Preferential Allocation of Photosynthate toward Better Mutualists, Spatial Structure, and the Maintenance of the Arbuscular Mycorrhizal Mutualism
Preferential Allocation of Photosynthate toward Better Mutualists, Spatial Structure, and the Maintenance of the Arbuscular Mycorrhizal Mutualism
批准号:
0919434
负责人:
James Bever
金额:
$46.85万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2009
资助国家:
美国
项目状态:
已结题
起止时间:
2009-08-01 至 2013-07-31
中文摘要
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英文摘要
Arbuscular mycorrhizal (AM) fungi form beneficial associations with the roots of most plant species, including most crop plants. These fungi increase plant access to immobile soil minerals and receive plant carbohydrates in return. While this interaction can be mutually beneficial between plants and fungi, the extent to which the fungi increase plant growth varies across soil environments and fungal isolates. Moreover the benefit has been observed to increase and degrade over time. Currently, there is little basis for predictive understanding of these dynamics. Recent work has demonstrated that plants can allocate their carbohydrates preferentially toward the most beneficial fungus. This preferential allocation allows the effective fungus to increase in the face of competition from non-beneficial fungi provided that there is sufficient spatial separation between the fungi within a plant's root system. Preferential allocation may form a foundation on which to understand the persistence of beneficial fungi and change in their abundance over time. The proposed work will test resource triggers and environmental dependence of preferential allocation and test patterns of preferential allocation across plant and fungal species. Finally, fungal population response to manipulation of spatial mixing of the fungi within the plant root system will be evaluated. These results will be used to develop predictions for changes in abundance of beneficial fungi across environmental gradients. The proposed research will train undergraduates, graduate students and postdoctoral scientists in techniques used to measure and manipulate beneficial AM fungi. In addition, this research will create opportunities for independent undergraduate research. In particular, an experiment testing how mycorrhizal fungi may benefit restoration of a native prairie on the campus of Indiana University will be initiated as part of a non-majors course in environmental biology. Students will thus be exposed to multiple aspects of ecological research related to this project.
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Collaborative Research: CSBR: Ownership Transfer: Living Stocks: International Culture Collection of Arbuscular Mycorrhizal Fungi (INVAM)
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批准号:2027458
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项目类别:Standard Grant
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资助金额:$46.09万
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财政年份:2021
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负责人:James Bever
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依托单位:
Dimensions US-China: Collaborative Research: Microbe eco-evolutionary feedbacks as drivers of plant coexistence and diversity gradients
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批准号:1738041
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财政年份:2018
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负责人:James Bever
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依托单位:
Ecological Dynamics of the Plant-Arbuscular Mycorrhizal Fungal Mutualism: Contribution to Plant Species Turnover and Coexistence
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批准号:1556664
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项目类别:Standard Grant
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资助金额:$60.0万
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财政年份:2016
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负责人:James Bever
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依托单位:
DISSERTATION RESEARCH: Does hosting arbuscular mycorrhizal fungi in modular structures facilitate discrimination against cheaters?
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批准号:1405347
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项目类别:Standard Grant
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资助金额:$1.94万
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财政年份:2014
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负责人:James Bever
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依托单位:
OPUS: Microbial Dynamics and the Structure of Plant Communities
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批准号:1050237
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项目类别:Standard Grant
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资助金额:$16.91万
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财政年份:2011
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负责人:James Bever
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依托单位:
Dissertation Research: The biotic environment and the context-dependent nature of plant-microbial symbiosis
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批准号:1011334
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项目类别:Standard Grant
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资助金额:$1.27万
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财政年份:2010
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负责人:James Bever
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依托单位:
DISSERTATION RESEARCH: Multilevel Selection of the Ti Plasmid in Agrobacterium Tumefaciens
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批准号:0608155
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项目类别:Standard Grant
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资助金额:$1.19万
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财政年份:2006
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负责人:James Bever
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依托单位:
Biodiversity of AM Fungi in the Grasslands of North America: Understanding the Foundation of Terrestrial Ecosystems
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批准号:0616891
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项目类别:Standard Grant
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资助金额:$32.3万
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财政年份:2006
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负责人:James Bever
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依托单位:
Dissertation Research: Mechanisms Underlying Complex Interactions Between Plants, Herbivores, and Arbuscular Mycorrhizal Fungi
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批准号:0407816
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项目类别:Standard Grant
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资助金额:$1.2万
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财政年份:2004
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负责人:James Bever
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依托单位:
DISSERTATION RESEARCH: Ecological and Evolutionary Implications of Rodent-mediated Spore Dispersal of Arbuscular Mycorrhizal Fungi
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批准号:0308779
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项目类别:Standard Grant
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资助金额:$1.2万
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财政年份:2003
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负责人:James Bever
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依托单位:
CAREER: Ecology and Evolution of Mutualism in Arbuscular Mycorrhizal Fungi
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批准号:0049080
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项目类别:Standard Grant
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资助金额:$35.0万
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财政年份:2000
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负责人:James Bever
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依托单位:
CAREER: Ecology and Evolution of Mutualism in Arbuscular Mycorrhizal Fungi
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批准号:9985272
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项目类别:Standard Grant
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资助金额:$35.0万
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财政年份:2000
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负责人:James Bever
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依托单位:
Competition and Coexistence: The Role of Soil Community Feedback
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批准号:9996221
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项目类别:Continuing Grant
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资助金额:$14.11万
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财政年份:1999
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负责人:James Bever
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依托单位:
Competition and Coexistence: The Role of Soil Community Feedback
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批准号:9615941
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项目类别:Continuing Grant
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资助金额:$18.29万
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财政年份:1997
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负责人:James Bever
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依托单位:
国内基金
海外基金
CREB在杏仁核神经环路memory allocation中的作用和机制研究
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批准号:31171079
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项目类别:面上项目
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资助金额:55.0万元
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批准年份:2011
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负责人:周宇
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依托单位: