1
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Lau JA, Bolin LG. The tiny drivers behind plant ecology and evolution. AMERICAN JOURNAL OF BOTANY 2024; 111:e16324. [PMID: 38666516 DOI: 10.1002/ajb2.16324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/28/2024] [Accepted: 02/28/2024] [Indexed: 05/29/2024]
Affiliation(s)
- Jennifer A Lau
- Biology Department, Indiana University, 1001 E 3rd St., Bloomington, 47405, IN, USA
| | - Lana G Bolin
- Biology Department, Indiana University, 1001 E 3rd St., Bloomington, 47405, IN, USA
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2
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Kong CH, Li Z, Li FL, Xia XX, Wang P. Chemically Mediated Plant-Plant Interactions: Allelopathy and Allelobiosis. PLANTS (BASEL, SWITZERLAND) 2024; 13:626. [PMID: 38475470 DOI: 10.3390/plants13050626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/20/2024] [Accepted: 02/22/2024] [Indexed: 03/14/2024]
Abstract
Plant-plant interactions are a central driver for plant coexistence and community assembly. Chemically mediated plant-plant interactions are represented by allelopathy and allelobiosis. Both allelopathy and allelobiosis are achieved through specialized metabolites (allelochemicals or signaling chemicals) produced and released from neighboring plants. Allelopathy exerts mostly negative effects on the establishment and growth of neighboring plants by allelochemicals, while allelobiosis provides plant neighbor detection and identity recognition mediated by signaling chemicals. Therefore, plants can chemically affect the performance of neighboring plants through the allelopathy and allelobiosis that frequently occur in plant-plant intra-specific and inter-specific interactions. Allelopathy and allelobiosis are two probably inseparable processes that occur together in plant-plant chemical interactions. Here, we comprehensively review allelopathy and allelobiosis in plant-plant interactions, including allelopathy and allelochemicals and their application for sustainable agriculture and forestry, allelobiosis and plant identity recognition, chemically mediated root-soil interactions and plant-soil feedback, and biosynthesis and the molecular mechanisms of allelochemicals and signaling chemicals. Altogether, these efforts provide the recent advancements in the wide field of allelopathy and allelobiosis, and new insights into the chemically mediated plant-plant interactions.
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Affiliation(s)
- Chui-Hua Kong
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Zheng Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Feng-Li Li
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Xin-Xin Xia
- College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
| | - Peng Wang
- Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
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3
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O'Brien AM, Laurich JR, Frederickson ME. Evolutionary consequences of microbiomes for hosts: impacts on host fitness, traits, and heritability. Evolution 2024; 78:237-252. [PMID: 37828761 DOI: 10.1093/evolut/qpad183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 08/30/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023]
Abstract
An organism's phenotypes and fitness often depend on the interactive effects of its genome (Ghost), microbiome (Gmicrobe), and environment (E). These G × G, G × E, and G × G × E effects fundamentally shape host-microbiome (co)evolution and may be widespread, but are rarely compared within a single experiment. We collected and cultured Lemnaminor (duckweed) and its associated microbiome from 10 sites across an urban-to-rural ecotone. We factorially manipulated host genotype and microbiome in two environments (low and high zinc, an urban aquatic stressor) in an experiment with 200 treatments: 10 host genotypes × 10 microbiomes × 2 environments. Host genotype explained the most variation in L.minor fitness and traits, while microbiome effects often depended on host genotype (G × G). Microbiome composition predicted G × G effects: when compared in more similar microbiomes, duckweed genotypes had more similar effects on traits. Further, host fitness increased and microbes grew faster when applied microbiomes more closely matched the host's field microbiome, suggesting some local adaptation between hosts and microbiota. Finally, selection on and heritability of host traits shifted across microbiomes and zinc exposure. Thus, we found that microbiomes impact host fitness, trait expression, and heritability, with implications for host-microbiome evolution and microbiome breeding.
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Affiliation(s)
- Anna M O'Brien
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, United States
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Jason R Laurich
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Megan E Frederickson
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
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4
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Blakney AJC, St-Arnaud M, Hijri M. Does soil history decline in influencing the structure of bacterial communities of Brassica napus host plants across different growth stages? ISME COMMUNICATIONS 2024; 4:ycae019. [PMID: 38500702 PMCID: PMC10944699 DOI: 10.1093/ismeco/ycae019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 01/24/2024] [Accepted: 01/29/2024] [Indexed: 03/20/2024]
Abstract
Soil history has been shown to condition future rhizosphere microbial communities. However, previous experiments have also illustrated that mature, adult plants can "re-write," or mask, different soil histories through host plant-soil community feedbacks. This leaves a knowledge gap concerning how soil history influences bacterial community structure across different growth stages. Thus, here we tested the hypothesis that previously established soil histories will decrease in influencing the structure of Brassica napus bacterial communities over the growing season. We used an on-going agricultural field experiment to establish three different soil histories, plots of monocrop canola (B. napus), or rotations of wheat-canola, or pea-barley-canola. During the following season, we repeatedly sampled the surrounding bulk soil, rhizosphere, and roots of the B. napus hosts at different growth stages-the initial seeding conditions, seedling, rosette, bolting, and flower-from all three soil history plots. We compared composition and diversity of the B. napus soil bacterial communities, as estimated using 16S rRNA gene metabarcoding, to identify any changes associated with soil history and growth stages. We found that soil history remained significant across each growth stage in structuring the bacterial bulk soil and rhizosphere communities, but not the bacterial root communities. This suggests that the host plant's capacity to "re-write" different soil histories may be quite limited as key components that constitute the soil history's identity remain present, such that the previously established soil history continues to impact the bacterial rhizosphere communities, but not the root communities. For agriculture, this highlights how previously established soil histories persist and may have important long-term consequences on future plant-microbe communities, including bacteria.
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Affiliation(s)
- Andrew J C Blakney
- Institut de recherche en biologie végétale, Département de Sciences Biologiques, Université de Montréal and Jardin botanique de Montréal, Montréal, Québec, H1X 2B2, Canada
- Present address: Department of Physical and Environmental Sciences, University of Toronto, Scarborough, Ontario, M1C 1A4, Canada
| | - Marc St-Arnaud
- Institut de recherche en biologie végétale, Département de Sciences Biologiques, Université de Montréal and Jardin botanique de Montréal, Montréal, Québec, H1X 2B2, Canada
| | - Mohamed Hijri
- Institut de recherche en biologie végétale, Département de Sciences Biologiques, Université de Montréal and Jardin botanique de Montréal, Montréal, Québec, H1X 2B2, Canada
- African Genome Center, Mohammed VI Polytechnic University (UM6P), Lot 660, Hay Moulay Rachid, Ben Guerir 43150, Morocco
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5
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García Y, Dow BS, Parachnowitsch AL. Water deficit changes patterns of selection on floral signals and nectar rewards in the common morning glory. AOB PLANTS 2023; 15:plad061. [PMID: 37899982 PMCID: PMC10601024 DOI: 10.1093/aobpla/plad061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 08/24/2023] [Indexed: 10/31/2023]
Abstract
Understanding whether and how resource limitation alters phenotypic selection on floral traits is key to predict the evolution of plant-pollinator interactions under climate change. Two important resources predicted to decline with our changing climate are pollinators and water in the form of increased droughts. Most work, however, has studied these selective agents separately and in the case of water deficit, studies are rare. Here, we use the common morning glory (Ipomoea purpurea) to investigate the effects of experimental reduction in pollinator access and water availability on floral signals and nectar rewards and their effects on phenotypic selection on these traits. We conducted a manipulative experiment in a common garden, where we grew plants in three treatments: (1) pollinator restriction, (2) water reduction and (3) unmanipulated control. Plants in pollinator restriction and control treatments were well-watered compared to water deficit. We found that in contrast to pollinator restriction, water deficit had strong effects altering floral signals and nectar rewards but also differed in the direction and strength of selection on these traits compared to control plants. Water deficit increased the opportunity for selection, and selection in this treatment favoured lower nectar volumes and larger floral sizes, which might further alter pollinator visitation. In addition, well-watered plants, both in control and pollinator deficit, showed similar patterns of selection to increase nectar volume suggesting non-pollinator-mediated selection on nectar. Our study shows that floral traits may evolve in response to reduction in water access faster than to declines in pollinators and reinforces that abiotic factors can be important agents of selection for floral traits. Although only few experimental selection studies have manipulated access to biotic and abiotic resources, our results suggest that this approach is key for understanding how pollination systems may evolve under climate change.
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Affiliation(s)
- Yedra García
- Department of Biology, University of New Brunswick, 10 Bailey Dr, Fredericton, NB E3B 5A3, Canada
| | - Benjamin S Dow
- Department of Biology, University of New Brunswick, 10 Bailey Dr, Fredericton, NB E3B 5A3, Canada
| | - Amy L Parachnowitsch
- Department of Biology, University of New Brunswick, 10 Bailey Dr, Fredericton, NB E3B 5A3, Canada
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Ghouili E, Abid G, Hogue R, Jeanne T, D'Astous-Pagé J, Sassi K, Hidri Y, M'Hamed HC, Somenahally A, Xue Q, Jebara M, Nefissi Ouertani R, Riahi J, de Oliveira AC, Muhovski Y. Date Palm Waste Compost Application Increases Soil Microbial Community Diversity in a Cropping Barley ( Hordeum vulgare L.) Field. BIOLOGY 2023; 12:biology12040546. [PMID: 37106747 PMCID: PMC10135526 DOI: 10.3390/biology12040546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/29/2023] [Accepted: 04/01/2023] [Indexed: 04/29/2023]
Abstract
Application of date palm waste compost is quite beneficial in improving soil properties and crop growth. However, the effect of its application on soil microbial communities is less understood. High-throughput sequencing and quantitative real-time PCR (qPCR) were used to evaluate the effect of compost application on the soil microbial composition in a barley field during the tillering, booting and ripening stages. The results showed that compost treatment had the highest bacterial and fungal abundance, and its application significantly altered the richness (Chao1 index) and α-diversity (Shannon index) of fungal and bacterial communities. The dominant bacterial phyla found in the samples were Proteobacteria and Actinobacteria while the dominant fungal orders were Ascomycota and Mortierellomycota. Interestingly, compost enriched the relative abundance of beneficial microorganisms such as Chaetomium, Actinobacteriota, Talaromyces and Mortierella and reduced those of harmful microorganisms such as Alternaria, Aspergillus and Neocosmospora. Functional prediction based on Phylogenetic Investigation of Communities by Reconstruction of Unobserved States (PICRUSt) showed that amplicon sequence variant (ASV) sequences related to energy metabolism, amino acid metabolism and carbohydrate metabolism were associated with compost-treated soil. Based on Fungi Functional Guild (FUNGuild), identified fungi community metabolic functions such as wood saprotroph, pathotroph, symbiotroph and endophyte were associated with compost-treated soil. Overall, compost addition could be considered as a sustainable practice for establishing a healthy soil microbiome and subsequently improving the soil quality and barley crop production.
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Affiliation(s)
- Emna Ghouili
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Ghassen Abid
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Richard Hogue
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Thomas Jeanne
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Joël D'Astous-Pagé
- Microbial Ecology Laboratory, Research and Development Institute for the Agri-Environment (IRDA), Einstein Street 2700, Québec City, QC G1P 3W8, Canada
| | - Khaled Sassi
- Laboratory of Agronomy, National Agronomy Institute of Tunisia (INAT), University of Carthage, Avenue Charles Nicolle, Tunis-Mahrajène 1082, BP 43, Tunisia
| | - Yassine Hidri
- Olive Tree Institute, Laboratory of Integrated Olive Production in the Humid, Sub-humid and Semi-arid Region (LR16IO3), Cité Mahragène 1082, BP 208, Tunisia
| | - Hatem Cheikh M'Hamed
- Agronomy Laboratory, National Institute of Agronomic Research of Tunis (INRAT), University of Carthage, Hedi Karray Street, Ariana 2049, Tunisia
| | - Anil Somenahally
- Department of Soil and Crop Sciences, Texas A&M University, 370 Olsen Blvd., College Station, TX 77843-2474, USA
| | - Qingwu Xue
- Texas A&M AgriLife Research and Extension Center, Amarillo, TX 79106, USA
| | - Moez Jebara
- Laboratory of Legumes and Sustainable Agrosystems, Centre of Biotechnology of Borj-Cedria, (L2AD, CBBC), Hammam-Lif 2050, PB 901, Tunisia
| | - Rim Nefissi Ouertani
- Laboratory of Plant Molecular Physiology, Centre of Biotechnology of Borj Cedria, Hammam-Lif 2050, BP 901, Tunisia
| | - Jouhaina Riahi
- Technical Center for Organic Agriculture, Chott Mariem, Sousse 4042, BP 54, Tunisia
| | - Ana Caroline de Oliveira
- Biological Engineering Unit, Department of Life Sciences, Walloon Agricultural Research Centre, Chaussée de Charleroi, 5030 Gembloux, 234 BP, Belgium
| | - Yordan Muhovski
- Biological Engineering Unit, Department of Life Sciences, Walloon Agricultural Research Centre, Chaussée de Charleroi, 5030 Gembloux, 234 BP, Belgium
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Khasanova A, Edwards J, Bonnette J, Singer E, Haque T, Juenger TE. Quantitative genetic-by-soil microbiome interactions in a perennial grass affect functional traits. Proc Biol Sci 2023; 290:20221350. [PMID: 36651054 PMCID: PMC9845970 DOI: 10.1098/rspb.2022.1350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Plants interact with diverse microbiomes that can impact plant growth and performance. Recent studies highlight the potential beneficial aspects of plant microbiomes, including the possibility that microbes facilitate the process of local adaptation in their host plants. Microbially mediated local adaptation in plants occurs when local host genotypes have higher fitness than foreign genotypes because of their affiliation with locally beneficial microbes. Here, plant adaptation results from genetic interactions of the host with locally beneficial microbes (e.g. host genotype-by-microbiome interactions). We used a recombinant inbred line (RIL) mapping population derived from upland and lowland ecotypes of the diploid C4 perennial bunch grass Panicum hallii to explore quantitative genetic responses to soil microbiomes focusing on functional root and shoot traits involved in ecotypic divergence. We show that the growth and development of ecotypes and their trait divergence depends on soil microbiomes. Moreover, we find that the genetic architecture is modified by soil microbiomes, revealing important plant genotype-by-microbiome interactions for quantitative traits. We detected a number of quantitative trait loci (QTL) that interact with the soil microbiome. Our results highlight the importance of microbial interactions in ecotypic divergence and trait genetic architecture in C4 perennial grasses.
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Affiliation(s)
- Albina Khasanova
- Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway #C0930, Austin, TX 78712, USA,Lawrence Berkeley National Laboratory, 717 Potter Street, Berkeley, CA 94710, USA
| | - Joseph Edwards
- Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway #C0930, Austin, TX 78712, USA
| | - Jason Bonnette
- Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway #C0930, Austin, TX 78712, USA
| | - Esther Singer
- Department of Energy Joint Genome Institute, 1 Cyclotron Road, Berkeley, CA 94720, USA,Lawrence Berkeley National Laboratory, 717 Potter Street, Berkeley, CA 94710, USA
| | - Taslima Haque
- Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway #C0930, Austin, TX 78712, USA
| | - Thomas E. Juenger
- Department of Integrative Biology, The University of Texas at Austin, 2415 Speedway #C0930, Austin, TX 78712, USA
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Li W, Bi X, Zheng Y. Soil legacy effects on biomass allocation depend on native plant diversity in the invaded community. Sci Prog 2023; 106:368504221150060. [PMID: 36751108 PMCID: PMC10450268 DOI: 10.1177/00368504221150060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The biodiversity of aboveground plants and belowground microbes is key for plant communities resisting exotic plant invasion. Whether the soil legacy effects after the invasion are related to the diversity of the invaded community is less studied. Soils from invaded communities were collected and potted to investigate the effects of the invasive community's legacy on the biomass allocation of plants that later grew in these soils. The plots where native plants were present had relatively high nutrient levels (except for available nitrogen) compared to the monodominance communities invaded by Chromolaena odorata. This also indirectly suggests that the severe invasion of C. odorata depleted the nutrients in the soil to a greater extent. When soils were from communities with only C. odorata or one native plant, their biotic legacies showed a significantly positive effect on biomass accumulation of subsequent invasive plants, but this positive effect became negative when more than two native plants were present in the invaded community. This result indicated that the effect of biological resistance increases with the number increase of native species in the invaded communities. The soil legacy effect of the invaded communities on subsequent plants depended on the diversity of native plants. This study can provide insights into the mechanisms of soil biological resistance to exotic plant invasion and provide a theoretical basis for the removal of soil legacy effects after the exotic plant invasion.
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Affiliation(s)
- Weitao Li
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Menglun, China
| | - Xiaoting Bi
- College of Agriculture and Forestry, Puer University, Puer, China
| | - Yulong Zheng
- CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, China
- Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Menglun, China
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9
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Angulo V, Beriot N, Garcia-Hernandez E, Li E, Masteling R, Lau JA. Plant-microbe eco-evolutionary dynamics in a changing world. THE NEW PHYTOLOGIST 2022; 234:1919-1928. [PMID: 35114015 DOI: 10.1111/nph.18015] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 01/19/2022] [Indexed: 06/14/2023]
Abstract
Both plants and their associated microbiomes can respond strongly to anthropogenic environmental changes. These responses can be both ecological (e.g. a global change affecting plant demography or microbial community composition) and evolutionary (e.g. a global change altering natural selection on plant or microbial populations). As a result, global changes can catalyse eco-evolutionary feedbacks. Here, we take a plant-focused perspective to discuss how microbes mediate plant ecological responses to global change and how these ecological effects can influence plant evolutionary response to global change. We argue that the strong and functionally important relationships between plants and their associated microbes are particularly likely to result in eco-evolutionary feedbacks when perturbed by global changes and discuss how improved understanding of plant-microbe eco-evolutionary dynamics could inform conservation or even agriculture.
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Affiliation(s)
- Violeta Angulo
- Ecology and Biodiversity Group, Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584 CH, the Netherlands
| | - Nicolas Beriot
- Soil Physics and Land Management Group, Wageningen University & Research, PO Box 47, Wageningen, 6700AA, the Netherlands
- Sustainable Use, Management and Reclamation of Soil and Water Research Group, Universidad Politécnica de Cartagena, Paseo Alfonso XIII, 48, Cartagena, 30203, Spain
| | - Edisa Garcia-Hernandez
- Microbial Community Ecology Group, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, 9700 CC, the Netherlands
| | - Erqin Li
- Plant-Microbe Interactions Group, Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584 CH, the Netherlands
- Institut für Biologie, Freie Universität Berlin, Berlin, 14195, Germany
- Berlin-Brandenburg Institute of Advanced Biodiversity Research (BBIB), Berlin, 14195, Germany
| | - Raul Masteling
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), PO Box 50, Wageningen, 6708 PB, the Netherlands
- Institute of Biology, Leiden University, Leiden, 2333 BE, the Netherlands
| | - Jennifer A Lau
- Biology Department and the Environmental Resilience Institute, Indiana University, 1001 East 3rd St., Bloomington, IN, 47405, USA
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Shi P, Zhang J, Li X, Zhou L, Luo H, Wang L, Zhang Y, Chou M, Wei G. Multiple Metabolic Phenotypes as Screening Criteria Are Correlated With the Plant Growth-Promoting Ability of Rhizobacterial Isolates. Front Microbiol 2022; 12:747982. [PMID: 35069464 PMCID: PMC8767003 DOI: 10.3389/fmicb.2021.747982] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 12/13/2021] [Indexed: 11/13/2022] Open
Abstract
Efficient screening method is the prerequisite for getting plant growth-promoting (PGP) rhizobacteria (PGPR) which may play an important role in sustainable agriculture from the natural environment. Many current traditional preliminary screening criteria based on knowledge of PGP mechanisms do not always work well due to complex plant-microbe interactions and may lead to the low screening efficiency. More new screening criteria should be evaluated to establish a more effective screening system. However, the studies focused on this issue were not enough, and few new screening criteria had been proposed. The aim of this study was to analyze the correlation between the metabolic phenotypes of rhizobacterial isolates and their PGP ability. The feasibility of using these phenotypes as preliminary screening criteria for PGPR was also evaluated. Twenty-one rhizobacterial isolates were screened for their PGP ability, traditional PGP traits, and multiple metabolic phenotypes that are not directly related to PGP mechanisms, but are possibly related to rhizosphere colonization. Correlations between the PGP traits or metabolic phenotypes and increases in plant agronomic parameters were analyzed to find the indicators that are most closely related to PGP ability. The utilization of 11 nutrient substrates commonly found in root exudates, such as D-salicin, β-methyl-D-glucoside, and D-cellobiose, was significantly positively correlated with the PGP ability of the rhizobacterial isolates. The utilization of one amino acid and two organic acids, namely L-aspartic acid, α-keto-glutaric acid, and formic acid, was negatively correlated with PGP ability. There were no significant correlations between four PGP traits tested in this study and the PGP ability. The ability of rhizobacterial isolates to metabolize nutrient substrates that are identical or similar to root exudate components may act as better criteria than PGP traits for the primary screening of PGPR, because rhizosphere colonization is a prerequisite for PGPR to affect plants.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Gehong Wei
- State Key Laboratory of Crop Stress Biology in Arid Areas, Shaanxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, China
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11
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O'Brien AM, Ginnan NA, Rebolleda-Gómez M, Wagner MR. Microbial effects on plant phenology and fitness. AMERICAN JOURNAL OF BOTANY 2021; 108:1824-1837. [PMID: 34655479 DOI: 10.1002/ajb2.1743] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
Plant development and the timing of developmental events (phenology) are tightly coupled with plant fitness. A variety of internal and external factors determine the timing and fitness consequences of these life-history transitions. Microbes interact with plants throughout their life history and impact host phenology. This review summarizes current mechanistic and theoretical knowledge surrounding microbe-driven changes in plant phenology. Overall, there are examples of microbes impacting every phenological transition. While most studies have focused on flowering time, microbial effects remain important for host survival and fitness across all phenological phases. Microbe-mediated changes in nutrient acquisition and phytohormone signaling can release plants from stressful conditions and alter plant stress responses inducing shifts in developmental events. The frequency and direction of phenological effects appear to be partly determined by the lifestyle and the underlying nature of a plant-microbe interaction (i.e., mutualistic or pathogenic), in addition to the taxonomic group of the microbe (fungi vs. bacteria). Finally, we highlight biases, gaps in knowledge, and future directions. This biotic source of plasticity for plant adaptation will serve an important role in sustaining plant biodiversity and managing agriculture under the pressures of climate change.
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Affiliation(s)
- Anna M O'Brien
- Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada
| | - Nichole A Ginnan
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
| | - María Rebolleda-Gómez
- Department of Ecology and Evolutionary Biology, University of California-Irvine, Irvine, CA, USA
| | - Maggie R Wagner
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, USA
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, Lawrence, KS, USA
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12
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Igwe AN, Quasem B, Liu N, Vannette RL. Plant phenology influences rhizosphere microbial community and is accelerated by serpentine microorganisms in Plantago erecta. FEMS Microbiol Ecol 2021; 97:6300443. [PMID: 34132353 DOI: 10.1093/femsec/fiab085] [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: 03/23/2021] [Accepted: 06/14/2021] [Indexed: 11/14/2022] Open
Abstract
Serpentine soils are drought-prone and rich in heavy metals, and plants growing on serpentine soils host distinct microbial communities that may affect plant survival and phenotype. However, whether the rhizosphere communities of plants from different soil chemistries are initially distinct or diverge over time may help us understand drivers of microbial community structure and function in stressful soils. Here, we test the hypothesis that rhizosphere microbial communities will converge over time (plant development), independent of soil chemistry and microbial source. We grew Plantago erecta in serpentine or nonserpentine soil, with serpentine or nonserpentine microbes and tracked plant growth and root phenotypes. We used 16S rRNA gene barcoding to compare bacterial species composition at seedling, vegetative, early- and late-flowering phases. Plant phenotype and rhizosphere bacterial communities were mainly structured by soil type, with minor contributions by plant development, microbe source and their interactions. Serpentine microorganisms promoted early flowering in plants on nonserpentine soils. Despite strong effects of soil chemistry, the convergence in bacterial community composition across development demonstrates the importance of the plant-microbe interactions in shaping microbial assembly processes across soil types.
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Affiliation(s)
- Alexandria N Igwe
- University of Miami, Department of Biology, 1301 Memorial Drive, Coral Gables, FL 33146, USA
| | - Bibi Quasem
- University of California, Davis, Department of Entomology and Nematology, One Shields Avenue, Davis, CA 95616, USA
| | - Naomi Liu
- University of California, Davis, Department of Entomology and Nematology, One Shields Avenue, Davis, CA 95616, USA
| | - Rachel L Vannette
- University of California, Davis, Department of Entomology and Nematology, One Shields Avenue, Davis, CA 95616, USA
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From the ground up: Building predictions for how climate change will affect belowground mutualisms, floral traits, and bee behavior. CLIMATE CHANGE ECOLOGY 2021. [DOI: 10.1016/j.ecochg.2021.100013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Wagner MR, Roberts JH, Balint-Kurti P, Holland JB. Heterosis of leaf and rhizosphere microbiomes in field-grown maize. THE NEW PHYTOLOGIST 2020; 228:1055-1069. [PMID: 32521050 DOI: 10.1111/nph.16730] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 05/28/2020] [Indexed: 05/21/2023]
Abstract
Macroorganisms' genotypes shape their phenotypes, which in turn shape the habitat available to potential microbial symbionts. This influence of host genotype on microbiome composition has been demonstrated in many systems; however, most previous studies have either compared unrelated genotypes or delved into molecular mechanisms. As a result, it is currently unclear whether the heritability of host-associated microbiomes follows similar patterns to the heritability of other complex traits. We take a new approach to this question by comparing the microbiomes of diverse maize inbred lines and their F1 hybrid offspring, which we quantified in both rhizosphere and leaves of field-grown plants using 16S-v4 and ITS1 amplicon sequencing. We show that inbred lines and hybrids differ consistently in the composition of bacterial and fungal rhizosphere communities, as well as leaf-associated fungal communities. A wide range of microbiome features display heterosis within individual crosses, consistent with patterns for nonmicrobial maize phenotypes. For leaf microbiomes, these results were supported by the observation that broad-sense heritability in hybrids was substantially higher than narrow-sense heritability. Our results support our hypothesis that at least some heterotic host traits affect microbiome composition in maize.
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Affiliation(s)
- Maggie R Wagner
- Department of Ecology and Evolutionary Biology, University of Kansas, Lawrence, KS, 66045, USA
- Kansas Biological Survey, University of Kansas, Lawrence, KS, 66045, USA
| | - Joseph H Roberts
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695, USA
| | - Peter Balint-Kurti
- Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC, 27695, USA
- Plant Science Research Unit, Agricultural Research Service, United States Department of Agriculture, Raleigh, NC, 27695, USA
| | - James B Holland
- Plant Science Research Unit, Agricultural Research Service, United States Department of Agriculture, Raleigh, NC, 27695, USA
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, 27695, USA
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Baucom RS, Heath KD, Chambers SM. Plant-environment interactions from the lens of plant stress, reproduction, and mutualisms. AMERICAN JOURNAL OF BOTANY 2020; 107:175-178. [PMID: 32060910 PMCID: PMC7186814 DOI: 10.1002/ajb2.1437] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 12/20/2019] [Indexed: 05/06/2023]
Affiliation(s)
- Regina S. Baucom
- Department of Ecology and Evolutionary BiologyUniversity of MichiganAnn ArborMI48109USA
| | - Katy D. Heath
- Department of Plant BiologyUniversity of Illinois at Urbana‐ChampaignUrbanaIL61801USA
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