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Hewitt RE, DeVan MR, Taylor DL, Mack MC. Root-associated fungi and acquisitive root traits facilitate permafrost nitrogen uptake from long-term experimentally warmed tundra. THE NEW PHYTOLOGIST 2024; 242:1704-1716. [PMID: 38273466 DOI: 10.1111/nph.19521] [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: 06/30/2023] [Accepted: 11/27/2023] [Indexed: 01/27/2024]
Abstract
Root-associated fungi (RAF) and root traits regulate plant acquisition of nitrogen (N), which is limiting to growth in Arctic ecosystems. With anthropogenic warming, a new N source from thawing permafrost has the potential to change vegetation composition and increase productivity, influencing climate feedbacks. Yet, the impact of warming on tundra plant root traits, RAF, and access to permafrost N is uncertain. We investigated the relationships between RAF, species-specific root traits, and uptake of N from the permafrost boundary by tundra plants experimentally warmed for nearly three decades at Toolik Lake, Alaska. Warming increased acquisitive root traits of nonmycorrhizal and mycorrhizal plants. RAF community composition of ericoid (ERM) but not ectomycorrhizal (ECM) shrubs was impacted by warming and correlated with root traits. RAF taxa in the dark septate endophyte, ERM, and ECM guilds strongly correlated with permafrost N uptake for ECM and ERM shrubs. Overall, a greater proportion of variation in permafrost N uptake was related to root traits than RAF. Our findings suggest that warming Arctic ecosystems will result in interactions between roots, RAF, and newly thawed permafrost that may strongly impact feedbacks to the climate system through mechanisms of carbon and N cycling.
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Affiliation(s)
- Rebecca E Hewitt
- Center for Ecosystem Science and Society, Northern Arizona University, PO Box 5620, Flagstaff, AZ, 86011, USA
- Department of Environmental Studies, Amherst College, Amherst, MA, 01002, USA
| | - M Rae DeVan
- Department of Biology, University of New Mexico, MSC03 2020, Albuquerque, NM, 87131, USA
| | - D Lee Taylor
- Department of Biology, University of New Mexico, MSC03 2020, Albuquerque, NM, 87131, USA
| | - Michelle C Mack
- Center for Ecosystem Science and Society, Northern Arizona University, PO Box 5620, Flagstaff, AZ, 86011, USA
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2
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Luo W, Wang Y, Cahill JF, Luan F, Zhong Y, Li Y, Li B, Chu C. Root-centric β diversity reveals functional homogeneity while phylogenetic heterogeneity in a subtropical forest. Ecology 2024; 105:e4189. [PMID: 37877169 DOI: 10.1002/ecy.4189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/25/2023] [Indexed: 10/26/2023]
Abstract
Root-centric studies have revealed fast taxonomic turnover across root neighborhoods, but how such turnover is accompanied by changes in species functions and phylogeny (i.e., β diversity) remains largely unknown. As β diversity can reflect the degree of community-wide biotic homogenization, such information is crucial for better inference of below-ground assembly rules, community structuring, and ecosystem processes. We collected 2480 root segments from 625 0-30 cm soil profiles in a subtropical forest in China. Root segments were identified into 138 species with DNA-barcoding with six root morphological and architectural traits measured per species. By using the mean pairwise (Dpw ) and mean nearest neighbor distance (Dnn ) to quantify species ecological differences, we first tested the non-random functional and phylogenetic turnover of root neighborhoods that would lend more support to deterministic over stochastic community assembly processes. Additionally, we examined the distance-decay pattern of β diversity, and finally partitioned β diversity into geographical and environmental components to infer their potential drivers of environmental filtering, dispersal limitation, and biotic interactions. We found that functional turnover was often lower than expected given the taxonomic turnover, whereas phylogenetic turnover was often higher than expected. Phylogenetic Dpw (e.g., interfamily species) turnover exhibited a distance-decay pattern, likely reflecting limited dispersal or abiotic filtering that leads to the spatial aggregation of specific plant lineages. Conversely, both functional and phylogenetic Dnn (e.g., intrageneric species) exhibited an inverted distance-decay pattern, likely reflecting strong biotic interactions among spatially and phylogenetically close species leading to phylogenetic and functional divergence. While the spatial distance was generally a better predictor of β diversity than environmental distance, the joint effect of environmental and spatial distance usually overrode their respective pure effects. These findings suggest that root neighborhood functional homogeneity may somewhat increase forest resilience after disturbance by exhibiting an insurance effect. Likewise, root neighborhood phylogenetic heterogeneity may enhance plant fitness by hindering the transmission of host-specific pathogens through root networks or by promoting interspecific niche complementarity not captured by species functions. Our study highlights the potential role of root-centric β diversity in mediating community structures and functions largely ignored in previous studies.
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Affiliation(s)
- Wenqi Luo
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, China
| | - Youshi Wang
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - James F Cahill
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Fucheng Luan
- Guangdong Chebaling National Nature Reserve, Shaoguan, China
| | - Yonglin Zhong
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Yuanzhi Li
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, China
| | - Buhang Li
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
| | - Chengjin Chu
- State Key Laboratory of Biocontrol, School of Ecology, Sun Yat-sen University, Shenzhen, China
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, Guangzhou, China
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3
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Saha S, Huang L, Khoso MA, Wu H, Han D, Ma X, Poudel TR, Li B, Zhu M, Lan Q, Sakib N, Wei R, Islam MZ, Zhang P, Shen H. Fine root decomposition in forest ecosystems: an ecological perspective. FRONTIERS IN PLANT SCIENCE 2023; 14:1277510. [PMID: 38023858 PMCID: PMC10643187 DOI: 10.3389/fpls.2023.1277510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023]
Abstract
Fine root decomposition is a physio-biochemical activity that is critical to the global carbon cycle (C) in forest ecosystems. It is crucial to investigate the mechanisms and factors that control fine root decomposition in forest ecosystems to understand their system-level carbon balance. This process can be influenced by several abiotic (e.g., mean annual temperature, mean annual precipitation, site elevation, stand age, salinity, soil pH) and biotic (e.g., microorganism, substrate quality) variables. Comparing decomposition rates within sites reveals positive impacts of nitrogen and phosphorus concentrations and negative effects of lignin concentration. Nevertheless, estimating the actual fine root breakdown is difficult due to inadequate methods, anthropogenic activities, and the impact of climate change. Herein, we propose that how fine root substrate and soil physiochemical characteristics interact with soil microorganisms to influence fine root decomposition. This review summarized the elements that influence this process, as well as the research methods used to investigate it. There is also need to study the influence of annual and seasonal changes affecting fine root decomposition. This cumulative evidence will provide information on temporal and spatial dynamics of forest ecosystems, and will determine how logging and reforestation affect fine root decomposition.
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Affiliation(s)
- Sudipta Saha
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Lei Huang
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Muneer Ahmed Khoso
- Key Laboratory of Saline-Alkali Vegetation Ecology Restoration, Ministry of Education, Department of Life Science, Northeast Forestry University, Harbin, China
| | - Haibo Wu
- College of Forestry, Northeast Forestry University, Harbin, China
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Donghui Han
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Xiao Ma
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Tika Ram Poudel
- Feline Research Center of National Forestry and Grassland Administration, College of Wildlife and Protected Area, Northeast Forestry University, Harbin, China
| | - Bei Li
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Meiru Zhu
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Qiurui Lan
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Nazmus Sakib
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Ruxiao Wei
- College of Forestry, Northeast Forestry University, Harbin, China
| | - Md. Zahirul Islam
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Peng Zhang
- College of Forestry, Northeast Forestry University, Harbin, China
- Key Laboratory of Sustainable Forest Ecosystem Management, Ministry of Education, Northeast Forestry University, Harbin, China
| | - Hailong Shen
- College of Forestry, Northeast Forestry University, Harbin, China
- State Forestry and Grassland Administration Engineering Technology Research Center of Korean Pine, Harbin, China
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4
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Guo Y, Shen K, Xia T, He Y, Ren W, Wu P, Lin Y, Wu B, Han X, Gao L, Li J, Hu X, Wang L, Jiao M, Yan J, Yang X, Yu H, Zhang J. The interspecific competition of tree plants in the presence of AM fungi and litter facilitates root morphological development and nutrition when compared with intraspecific competition. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:80496-80511. [PMID: 37300731 DOI: 10.1007/s11356-023-28119-2] [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: 03/14/2023] [Accepted: 06/01/2023] [Indexed: 06/12/2023]
Abstract
Arbuscular mycorrhizal (AM) fungi can affect plant growth by regulating competition. Nutrient-deficient karst habitats contain abundant plants that compete for nutrients through interspecific or intraspecific competition, involving the nutritional transformation of litter decomposition. However, how plant competition in the presence of AM fungi and litter affects root development and nutrition remains unclear. A potted experiment was conducted, including AM fungus treatment with or without Glomus etunicatum, the competition treatment concerning intraspecific or interspecific competition through planting Broussonetia papyrifera and Carpinus pubescens seedlings, and the litter treatment with or without the mixture of B. papyrifera and C. pubescens litter leaves. The root morphological traits were analyzed, and nitrogen (N), phosphorus (P), and potassium (K) were measured. The results showed that AM fungus differently affected the root morphological development and nutrition of both competitive plants, significantly promoting B. papyrifera roots in the increase of dry weight, length, volume, surface area, tips, and branches as well as N, P, and K acquisitions regardless of litter addition. However, there was no apparent influence for C. pubescens roots, except for the diameter in the interspecific competition with litter. The root dry weight, length, volume, surface area, and tips of B. papyrifera under two competitive styles were significantly greater than C. pubescens regulated by AM fungus, presenting significant species differences. The responses of the relative competition intensity (RCI) on root morphological and nutritional traits indicated that AM fungus and litter both asymmetrically alleviated more competitive pressure for B. papyrifera than C. pubescens, and the interspecific competition facilitated more root morphological development and nutrition utilization by endowing B. papyrifera root superiority relative to C. pubescens compared with the intraspecific competition. In conclusion, interspecific competition is more beneficial for plant root development and nutrition than intraspecific competition in the presence of AM fungus and litter via asymmetrically alleviating competitive pressure for different plants.
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Affiliation(s)
- Yun Guo
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang, 550025, China
| | - Kaiping Shen
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Tingting Xia
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Yuejun He
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China.
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang, 550025, China.
| | - Wenda Ren
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Pan Wu
- Key Laboratory of Karst Georesources and Environment, Ministry of Education, Guizhou University, Guiyang, 550025, China
| | - Yan Lin
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Bangli Wu
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Xu Han
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Lu Gao
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Jinting Li
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Xiaorun Hu
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Li Wang
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Min Jiao
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Jiawei Yan
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Xionggui Yang
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Hangcheng Yu
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
| | - Jingkun Zhang
- Forestry College, Research Center of Forest Ecology, Guizhou University, Guiyang, 550025, China
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Herben T, Šašek J, Balšánková T, Hadincová V, Krahulec F, Krak K, Pecháčková S, Skálová H. The shape of root systems in a mountain meadow: plastic responses or species-specific architectural blueprints? THE NEW PHYTOLOGIST 2022; 235:2223-2236. [PMID: 35363897 DOI: 10.1111/nph.18132] [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: 11/29/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
The efficient uptake of nutrients depends on the ability of roots to respond to gradients of these resources. Although pot experiments have shown that species differ in their ability to proliferate their roots in nutrient-rich patches, the role of such differences in determining root shapes in the field is unclear. We used fine-scale quantitative (q)PCR-based species-specific mapping of roots in a grassland community to reconstruct species-specific root system shapes. We linked them with data from pot experiments on the ability of these species to proliferate in nutrient-rich patches and their rooting depth. We found remarkable diversity in root system shapes, from cylindrical to conical. Interspecific differences in rooting depths in pots were the main determinant of rooting depths in the field, whereas differences in foraging ability played only a minor role. Although some species with strong foraging ability did place their roots into nutrient-rich soil layers, it was not a universal pattern. The results imply that although the vertical differentiation of grassland species is pronounced, it is primarily not driven by the differential plastic response of species to soil nutrient gradients. This may constrain the coexistence of species with similar rooting depths and may instead favour coexistence of species differing in their architectural blueprints.
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Affiliation(s)
- Tomáš Herben
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic
| | - Jan Šašek
- Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-128 01, Praha 2, Czech Republic
| | - Tereza Balšánková
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - Věroslava Hadincová
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - František Krahulec
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
| | - Karol Krak
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences, Kamýcká 129, CZ-165 21, Praha 6 - Suchdol, Czech Republic
| | - Sylvie Pecháčková
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
- The West Bohemian Museum in Pilsen, Kopeckého sady 2, 301 00, Plzeň, Czech Republic
| | - Hana Skálová
- Institute of Botany, Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
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6
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Root Foraging Strategy Improves the Adaptability of Tea Plants (Camellia sinensis L.) to Soil Potassium Heterogeneity. Int J Mol Sci 2022; 23:ijms23158585. [PMID: 35955715 PMCID: PMC9369073 DOI: 10.3390/ijms23158585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/29/2022] [Accepted: 07/30/2022] [Indexed: 01/27/2023] Open
Abstract
Root foraging enables plants to obtain more soil nutrients in a constantly changing nutrient environment. Little is known about the adaptation mechanism of adventitious roots of plants dominated by asexual reproduction (such as tea plants) to soil potassium heterogeneity. We investigated root foraging strategies for K by two tea plants (low-K tolerant genotype “1511” and low-K intolerant genotype “1601”) using a multi-layer split-root system. Root exudates, root architecture and transcriptional responses to K heterogeneity were analyzed by HPLC, WinRHIZO and RNA-seq. With the higher leaf K concentrations and K biological utilization indexes, “1511” acclimated to K heterogeneity better than “1601”. For “1511”, maximum total root length and fine root length proportion appeared on the K-enriched side; the solubilization of soil K reached the maximum on the low-K side, which was consistent with the amount of organic acids released through root exudation. The cellulose decomposition genes that were abundant on the K-enriched side may have promoted root proliferation for “1511”. This did not happen in “1601”. The low-K tolerant tea genotype “1511” was better at acclimating to K heterogeneity, which was due to a smart root foraging strategy: more roots (especially fine roots) were developed in the K-enriched side; more organic acids were secreted in the low-K side to activate soil K and the root proliferation in the K-enriched side might be due to cellulose decomposition. The present research provides a practical basis for a better understanding of the adaptation strategies of clonal woody plants to soil nutrient availability.
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Stiblíková P, Klimeš A, Cahill JF, Koubek T, Weiser M. Interspecific differences in root foraging precision cannot be directly inferred from species' mycorrhizal status or fine root economics. OIKOS 2022. [DOI: 10.1111/oik.08995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
| | - Adam Klimeš
- Dept of Functional Ecology, Inst. of Botany, Czech Academy of Sciences Třeboň Czechia
- Dept of Biological Sciences, Biological Sciences Building, Univ. of Alberta Edmonton AB Canada
| | - James F. Cahill
- Dept of Biological Sciences, Faculty of Mathematics and Natural Sciences, Univ. of Bergen Bergen Norway
| | - Tomáš Koubek
- Dept of Botany, Faculty of Science, Charles Univ. Praha Czechia
| | - Martin Weiser
- Dept of Botany, Faculty of Science, Charles Univ. Praha Czechia
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Dallstream C, Weemstra M, Soper FM. A framework for fine‐root trait syndromes: syndrome coexistence may support phosphorus partitioning in tropical forests. OIKOS 2022. [DOI: 10.1111/oik.08908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Monique Weemstra
- Ecology and Evolutionary Biology, Univ. of Michigan Ann Arbor MI USA
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9
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Marín C, Godoy R, Rubio J. Gaps in South American Mycorrhizal Biodiversity and Ecosystem Function Research. Fungal Biol 2022. [DOI: 10.1007/978-3-031-12994-0_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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10
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Alsherif EA, Al-Shaikh TM, Almaghrabi O, AbdElgawad H. High Redox Status as the Basis for Heavy Metal Tolerance of Sesuvium portulacastrum L. Inhabiting Contaminated Soil in Jeddah, Saudi Arabia. Antioxidants (Basel) 2021; 11:antiox11010019. [PMID: 35052523 PMCID: PMC8773048 DOI: 10.3390/antiox11010019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/15/2021] [Accepted: 12/21/2021] [Indexed: 12/19/2022] Open
Abstract
Because sewage sludge is contaminated with heavy metals, its disposal in the soil may pose risks to the ecosystem. Thus, heavy metal remediation is necessary to reduce the associated risks. The goal of this research is to introduce a heavy metal resistant species and to assess its phytoremediation, oxidative damage markers and stress tolerance mechanisms. To this end, field research was done to compare the vegetation of polluted sites to that of a healthy site. We found 42 plant species identified in the study, Sesuvium portulacastrum L. was chosen because of its high relative density (10.3) and maximum frequency (100 percent) in the most contaminated areas. In particular, S. portulacastrum plants were characterized by strong Cu, Ni, and As uptake. At the organ level, to control growth reduction and oxidase damage, particularly in roots, increased detoxification (e.g., metallothionein, phytochelatins) and antioxidants mechanisms (e.g., tocopherols, glutathione, peroxidases). On the other hand, flavonoids content and the activity of glutathione-S transferase, glutathione reductase and dehydroascorbate reductase were increased manly in the shoots. These biochemical markers can be applied to select tolerance plant species grown under complex heavy metal contamination. Our findings also introduced S. portulacastrum to reduce soil contamination0associated risks, making the land resource available for agricultural production.
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Affiliation(s)
- Emad A. Alsherif
- Biology Department, College of Science and Arts at Khulis, University of Jeddah, Jeddah 21959, Saudi Arabia;
- Correspondence:
| | - Turki M. Al-Shaikh
- Biology Department, College of Science and Arts at Khulis, University of Jeddah, Jeddah 21959, Saudi Arabia;
| | - Omar Almaghrabi
- Department of Biology, College of Science, University of Jeddah, Jeddah 21959, Saudi Arabia;
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, 2020 Antwerp, Belgium;
- Department of Botany and Microbiology, Faculty of Science, Beni-Suef University, Beni Suef 62511, Egypt
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11
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The genetic basis of the root economics spectrum in a perennial grass. Proc Natl Acad Sci U S A 2021; 118:2107541118. [PMID: 34799444 DOI: 10.1073/pnas.2107541118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2021] [Indexed: 11/18/2022] Open
Abstract
Construction economics of plant roots exhibit predictable relationships with root growth, death, and nutrient uptake strategies. Plant taxa with inexpensively constructed roots tend to more precisely explore nutrient hotspots than do those with costly constructed roots but at the price of more frequent tissue turnover. This trade-off underlies an acquisitive to conservative continuum in resource investment, described as the "root economics spectrum (RES)." Yet the adaptive role and genetic basis of RES remain largely unclear. Different ecotypes of switchgrass (Panicum virgatum) display root features exemplifying the RES, with costly constructed roots in southern lowland and inexpensively constructed roots in northern upland ecotypes. We used an outbred genetic mapping population derived from lowland and upland switchgrass ecotypes to examine the genetic architecture of the RES. We found that absorptive roots (distal first and second orders) were often "deciduous" in winter. The percentage of overwintering absorptive roots was decreased by northern upland alleles compared with southern lowland alleles, suggesting a locally-adapted conservative strategy in warmer and acquisitive strategy in colder regions. Relative turnover of absorptive roots was genetically negatively correlated with their biomass investment per unit root length, suggesting that the key trade-off in framing RES is genetically facilitated. We also detected strong genetic correlations among root morphology, root productivity, and shoot size. Overall, our results reveal the genetic architecture of multiple traits that likely impacts the evolution of RES and plant aboveground-belowground organization. In practice, we provide genetic evidence that increasing switchgrass yield for bioenergy does not directly conflict with enhancing its root-derived carbon sequestration.
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12
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Liu B, Han F, Xing K, Zhang A, Rengel Z. The Response of Plants and Mycorrhizal Fungi to Nutritionally-Heterogeneous Environments Are Regulated by Nutrient Types and Plant Functional Groups. FRONTIERS IN PLANT SCIENCE 2021; 12:734641. [PMID: 34868118 PMCID: PMC8634332 DOI: 10.3389/fpls.2021.734641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/15/2021] [Indexed: 06/13/2023]
Abstract
Nutrient type and plant functional group are both important in influencing proliferation of roots or hyphae and their benefit to plant growth in nutritionally heterogeneous environments. However, the studies quantifying relative importance of roots vs. hyphae affecting the plant response to nutrient heterogeneity are lacking. Here, we used meta-analysis based on 879 observations from 66 published studies to evaluate response patterns of seven variables related to growth and morphological traits of plants and mycorrhizal fungi in nutritionally heterogeneous environments. We found that phosphorus [P] and organic fertilizer [OF] supply significantly increased shoot (+18.1 and +25.9%, respectively) and root biomass (+31.1 and +23.0%, respectively) and root foraging precision (+11.8 and +20.4%, respectively). However, there was no significant difference among functional groups of herbs (grasses, forbs, and legumes), between herbs and woody species, and between arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) tree species in the shoot, root and mycorrhizal fungi responses to nutrient heterogeneity, except for root biomass and root foraging precision among grasses, forbs, and legumes, and mycorrhizal hyphal foraging precision between AM and ECM tree species. Root diameter was uncorrelated with neither root foraging precision nor mycorrhizal hyphal foraging precision, regardless of mycorrhizal type or nutrient type. These results suggest that plant growth and foraging strategies are mainly influenced by nutrient type, among other factors including plant functional type and mycorrhizal type.
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Affiliation(s)
- Bitao Liu
- College of Forestry, Shanxi Agricultural University, Taigu, China
| | - Fei Han
- College of Forestry, Shanxi Agricultural University, Taigu, China
| | - Kaixiong Xing
- Center for Forest Ecosystem Studies and Qianyanzhou Ecological Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China
| | - Aiping Zhang
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zed Rengel
- Soil Science and Plant Nutrition, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
- Institute for Adriatic Crops and Karst Reclamation, Split, Croatia
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13
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Beidler KV, Oh YE, Pritchard SG, Phillips RP. Mycorrhizal roots slow the decay of belowground litters in a temperate hardwood forest. Oecologia 2021; 197:743-755. [PMID: 34626268 DOI: 10.1007/s00442-021-05051-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 09/26/2021] [Indexed: 11/24/2022]
Abstract
There is increasing evidence that plant roots and mycorrhizal fungi, whether living or dead, play a central role in soil carbon (C) cycling. Root-mycorrhizal-microbial interactions can both suppress and enhance litter decay, with the net result dependent upon belowground nutrient acquisition strategies and soil nutrient availability. We measured the net effect of living roots and mycorrhizal fungi on the decay of dead roots and fungal hyphae in a hardwood forest dominated by either sugar maple (Acer saccharum) or white oak (Quercus alba) trees. Root and fungal litter were allowed to decompose within root-ingrowth bags and root-exclusion cores. In conjunction with root effects on decay, we assessed foraging responses and root induced changes in soil moisture, nitrogen (N) availability and enzyme activity. After 1 year, maple root production increased, and mycorrhizal fungal colonization decreased in the presence of decaying litter. In addition, we found that actively foraging roots suppressed the decay of root litter (- 14%) more than fungal litter (- 3%), and suppression of root decay was stronger for oak (- 20%) than maple roots (- 8%). Suppressive effects of oak roots on decay were greatest when roots also reduced soil N availability, which corresponded with reductions in hydrolytic enzyme activity and enhanced oxidative enzyme activities. These findings further our understanding of context-dependent drivers of root-mycorrhizal-microbial interactions and demonstrate that such interactions can play an underappreciated role in soil organic matter accumulation and turnover in temperate forests.
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Affiliation(s)
- Katilyn V Beidler
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA.
| | - Young E Oh
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
| | - Seth G Pritchard
- Department of Biology, College of Charleston, Charleston, SC, 29424, USA
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14
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Ren J, Fang S, Lin G, Lin F, Yuan Z, Ye J, Wang X, Hao Z, Fortunel C. Tree growth response to soil nutrients and neighborhood crowding varies between mycorrhizal types in an old-growth temperate forest. Oecologia 2021; 197:523-535. [PMID: 34542674 DOI: 10.1007/s00442-021-05034-2] [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: 04/30/2021] [Accepted: 09/06/2021] [Indexed: 10/20/2022]
Abstract
Forest dynamics are shaped by both abiotic and biotic factors. Trees associating with different types of mycorrhizal fungi differ in nutrient use and dominate in contrasting environments, but it remains unclear whether they exhibit differential growth responses to local abiotic and biotic gradients where they co-occur. We used 9-year tree census data in a 25-ha old-growth temperate forest in Northeast China to examine differences in tree growth response to soil nutrients and neighborhood crowding between tree species associating with arbuscular mycorrhizal (AM), ectomycorrhizal (EM), and dual-mycorrhizal (AEM) fungi. In addition, we tested the role of individual-level vs species-level leaf traits in capturing differences in tree growth response to soil nutrients and neighborhood crowding across mycorrhizal types. Across 25 species, soil nutrients decreased AM tree growth, while neighborhood crowding reduced both AM and EM tree growth, and neither soil nor neighbors impacted AEM tree growth. Across mycorrhizal types, individual-level traits were stronger predictors of tree growth than species-level traits. However, most traits poorly mediated tree growth response to soil nutrients and neighborhood crowding. Our findings indicate that mycorrhizal types strongly shape differences in tree growth response to local soil and crowding gradients, and suggest that including plant-mycorrhizae associations in future work offers great potential to improve our understanding of forest dynamics.
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Affiliation(s)
- Jing Ren
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,AMAP (Botanique et Modélisation de l'Architecture des Plantes et des Végétations), Université de Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, France
| | - Shuai Fang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Guigang Lin
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Fei Lin
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Zuoqiang Yuan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Ji Ye
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Xugao Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China
| | - Zhanqing Hao
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China. .,Research Center for Ecological and Environmental Sciences, Northwestern Polytechnical University, Xi'an, 710072, China.
| | - Claire Fortunel
- AMAP (Botanique et Modélisation de l'Architecture des Plantes et des Végétations), Université de Montpellier, CIRAD, CNRS, INRAE, IRD, Montpellier, France.
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15
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Luo W, Ni M, Wang Y, Lan R, Eissenstat DM, Cahill JF, Li B, Chu C. Limited evidence of vertical fine-root segregation in a subtropical forest. THE NEW PHYTOLOGIST 2021; 231:2308-2318. [PMID: 34110016 DOI: 10.1111/nph.17546] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
Vertical root segregation and the resulting niche partitioning can be a key underpinning of species coexistence. This could result from substantial interspecific variations in root profiles and rooting plasticity in response to soil heterogeneity and neighbours, but they remain largely untested in forest communities. In a diverse forest in subtropical China, we randomly sampled > 4000 root samples from 625 0-30 cm soil profiles. Using morphological and DNA-based methods, we identified 109 woody plant species, determined the degree of vertical fine-root segregation, and examined rooting plasticity in response to soil heterogeneity and neighbour structure. We found no evidence of vertical fine-root segregation among cooccurring species. By contrast, root abundance of different species tended to be positively correlated within soil zones. Underlying these findings was a lack of interspecific variation in fine-root profiles with over 90% of species concentrated in the 0-10 cm soil zone with only one species dominating in the 10-20 cm soil zone. Root profiles exhibited low responsiveness to root neighbours but tended to be shallow in soils with low phosphorus and copper content. These findings suggest that if there is niche differentiation leading to coexistence in this diverse forest, it would be occurring by mechanisms other than vertical fine-root segregation.
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Affiliation(s)
- Wenqi Luo
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
- Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA, 16802, USA
| | - Ming Ni
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
- Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, J1K 2R1, Canada
| | - Youshi Wang
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Runxuan Lan
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
| | - David M Eissenstat
- Department of Ecosystem Science and Management, The Pennsylvania State University, University Park, PA, 16802, USA
| | - James F Cahill
- Department of Biological Sciences, University of Alberta, Edmonton, AB, T6G 2E9, Canada
| | - Buhang Li
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Chengjin Chu
- State Key Laboratory of Biocontrol, School of Life Sciences and School of Ecology, Sun Yat-sen University, Guangzhou, 510275, China
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16
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Ferlian O, Goldmann K, Eisenhauer N, Tarkka MT, Buscot F, Heintz-Buschart A. Distinct effects of host and neighbour tree identity on arbuscular and ectomycorrhizal fungi along a tree diversity gradient. ISME COMMUNICATIONS 2021; 1:40. [PMID: 37938639 PMCID: PMC9723774 DOI: 10.1038/s43705-021-00042-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 08/02/2021] [Accepted: 08/05/2021] [Indexed: 04/26/2023]
Abstract
Plant diversity and plant-related ecosystem functions have been important in biodiversity-ecosystem functioning studies. However, biotic interactions with mycorrhizal fungi have been understudied although they are crucial for plant-resource acquisition. Here, we investigated the effects of tree species richness and tree mycorrhizal type on arbuscular (AMF) and ectomycorrhizal fungal (EMF) communities. We aimed to understand how dissimilarities in taxa composition and beta-diversity are related to target trees and neighbours of the same or different mycorrhizal type. We sampled a tree diversity experiment with saplings (~7 years old), where tree species richness (monocultures, 2-species, and 4-species mixtures) and mycorrhizal type were manipulated. AMF and EMF richness significantly increased with increasing tree species richness. AMF richness of mixture plots resembled that of the sum of the respective monocultures, whereas EMF richness of mixture plots was lower compared to the sum of the respective monocultures. Specialisation scores revealed significantly more specialised AMF than EMF suggesting that, in contrast to previous studies, AMF were more specialised, whereas EMF were not. We further found that AMF communities were little driven by the surrounding trees, whereas EMF communities were. Our study revealed drivers of mycorrhizal fungal communities and further highlights the distinct strategies of AMF and EMF.
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Affiliation(s)
- Olga Ferlian
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, Germany.
- Institute of Biology, Leipzig University, Puschstrasse 4, Leipzig, Germany.
| | - Kezia Goldmann
- Department Soil Ecology, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Straße 4, Halle (Saale), Germany
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, Germany
- Institute of Biology, Leipzig University, Puschstrasse 4, Leipzig, Germany
| | - Mika T Tarkka
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, Germany
- Department Soil Ecology, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Straße 4, Halle (Saale), Germany
| | - François Buscot
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, Germany
- Department Soil Ecology, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Straße 4, Halle (Saale), Germany
| | - Anna Heintz-Buschart
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, Leipzig, Germany
- Department Soil Ecology, UFZ - Helmholtz Centre for Environmental Research, Theodor-Lieser-Straße 4, Halle (Saale), Germany
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17
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Wambsganss J, Freschet GT, Beyer F, Goldmann K, Prada‐Salcedo LD, Scherer‐Lorenzen M, Bauhus J. Tree species mixing causes a shift in fine‐root soil exploitation strategies across European forests. Funct Ecol 2021. [DOI: 10.1111/1365-2435.13856] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Janna Wambsganss
- Chair of Silviculture Faculty of Environment and Natural Resources University of Freiburg Freiburg Germany
- Geobotany Faculty of Biology University of Freiburg Freiburg Germany
| | - Grégoire T. Freschet
- Station d'Ecologie Théorique et Expérimentale CNRSUniversité Toulouse III Moulis France
| | - Friderike Beyer
- Chair of Silviculture Faculty of Environment and Natural Resources University of Freiburg Freiburg Germany
| | - Kezia Goldmann
- Department of Soil Ecology Helmholtz Centre for Environmental Research—UFZ Halle/Saale Germany
| | | | | | - Jürgen Bauhus
- Chair of Silviculture Faculty of Environment and Natural Resources University of Freiburg Freiburg Germany
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18
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Liang M, Shi L, Burslem DFRP, Johnson D, Fang M, Zhang X, Yu S. Soil fungal networks moderate density-dependent survival and growth of seedlings. THE NEW PHYTOLOGIST 2021; 230:2061-2071. [PMID: 33506513 DOI: 10.1111/nph.17237] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 01/21/2021] [Indexed: 06/12/2023]
Abstract
Pathogenic and mutualistic fungi have contrasting effects on seedling establishment, but it remains unclear whether density-dependent survival and growth are regulated by access to different types of mycorrhizal fungal networks supported by neighbouring adult trees. Here, we conducted an extensive field survey to test how mycorrhizal and pathogenic fungal colonization of arbuscular mycorrhizal (AM) and ectomycorrhizal (ECM) seedlings in a subtropical forest respond to density of neighbouring adult trees. In addition, we undertook a hyphal exclusion experiment to explicitly test the role of soil fungal networks in driving density-dependent effects on seedling growth and survival. Conspecific adult density was a strong predictor for the relative abundance of putative pathogens, which was greater in roots of AM than of ECM seedlings, while mycorrhizal fungal abundance and colonization were not consistently affected by conspecific adult density. Both ECM and AM fungal networks counteracted conspecific density-dependent mortality, but ECM fungi were more effective at weakening the negative effects of high seedling density than AM fungi. Our findings reveal a critical role of common fungal networks in mitigating negative density-dependent effects of pathogenic fungi on seedling establishment, which provides mechanistic insights into how soil fungal diversity shapes plant community structure in subtropical forests.
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Affiliation(s)
- Minxia Liang
- Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, 510275, China
| | - Liuqing Shi
- Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, 510275, China
| | - David F R P Burslem
- School of Biological Sciences, University of Aberdeen, Aberdeen, AB24 3UU, UK
| | - David Johnson
- Department of Earth and Environmental Sciences, The University of Manchester, Manchester, M13 9PT, UK
| | - Miao Fang
- Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, 510275, China
| | - Xinyi Zhang
- Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, 510275, China
| | - Shixiao Yu
- Department of Ecology, School of Life Sciences/State Key Laboratory of Biocontrol, Sun Yat-sen University, Guangzhou, 510275, China
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19
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Chen L, Jiang C, Wang X, Feng Q, Liu X, Tang Z, Sun OJ. Nutrient trade-offs mediated by ectomycorrhizal strategies in plants: Evidence from an Abies species in subalpine forests. Ecol Evol 2021; 11:5281-5294. [PMID: 34026006 PMCID: PMC8131813 DOI: 10.1002/ece3.7417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 02/09/2021] [Accepted: 02/12/2021] [Indexed: 11/09/2022] Open
Abstract
Ectomycorrhizal (ECM) symbiosis is an evolutionary biological trait of higher plants for effective nutrient uptakes. However, little is known that how the formation and morphological differentiations of ECM roots mediate the nutrients of below- and aboveground plant tissues and the balance among nutrient elements across environmental gradients. Here, we investigated the effects of ECM foraging strategies on root and foliar N and P concentrations and N:P ratio Abies faxoniana under variations of climate and soil conditions.The ECM symbionts preferentially mediated P uptake under both N and P limitations. The uptake efficiency of N and P was primarily associated with the ECM root traits, for example, ECM root tip density, superficial area of ECM root tips, and the ratio of living to dead root tips, and was affected by the ECM proliferations and morphological differentiations. The tissue N and P concentrations were positively associated with the abundance of the contact exploration type and negatively with that of the short-distance exploration type.Our findings indicate that the nutritional status of both below- and aboveground plant tissues can be strongly affected by ECM symbiosis in natural environments. Variations in the ECM strategies in response to varying environmental conditions significantly influence plant nutrient uptakes and trade-offs.
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Affiliation(s)
- Lulu Chen
- School of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Institute of Forestry and Climate Change ResearchBeijing Forestry UniversityBeijingChina
| | - Chao Jiang
- School of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Institute of Forestry and Climate Change ResearchBeijing Forestry UniversityBeijingChina
| | - Xiangping Wang
- School of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Institute of Forestry and Climate Change ResearchBeijing Forestry UniversityBeijingChina
| | - Qiuhong Feng
- Sichuan Wolong Forest Ecosystem Research StationSichuan Academy of ForestryChengduChina
- Ecological Restoration and Conservation on Forest and Wetland Key Laboratory of Sichuan ProvinceSichuan Academy of ForestryChengduChina
| | - Xingliang Liu
- Sichuan Wolong Forest Ecosystem Research StationSichuan Academy of ForestryChengduChina
- Ecological Restoration and Conservation on Forest and Wetland Key Laboratory of Sichuan ProvinceSichuan Academy of ForestryChengduChina
| | - Zuoxin Tang
- College of Agricultural and Life SciencesKunming UniversityKunmingChina
| | - Osbert Jianxin Sun
- School of Ecology and Nature ConservationBeijing Forestry UniversityBeijingChina
- Institute of Forestry and Climate Change ResearchBeijing Forestry UniversityBeijingChina
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20
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Netherway T, Bengtsson J, Krab EJ, Bahram M. Biotic interactions with mycorrhizal systems as extended nutrient acquisition strategies shaping forest soil communities and functions. Basic Appl Ecol 2021. [DOI: 10.1016/j.baae.2020.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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21
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Jiang L, Wang H, Li S, Fu X, Dai X, Yan H, Kou L. Mycorrhizal and environmental controls over root trait-decomposition linkage of woody trees. THE NEW PHYTOLOGIST 2021; 229:284-295. [PMID: 32761622 DOI: 10.1111/nph.16844] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/21/2020] [Indexed: 06/11/2023]
Abstract
Traits are critical in predicting decomposition that fuels carbon and nutrient cycling in ecosystems. However, our understanding of root trait-decomposition linkage, and especially its dependence on mycorrhizal type and environmental context, remains limited. We explored the control of morphological and chemical (carbon- and nutrient-related) traits over decomposition of absorptive roots in 30 tree species associated with either arbuscular mycorrhizal (AM) or ectomycorrhizal (ECM) fungi in temperate and subtropical forests in China. Carbon-related traits (acid-unhydrolysable residue (AUR) and cellulose concentrations) had predominant control of root decomposition in AM species while nutrient-related traits (magnesium concentration) predominately controlled that in ECM species. Thicker absorptive roots decomposed faster in AM species as a result of their lower AUR concentrations, but more slowly in ECM angiosperm species potentially as a result of their higher magnesium concentrations. Root decomposition was linked to root nutrient economy in both forests while root diameter-decomposition coordination emerged only in the subtropical forest where root diameter and decomposition presented similar cross-species variations. Our findings suggest that root trait-decomposition linkages differ strongly with mycorrhizal type and environment, and that root diameter can predict decomposition but in opposing directions and with contrasting mechanisms for AM and ECM species.
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Affiliation(s)
- Lei Jiang
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Huimin Wang
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shenggong Li
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoli Fu
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiaoqin Dai
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Han Yan
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Liang Kou
- Qianyanzhou Ecological Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100049, China
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22
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Chen W, Tape KD, Euskirchen ES, Liang S, Matos A, Greenberg J, Fraterrigo JM. Impacts of Arctic Shrubs on Root Traits and Belowground Nutrient Cycles Across a Northern Alaskan Climate Gradient. FRONTIERS IN PLANT SCIENCE 2020; 11:588098. [PMID: 33362815 PMCID: PMC7758488 DOI: 10.3389/fpls.2020.588098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Deciduous shrubs are expanding across the graminoid-dominated nutrient-poor arctic tundra. Absorptive root traits of shrubs are key determinants of nutrient acquisition strategy from tundra soils, but the variations of shrub root traits within and among common shrub genera across the arctic climatic gradient are not well resolved. Consequently, the impacts of arctic shrub expansion on belowground nutrient cycling remain largely unclear. Here, we collected roots from 170 plots of three commonly distributed shrub genera (Alnus, Betula, and Salix) and a widespread sedge (Eriophorum vaginatum) along a climatic gradient in northern Alaska. Absorptive root traits that are relevant to the strategy of plant nutrient acquisition were determined. The influence of aboveground dominant vegetation cover on the standing root biomass, root productivity, vertical rooting profile, as well as the soil nitrogen (N) pool in the active soil layer was examined. We found consistent root trait variation among arctic plant genera along the sampling transect. Alnus and Betula had relatively thicker and less branched, but more frequently ectomycorrhizal colonized absorptive roots than Salix, suggesting complementarity between root efficiency and ectomycorrhizal dependence among the co-existing shrubs. Shrub-dominated plots tended to have more productive absorptive roots than sedge-dominated plots. At the northern sites, deep absorptive roots (>20 cm depth) were more frequent in birch-dominated plots. We also found shrub roots extensively proliferated into the adjacent sedge-dominated plots. The soil N pool in the active layer generally decreased from south to north but did not vary among plots dominated by different shrub or sedge genera. Our results reveal diverse nutrient acquisition strategies and belowground impacts among different arctic shrubs, suggesting that further identifying the specific shrub genera in the tundra landscape will ultimately provide better predictions of belowground dynamics across the changing arctic.
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Affiliation(s)
- Weile Chen
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Ken D. Tape
- Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
| | - Eugénie S. Euskirchen
- Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, United States
| | - Shuang Liang
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
- College of Life Sciences, Zhejiang University, Hangzhou, China
| | - Adriano Matos
- Department of Natural Resources and Environmental Science, University of Nevada, Reno, Reno, NV, United States
| | - Jonathan Greenberg
- Department of Natural Resources and Environmental Science, University of Nevada, Reno, Reno, NV, United States
| | - Jennifer M. Fraterrigo
- Department of Natural Resources and Environmental Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, United States
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23
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McCormack ML, Kaproth MA, Cavender-Bares J, Carlson E, Hipp AL, Han Y, Kennedy PG. Climate and phylogenetic history structure morphological and architectural trait variation among fine-root orders. THE NEW PHYTOLOGIST 2020; 228:1824-1834. [PMID: 32654151 DOI: 10.1111/nph.16804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 06/30/2020] [Indexed: 06/11/2023]
Abstract
Fine roots mediate below-ground resource acquisition, yet understanding of how fine-root functional traits vary along environmental gradients, within branching orders and across phylogenetic scales remains limited. Morphological and architectural fine-root traits were measured on individual root orders of 20 oak species (genus Quercus) from divergent climates of origin that were harvested after three growing seasons in a glasshouse. These were then compared with similar measurements obtained from a phylogenetically diverse dataset of woody species from the Fine-Root Ecology Database (FRED). For the oaks, only precipitation seasonality and growing season moisture availability were correlated to aspects of root diameter and branching. Strong correlations among root diameters and architecture of different branch orders were common, while correlations between diameter and length were weakly negative. By contrast, the FRED dataset showed strong positive correlations between diameter and length and fewer correlations between root diameter and architectural traits. Our findings suggest that seasonal patterns of water availability are more important drivers of root adaptation in oaks than annual averages in precipitation and temperature. Furthermore, contrasting patterns of trait relationships between the oak and FRED datasets suggest that branching patterns are differentially constrained at narrow vs broad phylogenetic scales.
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Affiliation(s)
- M Luke McCormack
- Center for Tree Science, The Morton Arboretum, Lisle, IL, 60523, USA
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Matthew A Kaproth
- Department of Biological Sciences, Minnesota State University Mankato, Mankato, MN, 56001, USA
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, MN, 55108, USA
| | - Jeannine Cavender-Bares
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, MN, 55108, USA
| | - Eva Carlson
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
| | - Andrew L Hipp
- Center for Tree Science, The Morton Arboretum, Lisle, IL, 60523, USA
- The Field Museum, Chicago, IL, 60605, USA
| | - Ying Han
- School of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Peter G Kennedy
- Department of Plant and Microbial Biology, University of Minnesota, St Paul, MN, 55108, USA
- Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, MN, 55108, USA
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Zhu R, Liu J, Wang J, Han W, Shen Z, Muraina TO, Chen J, Sun D. Comparison of soil microbial community between reseeding grassland and natural grassland in Songnen Meadow. Sci Rep 2020; 10:16884. [PMID: 33037306 PMCID: PMC7547709 DOI: 10.1038/s41598-020-74023-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 09/18/2020] [Indexed: 11/23/2022] Open
Abstract
Microorganisms have important ecological functions in ecosystems. Reseeding is considered as one of the main strategies for preventing grassland degradation in China. However, the response of soil microbial community and diversity to reseeding grassland (RG) and natural grassland (NG) remains unclear, especially in the Songnen Meadow. In this study, the soil microbial community compositions of two vegetation restoration types (RG vs NG) were analyzed using a high-throughput sequencing technique. A total of 23,142 microbial OTUs were detected, phylogenetically derived from 11 known bacterial phyla. Soil advantage categories included Proteobacteria, Acidobacteria, Actinobacteria, and Bacteroidetes, which together accounted for > 78% of the all phyla in vegetation restoration. The soil microbial diversity was higher in RG than in NG. Two types of vegetation restoration had significantly different characteristics of soil microbial community (P < 0.001). Based on a molecular ecological network analysis, we found that the network in RG had a longer average path distance and modularity than in NG network, making it more resilient to environment changes. Meanwhile, the results of the canonical correspondence analysis and molecular ecological network analysis showed that soil pH (6.34 ± 0.35 in RG and 7.26 ± 0.28 in NG) was the main factor affecting soil microbial community structure, followed by soil moisture (SM) in the Songnen meadow, China. Besides, soil microbial community characteristics can vary significantly in different vegetation restoration. Thus, we suggested that it was necessary and reasonable for this area to popularize reseeding grassland in the future.
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Affiliation(s)
- Ruifen Zhu
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China
| | - Jielin Liu
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China
| | - Jianli Wang
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China
| | - Weibo Han
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China
| | - Zhongbao Shen
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China
| | - Taofeek O Muraina
- National Hulunber Grassland Ecosystem Observation and Research Station, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, 10008, China
- Department of Animal Health and Production, Oyo State College of Agriculture and Technology, P.M.B. 10, Igbo-Ora, Oyo State, Nigeria
| | - Jishan Chen
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China.
| | - Dequan Sun
- Institute of Pratacultural Science, Heilongjiang Academy of Agricultural Sciences, 368 Xue Fu Road, Nangang District, Harbin, 150086, China.
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25
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Šmilauer P, Šmilauerová M, Kotilínek M, Košnar J. Foraging speed and precision of arbuscular mycorrhizal fungi under field conditions: An experimental approach. Mol Ecol 2020; 29:1574-1587. [DOI: 10.1111/mec.15425] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 03/18/2020] [Accepted: 03/24/2020] [Indexed: 01/13/2023]
Affiliation(s)
- Petr Šmilauer
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
| | - Marie Šmilauerová
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
| | - Milan Kotilínek
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
| | - Jiří Košnar
- Faculty of Science University of South Bohemia České Budějovice Czech Republic
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26
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Yang Y, Cheng H, Dou Y, An S. Plant and soil traits driving soil fungal community due to tree plantation on the Loess Plateau. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 708:134560. [PMID: 31780176 DOI: 10.1016/j.scitotenv.2019.134560] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2019] [Revised: 08/31/2019] [Accepted: 09/18/2019] [Indexed: 06/10/2023]
Abstract
It is widely accepted that soil fungi plays a crucial role in biogchemical cycle in terrestrial ecosystems, and soil fungal community can be shaped by plant and soil traits; however, we still know very little about the combined impacts of plant and soil traits on soil fungal community due to tree plantation, especially on the Loess Plateau. In doing so, we provided a conceptual framework bridging knowledge on plant, soil traits and soil fungal community, which tested the combined impacts of plant and soil traits on soil fungal community due to tree plantation compared with natural restoration (CK) on the Loess Plateau. There was a disproportionate influence of tree plantation on soil fungal community by using nonmetric multidimensional scaling (NMDS) (p < 0.05) and the interaction networks. Additionally, soil organic carbon (SOC), soil pH, C/N, biomass in litter and root were highly related to the dominant soil fungal community (such as Ascomycota and Basidiomycota), which can be considered as the main drivers for soil fungal community. Most importantly, litter traits and root traits were considered as the key predictors in shaping soil fungal community in terms of tree plantation (especially litter and root C/N), while soil traits and root traits were considered as the key predictors in terms of natural restoration. Besides, structural equation modeling (SEM) indicated that soil fungal community was co-mediated by soil and plant traits due to tree plantation, and the total effects of soil traits, plant traits, litter traits and root traits on soil fungal community were higher in tree plantation, suggesting that tree plantation had a large effect on soil fungal community compared to natural restoration. Finally, we build a conceptual framework to clarify the combined impacts of plant and soil traits on soil fungal community, providing a new sight to understand the crucial role of plant and soil traits in shaping soil fungal community due to tree plantation, and the interactions among plant and soil and also soil fungal community need further studies.
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Affiliation(s)
- Yang Yang
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an 710061, China
| | - Huan Cheng
- Department of Biology, University of Maryland, College Park, MD 20742, USA
| | - Yanxing Dou
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China
| | - Shaoshan An
- State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China.
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27
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Mao Z, Corrales A, Zhu K, Yuan Z, Lin F, Ye J, Hao Z, Wang X. Tree mycorrhizal associations mediate soil fertility effects on forest community structure in a temperate forest. THE NEW PHYTOLOGIST 2019; 223:475-486. [PMID: 30762231 DOI: 10.1111/nph.15742] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Accepted: 02/08/2019] [Indexed: 05/12/2023]
Abstract
Soil fertility influences plant community structure, yet few studies have focused on how this influence is affected by the type of mycorrhizal association formed by tree species within local communities. We examined the relationship of aboveground biomass (AGB) and diversity of adult trees with soil fertility (nitrogen, phosphorus, organic matter, etc.) in the context of different spatial distributions of arbuscular mycorrhizal (AM) and ectomycorrhizal (EM) trees in a temperate forest in Northeast China. Diversity showed a positive trend along the soil fertility gradient driven mostly by a positive relationship between AM tree abundance and soil fertility. By contrast, the AGB showed a negative trend along the soil fertility gradient driven mostly by a negative relationship between EM tree AGB and soil fertility. Furthermore, the opposite trend in the AGB and tree species diversity along the soil fertility gradient led to an overall negative diversity-biomass relationship at the 50-m scale but not the 20-m scale. These results suggest that tree mycorrhizal associations play a critical role in driving forest community structure along soil fertility gradients and highlight the importance of tree mycorrhizal associations in influencing how the diversity-ecosystem function (e.g. biomass) relationships change with soil fertility.
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Affiliation(s)
- Zikun Mao
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Adriana Corrales
- Programa de Biología, Facultad de Ciencias Naturales y Matemáticas, Universidad del Rosario, Cr. 24 # 63C-69, Bogotá, D.C., 111221, Colombia
| | - Kai Zhu
- Department of Environmental Studies, University of California, Santa Cruz, CA, 95064, USA
| | - Zuoqiang Yuan
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
| | - Fei Lin
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
| | - Ji Ye
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
| | - Zhanqing Hao
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
| | - Xugao Wang
- Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences, Shenyang, 110016, China
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28
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Bogar L, Peay K, Kornfeld A, Huggins J, Hortal S, Anderson I, Kennedy P. Plant-mediated partner discrimination in ectomycorrhizal mutualisms. MYCORRHIZA 2019; 29:97-111. [PMID: 30617861 DOI: 10.1007/s00572-018-00879-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 12/26/2018] [Indexed: 05/22/2023]
Abstract
Although ectomycorrhizal fungi have well-recognized effects on ecological processes ranging from plant community dynamics to carbon cycling rates, it is unclear if plants are able to actively influence the structure of these fungal communities. To address this knowledge gap, we performed two complementary experiments to determine (1) whether ectomycorrhizal plants can discriminate among potential fungal partners, and (2) to what extent the plants might reward better mutualists. In experiment 1, split-root Larix occidentalis seedlings were inoculated with spores from three Suillus species (S. clintonianus, S. grisellus, and S. spectabilis). In experiment 2, we manipulated the symbiotic quality of Suillus brevipes isolates on split-root Pinus muricata seedlings by changing the nitrogen resources available, and used carbon-13 labeling to track host investment in fungi. In experiment 1, we found that hosts can discriminate in multi-species settings. The split-root seedlings inhibited colonization by S. spectabilis whenever another fungus was available, despite similar benefits from all three fungi. In experiment 2, we found that roots and fungi with greater nitrogen supplies received more plant carbon. Our results suggest that plants may be able to regulate this symbiosis at a relatively fine scale, and that this regulation can be integrated across spatially separated portions of a root system.
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Affiliation(s)
- Laura Bogar
- Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA, 94305, USA.
| | - Kabir Peay
- Department of Biology, Stanford University, 371 Serra Mall, Stanford, CA, 94305, USA
| | - Ari Kornfeld
- Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, 94305, USA
| | - Julia Huggins
- Department of Plant & Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA
| | - Sara Hortal
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Ian Anderson
- Hawkesbury Institute for the Environment, Western Sydney University, Hawkesbury Campus, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Peter Kennedy
- Department of Plant & Microbial Biology, University of Minnesota, Saint Paul, MN, 55108, USA
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29
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Gil-Martínez M, López-García Á, Domínguez MT, Navarro-Fernández CM, Kjøller R, Tibbett M, Marañón T. Ectomycorrhizal Fungal Communities and Their Functional Traits Mediate Plant-Soil Interactions in Trace Element Contaminated Soils. FRONTIERS IN PLANT SCIENCE 2018; 9:1682. [PMID: 30515182 PMCID: PMC6255936 DOI: 10.3389/fpls.2018.01682] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 10/29/2018] [Indexed: 06/09/2023]
Abstract
There is an increasing consensus that microbial communities have an important role in mediating ecosystem processes. Trait-based ecology predicts that the impact of the microbial communities on ecosystem functions will be mediated by the expression of their traits at community level. The link between the response of microbial community traits to environmental conditions and its effect on plant functioning is a gap in most current microbial ecology studies. In this study, we analyzed functional traits of ectomycorrhizal fungal species in order to understand the importance of their community assembly for the soil-plant relationships in holm oak trees (Quercus ilex subsp. ballota) growing in a gradient of exposure to anthropogenic trace element (TE) contamination after a metalliferous tailings spill. Particularly, we addressed how the ectomycorrhizal composition and morphological traits at community level mediate plant response to TE contamination and its capacity for phytoremediation. Ectomycorrhizal fungal taxonomy and functional diversity explained a high proportion of variance of tree functional traits, both in roots and leaves. Trees where ectomycorrhizal fungal communities were dominated by the abundant taxa Hebeloma cavipes and Thelephora terrestris showed a conservative root economics spectrum, while trees colonized by rare taxa presented a resource acquisition strategy. Conservative roots presented ectomycorrhizal functional traits characterized by high rhizomorphs formation and low melanization which may be driven by resource limitation. Soil-to-root transfer of TEs was explained substantially by the ectomycorrhizal fungal species composition, with the highest transfer found in trees whose roots were colonized by Hebeloma cavipes. Leaf phosphorus was related to ectomycorrhizal species composition, specifically higher leaf phosphorus was related to the root colonization by Thelephora terrestris. These findings support that ectomycorrhizal fungal community composition and their functional traits mediate plant performance in metal-contaminated soils, and have a high influence on plant capacity for phytoremediation of contaminants. The study also corroborates the overall effects of ectomycorrhizal fungi on ecosystem functioning through their mediation over the plant economics spectrum.
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Affiliation(s)
- Marta Gil-Martínez
- Department for Protection of the Soil, Plant and Water System, Institute of Natural Resources and Agrobiology of Seville, Spanish National Research Council, Seville, Spain
| | | | - María T. Domínguez
- Área de Edafología y Química Agricola, Departamento de Cristalografía, Mineralogía y Química Agrícola, Universidad de Sevilla, Seville, Spain
| | - Carmen M. Navarro-Fernández
- Department for Protection of the Soil, Plant and Water System, Institute of Natural Resources and Agrobiology of Seville, Spanish National Research Council, Seville, Spain
| | - Rasmus Kjøller
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Mark Tibbett
- Centre for Agri-Environmental Research and Soil Research Centre, School of Agriculture, Policy and Development, University of Reading, Reading, United Kingdom
| | - Teodoro Marañón
- Department for Protection of the Soil, Plant and Water System, Institute of Natural Resources and Agrobiology of Seville, Spanish National Research Council, Seville, Spain
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30
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Root diameter predicts the extramatrical hyphal exploration distance of the ectomycorrhizal fungal community. Ecosphere 2018. [DOI: 10.1002/ecs2.2202] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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