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Daouti E, Neidel V, Carbonne B, Vašková H, Traugott M, Wallinger C, Bommarco R, Feit B, Bohan DA, Saska P, Skuhrovec J, Vasconcelos S, Petit S, van der Werf W, Jonsson M. Functional redundancy of weed seed predation is reduced by intensified agriculture. Ecol Lett 2024; 27:e14411. [PMID: 38577993 DOI: 10.1111/ele.14411] [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: 04/06/2023] [Revised: 01/19/2024] [Accepted: 02/29/2024] [Indexed: 04/06/2024]
Abstract
Intensified agriculture, a driver of biodiversity loss, can diminish ecosystem functions and their stability. Biodiversity can increase functional redundancy and is expected to stabilize ecosystem functions. Few studies, however, have explored how agricultural intensity affects functional redundancy and its link with ecosystem function stability. Here, within a continental-wide study, we assess how functional redundancy of seed predation is affected by agricultural intensity and landscape simplification. By combining carabid abundances with molecular gut content data, functional redundancy of seed predation was quantified for 65 weed genera across 60 fields in four European countries. Across weed genera, functional redundancy was reduced with high field management intensity and simplified crop rotations. Moreover, functional redundancy increased the spatial stability of weed seed predation at the field scale. We found that ecosystem functions are vulnerable to disturbances in intensively managed agroecosystems, providing empirical evidence of the importance of biodiversity for stable ecosystem functions across space.
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Affiliation(s)
- Eirini Daouti
- Department of Crop Production Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Veronika Neidel
- Applied Animal Ecology, Department of Zoology, University of Innsbruck, Innsbruck, Austria
| | | | - Hana Vašková
- Functional Diversity in Agro-Ecosystems, Crop Research Institute, Praha 6, Ruzyně, Czech Republic
| | - Michael Traugott
- Applied Animal Ecology, Department of Zoology, University of Innsbruck, Innsbruck, Austria
| | - Corinna Wallinger
- Applied Animal Ecology, Department of Zoology, University of Innsbruck, Innsbruck, Austria
| | - Riccardo Bommarco
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Benjamin Feit
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - David A Bohan
- Agroécologie, INRAE, Institut Agro, Université de Bourgogne Franche-Comté, Dijon, France
| | - Pavel Saska
- Functional Diversity in Agro-Ecosystems, Crop Research Institute, Praha 6, Ruzyně, Czech Republic
| | - Jiří Skuhrovec
- Functional Diversity in Agro-Ecosystems, Crop Research Institute, Praha 6, Ruzyně, Czech Republic
| | - Sasha Vasconcelos
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Sandrine Petit
- Agroécologie, INRAE, Institut Agro, Université de Bourgogne Franche-Comté, Dijon, France
| | - Wopke van der Werf
- Centre for Crop Systems Analysis, Department of Plant Sciences, Wageningen University, Wageningen, The Netherlands
| | - Mattias Jonsson
- Department of Ecology, Swedish University of Agricultural Sciences, Uppsala, Sweden
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Chen W, Peng Y, Lin Q, Zhang T, Yan B, Bai L, Pan L. Germination Characteristics Associated With Glutathione S-Transferases Endowed Quizalofop-p-Ethyl Resistance in Polypogon fugax. FRONTIERS IN PLANT SCIENCE 2022; 13:861056. [PMID: 35665161 PMCID: PMC9158530 DOI: 10.3389/fpls.2022.861056] [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: 02/04/2022] [Accepted: 04/15/2022] [Indexed: 06/15/2023]
Abstract
Quantification of germination characteristics between herbicide-resistant and -susceptible weeds might provide methods to control resistant weeds and permit better prediction of evolution and persistence of herbicide resistance. This study aimed to compare the germination characteristics of Asian minor bluegrass (Polypogon fugax) populations that are resistant or susceptible to quizalofop-p-ethyl under controlled conditions, which the resistance mechanism is involved in glutathione S-transferases (GSTs) metabolism-based resistance. No major differences in seed germination were found at diverse temperatures, pH ranges, and light conditions. However, a significant difference that seed response to a gradient of osmotic and salt stress between the resistant and susceptible P. fugax populations were found. Two stress response genes (P5CS-1 and CDPK-2) in P. fugax were likely involved in germination rate as well as germination speed in response to these stresses. Subsequently, population verification demonstrated that P5CS-1 and CDPK-2 genes may be linked to the resistance mechanism. Additionally, the two genes play an important role in response to salt stress and osmotic stress as shown by transcript abundance after stress treatments. Our findings suggest that the variation of the germination characteristics in P. fugax associates with the presence of GST-endowed resistance mechanism.
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Affiliation(s)
- Wen Chen
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Yajun Peng
- Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Qiaojiao Lin
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | | | - Bei Yan
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Lianyang Bai
- College of Plant Protection, Hunan Agricultural University, Changsha, China
- Hunan Agricultural Biotechnology Research Institute, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Lang Pan
- College of Plant Protection, Hunan Agricultural University, Changsha, China
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Hulme PE, Liu W. Species prevalence and plant traits discriminate between herbicide resistant and susceptible weeds. PEST MANAGEMENT SCIENCE 2022; 78:313-320. [PMID: 34498809 DOI: 10.1002/ps.6636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 08/31/2021] [Accepted: 09/09/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Herbicide resistant weeds pose one of the most significant global challenges to sustainable food and fiber production. Plant traits are assumed to play a significant role in determining whether a weed is likely to evolve herbicide resistance but there have been few quantitative assessments to date. There is therefore an urgent need to investigate both the demographic and evolutionary characteristics of weeds to predict which weed species are likely to evolve herbicide resistance. Here, the discriminatory power of multiple plant traits was examined by comparing herbicide resistant and herbicide susceptible weeds in the United States. RESULTS Despite the taxonomic and agronomic similarity of herbicide resistant and susceptible weeds in the United States, differences between these groups were captured by a relatively small set of explanatory variables. Herbicide resistant weeds were found across more states than susceptible species and this suggests widespread weeds also happen to be more problematic in crops and therefore specifically targeted for weed control. In terms of traits, herbicide resistant species were more likely to be outcrossing, have unisexual flowers and be wind pollinated as well as have larger chromosome numbers and seed size than herbicide susceptible weeds. CONCLUSIONS A trait-based approach to understanding herbicide resistance confirms many assumptions as to the genetic attributes that make a weed more likely to evolve herbicide resistance. Scope therefore exists to build better risk assessment tools to identify future herbicide resistance hazards by incorporating plant traits, environmental tolerances, and evidence of herbicide resistance elsewhere in the world. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Philip E Hulme
- Bio-Protection Research Centre, Lincoln University, Christchurch, New Zealand
| | - Wenting Liu
- Bio-Protection Research Centre, Lincoln University, Christchurch, New Zealand
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Bhattarai R, Liu H, Siddique KHM, Yan G. Characterisation of a 4A QTL for Metribuzin Resistance in Wheat by Developing Near-Isogenic Lines. PLANTS (BASEL, SWITZERLAND) 2021; 10:1856. [PMID: 34579389 PMCID: PMC8466451 DOI: 10.3390/plants10091856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/26/2021] [Accepted: 09/05/2021] [Indexed: 11/17/2022]
Abstract
Wheat (Triticum aestivum L.) production is constantly affected by weeds in the farming system. Chemical-based weed management is widely practiced; broad-spectrum herbicides such as metribuzin have been successfully used to control weeds in Australia and elsewhere of the world. Breeding metribuzin-resistant wheat through genetic improvement is needed for effective control of weeds. Quantitative trait loci (QTLs) mapping efforts identified a major QTL on wheat chromosome 4A, explaining up to 20% of the phenotypic variance for metribuzin resistance. The quantitative nature of inheritance of this QTL signifies the importance of near-isogenic lines (NILs), which can convert a quantitative trait into a Mendelian factor for better resolution of the QTL. In the current study, NILs were developed using a heterogeneous inbred family method combined with a fast generation-cycling system in a population of Chuan Mai 25 (resistant) and Ritchie (susceptible). Seven pairs of NILs targeting the 4A QTL for metribuzin resistance were confirmed with a molecular marker and phenotyping. The resistant allele from the resistant parent increased metribuzin resistance by 63-85% (average 69%) compared with the susceptible allele from the susceptible parent. Segregation analysis in the NIL pairs for thousand grain weight (TGW) (g), biomass per plant (kg), tillers per plant, plant height (cm), yield per plant, and powdery mildew visual score (0-9) indicated that these traits were linked with metribuzin resistance. Similarly, TGW was observed to co-segregate with metribuzin resistance in most confirmed NILs, signifying that the two traits are controlled by closely linked genes. The most contrasting NILs can be further characterised by transcriptomic and proteomic analyses to identify the candidate genes responsible for metribuzin resistance.
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Affiliation(s)
- Rudra Bhattarai
- UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; (R.B.); (K.H.M.S.)
- The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Hui Liu
- UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; (R.B.); (K.H.M.S.)
- The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Kadambot H. M. Siddique
- UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; (R.B.); (K.H.M.S.)
- The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Guijun Yan
- UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia; (R.B.); (K.H.M.S.)
- The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
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