DOI: 10.1111/gcb.13884
Scopus记录号: 2-s2.0-85040558686
论文题名: Mycorrhizal fungi enhance plant nutrient acquisition and modulate nitrogen loss with variable water regimes
作者: Bowles T.M. ; Jackson L.E. ; Cavagnaro T.R.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期: 1 起始页码: e171
结束页码: e182
语种: 英语
英文关键词: arbuscular mycorrhizal fungi
; climate change
; drought
; nitrogen leaching
; nutrient uptake
Scopus关键词: arbuscular mycorrhiza
; climate change
; drought
; ecosystem function
; fungus
; nitrogen
; nutrient uptake
; soil water
; water availability
; Fungi
; Lycopersicon esculentum
; nitrogen
; water
; ecosystem
; fungus
; growth, development and aging
; metabolism
; microbiology
; mycorrhiza
; physiology
; plant root
; soil
; tomato
; Ecosystem
; Fungi
; Lycopersicon esculentum
; Mycorrhizae
; Nitrogen
; Plant Roots
; Soil
; Water
英文摘要: Climate change will alter both the amount and pattern of precipitation and soil water availability, which will directly affect plant growth and nutrient acquisition, and potentially, ecosystem functions like nutrient cycling and losses as well. Given their role in facilitating plant nutrient acquisition and water stress resistance, arbuscular mycorrhizal (AM) fungi may modulate the effects of changing water availability on plants and ecosystem functions. The well-characterized mycorrhizal tomato (Solanum lycopersicum L.) genotype 76R (referred to as MYC+) and the mutant mycorrhiza-defective tomato genotype rmc were grown in microcosms in a glasshouse experiment manipulating both the pattern and amount of water supply in unsterilized field soil. Following 4 weeks of differing water regimes, we tested how AM fungi affected plant productivity and nutrient acquisition, short-term interception of a 15NH+ 4 pulse, and inorganic nitrogen (N) leaching from microcosms. AM fungi enhanced plant nutrient acquisition with both lower and more variable water availability, for instance increasing plant P uptake more with a pulsed water supply compared to a regular supply and increasing shoot N concentration more when lower water amounts were applied. Although uptake of the short-term 15NH+ 4 pulse was higher in rmc plants, possibly due to higher N demand, AM fungi subtly modulated NO- 3 leaching, decreasing losses by 54% at low and high water levels in the regular water regime, with small absolute amounts of NO- 3leached (<1 kg N/ha). Since this study shows that AM fungi will likely be an important moderator of plant and ecosystem responses to adverse effects of more variable precipitation, management strategies that bolster AM fungal communities may in turn create systems that are more resilient to these changes. © 2017 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110583
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, CA, United States; Department of Land, Air and Water Resources, University of California Davis, Davis, CA, United States; The School of Agriculture, Food and Wine, The Waite Research Institute, University of Adelaide, Adelaide, SA, Australia
Recommended Citation:
Bowles T.M.,Jackson L.E.,Cavagnaro T.R.. Mycorrhizal fungi enhance plant nutrient acquisition and modulate nitrogen loss with variable water regimes[J]. Global Change Biology,2018-01-01,24(1)