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Yamauchi T, Tanaka A, Nakazono M, Inukai Y. Age-dependent analysis dissects the stepwise control of auxin-mediated lateral root development in rice. PLANT PHYSIOLOGY 2024; 194:819-831. [PMID: 37831077 PMCID: PMC10828202 DOI: 10.1093/plphys/kiad548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 09/27/2023] [Accepted: 10/12/2023] [Indexed: 10/14/2023]
Abstract
As root elongation rates are different among each individual root, the distance from the root apices does not always reflect the age of root cells. Thus, methods for correcting variations in elongation rates are needed to accurately evaluate the root developmental process. Here, we show that modeling-based age-dependent analysis is effective for dissecting stepwise lateral root (LR) development in rice (Oryza sativa). First, we measured the increases in LR and LR primordium (LRP) numbers, diameters, and lengths in wild type and an auxin-signaling-defective mutant, which has a faster main (crown) root elongation rate caused by the mutation in the gene encoding AUXIN/INDOLE-3-ACETIC ACID protein 13 (IAA13). The longitudinal patterns of these parameters were fitted by the appropriate models and the age-dependent patterns were identified using the root elongation rates. As a result, we found that LR and LRP numbers and lengths were reduced in iaa13. We also found that the duration of the increases in LR and LRP diameters were prolonged in iaa13. Subsequent age-dependent comparisons with gene expression patterns suggest that AUXIN RESPONSE FACTOR11 (ARF11), the homolog of MONOPTEROS (MP)/ARF5 in Arabidopsis (Arabidopsis thaliana), is involved in the initiation and growth of LR(P). Indeed, the arf11 mutant showed a reduction of LR and LRP numbers and lengths. Our results also suggest that PINOID-dependent rootward-to-shootward shift of auxin flux contributes to the increase in LR and LRP diameters. Together, we propose that modeling-based age-dependent analysis is useful for root developmental studies by enabling accurate evaluation of root traits' expression.
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Affiliation(s)
- Takaki Yamauchi
- Bioscience and Biotechnology Center, Nagoya University, Nagoya 464-8601, Japan
| | - Akihiro Tanaka
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
- School of Agriculture and Environment, The University of Western Australia, Crawley, WA 6009, Australia
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya 464-8601, Japan
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2
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Tong S, Kjær JE, Peralta Ogorek LL, Pellegrini E, Song Z, Pedersen O, Herzog M. Responses of key root traits in the genus Oryza to soil flooding mimicked by stagnant, deoxygenated nutrient solution. JOURNAL OF EXPERIMENTAL BOTANY 2023; 74:2112-2126. [PMID: 36629284 PMCID: PMC10049916 DOI: 10.1093/jxb/erad014] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 01/09/2023] [Indexed: 05/25/2023]
Abstract
Excess water can induce flooding stress resulting in yield loss, even in wetland crops such as rice (Oryza). However, traits from species of wild Oryza have already been used to improve tolerance to abiotic stress in cultivated rice. This study aimed to establish root responses to sudden soil flooding among eight wild relatives of rice with different habitat preferences benchmarked against three genotypes of O. sativa. Plants were raised hydroponically, mimicking drained or flooded soils, to assess the plasticity of adventitious roots. Traits included were apparent permeance (PA) to O2 of the outer part of the roots, radial water loss, tissue porosity, apoplastic barriers in the exodermis, and root anatomical traits. These were analysed using a plasticity index and hierarchical clustering based on principal component analysis. For example, O. brachyantha, a wetland species, possessed very low tissue porosity compared with other wetland species, whereas dryland species O. latifolia and O. granulata exhibited significantly lower plasticity compared with wetland species and clustered in their own group. Most species clustered according to growing conditions based on PA, radial water loss, root porosity, and key anatomical traits, indicating strong anatomical and physiological responses to sudden soil flooding.
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Affiliation(s)
| | | | - Lucas León Peralta Ogorek
- Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, 2100 Copenhagen, Denmark
| | - Elisa Pellegrini
- Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, 2100 Copenhagen, Denmark
- Department of Agricultural, Food, Environmental and Animal Sciences, University of Udine, Via delle Scienze 206, 33100 Udine, Italy
| | - Zhiwei Song
- Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, 2100 Copenhagen, Denmark
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Ning J, Yamauchi T, Takahashi H, Omori F, Mano Y, Nakazono M. Asymmetric auxin distribution establishes a contrasting pattern of aerenchyma formation in the nodal roots of Zea nicaraguensis during gravistimulation. FRONTIERS IN PLANT SCIENCE 2023; 14:1133009. [PMID: 37152158 PMCID: PMC10154625 DOI: 10.3389/fpls.2023.1133009] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 03/28/2023] [Indexed: 05/09/2023]
Abstract
Auxin distribution is essential for determining root developmental patterns. The formation of lateral roots and constitutive aerenchyma, which is a gas space developed through cell death, is regulated by auxin in rice (Oryza sativa). However, it is unclear whether the involvement of auxin in constitutive aerenchyma formation is conserved in other species. In this study, we found that constitutive aerenchyma formation was regulated by auxin in the nodal roots of Zea nicaraguensis, a wild relative of maize (Zea mays ssp. mays) grown naturally on frequently flooded coastal plains. Subsequent gravistimulation (root rotation) experiments showed opposite patterns of aerenchyma and lateral root formation. Lateral root formation on the convex side of rotated roots is known to be stimulated by a transient increase in auxin level in the pericycle. We found that aerenchyma formation was accelerated in the cortex on the concave side of the rotated nodal roots of Z. nicaraguensis. A cortex-specific expression analysis of auxin-responsive genes suggested that the auxin level was higher on the concave side than on the convex side. These results suggest that asymmetric auxin distribution underlies the regulation of aerenchyma and lateral root formation in the nodal roots of Z. nicaraguensis. As aerenchyma reduces the respiratory cost of the roots, constitutive aerenchyma on the concave side of the nodal root may balance resource allocation, thereby contributing to the uptake of water and nutrients by newly formed lateral roots. Our study provides insights into auxin-dependent asymmetric root patterning such as that of gravistimulation and hydropatterning response.
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Affiliation(s)
- Jiayang Ning
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, Japan
| | - Takaki Yamauchi
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, Aichi, Japan
| | - Hirokazu Takahashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, Japan
| | - Fumie Omori
- Division of Feed and Livestock Research, National Agriculture and Food Research Organization (NARO) Institute of Livestock and Grassland Science, Nasushiobara, Tochigi, Japan
| | - Yoshiro Mano
- Division of Feed and Livestock Research, National Agriculture and Food Research Organization (NARO) Institute of Livestock and Grassland Science, Nasushiobara, Tochigi, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi, Japan
- The University of Western Australia (UWA) School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
- *Correspondence: Mikio Nakazono,
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Yamauchi T, Nakazono M. Modeling-based age-dependent analysis reveals the net patterns of ethylene-dependent and -independent aerenchyma formation in rice and maize roots. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 321:111340. [PMID: 35696932 DOI: 10.1016/j.plantsci.2022.111340] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/16/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Plants require oxygen for the functioning of roots, and thus the establishment of a long-distance diffusion path from above-water tissues to the submerged roots is essential to survive flooding. Rice (Oryza sativa) constitutively forms aerenchyma (gas spaces) under aerobic conditions, and induces its formation in response to low-oxygen conditions. Constitutive aerenchyma formation in rice roots is regulated by the phytohormone auxin, whereas ethylene stimulates inducible aerenchyma formation. However, the net patterns of the ethylene-dependent and -independent (auxin-dependent) aerenchyma formation remain unclear. In the present study, we used a modeling approach to determine age-dependent aerenchyma formation in the wild-type rice and reduced culm number 1 mutant, in which ethylene production is reduced, to reveal the net patterns of ethylene-dependent and -independent aerenchyma formation. Subsequent comparison of age-dependent aerenchyma formation between rice and maize roots suggested that more rapid induction of ethylene-dependent aerenchyma formation and more aerenchyma in rice roots are essential to achieve efficient oxygen diffusion under low-oxygen conditions. Moreover, rice roots showed rapid increase in the expression levels of ethylene biosynthesis and responsive genes, suggesting that the local ethylene production at an early time point after root-cell emergence contributes to the rapid induction of the ethylene-dependent aerenchyma formation in rice. DATA AVAILABILITY: All data included in this study are available upon request by contact with the corresponding author.
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Affiliation(s)
- Takaki Yamauchi
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, Aichi 464-8601, Japan.
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Aichi 464-8601, Japan; School of Agriculture and Environment, The University of Western Australia, Crawley, WA 6009, Australia
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Yamauchi T, Nakazono M. Mechanisms of lysigenous aerenchyma formation under abiotic stress. TRENDS IN PLANT SCIENCE 2022; 27:13-15. [PMID: 34810105 DOI: 10.1016/j.tplants.2021.10.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 05/25/2023]
Abstract
Lysigenous aerenchyma is a gas space created by cortical cell death that enables efficient oxygen diffusion within plants and reduces the energy costs associated with root cells. Recent studies have demonstrated the benefits of aerenchyma formation under flooding, drought, and nutrient deficiency, although further studies will be necessary to understand the mechanisms involved.
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Affiliation(s)
- Takaki Yamauchi
- Bioscience and Biotechnology Center, Nagoya University, Nagoya, Japan; Japan Science and Technology Agency, Precursory Research for Embryonic Science and Technology (PRESTO), Kawaguchi, Japan.
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan; School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, Australia.
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Shiono K, Yoshikawa M, Kreszies T, Yamada S, Hojo Y, Matsuura T, Mori IC, Schreiber L, Yoshioka T. Abscisic acid is required for exodermal suberization to form a barrier to radial oxygen loss in the adventitious roots of rice (Oryza sativa). THE NEW PHYTOLOGIST 2022; 233:655-669. [PMID: 34725822 DOI: 10.1111/nph.17751] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
To acclimate to waterlogged conditions, wetland plants form a barrier to radial oxygen loss (ROL) that can enhance oxygen transport to the root apex. We hypothesized that one or more hormones are involved in the induction of the barrier and searched for such hormones in rice. We previously identified 98 genes that were tissue-specifically upregulated during ROL barrier formation in rice. The RiceXPro database showed that most of these genes were highly enhanced by exogenous abscisic acid (ABA). We then examined the effect of ABA on ROL barrier formation by using an ABA biosynthesis inhibitor (fluridone, FLU), by applying exogenous ABA and by examining a mutant with a defective ABA biosynthesis gene (osaba1). FLU suppressed barrier formation in a stagnant solution that mimics waterlogged soil. Under aerobic conditions, rice does not naturally form a barrier, but 24 h of ABA treatment induced barrier formation. osaba1 did not form a barrier under stagnant conditions, but the application of ABA rescued the barrier. In parallel with ROL barrier formation, suberin lamellae formed in the exodermis. These findings strongly suggest that ABA is an inducer of suberin lamellae formation in the exodermis, resulting in an ROL barrier formation in rice.
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Affiliation(s)
- Katsuhiro Shiono
- Department of Bioscience and Biotechnology, Fukui Prefectural University, 4-1-1 Matsuoka-Kenjojima, Eiheiji, Fukui, 910-1195, Japan
| | - Marina Yoshikawa
- Department of Bioscience and Biotechnology, Fukui Prefectural University, 4-1-1 Matsuoka-Kenjojima, Eiheiji, Fukui, 910-1195, Japan
| | - Tino Kreszies
- Plant Nutrition and Crop Physiology, Department of Crop Science, University of Göttingen, Carl-Sprengel-Weg 1, Göttingen, 37075, Germany
| | - Sumiyo Yamada
- Department of Bioscience and Biotechnology, Fukui Prefectural University, 4-1-1 Matsuoka-Kenjojima, Eiheiji, Fukui, 910-1195, Japan
| | - Yuko Hojo
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki, Okayama, 710-0046, Japan
| | - Takakazu Matsuura
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki, Okayama, 710-0046, Japan
| | - Izumi C Mori
- Institute of Plant Science and Resources, Okayama University, 2-20-1 Chuo, Kurashiki, Okayama, 710-0046, Japan
| | - Lukas Schreiber
- Department of Ecophysiology, Institute of Cellular Botany, University of Bonn, Kirschallee 1, 53115, Germany
| | - Toshihito Yoshioka
- Faculty of Agro-Food Science, Niigata Agro-Food University, 2416 Hiranedai, Tainai, Niigata, 959-2702, Japan
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Chen Y, Li G, Zhao B, Zhang Y, Liu K, Nadeeshika Samarawickrama P, Wu X, Lv B, Liu L. Longitudinal Pattern of Aerenchyma Formation Using the Ti-Gompertz Model in Rice Adventitious Roots. FRONTIERS IN PLANT SCIENCE 2021; 12:776971. [PMID: 34917110 PMCID: PMC8669396 DOI: 10.3389/fpls.2021.776971] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 10/27/2021] [Indexed: 06/14/2023]
Abstract
The longitudinal pattern of root aerenchyma formation of its relationship with the function of adventitious roots in rice remains unclear. In this study, the percentage of the aerenchyma area to the cross-sectional area (i.e., aerenchyma percentage) was fit with four non-linear models, namely, W0-Gompertz, Ti-Gompertz, logistic, and von Bertalanffy. Goodness-of-fit criteria such as the R 2, the Akaike information criterion (AIC), and the Bayesian information criterion (BIC) were used to select the model. The bias of the parameters was evaluated using the difference between the ordinary least squares-based parameter estimates and the mean of 1,000 bootstrap-based parameter estimates and the symmetry of the distributions of these parameters. The results showed that the Ti-Gompertz model, which had a high goodness-of-fit with an R 2 close to 1, lower AIC and BIC values, parameter estimates close to being unbiased, and good linear approximation, provided the best fit for the longitude pattern of rice aerenchyma formation with different root lengths among the competing models. Using the second- and third-order derivatives according to the distance from the root apex, the critical points of Ti-Gompertz were calculated. The rapid stage for aerenchyma formation was from the maximum acceleration point (1.38-1.76 cm from the root apex) to the maximum deceleration point (3.13-4.19 cm from the root apex). In this stage, the aerenchyma percentage increased by 5.3-15.7% per cm, suggesting that the cortical cells tended to die rapidly for the aerenchyma formation rather than for the respiration cost during this stage. Meanwhile, the volume of the aerenchyma of the entire roots could be computed using the integral function of the Ti-Gompertz model. We proposed that the longitudinal pattern of root aerenchyma formation modeled by the Ti-Gompertz model helped to deeply understand the relationship between the anatomical traits and physiological function in rice adventitious roots.
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Affiliation(s)
- Yun Chen
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Guoming Li
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Buhong Zhao
- Lixiahe Agricultural Institute of Jiangsu Province, Yangzhou, China
| | - Yajun Zhang
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
| | - Kun Liu
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
| | | | - Xiaoxia Wu
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Bing Lv
- College of Bioscience and Biotechnology, Yangzhou University, Yangzhou, China
| | - Lijun Liu
- Jiangsu Key Laboratory of Crop Genetics and Physiology, Jiangsu Key Laboratory of Crop Genomics and Molecular Breeding, Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, China
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8
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Rankenberg T, Geldhof B, van Veen H, Holsteens K, Van de Poel B, Sasidharan R. Age-Dependent Abiotic Stress Resilience in Plants. TRENDS IN PLANT SCIENCE 2021; 26:692-705. [PMID: 33509699 DOI: 10.1016/j.tplants.2020.12.016] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 05/13/2023]
Abstract
Developmental age is a strong determinant of stress responses in plants. Differential susceptibility to various environmental stresses is widely observed at both the organ and whole-plant level. While it is clear that age determines stress susceptibility, the causes, regulatory mechanisms, and functions are only now beginning to emerge. Compared with concepts on age-related biotic stress resilience, advancements in the abiotic stress field are relatively limited. In this review, we focus on current knowledge of ontogenic resistance to abiotic stresses, highlighting examples at the organ (leaf) and plant level, preceded by an overview of the relevant concepts in plant aging. We also discuss age-related abiotic stress resilience mechanisms, speculate on their functional relevance, and outline outstanding questions.
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Affiliation(s)
- Tom Rankenberg
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Batist Geldhof
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium
| | - Hans van Veen
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Kristof Holsteens
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium
| | - Bram Van de Poel
- Division of Crop Biotechnics, Department of Biosystems, University of Leuven, Willem de Croylaan 42, 3001 Leuven, Belgium.
| | - Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands.
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9
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Zhang TQ, Chen Y, Liu Y, Lin WH, Wang JW. Single-cell transcriptome atlas and chromatin accessibility landscape reveal differentiation trajectories in the rice root. Nat Commun 2021; 12:2053. [PMID: 33824350 PMCID: PMC8024345 DOI: 10.1038/s41467-021-22352-4] [Citation(s) in RCA: 93] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Accepted: 03/08/2021] [Indexed: 12/26/2022] Open
Abstract
Root development relies on the establishment of meristematic tissues that give rise to distinct cell types that differentiate across defined temporal and spatial gradients. Dissection of the developmental trajectories and the transcriptional networks that underlie them could aid understanding of the function of the root apical meristem in both dicots and monocots. Here, we present a single-cell RNA (scRNA) sequencing and chromatin accessibility survey of rice radicles. By temporal profiling of individual root tip cells we reconstruct continuous developmental trajectories of epidermal cells and ground tissues, and elucidate regulatory networks underlying cell fate determination in these cell lineages. We further identify characteristic processes, transcriptome profiles, and marker genes for these cell types and reveal conserved and divergent root developmental pathways between dicots and monocots. Finally, we demonstrate the potential of the platform for functional genetic studies by using spatiotemporal modeling to identify a rice root meristematic mutant from a cell-specific gene cohort.
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Affiliation(s)
- Tian-Qi Zhang
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai, China.
| | - Yu Chen
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai, China
- University of Chinese Academy of Sciences, Shanghai, China
| | - Ye Liu
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, Key Laboratory of Landscaping, Ministry of Agriculture and Rural Affairs, College of Horticulture, Nanjing Agricultural University, Nanjing, China
| | - Wen-Hui Lin
- Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences & Biotechnology, Joint Center for Single Cell Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Jia-Wei Wang
- National Key Laboratory of Plant Molecular Genetics (NKLPMG), CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology (SIPPE), Chinese Academy of Sciences (CAS), Shanghai, China.
- ShanghaiTech University, Shanghai, 200031, China.
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Yamauchi T, Noshita K, Tsutsumi N. Climate-smart crops: key root anatomical traits that confer flooding tolerance. BREEDING SCIENCE 2021; 71:51-61. [PMID: 33762876 PMCID: PMC7973492 DOI: 10.1270/jsbbs.20119] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 10/14/2020] [Indexed: 05/05/2023]
Abstract
Plants require water, but a deficit or excess of water can negatively impact their growth and functioning. Soil flooding, in which root-zone is filled with excess water, restricts oxygen diffusion into the soil. Global climate change is increasing the risk of crop yield loss caused by flooding, and the development of flooding tolerant crops is urgently needed. Root anatomical traits are essential for plants to adapt to drought and flooding, as they determine the balance between the rates of water and oxygen transport. The stele contains xylem and the cortex contains aerenchyma (gas spaces), which respectively contribute to water uptake from the soil and oxygen supply to the roots; this implies that there is a trade-off between the ratio of cortex and stele sizes with respect to adaptation to drought or flooding. In this review, we analyze recent advances in the understanding of root anatomical traits that confer drought and/or flooding tolerance to plants and illustrate the trade-off between cortex and stele sizes. Moreover, we introduce the progress that has been made in modelling and fully automated analyses of root anatomical traits and discuss how key root anatomical traits can be used to improve crop tolerance to soil flooding.
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Affiliation(s)
- Takaki Yamauchi
- Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama 332-0012, Japan
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
| | - Koji Noshita
- Japan Science and Technology Agency, PRESTO, Kawaguchi, Saitama 332-0012, Japan
- Department of Biology, Kyushu University, Fukuoka, Fukuoka 819–0395, Japan
- Plant Frontier Research Center, Kyushu University, Fukuoka, Fukuoka 819–0395, Japan
| | - Nobuhiro Tsutsumi
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo 113-8657, Japan
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