, including faster germination and coleoptile elongation, formation of roots and leaves under hypoxia, ability to catabolize starch into simple sugars for subsequent use in glycolysis and fermentative pathways to generate energy. Here we discuss the state of knowledge on the role of the PDC-ALDH-ACS bypass and the ALDH enzyme as the likely candidates effective in tolerant rice genotypes. Potential involvement of factors such as cytoplasmic pH regulation, phytohormones, reactive oxygen species scavenging and other metabolites is also discussed. Further characterization of contrasting genotypes would help in elucidating the genetic and biochemical regulatory and signaling mechanisms associated with tolerance. This could facilitate breeding rice varieties suitable for direct seeding systems and guide efforts for improving waterlogging tolerance in other crops.
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Affiliation(s)
| | - Abdelbagi M. Ismail
- Crop and Environmental Sciences Division, International Rice Research InstituteManila, Philippines
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