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Prout JN, Williams A, Wanke A, Schornack S, Ton J, Field KJ. Mucoromycotina 'fine root endophytes': a new molecular model for plant-fungal mutualisms? TRENDS IN PLANT SCIENCE 2024; 29:650-661. [PMID: 38102045 DOI: 10.1016/j.tplants.2023.11.014] [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: 08/25/2023] [Revised: 11/10/2023] [Accepted: 11/16/2023] [Indexed: 12/17/2023]
Abstract
The most studied plant-fungal symbioses to date are the interactions between plants and arbuscular mycorrhizal (AM) fungi of the Glomeromycotina clade. Advancements in phylogenetics and microbial community profiling have distinguished a group of symbiosis-forming fungi that resemble AM fungi as belonging instead to the Mucoromycotina. These enigmatic fungi are now known as Mucoromycotina 'fine root endophytes' and could provide a means to understand the origins of plant-fungal symbioses. Most of our knowledge of the mechanisms of fungal symbiosis comes from investigations using AM fungi. Here, we argue that inclusion of Mucoromycotina fine root endophytes in future studies will expand our understanding of the mechanisms, evolution, and ecology of plant-fungal symbioses.
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Affiliation(s)
- James N Prout
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
| | - Alex Williams
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Alan Wanke
- Sainsbury Laboratory, University of Cambridge, Cambridge CB2 1LR, UK
| | | | - Jurriaan Ton
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Katie J Field
- Plants, Photosynthesis and Soil, School of Biosciences, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
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Kusakabe R, Sasuga M, Yamato M. Ubiquitous arbuscular mycorrhizal fungi in the roots of herbaceous understory plants with hyphal degeneration in Colchicaceae and Gentianaceae. MYCORRHIZA 2024; 34:181-190. [PMID: 38630303 PMCID: PMC11166799 DOI: 10.1007/s00572-024-01145-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2024] [Accepted: 04/10/2024] [Indexed: 06/12/2024]
Abstract
Due to the loss of photosynthetic ability during evolution, some plant species rely on mycorrhizal fungi for their carbon source, and this nutritional strategy is known as mycoheterotrophy. Mycoheterotrophic plants forming Paris-type arbuscular mycorrhizas (AM) exhibit two distinctive mycorrhizal features: degeneration of fungal materials and specialization towards particular fungal lineages. To explore the possibility that some understory AM plants show partial mycoheterotrophy, i.e., both photosynthetic and mycoheterotrophic nutritional strategies, we investigated 13 green herbaceous plant species collected from five Japanese temperate forests. Following microscopic observation, degenerated hyphal coils were observed in four species: two Colchicaceae species, Disporum sessile and Disporum smilacinum, and two Gentianaceae species, Gentiana scabra and Swertia japonica. Through amplicon sequencing, however, we found that all examined plant species exhibited no specificity toward AM fungi. Several AM fungi were consistently found across most sites and all plant species studied. Because previous studies reported the detection of these AM fungi from various tree species in Japanese temperate forests, our findings suggest the presence of ubiquitous AM fungi in forest ecosystems. If the understory plants showing fungal degeneration exhibit partial mycoheterotrophy, they may obtain carbon compounds indirectly from a wide range of surrounding plants utilizing such ubiquitous AM fungi.
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Affiliation(s)
- Ryota Kusakabe
- Graduate School of Horticulture, Chiba University, 648, Matsudo, Chiba, Matsudo, 271-8510, Japan
| | - Moe Sasuga
- Graduate School of Education, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Masahide Yamato
- Faculty of Education, Chiba University, 1-33, Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
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Perotto S, Balestrini R. At the core of the endomycorrhizal symbioses: intracellular fungal structures in orchid and arbuscular mycorrhiza. THE NEW PHYTOLOGIST 2024; 242:1408-1416. [PMID: 37884478 DOI: 10.1111/nph.19338] [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: 08/07/2023] [Accepted: 09/27/2023] [Indexed: 10/28/2023]
Abstract
Arbuscular (AM) and orchid (OrM) mycorrhiza are the most widespread mycorrhizal symbioses among flowering plants, formed by distinct fungal and plant species. They are both endosymbioses because the fungal hyphae can enter inside the plant cell to develop intracellular fungal structures that are surrounded by the plant membrane. The symbiotic plant-fungus interface is considered to be the major site of nutrient transfer to the host plant. We summarize recent data on nutrient transfer in OrM and compare the development and function of the arbuscules formed in AM and the pelotons formed in OrM in order to outline differences and conserved traits. We further describe the unexpected similarities in the form and function of the intracellular mycorrhizal fungal structures observed in orchids and in the roots of mycoheterotrophic plants forming AM. We speculate that these similarities may be the result of convergent evolution of mycorrhizal types in mycoheterotrophic plants and highlight knowledge gaps and new research directions to explore this scenario.
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Affiliation(s)
- Silvia Perotto
- Dipartimento di Scienze della Vita e Biologia dei Sistemi, Università degli Studi di Torino, Viale Mattioli 25, Torino, 10125, Italy
| | - Raffaella Balestrini
- Consiglio Nazionale delle Ricerche-Istituto per la Protezione Sostenibile delle Piante (IPSP), Strada delle Cacce 73, 10135, Torino, Italy
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Bento RA, de Novais CB, Saggin-Júnior OJ, de Oliveira LA, Sampaio PDTB. Pioneer Tree Bellucia imperialis (Melastomataceae) from Central Amazon with Seedlings Highly Dependent on Arbuscular Mycorrhizal Fungi. J Fungi (Basel) 2023; 9:jof9050540. [PMID: 37233251 DOI: 10.3390/jof9050540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/17/2023] [Accepted: 04/26/2023] [Indexed: 05/27/2023] Open
Abstract
Bellucia imperialis is one of the most abundant pioneer tree species in anthropized areas of the Central Amazon, and has ecological importance for the environmental resilience of phosphorus (P)-depleted areas. Thus, we investigated whether B. imperialis depends on symbiosis with arbuscular mycorrhizal fungi (AMF) to grow and establish under the edaphic stresses of low nutrient content and low surface moisture retention capacity of the substrate. We tried three AMF inoculation treatments: (1) CON-no mycorrhizae; (2) MIX-with AMF from pure collection cultures, and (3) NAT-with native AMF, combined with five doses of P via a nutrient solution. All CON treatment seedlings died without AMF, showing the high mycorrhizal dependence of B. imperialis. Increasing P doses significantly decreased the leaf area and shoot and root biomass growth for both the NAT and MIX treatments. Increasing P doses did not affect spore number or mycorrhizal colonization, but decreased the diversity of AMF communities. Some species of the AMF community showed plasticity, enabling them to withstand shortages of and excess P. B. imperialis was shown to be sensitive to excess P, promiscuous, dependent on AMF, and tolerant of scarce nutritional resources, highlighting the need to inoculate seedlings to reforest impacted areas.
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Affiliation(s)
- Ricardo Aparecido Bento
- Postgraduate Program in Tropical Forest Sciences (PPG-CFT) at the National Research Institute of Amazonas (INPA), Federal Institute of Education, Science and Technology of Amazonas (IFAM), Manaus 69086-475, Brazil
| | - Cândido Barreto de Novais
- Department of Soil at the Federal Rural University of Rio de Janeiro (UFRRJ), Seropédica 23897-000, Brazil
| | - Orivaldo José Saggin-Júnior
- Laboratory of Mycorrhiza of the Brazilian Agricultural Research Corporation-Embrapa Agrobiology, Seropédica 23891-000, Brazil
| | - Luiz Antonio de Oliveira
- Laboratory of Ecology and Biotechnology of Microorganisms from the Amazon, Tropical Forestry of the National Research Institute of Amazonas (INPA), Manaus 69060-001, Brazil
| | - Paulo de Tarso Barbosa Sampaio
- Laboratory of Ecology and Biotechnology of Microorganisms from the Amazon, Tropical Forestry of the National Research Institute of Amazonas (INPA), Manaus 69060-001, Brazil
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Stanković M. 10th Anniversary of Plants-Recent Advances and Further Perspectives. PLANTS (BASEL, SWITZERLAND) 2023; 12:1696. [PMID: 37111918 PMCID: PMC10145593 DOI: 10.3390/plants12081696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 04/08/2023] [Indexed: 06/19/2023]
Abstract
Published for the first time in 2012, Plants will celebrate its 10th anniversary [...].
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Affiliation(s)
- Milan Stanković
- Department of Biology and Ecology, Faculty of Science, University of Kragujevac, Radoja Domanovića 12, 34000 Kragujevac, Serbia
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Gao Y, Huang S, Wang Y, Lin H, Pan Z, Zhang S, Zhang J, Wang W, Cheng S, Chen Y. Analysis of the molecular and biochemical mechanisms involved in the symbiotic relationship between Arbuscular mycorrhiza fungi and Manihot esculenta Crantz. FRONTIERS IN PLANT SCIENCE 2023; 14:1130924. [PMID: 36959933 PMCID: PMC10028151 DOI: 10.3389/fpls.2023.1130924] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 02/22/2023] [Indexed: 05/27/2023]
Abstract
INTRODUCTION Plants and arbuscular mycorrhizal fungi (AMF) mutualistic interactions are essential for sustainable agriculture production. Although it is shown that AMF inoculation improves cassava physiological performances and yield traits, the molecular mechanisms involved in AM symbiosis remain largely unknown. Herein, we integrated metabolomics and transcriptomics analyses of symbiotic (Ri) and asymbiotic (CK) cassava roots and explored AM-induced biochemical and transcriptional changes. RESULTS Three weeks (3w) after AMF inoculations, proliferating fungal hyphae were observable, and plant height and root length were significantly increased. In total, we identified 1,016 metabolites, of which 25 were differentially accumulated (DAMs) at 3w. The most highly induced metabolites were 5-aminolevulinic acid, L-glutamic acid, and lysoPC 18:2. Transcriptome analysis identified 693 and 6,481 differentially expressed genes (DEGs) in the comparison between CK (3w) against Ri at 3w and 6w, respectively. Functional enrichment analyses of DAMs and DEGs unveiled transport, amino acids and sugar metabolisms, biosynthesis of secondary metabolites, plant hormone signal transduction, phenylpropanoid biosynthesis, and plant-pathogen interactions as the most differentially regulated pathways. Potential candidate genes, including nitrogen and phosphate transporters, transcription factors, phytohormone, sugar metabolism-related, and SYM (symbiosis) signaling pathway-related, were identified for future functional studies. DISCUSSION Our results provide molecular insights into AM symbiosis and valuable resources for improving cassava production.
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Affiliation(s)
- Yu Gao
- Sanya Nanfan Research Institute of Hainan University, School of Life Science, Hainan University, Haikou, Hainan, China
| | - Siyuan Huang
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Yujie Wang
- Sanya Nanfan Research Institute of Hainan University, School of Life Science, Hainan University, Haikou, Hainan, China
| | - Hongxin Lin
- Soil and Fertilizer & Resources and Environment Institute, Jiangxi Academy of Agricultural Sciences, Nanchang, Jiangxi, China
| | - Zhiyong Pan
- College of Horticulture and Forestry of Huazhong Agricultural University, Wuhan, China
| | - Shubao Zhang
- Sanya Nanfan Research Institute of Hainan University, School of Life Science, Hainan University, Haikou, Hainan, China
| | - Jie Zhang
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Wenquan Wang
- College of Tropical Crops, Hainan University, Haikou, Hainan, China
| | - Shanhan Cheng
- Sanya Nanfan Research Institute of Hainan University, School of Life Science, Hainan University, Haikou, Hainan, China
| | - Yinhua Chen
- Sanya Nanfan Research Institute of Hainan University, School of Life Science, Hainan University, Haikou, Hainan, China
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Zeng Z, Liu Y, Feng XY, Li SX, Jiang XM, Chen JQ, Shao ZQ. The RNAome landscape of tomato during arbuscular mycorrhizal symbiosis reveals an evolving RNA layer symbiotic regulatory network. PLANT COMMUNICATIONS 2023; 4:100429. [PMID: 36071667 PMCID: PMC9860192 DOI: 10.1016/j.xplc.2022.100429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 08/15/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
Arbuscular mycorrhizal symbiosis (AMS) is an ancient plant-fungus relationship that is widely distributed in terrestrial plants. The formation of symbiotic structures and bidirectional nutrient exchange requires the regulation of numerous genes. However, the landscape of RNAome during plant AMS involving different types of regulatory RNA is poorly understood. In this study, a combinatorial strategy utilizing multiple sequencing approaches was used to decipher the landscape of RNAome in tomato, an emerging AMS model. The annotation of the tomato genome was improved by a multiple-platform sequencing strategy. A total of 3,174 protein-coding genes were upregulated during AMS, 42% of which were alternatively spliced. Comparative-transcriptome analysis revealed that genes from 24 orthogroups were consistently induced by AMS in eight phylogenetically distant angiosperms. Seven additional orthogroups were specifically induced by AMS in all surveyed dicot AMS host plants. However, these orthogroups were absent or not induced in monocots and/or non-AMS hosts, suggesting a continuously evolving AMS-responsive network in addition to a conserved core regulatory module. Additionally, we detected 587 lncRNAs, ten miRNAs, and 146 circRNAs that responded to AMS, which were incorporated to establish a tomato AMS-responsive, competing RNA-responsive endogenous RNA (ceRNA) network. Finally, a tomato symbiotic transcriptome database (TSTD, https://efg.nju.edu.cn/TSTD) was constructed to serve as a resource for deep deciphering of the AMS regulatory network. These results help elucidate the reconfiguration of the tomato RNAome during AMS and suggest a sophisticated and evolving RNA layer responsive network during AMS processes.
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Affiliation(s)
- Zhen Zeng
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Yang Liu
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Xing-Yu Feng
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Sai-Xi Li
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Xing-Mei Jiang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China
| | - Jian-Qun Chen
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
| | - Zhu-Qing Shao
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing 210023, China.
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