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Kalra A, Goel S, Elias AA. Understanding role of roots in plant response to drought: Way forward to climate-resilient crops. THE PLANT GENOME 2024; 17:e20395. [PMID: 37853948 DOI: 10.1002/tpg2.20395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 07/26/2023] [Accepted: 09/18/2023] [Indexed: 10/20/2023]
Abstract
Drought stress leads to a significant amount of agricultural crop loss. Thus, with changing climatic conditions, it is important to develop resilience measures in agricultural systems against drought stress. Roots play a crucial role in regulating plant development under drought stress. In this review, we have summarized the studies on the role of roots and root-mediated plant responses. We have also discussed the importance of root system architecture (RSA) and the various structural and anatomical changes that it undergoes to increase survival and productivity under drought. Various genes, transcription factors, and quantitative trait loci involved in regulating root growth and development are also discussed. A summarization of various instruments and software that can be used for high-throughput phenotyping in the field is also provided in this review. More comprehensive studies are required to help build a detailed understanding of RSA and associated traits for breeding drought-resilient cultivars.
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Affiliation(s)
- Anmol Kalra
- Department of Botany, University of Delhi, North Campus, Delhi, India
| | - Shailendra Goel
- Department of Botany, University of Delhi, North Campus, Delhi, India
| | - Ani A Elias
- ICFRE - Institute of Forest Genetics and Tree Breeding (ICFRE - IFGTB), Coimbatore, India
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2
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Hu F, Fang D, Zhang W, Dong K, Ye Z, Cao J. Lateral root primordium: Formation, influencing factors and regulation. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108429. [PMID: 38359556 DOI: 10.1016/j.plaphy.2024.108429] [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: 06/05/2023] [Revised: 12/18/2023] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
Roots are the primary determinants of water and nutrient uptake by plants. The structure of roots is largely determined by the repeated formation of new lateral roots (LR). A new lateral root primordium (LRP) is formed between the beginning and appearance of LR, which defines the organization and function of LR. Therefore, proper LRP morphogenesis is a crucial process for lateral root formation. The development of LRP is regulated by multiple factors, including hormone and environmental signals. Roots integrate signals and regulate growth and development. At the molecular level, many genes regulate the growth and development of root organs to ensure stable development plans, while also being influenced by various environmental factors. To gain a better understanding of the LRP formation and its influencing factors, this study summarizes previous research. The cell cycle involved in LRP formation, as well as the roles of ROS, auxin, other auxin-related plant hormones, and genetic regulation, are discussed in detail. Additionally, the effects of gravity, mechanical stress, and cell death on LRP formation are explored. Throughout the text unanswered or poorly understood questions are identified to guide future research in this area.
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Affiliation(s)
- Fei Hu
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Da Fang
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Weimeng Zhang
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Kui Dong
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Ziyi Ye
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China
| | - Jun Cao
- School of Life Sciences, Jiangsu University, Zhenjiang, 212013, Jiangsu, China.
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3
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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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4
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Kumar A, Verma K, Kashyap R, Joshi VJ, Sircar D, Yadav SR. Auxin-responsive ROS homeostasis genes display dynamic expression pattern during rice crown root primordia morphogenesis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 206:108307. [PMID: 38159549 DOI: 10.1016/j.plaphy.2023.108307] [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: 09/24/2023] [Revised: 12/15/2023] [Accepted: 12/22/2023] [Indexed: 01/03/2024]
Abstract
Reactive oxygen species (ROS) are generated continuously as a by-product of aerobic metabolism in plants. While excessive ROS cause oxidative stresses in cells, they act as signaling molecules when maintained at an optimum concentration through the dynamic equilibrium of ROS metabolizing mechanisms to regulate growth, development and response to environmental stress. Auxin and its crosstalk with other signaling cascades are crucial for maintaining ROS homeostasis and orchestrating root architecture but dissecting the underlying mechanism requires detailed investigation at the molecular level. Rice fibrous root system is primarily composed of shoot-derived adventitious roots (also called crown roots). Here, we uncover auxin-ROS cross-talk during initiation and growth of rice roots. Potassium iodide treatment changes ROS levels that results in an altered rice root architecture. We reveal that auxin induction recover root growth and development defects by recouping level of hydrogen peroxide. By comparing global datasets previously generated by auxin induction and laser capture microdissection-RNA sequencing, we identify the redox-related antioxidants genes from peroxidase, glutathione reductase, glutathione S-transferase, and thioredoxin reductase families whose expression is regulated by the auxin signaling and also display dynamic expression patterns during crown root primordia morphogenesis. The auxin-mediated differential transcriptome data were validated by quantifying expression levels of a set of genes upon auxin induction. Further, in-depth spatio-temporal expression pattern analysis by RNA in situ hybridization shows the spatially restricted expression of selected genes in the developing crown root primordia. Together, our findings uncover molecular components of auxin-ROS crosstalk involved in root organogenesis.
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Affiliation(s)
- Akshay Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India
| | - Komal Verma
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India
| | - Rohan Kashyap
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India
| | - Vedika Jayant Joshi
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India
| | - Debabrata Sircar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India
| | - Shri Ram Yadav
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Uttarakhand, India.
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5
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Du P, Deng Q, Wang W, Garg V, Lu Q, Huang L, Wang R, Li H, Huai D, Chen X, Varshney RK, Hong Y, Liu H. scRNA-seq Reveals the Mechanism of Fatty Acid Desaturase 2 Mutation to Repress Leaf Growth in Peanut ( Arachis hypogaea L.). Cells 2023; 12:2305. [PMID: 37759528 PMCID: PMC10527976 DOI: 10.3390/cells12182305] [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: 06/14/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Fatty Acid Desaturase 2 (FAD2) controls the conversion of oleic acids into linoleic acids. Mutations in FAD2 not only increase the high-oleic content, but also repress the leaf growth. However, the mechanism by which FAD2 regulates the growth pathway has not been elucidated in peanut leaves with single-cell resolution. In this study, we isolated fad2 mutant leaf protoplast cells to perform single-cell RNA sequencing. Approximately 24,988 individual cells with 10,249 expressed genes were classified into five major cell types. A comparative analysis of 3495 differentially expressed genes (DEGs) in distinct cell types demonstrated that fad2 inhibited the expression of the cytokinin synthesis gene LOG in vascular cells, thereby repressing leaf growth. Further, pseudo-time trajectory analysis indicated that fad2 repressed leaf cell differentiation, and cell-cycle evidence displayed that fad2 perturbed the normal cell cycle to induce the majority of cells to drop into the S phase. Additionally, important transcription factors were filtered from the DEG profiles that connected the network involved in high-oleic acid accumulation (WRKY6), activated the hormone pathway (WRKY23, ERF109), and potentially regulated leaf growth (ERF6, MYB102, WRKY30). Collectively, our study describes different gene atlases in high-oleic and normal peanut seedling leaves, providing novel biological insights to elucidate the molecular mechanism of the high-oleic peanut-associated agronomic trait at the single-cell level.
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Affiliation(s)
- Puxuan Du
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Quanqing Deng
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Wenyi Wang
- College of Agriculture, South China Agriculture University, Guangzhou 510642, China;
| | - Vanika Garg
- WA State Agricultural Biotechnology Centre, Centre for Crop and Food Innovation, Food Futures Institute, Murdoch University (MU), Murdoch, WA 6150, Australia; (V.G.); (R.K.V.)
| | - Qing Lu
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Lu Huang
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Runfeng Wang
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Haifen Li
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Dongxin Huai
- Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture and Rural Affairs, Oil Crops Research Institute of Chinese Academy of Agricultural Sciences, Wuhan 430062, China;
| | - Xiaoping Chen
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Rajeev K. Varshney
- WA State Agricultural Biotechnology Centre, Centre for Crop and Food Innovation, Food Futures Institute, Murdoch University (MU), Murdoch, WA 6150, Australia; (V.G.); (R.K.V.)
| | - Yanbin Hong
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
| | - Hao Liu
- Guangdong Provincial Key Laboratory of Crop Genetic Improvement, South China Peanut Sub-Center of National Center of Oilseed Crops Improvement, Crops Research Institute, Guangdong Academy of Agricultural Sciences (GDAAS), Guangzhou 510640, China; (P.D.); (Q.D.); (Q.L.); (L.H.); (R.W.); (H.L.); (X.C.)
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Garg T, Yadav M, Mushahary KKK, Kumar A, Pal V, Singh H, Jain M, Yadav SR. Spatially activated conserved auxin-transcription factor regulatory module controls de novo root organogenesis in rice. PLANTA 2023; 258:52. [PMID: 37491477 DOI: 10.1007/s00425-023-04210-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 07/19/2023] [Indexed: 07/27/2023]
Abstract
MAIN CONCLUSION This study reveals that the process of crown root development and auxin-induced de novo root organogenesis during in vitro plantlet regeneration share a common auxin-OsWOX10 regulatory module in rice. In the fibrous-type root system of rice, the crown roots (CR) are developed naturally from the shoot tissues. Generation of robust auxin response, followed by activation of downstream cell fate determinants and signaling pathways at the onset of crown root primordia (CRP) establishment is essential for new root initiation. During rice tissue culture, embryonic calli are induced to regenerate shoots in vitro which undergo de novo root organogenesis on an exogenous auxin-supplemented medium, but the mechanism underlying spatially restricted root organogenesis remains unknown. Here, we reveal the dynamics of progressive activation of genes involved in auxin homeostasis and signaling during initiation and outgrowth of rice crown root primordia. By comparative global dataset analysis, we identify the crown root primordia-expressed genes whose expression is also regulated by auxin signaling. In-depth spatio-temporal expression pattern analysis shows that the exogenous application of auxin induces a set of key transcription factors exclusively in the spatially positioned CRP. Further, functional analysis of rice WUSCHEL-RELATED HOMEOBOX 10 (OsWOX10) during in vitro plantlet regeneration from embryogenic calli shows that it promotes de novo root organogenesis from regenerated shoots. Expression of rice OsWOX10 also induces adventitious roots (AR) in Arabidopsis, independent of homologous endogenous Arabidopsis genes. Together, our findings reveal that a common auxin-transcription factor regulatory module is involved in root organogenesis under different conditions.
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Affiliation(s)
- Tushar Garg
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
- Department of Plant Biology, University of California, Davis, CA, USA
| | - Manoj Yadav
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
- Department of Biochemistry, All India Institute of Medical Sciences, Raebareli, Uttar Pradesh, India
| | | | - Akshay Kumar
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
| | - Vivek Pal
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Harshita Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India
- Center for Organismal Studies, University of Heidelberg, 69120, Heidelberg, Germany
| | - Mukesh Jain
- School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi, India
| | - Shri Ram Yadav
- Department of Biosciences and Bioengineering, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India.
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7
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Singh H, Singh Z, Kashyap R, Yadav SR. Lateral root branching: evolutionary innovations and mechanistic divergence in land plants. THE NEW PHYTOLOGIST 2023; 238:1379-1385. [PMID: 36882384 DOI: 10.1111/nph.18864] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 02/19/2023] [Indexed: 06/18/2023]
Abstract
The root system architecture in plants is a result of multiple evolutionary innovations over time in response to changing environmental cues. Dichotomy and endogenous lateral branching in the roots evolved in lycophytes lineage but extant seed plants use lateral branching instead. This has led to the development of complex and adaptive root systems, with lateral roots playing a key role in this process exhibiting conserved and divergent features in different plant species. The study of lateral root branching in diverse plant species can shed light on the orderly yet distinct nature of postembryonic organogenesis in plants. This insight provides an overview of the diversity in lateral root (LR) development in various plant species during the evolution of root system in plants.
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Affiliation(s)
- Harshita Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
- Center for Organismal Studies, University of Heidelberg, Heidelberg, 69120, Germany
| | - Zeenu Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Rohan Kashyap
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
| | - Shri Ram Yadav
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, 247667, Uttarakhand, India
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8
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Song X, Xiong Y, Kong X, Huang G. Roles of auxin response factors in rice development and stress responses. PLANT, CELL & ENVIRONMENT 2023; 46:1075-1086. [PMID: 36397176 DOI: 10.1111/pce.14494] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 11/07/2022] [Accepted: 11/13/2022] [Indexed: 06/16/2023]
Abstract
Auxin signalling plays a key role in various developmental processes ranging from embryogenesis to senescence in plants. Auxin response factor (ARF), a key component of auxin signalling, functions by binding to auxin response element within promoter of auxin response genes, activating or repressing the target genes. Increasing evidences show that ARFs are crucial for plant response to stresses. This review summarises the recent advance on the functions and their regulatory pathways of rice ARFs in development and responding to stresses. The importance of OsARFs is demonstrated by their roles in triggering various physiological, biochemical and molecular reactions to resist adverse environmental conditions. We also describe the transcriptional and post-transcriptional regulation of OsARFs, and discuss the major challenges in this area.
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Affiliation(s)
- Xiaoyun Song
- Joint International Research Laboratory of Metabolic & Developmental Sciences, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Yali Xiong
- Joint International Research Laboratory of Metabolic & Developmental Sciences, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Xiuzhen Kong
- Joint International Research Laboratory of Metabolic & Developmental Sciences, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Guoqiang Huang
- Joint International Research Laboratory of Metabolic & Developmental Sciences, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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9
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Tanaka W, Yamauchi T, Tsuda K. Genetic basis controlling rice plant architecture and its modification for breeding. BREEDING SCIENCE 2023; 73:3-45. [PMID: 37168811 PMCID: PMC10165344 DOI: 10.1270/jsbbs.22088] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/25/2022] [Indexed: 05/13/2023]
Abstract
The shoot and root system architectures are fundamental for crop productivity. During the history of artificial selection of domestication and post-domestication breeding, the architecture of rice has significantly changed from its wild ancestor to fulfil requirements in agriculture. We review the recent studies on developmental biology in rice by focusing on components determining rice plant architecture; shoot meristems, leaves, tillers, stems, inflorescences and roots. We also highlight natural variations that affected these structures and were utilized in cultivars. Importantly, many core regulators identified from developmental mutants have been utilized in breeding as weak alleles moderately affecting these architectures. Given a surge of functional genomics and genome editing, the genetic mechanisms underlying the rice plant architecture discussed here will provide a theoretical basis to push breeding further forward not only in rice but also in other crops and their wild relatives.
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Affiliation(s)
- Wakana Tanaka
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8528, Japan
| | - Takaki Yamauchi
- Bioscience and Biotechnology Center, Nagoya University, Furo-cho, Chikusa, Nagoya, Aichi 464-8601, Japan
| | - Katsutoshi Tsuda
- National Institute of Genetics, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Department of Genetics, School of Life Science, Graduate University for Advanced Studies, 1111 Yata, Mishima, Shizuoka 411-8540, Japan
- Corresponding author (e-mail: )
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10
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Singh Z, Singh H, Garg T, Mushahary KKK, Yadav SR. Genetic and Hormonal Blueprint of Shoot-Borne Adventitious Root Development in Rice and Maize. PLANT & CELL PHYSIOLOGY 2023; 63:1806-1813. [PMID: 35713294 DOI: 10.1093/pcp/pcac084] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 05/05/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
The evolution of root architecture in plants was a prerequisite for the absorption of water and minerals from the soil, and thus a major determinant of terrestrial plant colonization. Cereals have a remarkably complex root system consisting of embryonic primary roots and post-embryonic lateral roots and shoot-borne adventitious roots. Among grass species, rice adventitious roots (also called crown roots) are developed from compressed nodes at the stem base, whereas in maize, besides crown roots, several aboveground brace roots are also formed, thus adventitious root types display species-specific diversity. Despite being the backbone for the adult root system in monocots, adventitious roots are the least studied of all the plant organs. In recent times, molecular genetics, genomics and proteomics-based approaches have been utilized to dissect the mechanism of post-embryonic meristem formation and tissue patterning. Adventitious root development is a cumulative effect of the actions and interactions of crucial genetic and hormonal regulators. In this review, we provide a comprehensive view of the key regulators involved during the different stages of adventitious root development in two important crop plants, rice and maize. We have reviewed the roles of major phytohormones, microRNAs and transcription factors and their crosstalk during adventitious root development in these cereal crops.
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Affiliation(s)
- Zeenu Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Harshita Singh
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | - Tushar Garg
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
| | | | - Shri Ram Yadav
- Department of Biosciences and Bioengineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
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11
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Wan Q, Zhai N, Xie D, Liu W, Xu L. WOX11: the founder of plant organ regeneration. CELL REGENERATION (LONDON, ENGLAND) 2023; 12:1. [PMID: 36596978 PMCID: PMC9810776 DOI: 10.1186/s13619-022-00140-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/29/2022] [Indexed: 01/05/2023]
Abstract
De novo organ regeneration is the process in which adventitious roots or shoots regenerate from detached or wounded organs. De novo organ regeneration can occur either in natural conditions, e.g. adventitious root regeneration from the wounded sites of detached leaves or stems, or in in-vitro tissue culture, e.g. organ regeneration from callus. In this review, we summarize recent advances in research on the molecular mechanism of de novo organ regeneration, focusing on the role of the WUSCHEL-RELATED HOMEOBOX11 (WOX11) gene in the model plant Arabidopsis thaliana. WOX11 is a direct target of the auxin signaling pathway, and it is expressed in, and regulates the establishment of, the founder cell during de novo root regeneration and callus formation. WOX11 activates the expression of its target genes to initiate root and callus primordia. Therefore, WOX11 links upstream auxin signaling to downstream cell fate transition during regeneration. We also discuss the role of WOX11 in diverse species and its evolution in plants.
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Affiliation(s)
- Qihui Wan
- grid.9227.e0000000119573309National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032 China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 China
| | - Ning Zhai
- grid.9227.e0000000119573309National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032 China
| | - Dixiang Xie
- grid.9227.e0000000119573309National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032 China ,grid.410726.60000 0004 1797 8419University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049 China
| | - Wu Liu
- grid.9227.e0000000119573309National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032 China
| | - Lin Xu
- grid.9227.e0000000119573309National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai, 200032 China
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12
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Induction of Somatic Embryogenesis in Plants: Different Players and Focus on WUSCHEL and WUS-RELATED HOMEOBOX (WOX) Transcription Factors. Int J Mol Sci 2022; 23:ijms232415950. [PMID: 36555594 PMCID: PMC9781121 DOI: 10.3390/ijms232415950] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022] Open
Abstract
In plants, other cells can express totipotency in addition to the zygote, thus resulting in embryo differentiation; this appears evident in apomictic and epiphyllous plants. According to Haberlandt's theory, all plant cells can regenerate a complete plant if the nucleus and the membrane system are intact. In fact, under in vitro conditions, ectopic embryos and adventitious shoots can develop from many organs of the mature plant body. We are beginning to understand how determination processes are regulated and how cell specialization occurs. However, we still need to unravel the mechanisms whereby a cell interprets its position, decides its fate, and communicates it to others. The induction of somatic embryogenesis might be based on a plant growth regulator signal (auxin) to determine an appropriate cellular environment and other factors, including stress and ectopic expression of embryo or meristem identity transcription factors (TFs). Still, we are far from having a complete view of the regulatory genes, their target genes, and their action hierarchy. As in animals, epigenetic reprogramming also plays an essential role in re-establishing the competence of differentiated cells to undergo somatic embryogenesis. Herein, we describe the functions of WUSCHEL-RELATED HOMEOBOX (WOX) transcription factors in regulating the differentiation-dedifferentiation cell process and in the developmental phase of in vitro regenerated adventitious structures.
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Kou X, Han W, Kang J. Responses of root system architecture to water stress at multiple levels: A meta-analysis of trials under controlled conditions. FRONTIERS IN PLANT SCIENCE 2022; 13:1085409. [PMID: 36570905 PMCID: PMC9780461 DOI: 10.3389/fpls.2022.1085409] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 11/28/2022] [Indexed: 05/31/2023]
Abstract
Plants are exposed to increasingly severe drought events and roots play vital roles in maintaining plant survival, growth, and reproduction. A large body of literature has investigated the adaptive responses of root traits in various plants to water stress and these studies have been reviewed in certain groups of plant species at a certain scale. Nevertheless, these responses have not been synthesized at multiple levels. This paper screened over 2000 literatures for studies of typical root traits including root growth angle, root depth, root length, root diameter, root dry weight, root-to-shoot ratio, root hair length and density and integrates their drought responses at genetic and morphological scales. The genes, quantitative trait loci (QTLs) and hormones that are involved in the regulation of drought response of the root traits were summarized. We then statistically analyzed the drought responses of root traits and discussed the underlying mechanisms. Moreover, we highlighted the drought response of 1-D and 2-D root length density (RLD) distribution in the soil profile. This paper will provide a framework for an integrated understanding of root adaptive responses to water deficit at multiple scales and such insights may provide a basis for selection and breeding of drought tolerant crop lines.
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Affiliation(s)
- Xinyue Kou
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Beijing, China
| | - Weihua Han
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agriculture Sciences, Beijing, China
| | - Jian Kang
- Interdisciplinary Plant Group, University of Missouri, Columbia, MO, United States
- Division of Plant Science and Technology, University of Missouri, Columbia, MO, United States
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14
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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: 5] [Impact Index Per Article: 2.5] [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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15
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Chen W, Chen Y, Siddique KH, Li S. Root penetration ability and plant growth in agroecosystems. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 183:160-168. [PMID: 35605464 DOI: 10.1016/j.plaphy.2022.04.024] [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: 01/13/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 06/15/2023]
Abstract
Root penetration ability is critical for plant growth and development. When roots encounter soil impedance, hormones are activated that affect cells and tissues, leading to changes in root morphology and configuration that often increase root penetration ability. Factors, such as root system architecture, root anatomic traits, rhizosphere exudation and root-induced phytohormones, influencing root penetration ability and how they affect plant performance under soil impedance were summarized. Root penetration ability affects plant capturing water and nutrients, and thus determines plant performance and productivity in adverse environments. Great efforts have been made in searching for the underlying mechanisms of root penetration ability, and tools have been developed for phenotyping variability in root penetration ability. Therefore, with the continued development of agroecosystems based on the advocated low input costs and controlled tillage, crops or genotypes of a crop species with stronger root penetration ability may have the potential for developing new varieties with enhanced adaptation and grain yield under mechanical impedance in soil.
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Affiliation(s)
- Wenqian Chen
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.
| | - Yinglong Chen
- The UWA Institute of Agriculture, And School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6155, Australia
| | - Kadambot Hm Siddique
- The UWA Institute of Agriculture, And School of Agriculture and Environment, The University of Western Australia, Perth, WA, 6155, Australia
| | - Shiqing Li
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi, 712100, China; College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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16
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Zhou J, Qiao J, Wang J, Quan R, Huang R, Qin H. OsQHB Improves Salt Tolerance by Scavenging Reactive Oxygen Species in Rice. FRONTIERS IN PLANT SCIENCE 2022; 13:848891. [PMID: 35599895 PMCID: PMC9115556 DOI: 10.3389/fpls.2022.848891] [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: 01/05/2022] [Accepted: 03/30/2022] [Indexed: 06/15/2023]
Abstract
Soil salinity is a major environmental stress that restricts the growth and yield of crops. Mining the key genes involved in the balance of rice salt tolerance and yield will be extremely important for us to cultivate salt-tolerance rice varieties. In this study, we report a WUSCHEL-related homeobox (WOX) gene, quiescent-center-specific homeobox (OsQHB), positively regulates yield-related traits and negatively regulates salt tolerance in rice. Mutation in OsQHB led to a decrease in plant height, tiller number, panicle length, grain length and grain width, and an increase in salt tolerance. Transcriptome and qPCR analysis showed that reactive oxygen species (ROS) scavenging-related genes were regulated by OsQHB. Moreover, the osqhb mutants have higher ROS-scavenging enzymes activities and lower accumulation of ROS and malondialdehyde (MDA) under salt stress. Thus, our findings provide new insights into the role of rice WOX gene family in rice development and salt tolerance, and suggest that OsQHB is a valuable target for improving rice production in environments characterized by salt stress.
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Affiliation(s)
- Jiahao Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jinzhu Qiao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Juan Wang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, China
| | - Ruidang Quan
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, China
| | - Rongfeng Huang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, China
| | - Hua Qin
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
- National Key Facility of Crop Gene Resources and Genetic Improvement, Beijing, China
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17
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Amtmann A, Bennett MJ, Henry A. Root phenotypes for the future. PLANT, CELL & ENVIRONMENT 2022; 45:595-601. [PMID: 35092061 DOI: 10.1111/pce.14269] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Anna Amtmann
- Institute of Molecular, Cell and Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Malcolm J Bennett
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Leicestershire, UK
| | - Amelia Henry
- Plant Breeding Innovations Platform, International Rice Research Institute (IRRI), Los Baños, Laguna, Philippines
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18
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Kawai T, Chen Y, Takahashi H, Inukai Y, Siddique KHM. Rice Genotypes Express Compensatory Root Growth With Altered Root Distributions in Response to Root Cutting. FRONTIERS IN PLANT SCIENCE 2022; 13:830577. [PMID: 35295630 PMCID: PMC8919052 DOI: 10.3389/fpls.2022.830577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 01/28/2022] [Indexed: 05/07/2023]
Abstract
Root systems play a pivotal role in water and nutrient uptake from soil. Lateral root (LR) growth is promoted to compensate for inhibited main root growth. Compensatory LR growth contributes to maintaining total root length (TRL) and hence water and nutrient uptake in compacted soils. However, it remains unclear how shoot and root phenotypic traits change during the compensatory growth and whether there are genotypic variations in compensatory root growth. This study analyzed shoot and root morphological traits of 20 rice genotypes, which includes mutants with altered root morphology, during the vegetative stage using a semihydroponic phenotyping system. The phenotyping experiment detected large variation in root and shoot traits among the 20 genotypes. Morphological changes induced by root cutting were analyzed in six selected genotypes with contrasting root system architecture. Root cutting significantly affected root distribution along vertical sections and among diameter classes. After root cutting, more roots distributed at shallower depth and thicker LRs developed. Furthermore, genotypes with deeper root growth without root cutting allocated more compensatory roots to deeper sections even after root cutting than the genotypes with shallower rooting. Due to the compensatory LR growth, root cutting did not significantly affect TRL, root dry weight (RDW), or shoot dry weight (SDW). To analyze the interaction between crown root (CR) number and compensatory root growth, we removed half of the newly emerged CRs in two genotypes. TRL of YRL38 increased at depth with CR number manipulation (CRM) regardless of root tip excision, which was attributed to an increase in specific root length (SRL), despite no change in RDW. Taken together, the tested rice genotypes exhibited compensatory root growth by changing root distribution at depth and in diameter classes. Reducing CR number promoted root development and compensatory growth by improving the efficiency of root development [root length (RL) per resource investment].
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Affiliation(s)
- Tsubasa Kawai
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
- School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Yinglong Chen
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
- School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Hirokazu Takahashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
| | - Kadambot H. M. Siddique
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
- School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
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19
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Kawai T, Akahoshi R, Shelley IJ, Kojima T, Sato M, Tsuji H, Inukai Y. Auxin Distribution in Lateral Root Primordium Development Affects the Size and Lateral Root Diameter of Rice. FRONTIERS IN PLANT SCIENCE 2022; 13:834378. [PMID: 35498720 PMCID: PMC9043952 DOI: 10.3389/fpls.2022.834378] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Accepted: 03/07/2022] [Indexed: 05/11/2023]
Abstract
Lateral roots (LRs) occupy a large part of the root system and play a central role in plant water and nutrient uptake. Monocot plants, such as rice, produce two types of LRs: the S-type (short and thin) and the L-type (long, thick, and capable of further branching). Because of the ability to produce higher-order branches, the L-type LR formation contributes to efficient root system expansion. Auxin plays a major role in regulating the root system development, but its involvement in developing different types of LRs is largely unknown. Here, we show that auxin distribution is involved in regulating LR diameter. Dynamin-related protein (DRP) genes were isolated as causative genes of the mutants with increased L-type LR number and diameter than wild-type (WT). In the drp mutants, reduced endocytic activity was detected in rice protoplast and LRs with a decreased OsPIN1b-GFP endocytosis in the protoplast. Analysis of auxin distribution using auxin-responsive promoter DR5 revealed the upregulated auxin signaling in L-type LR primordia (LRP) of the WT and the mutants. The application of polar auxin transport inhibitors enhanced the effect of exogenous auxin to increase LR diameter with upregulated auxin signaling in the basal part of LRP. Inducible repression of auxin signaling in the mOsIAA3-GR system suppressed the increase in LR diameter after root tip excision, suggesting a positive role of auxin signaling in LR diameter increase. A positive regulator of LR diameter, OsWOX10, was auxin-inducible and upregulated in the drp mutants more than the WT, and revealed as a potential target of ARF transcriptional activator. Therefore, auxin signaling upregulation in LRP, especially at the basal part, induces OsWOX10 expression, increasing LR diameter.
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Affiliation(s)
- Tsubasa Kawai
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- School of Agriculture and Environment, The UWA Institute of Agriculture, The University of Western Australia, Perth, WA, Australia
| | - Ryosuke Akahoshi
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Israt J. Shelley
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
- Department of Crop Botany, Bangladesh Agricultural University, Mymensingh, Bangladesh
| | - Takaaki Kojima
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Moeko Sato
- Kihara Institute for Biological Research, Yokohama City University, Yokohama, Japan
| | - Hiroyuki Tsuji
- Kihara Institute for Biological Research, Yokohama City University, Yokohama, Japan
| | - Yoshiaki Inukai
- International Center for Research and Education in Agriculture, Nagoya University, Nagoya, Japan
- *Correspondence: Yoshiaki Inukai,
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